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-rw-r--r--contrib/llvm/lib/MC/MCParser/AsmLexer.cpp608
-rw-r--r--contrib/llvm/lib/MC/MCParser/AsmParser.cpp4987
-rw-r--r--contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp796
-rw-r--r--contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp967
-rw-r--r--contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp738
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp36
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp50
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp22
-rw-r--r--contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp32
9 files changed, 8236 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp b/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp
new file mode 100644
index 0000000..36c1920
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/AsmLexer.cpp
@@ -0,0 +1,608 @@
+//===- AsmLexer.cpp - Lexer for Assembly Files ----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements the lexer for assembly files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SMLoc.h"
+#include <cctype>
+#include <cerrno>
+#include <cstdio>
+#include <cstdlib>
+using namespace llvm;
+
+AsmLexer::AsmLexer(const MCAsmInfo &MAI) : MAI(MAI) {
+ CurPtr = nullptr;
+ isAtStartOfLine = true;
+ AllowAtInIdentifier = !StringRef(MAI.getCommentString()).startswith("@");
+}
+
+AsmLexer::~AsmLexer() {
+}
+
+void AsmLexer::setBuffer(StringRef Buf, const char *ptr) {
+ CurBuf = Buf;
+
+ if (ptr)
+ CurPtr = ptr;
+ else
+ CurPtr = CurBuf.begin();
+
+ TokStart = nullptr;
+}
+
+/// ReturnError - Set the error to the specified string at the specified
+/// location. This is defined to always return AsmToken::Error.
+AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
+ SetError(SMLoc::getFromPointer(Loc), Msg);
+
+ return AsmToken(AsmToken::Error, StringRef(Loc, 0));
+}
+
+int AsmLexer::getNextChar() {
+ char CurChar = *CurPtr++;
+ switch (CurChar) {
+ default:
+ return (unsigned char)CurChar;
+ case 0:
+ // A nul character in the stream is either the end of the current buffer or
+ // a random nul in the file. Disambiguate that here.
+ if (CurPtr - 1 != CurBuf.end())
+ return 0; // Just whitespace.
+
+ // Otherwise, return end of file.
+ --CurPtr; // Another call to lex will return EOF again.
+ return EOF;
+ }
+}
+
+/// LexFloatLiteral: [0-9]*[.][0-9]*([eE][+-]?[0-9]*)?
+///
+/// The leading integral digit sequence and dot should have already been
+/// consumed, some or all of the fractional digit sequence *can* have been
+/// consumed.
+AsmToken AsmLexer::LexFloatLiteral() {
+ // Skip the fractional digit sequence.
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+
+ // Check for exponent; we intentionally accept a slighlty wider set of
+ // literals here and rely on the upstream client to reject invalid ones (e.g.,
+ // "1e+").
+ if (*CurPtr == 'e' || *CurPtr == 'E') {
+ ++CurPtr;
+ if (*CurPtr == '-' || *CurPtr == '+')
+ ++CurPtr;
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+ }
+
+ return AsmToken(AsmToken::Real,
+ StringRef(TokStart, CurPtr - TokStart));
+}
+
+/// LexHexFloatLiteral matches essentially (.[0-9a-fA-F]*)?[pP][+-]?[0-9a-fA-F]+
+/// while making sure there are enough actual digits around for the constant to
+/// be valid.
+///
+/// The leading "0x[0-9a-fA-F]*" (i.e. integer part) has already been consumed
+/// before we get here.
+AsmToken AsmLexer::LexHexFloatLiteral(bool NoIntDigits) {
+ assert((*CurPtr == 'p' || *CurPtr == 'P' || *CurPtr == '.') &&
+ "unexpected parse state in floating hex");
+ bool NoFracDigits = true;
+
+ // Skip the fractional part if there is one
+ if (*CurPtr == '.') {
+ ++CurPtr;
+
+ const char *FracStart = CurPtr;
+ while (isxdigit(*CurPtr))
+ ++CurPtr;
+
+ NoFracDigits = CurPtr == FracStart;
+ }
+
+ if (NoIntDigits && NoFracDigits)
+ return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
+ "expected at least one significand digit");
+
+ // Make sure we do have some kind of proper exponent part
+ if (*CurPtr != 'p' && *CurPtr != 'P')
+ return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
+ "expected exponent part 'p'");
+ ++CurPtr;
+
+ if (*CurPtr == '+' || *CurPtr == '-')
+ ++CurPtr;
+
+ // N.b. exponent digits are *not* hex
+ const char *ExpStart = CurPtr;
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+
+ if (CurPtr == ExpStart)
+ return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
+ "expected at least one exponent digit");
+
+ return AsmToken(AsmToken::Real, StringRef(TokStart, CurPtr - TokStart));
+}
+
+/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@?]*
+static bool IsIdentifierChar(char c, bool AllowAt) {
+ return isalnum(c) || c == '_' || c == '$' || c == '.' ||
+ (c == '@' && AllowAt) || c == '?';
+}
+AsmToken AsmLexer::LexIdentifier() {
+ // Check for floating point literals.
+ if (CurPtr[-1] == '.' && isdigit(*CurPtr)) {
+ // Disambiguate a .1243foo identifier from a floating literal.
+ while (isdigit(*CurPtr))
+ ++CurPtr;
+ if (*CurPtr == 'e' || *CurPtr == 'E' ||
+ !IsIdentifierChar(*CurPtr, AllowAtInIdentifier))
+ return LexFloatLiteral();
+ }
+
+ while (IsIdentifierChar(*CurPtr, AllowAtInIdentifier))
+ ++CurPtr;
+
+ // Handle . as a special case.
+ if (CurPtr == TokStart+1 && TokStart[0] == '.')
+ return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
+
+ return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
+}
+
+/// LexSlash: Slash: /
+/// C-Style Comment: /* ... */
+AsmToken AsmLexer::LexSlash() {
+ switch (*CurPtr) {
+ case '*': break; // C style comment.
+ case '/': return ++CurPtr, LexLineComment();
+ default: return AsmToken(AsmToken::Slash, StringRef(CurPtr-1, 1));
+ }
+
+ // C Style comment.
+ ++CurPtr; // skip the star.
+ while (1) {
+ int CurChar = getNextChar();
+ switch (CurChar) {
+ case EOF:
+ return ReturnError(TokStart, "unterminated comment");
+ case '*':
+ // End of the comment?
+ if (CurPtr[0] != '/') break;
+
+ ++CurPtr; // End the */.
+ return LexToken();
+ }
+ }
+}
+
+/// LexLineComment: Comment: #[^\n]*
+/// : //[^\n]*
+AsmToken AsmLexer::LexLineComment() {
+ // FIXME: This is broken if we happen to a comment at the end of a file, which
+ // was .included, and which doesn't end with a newline.
+ int CurChar = getNextChar();
+ while (CurChar != '\n' && CurChar != '\r' && CurChar != EOF)
+ CurChar = getNextChar();
+
+ if (CurChar == EOF)
+ return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
+ return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 0));
+}
+
+static void SkipIgnoredIntegerSuffix(const char *&CurPtr) {
+ // Skip ULL, UL, U, L and LL suffices.
+ if (CurPtr[0] == 'U')
+ ++CurPtr;
+ if (CurPtr[0] == 'L')
+ ++CurPtr;
+ if (CurPtr[0] == 'L')
+ ++CurPtr;
+}
+
+// Look ahead to search for first non-hex digit, if it's [hH], then we treat the
+// integer as a hexadecimal, possibly with leading zeroes.
+static unsigned doLookAhead(const char *&CurPtr, unsigned DefaultRadix) {
+ const char *FirstHex = nullptr;
+ const char *LookAhead = CurPtr;
+ while (1) {
+ if (isdigit(*LookAhead)) {
+ ++LookAhead;
+ } else if (isxdigit(*LookAhead)) {
+ if (!FirstHex)
+ FirstHex = LookAhead;
+ ++LookAhead;
+ } else {
+ break;
+ }
+ }
+ bool isHex = *LookAhead == 'h' || *LookAhead == 'H';
+ CurPtr = isHex || !FirstHex ? LookAhead : FirstHex;
+ if (isHex)
+ return 16;
+ return DefaultRadix;
+}
+
+static AsmToken intToken(StringRef Ref, APInt &Value)
+{
+ if (Value.isIntN(64))
+ return AsmToken(AsmToken::Integer, Ref, Value);
+ return AsmToken(AsmToken::BigNum, Ref, Value);
+}
+
+/// LexDigit: First character is [0-9].
+/// Local Label: [0-9][:]
+/// Forward/Backward Label: [0-9][fb]
+/// Binary integer: 0b[01]+
+/// Octal integer: 0[0-7]+
+/// Hex integer: 0x[0-9a-fA-F]+ or [0x]?[0-9][0-9a-fA-F]*[hH]
+/// Decimal integer: [1-9][0-9]*
+AsmToken AsmLexer::LexDigit() {
+ // Decimal integer: [1-9][0-9]*
+ if (CurPtr[-1] != '0' || CurPtr[0] == '.') {
+ unsigned Radix = doLookAhead(CurPtr, 10);
+ bool isHex = Radix == 16;
+ // Check for floating point literals.
+ if (!isHex && (*CurPtr == '.' || *CurPtr == 'e')) {
+ ++CurPtr;
+ return LexFloatLiteral();
+ }
+
+ StringRef Result(TokStart, CurPtr - TokStart);
+
+ APInt Value(128, 0, true);
+ if (Result.getAsInteger(Radix, Value))
+ return ReturnError(TokStart, !isHex ? "invalid decimal number" :
+ "invalid hexdecimal number");
+
+ // Consume the [bB][hH].
+ if (Radix == 2 || Radix == 16)
+ ++CurPtr;
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores type
+ // suffices on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return intToken(Result, Value);
+ }
+
+ if (*CurPtr == 'b') {
+ ++CurPtr;
+ // See if we actually have "0b" as part of something like "jmp 0b\n"
+ if (!isdigit(CurPtr[0])) {
+ --CurPtr;
+ StringRef Result(TokStart, CurPtr - TokStart);
+ return AsmToken(AsmToken::Integer, Result, 0);
+ }
+ const char *NumStart = CurPtr;
+ while (CurPtr[0] == '0' || CurPtr[0] == '1')
+ ++CurPtr;
+
+ // Requires at least one binary digit.
+ if (CurPtr == NumStart)
+ return ReturnError(TokStart, "invalid binary number");
+
+ StringRef Result(TokStart, CurPtr - TokStart);
+
+ APInt Value(128, 0, true);
+ if (Result.substr(2).getAsInteger(2, Value))
+ return ReturnError(TokStart, "invalid binary number");
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return intToken(Result, Value);
+ }
+
+ if (*CurPtr == 'x') {
+ ++CurPtr;
+ const char *NumStart = CurPtr;
+ while (isxdigit(CurPtr[0]))
+ ++CurPtr;
+
+ // "0x.0p0" is valid, and "0x0p0" (but not "0xp0" for example, which will be
+ // diagnosed by LexHexFloatLiteral).
+ if (CurPtr[0] == '.' || CurPtr[0] == 'p' || CurPtr[0] == 'P')
+ return LexHexFloatLiteral(NumStart == CurPtr);
+
+ // Otherwise requires at least one hex digit.
+ if (CurPtr == NumStart)
+ return ReturnError(CurPtr-2, "invalid hexadecimal number");
+
+ APInt Result(128, 0);
+ if (StringRef(TokStart, CurPtr - TokStart).getAsInteger(0, Result))
+ return ReturnError(TokStart, "invalid hexadecimal number");
+
+ // Consume the optional [hH].
+ if (*CurPtr == 'h' || *CurPtr == 'H')
+ ++CurPtr;
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return intToken(StringRef(TokStart, CurPtr - TokStart), Result);
+ }
+
+ // Either octal or hexadecimal.
+ APInt Value(128, 0, true);
+ unsigned Radix = doLookAhead(CurPtr, 8);
+ bool isHex = Radix == 16;
+ StringRef Result(TokStart, CurPtr - TokStart);
+ if (Result.getAsInteger(Radix, Value))
+ return ReturnError(TokStart, !isHex ? "invalid octal number" :
+ "invalid hexdecimal number");
+
+ // Consume the [hH].
+ if (Radix == 16)
+ ++CurPtr;
+
+ // The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
+ // suffixes on integer literals.
+ SkipIgnoredIntegerSuffix(CurPtr);
+
+ return intToken(Result, Value);
+}
+
+/// LexSingleQuote: Integer: 'b'
+AsmToken AsmLexer::LexSingleQuote() {
+ int CurChar = getNextChar();
+
+ if (CurChar == '\\')
+ CurChar = getNextChar();
+
+ if (CurChar == EOF)
+ return ReturnError(TokStart, "unterminated single quote");
+
+ CurChar = getNextChar();
+
+ if (CurChar != '\'')
+ return ReturnError(TokStart, "single quote way too long");
+
+ // The idea here being that 'c' is basically just an integral
+ // constant.
+ StringRef Res = StringRef(TokStart,CurPtr - TokStart);
+ long long Value;
+
+ if (Res.startswith("\'\\")) {
+ char theChar = Res[2];
+ switch (theChar) {
+ default: Value = theChar; break;
+ case '\'': Value = '\''; break;
+ case 't': Value = '\t'; break;
+ case 'n': Value = '\n'; break;
+ case 'b': Value = '\b'; break;
+ }
+ } else
+ Value = TokStart[1];
+
+ return AsmToken(AsmToken::Integer, Res, Value);
+}
+
+
+/// LexQuote: String: "..."
+AsmToken AsmLexer::LexQuote() {
+ int CurChar = getNextChar();
+ // TODO: does gas allow multiline string constants?
+ while (CurChar != '"') {
+ if (CurChar == '\\') {
+ // Allow \", etc.
+ CurChar = getNextChar();
+ }
+
+ if (CurChar == EOF)
+ return ReturnError(TokStart, "unterminated string constant");
+
+ CurChar = getNextChar();
+ }
+
+ return AsmToken(AsmToken::String, StringRef(TokStart, CurPtr - TokStart));
+}
+
+StringRef AsmLexer::LexUntilEndOfStatement() {
+ TokStart = CurPtr;
+
+ while (!isAtStartOfComment(CurPtr) && // Start of line comment.
+ !isAtStatementSeparator(CurPtr) && // End of statement marker.
+ *CurPtr != '\n' && *CurPtr != '\r' &&
+ (*CurPtr != 0 || CurPtr != CurBuf.end())) {
+ ++CurPtr;
+ }
+ return StringRef(TokStart, CurPtr-TokStart);
+}
+
+StringRef AsmLexer::LexUntilEndOfLine() {
+ TokStart = CurPtr;
+
+ while (*CurPtr != '\n' && *CurPtr != '\r' &&
+ (*CurPtr != 0 || CurPtr != CurBuf.end())) {
+ ++CurPtr;
+ }
+ return StringRef(TokStart, CurPtr-TokStart);
+}
+
+size_t AsmLexer::peekTokens(MutableArrayRef<AsmToken> Buf,
+ bool ShouldSkipSpace) {
+ const char *SavedTokStart = TokStart;
+ const char *SavedCurPtr = CurPtr;
+ bool SavedAtStartOfLine = isAtStartOfLine;
+ bool SavedSkipSpace = SkipSpace;
+
+ std::string SavedErr = getErr();
+ SMLoc SavedErrLoc = getErrLoc();
+
+ SkipSpace = ShouldSkipSpace;
+
+ size_t ReadCount;
+ for (ReadCount = 0; ReadCount < Buf.size(); ++ReadCount) {
+ AsmToken Token = LexToken();
+
+ Buf[ReadCount] = Token;
+
+ if (Token.is(AsmToken::Eof))
+ break;
+ }
+
+ SetError(SavedErrLoc, SavedErr);
+
+ SkipSpace = SavedSkipSpace;
+ isAtStartOfLine = SavedAtStartOfLine;
+ CurPtr = SavedCurPtr;
+ TokStart = SavedTokStart;
+
+ return ReadCount;
+}
+
+bool AsmLexer::isAtStartOfComment(const char *Ptr) {
+ const char *CommentString = MAI.getCommentString();
+
+ if (CommentString[1] == '\0')
+ return CommentString[0] == Ptr[0];
+
+ // FIXME: special case for the bogus "##" comment string in X86MCAsmInfoDarwin
+ if (CommentString[1] == '#')
+ return CommentString[0] == Ptr[0];
+
+ return strncmp(Ptr, CommentString, strlen(CommentString)) == 0;
+}
+
+bool AsmLexer::isAtStatementSeparator(const char *Ptr) {
+ return strncmp(Ptr, MAI.getSeparatorString(),
+ strlen(MAI.getSeparatorString())) == 0;
+}
+
+AsmToken AsmLexer::LexToken() {
+ TokStart = CurPtr;
+ // This always consumes at least one character.
+ int CurChar = getNextChar();
+
+ if (isAtStartOfComment(TokStart)) {
+ // If this comment starts with a '#', then return the Hash token and let
+ // the assembler parser see if it can be parsed as a cpp line filename
+ // comment. We do this only if we are at the start of a line.
+ if (CurChar == '#' && isAtStartOfLine)
+ return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
+ isAtStartOfLine = true;
+ return LexLineComment();
+ }
+ if (isAtStatementSeparator(TokStart)) {
+ CurPtr += strlen(MAI.getSeparatorString()) - 1;
+ return AsmToken(AsmToken::EndOfStatement,
+ StringRef(TokStart, strlen(MAI.getSeparatorString())));
+ }
+
+ // If we're missing a newline at EOF, make sure we still get an
+ // EndOfStatement token before the Eof token.
+ if (CurChar == EOF && !isAtStartOfLine) {
+ isAtStartOfLine = true;
+ return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+ }
+
+ isAtStartOfLine = false;
+ switch (CurChar) {
+ default:
+ // Handle identifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
+ if (isalpha(CurChar) || CurChar == '_' || CurChar == '.')
+ return LexIdentifier();
+
+ // Unknown character, emit an error.
+ return ReturnError(TokStart, "invalid character in input");
+ case EOF: return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
+ case 0:
+ case ' ':
+ case '\t':
+ if (SkipSpace) {
+ // Ignore whitespace.
+ return LexToken();
+ } else {
+ int len = 1;
+ while (*CurPtr==' ' || *CurPtr=='\t') {
+ CurPtr++;
+ len++;
+ }
+ return AsmToken(AsmToken::Space, StringRef(TokStart, len));
+ }
+ case '\n': // FALL THROUGH.
+ case '\r':
+ isAtStartOfLine = true;
+ return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
+ case ':': return AsmToken(AsmToken::Colon, StringRef(TokStart, 1));
+ case '+': return AsmToken(AsmToken::Plus, StringRef(TokStart, 1));
+ case '-': return AsmToken(AsmToken::Minus, StringRef(TokStart, 1));
+ case '~': return AsmToken(AsmToken::Tilde, StringRef(TokStart, 1));
+ case '(': return AsmToken(AsmToken::LParen, StringRef(TokStart, 1));
+ case ')': return AsmToken(AsmToken::RParen, StringRef(TokStart, 1));
+ case '[': return AsmToken(AsmToken::LBrac, StringRef(TokStart, 1));
+ case ']': return AsmToken(AsmToken::RBrac, StringRef(TokStart, 1));
+ case '{': return AsmToken(AsmToken::LCurly, StringRef(TokStart, 1));
+ case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
+ case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
+ case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
+ case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
+ case '@': return AsmToken(AsmToken::At, StringRef(TokStart, 1));
+ case '\\': return AsmToken(AsmToken::BackSlash, StringRef(TokStart, 1));
+ case '=':
+ if (*CurPtr == '=')
+ return ++CurPtr, AsmToken(AsmToken::EqualEqual, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Equal, StringRef(TokStart, 1));
+ case '|':
+ if (*CurPtr == '|')
+ return ++CurPtr, AsmToken(AsmToken::PipePipe, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Pipe, StringRef(TokStart, 1));
+ case '^': return AsmToken(AsmToken::Caret, StringRef(TokStart, 1));
+ case '&':
+ if (*CurPtr == '&')
+ return ++CurPtr, AsmToken(AsmToken::AmpAmp, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Amp, StringRef(TokStart, 1));
+ case '!':
+ if (*CurPtr == '=')
+ return ++CurPtr, AsmToken(AsmToken::ExclaimEqual, StringRef(TokStart, 2));
+ return AsmToken(AsmToken::Exclaim, StringRef(TokStart, 1));
+ case '%': return AsmToken(AsmToken::Percent, StringRef(TokStart, 1));
+ case '/': return LexSlash();
+ case '#': return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
+ case '\'': return LexSingleQuote();
+ case '"': return LexQuote();
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ return LexDigit();
+ case '<':
+ switch (*CurPtr) {
+ case '<': return ++CurPtr, AsmToken(AsmToken::LessLess,
+ StringRef(TokStart, 2));
+ case '=': return ++CurPtr, AsmToken(AsmToken::LessEqual,
+ StringRef(TokStart, 2));
+ case '>': return ++CurPtr, AsmToken(AsmToken::LessGreater,
+ StringRef(TokStart, 2));
+ default: return AsmToken(AsmToken::Less, StringRef(TokStart, 1));
+ }
+ case '>':
+ switch (*CurPtr) {
+ case '>': return ++CurPtr, AsmToken(AsmToken::GreaterGreater,
+ StringRef(TokStart, 2));
+ case '=': return ++CurPtr, AsmToken(AsmToken::GreaterEqual,
+ StringRef(TokStart, 2));
+ default: return AsmToken(AsmToken::Greater, StringRef(TokStart, 1));
+ }
+
+ // TODO: Quoted identifiers (objc methods etc)
+ // local labels: [0-9][:]
+ // Forward/backward labels: [0-9][fb]
+ // Integers, fp constants, character constants.
+ }
+}
diff --git a/contrib/llvm/lib/MC/MCParser/AsmParser.cpp b/contrib/llvm/lib/MC/MCParser/AsmParser.cpp
new file mode 100644
index 0000000..646cbb4
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -0,0 +1,4987 @@
+//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements the parser for assembly files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCParser/AsmCond.h"
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCParser/MCAsmParserUtils.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cctype>
+#include <deque>
+#include <set>
+#include <string>
+#include <vector>
+using namespace llvm;
+
+MCAsmParserSemaCallback::~MCAsmParserSemaCallback() {}
+
+namespace {
+/// \brief Helper types for tracking macro definitions.
+typedef std::vector<AsmToken> MCAsmMacroArgument;
+typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
+
+struct MCAsmMacroParameter {
+ StringRef Name;
+ MCAsmMacroArgument Value;
+ bool Required;
+ bool Vararg;
+
+ MCAsmMacroParameter() : Required(false), Vararg(false) {}
+};
+
+typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters;
+
+struct MCAsmMacro {
+ StringRef Name;
+ StringRef Body;
+ MCAsmMacroParameters Parameters;
+
+public:
+ MCAsmMacro(StringRef N, StringRef B, MCAsmMacroParameters P)
+ : Name(N), Body(B), Parameters(std::move(P)) {}
+};
+
+/// \brief Helper class for storing information about an active macro
+/// instantiation.
+struct MacroInstantiation {
+ /// The location of the instantiation.
+ SMLoc InstantiationLoc;
+
+ /// The buffer where parsing should resume upon instantiation completion.
+ int ExitBuffer;
+
+ /// The location where parsing should resume upon instantiation completion.
+ SMLoc ExitLoc;
+
+ /// The depth of TheCondStack at the start of the instantiation.
+ size_t CondStackDepth;
+
+public:
+ MacroInstantiation(SMLoc IL, int EB, SMLoc EL, size_t CondStackDepth);
+};
+
+struct ParseStatementInfo {
+ /// \brief The parsed operands from the last parsed statement.
+ SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
+
+ /// \brief The opcode from the last parsed instruction.
+ unsigned Opcode;
+
+ /// \brief Was there an error parsing the inline assembly?
+ bool ParseError;
+
+ SmallVectorImpl<AsmRewrite> *AsmRewrites;
+
+ ParseStatementInfo() : Opcode(~0U), ParseError(false), AsmRewrites(nullptr) {}
+ ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
+ : Opcode(~0), ParseError(false), AsmRewrites(rewrites) {}
+};
+
+/// \brief The concrete assembly parser instance.
+class AsmParser : public MCAsmParser {
+ AsmParser(const AsmParser &) = delete;
+ void operator=(const AsmParser &) = delete;
+private:
+ AsmLexer Lexer;
+ MCContext &Ctx;
+ MCStreamer &Out;
+ const MCAsmInfo &MAI;
+ SourceMgr &SrcMgr;
+ SourceMgr::DiagHandlerTy SavedDiagHandler;
+ void *SavedDiagContext;
+ std::unique_ptr<MCAsmParserExtension> PlatformParser;
+
+ /// This is the current buffer index we're lexing from as managed by the
+ /// SourceMgr object.
+ unsigned CurBuffer;
+
+ AsmCond TheCondState;
+ std::vector<AsmCond> TheCondStack;
+
+ /// \brief maps directive names to handler methods in parser
+ /// extensions. Extensions register themselves in this map by calling
+ /// addDirectiveHandler.
+ StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
+
+ /// \brief Map of currently defined macros.
+ StringMap<MCAsmMacro> MacroMap;
+
+ /// \brief Stack of active macro instantiations.
+ std::vector<MacroInstantiation*> ActiveMacros;
+
+ /// \brief List of bodies of anonymous macros.
+ std::deque<MCAsmMacro> MacroLikeBodies;
+
+ /// Boolean tracking whether macro substitution is enabled.
+ unsigned MacrosEnabledFlag : 1;
+
+ /// \brief Keeps track of how many .macro's have been instantiated.
+ unsigned NumOfMacroInstantiations;
+
+ /// Flag tracking whether any errors have been encountered.
+ unsigned HadError : 1;
+
+ /// The values from the last parsed cpp hash file line comment if any.
+ StringRef CppHashFilename;
+ int64_t CppHashLineNumber;
+ SMLoc CppHashLoc;
+ unsigned CppHashBuf;
+ /// When generating dwarf for assembly source files we need to calculate the
+ /// logical line number based on the last parsed cpp hash file line comment
+ /// and current line. Since this is slow and messes up the SourceMgr's
+ /// cache we save the last info we queried with SrcMgr.FindLineNumber().
+ SMLoc LastQueryIDLoc;
+ unsigned LastQueryBuffer;
+ unsigned LastQueryLine;
+
+ /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
+ unsigned AssemblerDialect;
+
+ /// \brief is Darwin compatibility enabled?
+ bool IsDarwin;
+
+ /// \brief Are we parsing ms-style inline assembly?
+ bool ParsingInlineAsm;
+
+public:
+ AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
+ const MCAsmInfo &MAI);
+ ~AsmParser() override;
+
+ bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
+
+ void addDirectiveHandler(StringRef Directive,
+ ExtensionDirectiveHandler Handler) override {
+ ExtensionDirectiveMap[Directive] = Handler;
+ }
+
+ void addAliasForDirective(StringRef Directive, StringRef Alias) override {
+ DirectiveKindMap[Directive] = DirectiveKindMap[Alias];
+ }
+
+public:
+ /// @name MCAsmParser Interface
+ /// {
+
+ SourceMgr &getSourceManager() override { return SrcMgr; }
+ MCAsmLexer &getLexer() override { return Lexer; }
+ MCContext &getContext() override { return Ctx; }
+ MCStreamer &getStreamer() override { return Out; }
+ unsigned getAssemblerDialect() override {
+ if (AssemblerDialect == ~0U)
+ return MAI.getAssemblerDialect();
+ else
+ return AssemblerDialect;
+ }
+ void setAssemblerDialect(unsigned i) override {
+ AssemblerDialect = i;
+ }
+
+ void Note(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None) override;
+ bool Warning(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None) override;
+ bool Error(SMLoc L, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None) override;
+
+ const AsmToken &Lex() override;
+
+ void setParsingInlineAsm(bool V) override { ParsingInlineAsm = V; }
+ bool isParsingInlineAsm() override { return ParsingInlineAsm; }
+
+ bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
+ unsigned &NumOutputs, unsigned &NumInputs,
+ SmallVectorImpl<std::pair<void *,bool> > &OpDecls,
+ SmallVectorImpl<std::string> &Constraints,
+ SmallVectorImpl<std::string> &Clobbers,
+ const MCInstrInfo *MII, const MCInstPrinter *IP,
+ MCAsmParserSemaCallback &SI) override;
+
+ bool parseExpression(const MCExpr *&Res);
+ bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
+ bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override;
+ bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
+ bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
+ SMLoc &EndLoc) override;
+ bool parseAbsoluteExpression(int64_t &Res) override;
+
+ /// \brief Parse an identifier or string (as a quoted identifier)
+ /// and set \p Res to the identifier contents.
+ bool parseIdentifier(StringRef &Res) override;
+ void eatToEndOfStatement() override;
+
+ void checkForValidSection() override;
+ /// }
+
+private:
+
+ bool parseStatement(ParseStatementInfo &Info,
+ MCAsmParserSemaCallback *SI);
+ void eatToEndOfLine();
+ bool parseCppHashLineFilenameComment(SMLoc L);
+
+ void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
+ ArrayRef<MCAsmMacroParameter> Parameters);
+ bool expandMacro(raw_svector_ostream &OS, StringRef Body,
+ ArrayRef<MCAsmMacroParameter> Parameters,
+ ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
+ SMLoc L);
+
+ /// \brief Are macros enabled in the parser?
+ bool areMacrosEnabled() {return MacrosEnabledFlag;}
+
+ /// \brief Control a flag in the parser that enables or disables macros.
+ void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
+
+ /// \brief Lookup a previously defined macro.
+ /// \param Name Macro name.
+ /// \returns Pointer to macro. NULL if no such macro was defined.
+ const MCAsmMacro* lookupMacro(StringRef Name);
+
+ /// \brief Define a new macro with the given name and information.
+ void defineMacro(StringRef Name, MCAsmMacro Macro);
+
+ /// \brief Undefine a macro. If no such macro was defined, it's a no-op.
+ void undefineMacro(StringRef Name);
+
+ /// \brief Are we inside a macro instantiation?
+ bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
+
+ /// \brief Handle entry to macro instantiation.
+ ///
+ /// \param M The macro.
+ /// \param NameLoc Instantiation location.
+ bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
+
+ /// \brief Handle exit from macro instantiation.
+ void handleMacroExit();
+
+ /// \brief Extract AsmTokens for a macro argument.
+ bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
+
+ /// \brief Parse all macro arguments for a given macro.
+ bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
+
+ void printMacroInstantiations();
+ void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = None) const {
+ SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
+ }
+ static void DiagHandler(const SMDiagnostic &Diag, void *Context);
+
+ /// \brief Enter the specified file. This returns true on failure.
+ bool enterIncludeFile(const std::string &Filename);
+
+ /// \brief Process the specified file for the .incbin directive.
+ /// This returns true on failure.
+ bool processIncbinFile(const std::string &Filename);
+
+ /// \brief Reset the current lexer position to that given by \p Loc. The
+ /// current token is not set; clients should ensure Lex() is called
+ /// subsequently.
+ ///
+ /// \param InBuffer If not 0, should be the known buffer id that contains the
+ /// location.
+ void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
+
+ /// \brief Parse up to the end of statement and a return the contents from the
+ /// current token until the end of the statement; the current token on exit
+ /// will be either the EndOfStatement or EOF.
+ StringRef parseStringToEndOfStatement() override;
+
+ /// \brief Parse until the end of a statement or a comma is encountered,
+ /// return the contents from the current token up to the end or comma.
+ StringRef parseStringToComma();
+
+ bool parseAssignment(StringRef Name, bool allow_redef,
+ bool NoDeadStrip = false);
+
+ unsigned getBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind);
+
+ bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
+ bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
+ bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
+
+ bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
+
+ // Generic (target and platform independent) directive parsing.
+ enum DirectiveKind {
+ DK_NO_DIRECTIVE, // Placeholder
+ DK_SET, DK_EQU, DK_EQUIV, DK_ASCII, DK_ASCIZ, DK_STRING, DK_BYTE, DK_SHORT,
+ DK_RELOC,
+ DK_VALUE, DK_2BYTE, DK_LONG, DK_INT, DK_4BYTE, DK_QUAD, DK_8BYTE, DK_OCTA,
+ DK_SINGLE, DK_FLOAT, DK_DOUBLE, DK_ALIGN, DK_ALIGN32, DK_BALIGN, DK_BALIGNW,
+ DK_BALIGNL, DK_P2ALIGN, DK_P2ALIGNW, DK_P2ALIGNL, DK_ORG, DK_FILL, DK_ENDR,
+ DK_BUNDLE_ALIGN_MODE, DK_BUNDLE_LOCK, DK_BUNDLE_UNLOCK,
+ DK_ZERO, DK_EXTERN, DK_GLOBL, DK_GLOBAL,
+ DK_LAZY_REFERENCE, DK_NO_DEAD_STRIP, DK_SYMBOL_RESOLVER, DK_PRIVATE_EXTERN,
+ DK_REFERENCE, DK_WEAK_DEFINITION, DK_WEAK_REFERENCE,
+ DK_WEAK_DEF_CAN_BE_HIDDEN, DK_COMM, DK_COMMON, DK_LCOMM, DK_ABORT,
+ DK_INCLUDE, DK_INCBIN, DK_CODE16, DK_CODE16GCC, DK_REPT, DK_IRP, DK_IRPC,
+ DK_IF, DK_IFEQ, DK_IFGE, DK_IFGT, DK_IFLE, DK_IFLT, DK_IFNE, DK_IFB,
+ DK_IFNB, DK_IFC, DK_IFEQS, DK_IFNC, DK_IFNES, DK_IFDEF, DK_IFNDEF,
+ DK_IFNOTDEF, DK_ELSEIF, DK_ELSE, DK_ENDIF,
+ DK_SPACE, DK_SKIP, DK_FILE, DK_LINE, DK_LOC, DK_STABS,
+ DK_CFI_SECTIONS, DK_CFI_STARTPROC, DK_CFI_ENDPROC, DK_CFI_DEF_CFA,
+ DK_CFI_DEF_CFA_OFFSET, DK_CFI_ADJUST_CFA_OFFSET, DK_CFI_DEF_CFA_REGISTER,
+ DK_CFI_OFFSET, DK_CFI_REL_OFFSET, DK_CFI_PERSONALITY, DK_CFI_LSDA,
+ DK_CFI_REMEMBER_STATE, DK_CFI_RESTORE_STATE, DK_CFI_SAME_VALUE,
+ DK_CFI_RESTORE, DK_CFI_ESCAPE, DK_CFI_SIGNAL_FRAME, DK_CFI_UNDEFINED,
+ DK_CFI_REGISTER, DK_CFI_WINDOW_SAVE,
+ DK_MACROS_ON, DK_MACROS_OFF,
+ DK_MACRO, DK_EXITM, DK_ENDM, DK_ENDMACRO, DK_PURGEM,
+ DK_SLEB128, DK_ULEB128,
+ DK_ERR, DK_ERROR, DK_WARNING,
+ DK_END
+ };
+
+ /// \brief Maps directive name --> DirectiveKind enum, for
+ /// directives parsed by this class.
+ StringMap<DirectiveKind> DirectiveKindMap;
+
+ // ".ascii", ".asciz", ".string"
+ bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
+ bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
+ bool parseDirectiveValue(unsigned Size); // ".byte", ".long", ...
+ bool parseDirectiveOctaValue(); // ".octa"
+ bool parseDirectiveRealValue(const fltSemantics &); // ".single", ...
+ bool parseDirectiveFill(); // ".fill"
+ bool parseDirectiveZero(); // ".zero"
+ // ".set", ".equ", ".equiv"
+ bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
+ bool parseDirectiveOrg(); // ".org"
+ // ".align{,32}", ".p2align{,w,l}"
+ bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
+
+ // ".file", ".line", ".loc", ".stabs"
+ bool parseDirectiveFile(SMLoc DirectiveLoc);
+ bool parseDirectiveLine();
+ bool parseDirectiveLoc();
+ bool parseDirectiveStabs();
+
+ // .cfi directives
+ bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIWindowSave();
+ bool parseDirectiveCFISections();
+ bool parseDirectiveCFIStartProc();
+ bool parseDirectiveCFIEndProc();
+ bool parseDirectiveCFIDefCfaOffset();
+ bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIAdjustCfaOffset();
+ bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
+ bool parseDirectiveCFIRememberState();
+ bool parseDirectiveCFIRestoreState();
+ bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
+ bool parseDirectiveCFIEscape();
+ bool parseDirectiveCFISignalFrame();
+ bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
+
+ // macro directives
+ bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
+ bool parseDirectiveExitMacro(StringRef Directive);
+ bool parseDirectiveEndMacro(StringRef Directive);
+ bool parseDirectiveMacro(SMLoc DirectiveLoc);
+ bool parseDirectiveMacrosOnOff(StringRef Directive);
+
+ // ".bundle_align_mode"
+ bool parseDirectiveBundleAlignMode();
+ // ".bundle_lock"
+ bool parseDirectiveBundleLock();
+ // ".bundle_unlock"
+ bool parseDirectiveBundleUnlock();
+
+ // ".space", ".skip"
+ bool parseDirectiveSpace(StringRef IDVal);
+
+ // .sleb128 (Signed=true) and .uleb128 (Signed=false)
+ bool parseDirectiveLEB128(bool Signed);
+
+ /// \brief Parse a directive like ".globl" which
+ /// accepts a single symbol (which should be a label or an external).
+ bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
+
+ bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
+
+ bool parseDirectiveAbort(); // ".abort"
+ bool parseDirectiveInclude(); // ".include"
+ bool parseDirectiveIncbin(); // ".incbin"
+
+ // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
+ bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
+ // ".ifb" or ".ifnb", depending on ExpectBlank.
+ bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
+ // ".ifc" or ".ifnc", depending on ExpectEqual.
+ bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
+ // ".ifeqs" or ".ifnes", depending on ExpectEqual.
+ bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
+ // ".ifdef" or ".ifndef", depending on expect_defined
+ bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
+ bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
+ bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
+ bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
+ bool parseEscapedString(std::string &Data) override;
+
+ const MCExpr *applyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant);
+
+ // Macro-like directives
+ MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
+ void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS);
+ bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
+ bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
+ bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
+ bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
+
+ // "_emit" or "__emit"
+ bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
+ size_t Len);
+
+ // "align"
+ bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
+
+ // "end"
+ bool parseDirectiveEnd(SMLoc DirectiveLoc);
+
+ // ".err" or ".error"
+ bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
+
+ // ".warning"
+ bool parseDirectiveWarning(SMLoc DirectiveLoc);
+
+ void initializeDirectiveKindMap();
+};
+}
+
+namespace llvm {
+
+extern MCAsmParserExtension *createDarwinAsmParser();
+extern MCAsmParserExtension *createELFAsmParser();
+extern MCAsmParserExtension *createCOFFAsmParser();
+
+}
+
+enum { DEFAULT_ADDRSPACE = 0 };
+
+AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
+ const MCAsmInfo &MAI)
+ : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
+ PlatformParser(nullptr), CurBuffer(SM.getMainFileID()),
+ MacrosEnabledFlag(true), HadError(false), CppHashLineNumber(0),
+ AssemblerDialect(~0U), IsDarwin(false), ParsingInlineAsm(false) {
+ // Save the old handler.
+ SavedDiagHandler = SrcMgr.getDiagHandler();
+ SavedDiagContext = SrcMgr.getDiagContext();
+ // Set our own handler which calls the saved handler.
+ SrcMgr.setDiagHandler(DiagHandler, this);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
+
+ // Initialize the platform / file format parser.
+ switch (Ctx.getObjectFileInfo()->getObjectFileType()) {
+ case MCObjectFileInfo::IsCOFF:
+ PlatformParser.reset(createCOFFAsmParser());
+ break;
+ case MCObjectFileInfo::IsMachO:
+ PlatformParser.reset(createDarwinAsmParser());
+ IsDarwin = true;
+ break;
+ case MCObjectFileInfo::IsELF:
+ PlatformParser.reset(createELFAsmParser());
+ break;
+ }
+
+ PlatformParser->Initialize(*this);
+ initializeDirectiveKindMap();
+
+ NumOfMacroInstantiations = 0;
+}
+
+AsmParser::~AsmParser() {
+ assert((HadError || ActiveMacros.empty()) &&
+ "Unexpected active macro instantiation!");
+}
+
+void AsmParser::printMacroInstantiations() {
+ // Print the active macro instantiation stack.
+ for (std::vector<MacroInstantiation *>::const_reverse_iterator
+ it = ActiveMacros.rbegin(),
+ ie = ActiveMacros.rend();
+ it != ie; ++it)
+ printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
+ "while in macro instantiation");
+}
+
+void AsmParser::Note(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ printMessage(L, SourceMgr::DK_Note, Msg, Ranges);
+ printMacroInstantiations();
+}
+
+bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ if(getTargetParser().getTargetOptions().MCNoWarn)
+ return false;
+ if (getTargetParser().getTargetOptions().MCFatalWarnings)
+ return Error(L, Msg, Ranges);
+ printMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
+ printMacroInstantiations();
+ return false;
+}
+
+bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ HadError = true;
+ printMessage(L, SourceMgr::DK_Error, Msg, Ranges);
+ printMacroInstantiations();
+ return true;
+}
+
+bool AsmParser::enterIncludeFile(const std::string &Filename) {
+ std::string IncludedFile;
+ unsigned NewBuf =
+ SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (!NewBuf)
+ return true;
+
+ CurBuffer = NewBuf;
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
+ return false;
+}
+
+/// Process the specified .incbin file by searching for it in the include paths
+/// then just emitting the byte contents of the file to the streamer. This
+/// returns true on failure.
+bool AsmParser::processIncbinFile(const std::string &Filename) {
+ std::string IncludedFile;
+ unsigned NewBuf =
+ SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (!NewBuf)
+ return true;
+
+ // Pick up the bytes from the file and emit them.
+ getStreamer().EmitBytes(SrcMgr.getMemoryBuffer(NewBuf)->getBuffer());
+ return false;
+}
+
+void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
+ CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
+ Loc.getPointer());
+}
+
+const AsmToken &AsmParser::Lex() {
+ const AsmToken *tok = &Lexer.Lex();
+
+ if (tok->is(AsmToken::Eof)) {
+ // If this is the end of an included file, pop the parent file off the
+ // include stack.
+ SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
+ if (ParentIncludeLoc != SMLoc()) {
+ jumpToLoc(ParentIncludeLoc);
+ tok = &Lexer.Lex();
+ }
+ }
+
+ if (tok->is(AsmToken::Error))
+ Error(Lexer.getErrLoc(), Lexer.getErr());
+
+ return *tok;
+}
+
+bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
+ // Create the initial section, if requested.
+ if (!NoInitialTextSection)
+ Out.InitSections(false);
+
+ // Prime the lexer.
+ Lex();
+
+ HadError = false;
+ AsmCond StartingCondState = TheCondState;
+
+ // If we are generating dwarf for assembly source files save the initial text
+ // section and generate a .file directive.
+ if (getContext().getGenDwarfForAssembly()) {
+ MCSection *Sec = getStreamer().getCurrentSection().first;
+ if (!Sec->getBeginSymbol()) {
+ MCSymbol *SectionStartSym = getContext().createTempSymbol();
+ getStreamer().EmitLabel(SectionStartSym);
+ Sec->setBeginSymbol(SectionStartSym);
+ }
+ bool InsertResult = getContext().addGenDwarfSection(Sec);
+ assert(InsertResult && ".text section should not have debug info yet");
+ (void)InsertResult;
+ getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective(
+ 0, StringRef(), getContext().getMainFileName()));
+ }
+
+ // While we have input, parse each statement.
+ while (Lexer.isNot(AsmToken::Eof)) {
+ ParseStatementInfo Info;
+ if (!parseStatement(Info, nullptr))
+ continue;
+
+ // We had an error, validate that one was emitted and recover by skipping to
+ // the next line.
+ assert(HadError && "Parse statement returned an error, but none emitted!");
+ eatToEndOfStatement();
+ }
+
+ if (TheCondState.TheCond != StartingCondState.TheCond ||
+ TheCondState.Ignore != StartingCondState.Ignore)
+ return TokError("unmatched .ifs or .elses");
+
+ // Check to see there are no empty DwarfFile slots.
+ const auto &LineTables = getContext().getMCDwarfLineTables();
+ if (!LineTables.empty()) {
+ unsigned Index = 0;
+ for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
+ if (File.Name.empty() && Index != 0)
+ TokError("unassigned file number: " + Twine(Index) +
+ " for .file directives");
+ ++Index;
+ }
+ }
+
+ // Check to see that all assembler local symbols were actually defined.
+ // Targets that don't do subsections via symbols may not want this, though,
+ // so conservatively exclude them. Only do this if we're finalizing, though,
+ // as otherwise we won't necessarilly have seen everything yet.
+ if (!NoFinalize && MAI.hasSubsectionsViaSymbols()) {
+ for (const auto &TableEntry : getContext().getSymbols()) {
+ MCSymbol *Sym = TableEntry.getValue();
+ // Variable symbols may not be marked as defined, so check those
+ // explicitly. If we know it's a variable, we have a definition for
+ // the purposes of this check.
+ if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
+ // FIXME: We would really like to refer back to where the symbol was
+ // first referenced for a source location. We need to add something
+ // to track that. Currently, we just point to the end of the file.
+ return Error(getLexer().getLoc(), "assembler local symbol '" +
+ Sym->getName() + "' not defined");
+ }
+ }
+
+ // Finalize the output stream if there are no errors and if the client wants
+ // us to.
+ if (!HadError && !NoFinalize)
+ Out.Finish();
+
+ return HadError || getContext().hadError();
+}
+
+void AsmParser::checkForValidSection() {
+ if (!ParsingInlineAsm && !getStreamer().getCurrentSection().first) {
+ TokError("expected section directive before assembly directive");
+ Out.InitSections(false);
+ }
+}
+
+/// \brief Throw away the rest of the line for testing purposes.
+void AsmParser::eatToEndOfStatement() {
+ while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ // Eat EOL.
+ if (Lexer.is(AsmToken::EndOfStatement))
+ Lex();
+}
+
+StringRef AsmParser::parseStringToEndOfStatement() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
+StringRef AsmParser::parseStringToComma() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
+/// \brief Parse a paren expression and return it.
+/// NOTE: This assumes the leading '(' has already been consumed.
+///
+/// parenexpr ::= expr)
+///
+bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ if (parseExpression(Res))
+ return true;
+ if (Lexer.isNot(AsmToken::RParen))
+ return TokError("expected ')' in parentheses expression");
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex();
+ return false;
+}
+
+/// \brief Parse a bracket expression and return it.
+/// NOTE: This assumes the leading '[' has already been consumed.
+///
+/// bracketexpr ::= expr]
+///
+bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ if (parseExpression(Res))
+ return true;
+ if (Lexer.isNot(AsmToken::RBrac))
+ return TokError("expected ']' in brackets expression");
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex();
+ return false;
+}
+
+/// \brief Parse a primary expression and return it.
+/// primaryexpr ::= (parenexpr
+/// primaryexpr ::= symbol
+/// primaryexpr ::= number
+/// primaryexpr ::= '.'
+/// primaryexpr ::= ~,+,- primaryexpr
+bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
+ SMLoc FirstTokenLoc = getLexer().getLoc();
+ AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
+ switch (FirstTokenKind) {
+ default:
+ return TokError("unknown token in expression");
+ // If we have an error assume that we've already handled it.
+ case AsmToken::Error:
+ return true;
+ case AsmToken::Exclaim:
+ Lex(); // Eat the operator.
+ if (parsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::createLNot(Res, getContext());
+ return false;
+ case AsmToken::Dollar:
+ case AsmToken::At:
+ case AsmToken::String:
+ case AsmToken::Identifier: {
+ StringRef Identifier;
+ if (parseIdentifier(Identifier)) {
+ if (FirstTokenKind == AsmToken::Dollar) {
+ if (Lexer.getMAI().getDollarIsPC()) {
+ // This is a '$' reference, which references the current PC. Emit a
+ // temporary label to the streamer and refer to it.
+ MCSymbol *Sym = Ctx.createTempSymbol();
+ Out.EmitLabel(Sym);
+ Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
+ getContext());
+ EndLoc = FirstTokenLoc;
+ return false;
+ }
+ return Error(FirstTokenLoc, "invalid token in expression");
+ }
+ }
+ // Parse symbol variant
+ std::pair<StringRef, StringRef> Split;
+ if (!MAI.useParensForSymbolVariant()) {
+ if (FirstTokenKind == AsmToken::String) {
+ if (Lexer.is(AsmToken::At)) {
+ Lexer.Lex(); // eat @
+ SMLoc AtLoc = getLexer().getLoc();
+ StringRef VName;
+ if (parseIdentifier(VName))
+ return Error(AtLoc, "expected symbol variant after '@'");
+
+ Split = std::make_pair(Identifier, VName);
+ }
+ } else {
+ Split = Identifier.split('@');
+ }
+ } else if (Lexer.is(AsmToken::LParen)) {
+ Lexer.Lex(); // eat (
+ StringRef VName;
+ parseIdentifier(VName);
+ if (Lexer.isNot(AsmToken::RParen)) {
+ return Error(Lexer.getTok().getLoc(),
+ "unexpected token in variant, expected ')'");
+ }
+ Lexer.Lex(); // eat )
+ Split = std::make_pair(Identifier, VName);
+ }
+
+ EndLoc = SMLoc::getFromPointer(Identifier.end());
+
+ // This is a symbol reference.
+ StringRef SymbolName = Identifier;
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+
+ // Lookup the symbol variant if used.
+ if (Split.second.size()) {
+ Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
+ if (Variant != MCSymbolRefExpr::VK_Invalid) {
+ SymbolName = Split.first;
+ } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
+ Variant = MCSymbolRefExpr::VK_None;
+ } else {
+ return Error(SMLoc::getFromPointer(Split.second.begin()),
+ "invalid variant '" + Split.second + "'");
+ }
+ }
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName);
+
+ // If this is an absolute variable reference, substitute it now to preserve
+ // semantics in the face of reassignment.
+ if (Sym->isVariable() &&
+ isa<MCConstantExpr>(Sym->getVariableValue(/*SetUsed*/ false))) {
+ if (Variant)
+ return Error(EndLoc, "unexpected modifier on variable reference");
+
+ Res = Sym->getVariableValue(/*SetUsed*/ false);
+ return false;
+ }
+
+ // Otherwise create a symbol ref.
+ Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
+ return false;
+ }
+ case AsmToken::BigNum:
+ return TokError("literal value out of range for directive");
+ case AsmToken::Integer: {
+ SMLoc Loc = getTok().getLoc();
+ int64_t IntVal = getTok().getIntVal();
+ Res = MCConstantExpr::create(IntVal, getContext());
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex(); // Eat token.
+ // Look for 'b' or 'f' following an Integer as a directional label
+ if (Lexer.getKind() == AsmToken::Identifier) {
+ StringRef IDVal = getTok().getString();
+ // Lookup the symbol variant if used.
+ std::pair<StringRef, StringRef> Split = IDVal.split('@');
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ if (Split.first.size() != IDVal.size()) {
+ Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
+ if (Variant == MCSymbolRefExpr::VK_Invalid)
+ return TokError("invalid variant '" + Split.second + "'");
+ IDVal = Split.first;
+ }
+ if (IDVal == "f" || IDVal == "b") {
+ MCSymbol *Sym =
+ Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
+ Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
+ if (IDVal == "b" && Sym->isUndefined())
+ return Error(Loc, "invalid reference to undefined symbol");
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex(); // Eat identifier.
+ }
+ }
+ return false;
+ }
+ case AsmToken::Real: {
+ APFloat RealVal(APFloat::IEEEdouble, getTok().getString());
+ uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
+ Res = MCConstantExpr::create(IntVal, getContext());
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex(); // Eat token.
+ return false;
+ }
+ case AsmToken::Dot: {
+ // This is a '.' reference, which references the current PC. Emit a
+ // temporary label to the streamer and refer to it.
+ MCSymbol *Sym = Ctx.createTempSymbol();
+ Out.EmitLabel(Sym);
+ Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex(); // Eat identifier.
+ return false;
+ }
+ case AsmToken::LParen:
+ Lex(); // Eat the '('.
+ return parseParenExpr(Res, EndLoc);
+ case AsmToken::LBrac:
+ if (!PlatformParser->HasBracketExpressions())
+ return TokError("brackets expression not supported on this target");
+ Lex(); // Eat the '['.
+ return parseBracketExpr(Res, EndLoc);
+ case AsmToken::Minus:
+ Lex(); // Eat the operator.
+ if (parsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::createMinus(Res, getContext());
+ return false;
+ case AsmToken::Plus:
+ Lex(); // Eat the operator.
+ if (parsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::createPlus(Res, getContext());
+ return false;
+ case AsmToken::Tilde:
+ Lex(); // Eat the operator.
+ if (parsePrimaryExpr(Res, EndLoc))
+ return true;
+ Res = MCUnaryExpr::createNot(Res, getContext());
+ return false;
+ }
+}
+
+bool AsmParser::parseExpression(const MCExpr *&Res) {
+ SMLoc EndLoc;
+ return parseExpression(Res, EndLoc);
+}
+
+const MCExpr *
+AsmParser::applyModifierToExpr(const MCExpr *E,
+ MCSymbolRefExpr::VariantKind Variant) {
+ // Ask the target implementation about this expression first.
+ const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
+ if (NewE)
+ return NewE;
+ // Recurse over the given expression, rebuilding it to apply the given variant
+ // if there is exactly one symbol.
+ switch (E->getKind()) {
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return nullptr;
+
+ case MCExpr::SymbolRef: {
+ const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
+
+ if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
+ TokError("invalid variant on expression '" + getTok().getIdentifier() +
+ "' (already modified)");
+ return E;
+ }
+
+ return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
+ }
+
+ case MCExpr::Unary: {
+ const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
+ const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
+ if (!Sub)
+ return nullptr;
+ return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
+ }
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
+ const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
+ const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
+
+ if (!LHS && !RHS)
+ return nullptr;
+
+ if (!LHS)
+ LHS = BE->getLHS();
+ if (!RHS)
+ RHS = BE->getRHS();
+
+ return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
+ }
+ }
+
+ llvm_unreachable("Invalid expression kind!");
+}
+
+/// \brief Parse an expression and return it.
+///
+/// expr ::= expr &&,|| expr -> lowest.
+/// expr ::= expr |,^,&,! expr
+/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
+/// expr ::= expr <<,>> expr
+/// expr ::= expr +,- expr
+/// expr ::= expr *,/,% expr -> highest.
+/// expr ::= primaryexpr
+///
+bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
+ // Parse the expression.
+ Res = nullptr;
+ if (parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc))
+ return true;
+
+ // As a special case, we support 'a op b @ modifier' by rewriting the
+ // expression to include the modifier. This is inefficient, but in general we
+ // expect users to use 'a@modifier op b'.
+ if (Lexer.getKind() == AsmToken::At) {
+ Lex();
+
+ if (Lexer.isNot(AsmToken::Identifier))
+ return TokError("unexpected symbol modifier following '@'");
+
+ MCSymbolRefExpr::VariantKind Variant =
+ MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
+ if (Variant == MCSymbolRefExpr::VK_Invalid)
+ return TokError("invalid variant '" + getTok().getIdentifier() + "'");
+
+ const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
+ if (!ModifiedRes) {
+ return TokError("invalid modifier '" + getTok().getIdentifier() +
+ "' (no symbols present)");
+ }
+
+ Res = ModifiedRes;
+ Lex();
+ }
+
+ // Try to constant fold it up front, if possible.
+ int64_t Value;
+ if (Res->evaluateAsAbsolute(Value))
+ Res = MCConstantExpr::create(Value, getContext());
+
+ return false;
+}
+
+bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
+ Res = nullptr;
+ return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
+}
+
+bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
+ SMLoc &EndLoc) {
+ if (parseParenExpr(Res, EndLoc))
+ return true;
+
+ for (; ParenDepth > 0; --ParenDepth) {
+ if (parseBinOpRHS(1, Res, EndLoc))
+ return true;
+
+ // We don't Lex() the last RParen.
+ // This is the same behavior as parseParenExpression().
+ if (ParenDepth - 1 > 0) {
+ if (Lexer.isNot(AsmToken::RParen))
+ return TokError("expected ')' in parentheses expression");
+ EndLoc = Lexer.getTok().getEndLoc();
+ Lex();
+ }
+ }
+ return false;
+}
+
+bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
+ const MCExpr *Expr;
+
+ SMLoc StartLoc = Lexer.getLoc();
+ if (parseExpression(Expr))
+ return true;
+
+ if (!Expr->evaluateAsAbsolute(Res))
+ return Error(StartLoc, "expected absolute expression");
+
+ return false;
+}
+
+static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind,
+ bool ShouldUseLogicalShr) {
+ switch (K) {
+ default:
+ return 0; // not a binop.
+
+ // Lowest Precedence: &&, ||
+ case AsmToken::AmpAmp:
+ Kind = MCBinaryExpr::LAnd;
+ return 1;
+ case AsmToken::PipePipe:
+ Kind = MCBinaryExpr::LOr;
+ return 1;
+
+ // Low Precedence: |, &, ^
+ //
+ // FIXME: gas seems to support '!' as an infix operator?
+ case AsmToken::Pipe:
+ Kind = MCBinaryExpr::Or;
+ return 2;
+ case AsmToken::Caret:
+ Kind = MCBinaryExpr::Xor;
+ return 2;
+ case AsmToken::Amp:
+ Kind = MCBinaryExpr::And;
+ return 2;
+
+ // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
+ case AsmToken::EqualEqual:
+ Kind = MCBinaryExpr::EQ;
+ return 3;
+ case AsmToken::ExclaimEqual:
+ case AsmToken::LessGreater:
+ Kind = MCBinaryExpr::NE;
+ return 3;
+ case AsmToken::Less:
+ Kind = MCBinaryExpr::LT;
+ return 3;
+ case AsmToken::LessEqual:
+ Kind = MCBinaryExpr::LTE;
+ return 3;
+ case AsmToken::Greater:
+ Kind = MCBinaryExpr::GT;
+ return 3;
+ case AsmToken::GreaterEqual:
+ Kind = MCBinaryExpr::GTE;
+ return 3;
+
+ // Intermediate Precedence: <<, >>
+ case AsmToken::LessLess:
+ Kind = MCBinaryExpr::Shl;
+ return 4;
+ case AsmToken::GreaterGreater:
+ Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
+ return 4;
+
+ // High Intermediate Precedence: +, -
+ case AsmToken::Plus:
+ Kind = MCBinaryExpr::Add;
+ return 5;
+ case AsmToken::Minus:
+ Kind = MCBinaryExpr::Sub;
+ return 5;
+
+ // Highest Precedence: *, /, %
+ case AsmToken::Star:
+ Kind = MCBinaryExpr::Mul;
+ return 6;
+ case AsmToken::Slash:
+ Kind = MCBinaryExpr::Div;
+ return 6;
+ case AsmToken::Percent:
+ Kind = MCBinaryExpr::Mod;
+ return 6;
+ }
+}
+
+static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind,
+ bool ShouldUseLogicalShr) {
+ switch (K) {
+ default:
+ return 0; // not a binop.
+
+ // Lowest Precedence: &&, ||
+ case AsmToken::AmpAmp:
+ Kind = MCBinaryExpr::LAnd;
+ return 2;
+ case AsmToken::PipePipe:
+ Kind = MCBinaryExpr::LOr;
+ return 1;
+
+ // Low Precedence: ==, !=, <>, <, <=, >, >=
+ case AsmToken::EqualEqual:
+ Kind = MCBinaryExpr::EQ;
+ return 3;
+ case AsmToken::ExclaimEqual:
+ case AsmToken::LessGreater:
+ Kind = MCBinaryExpr::NE;
+ return 3;
+ case AsmToken::Less:
+ Kind = MCBinaryExpr::LT;
+ return 3;
+ case AsmToken::LessEqual:
+ Kind = MCBinaryExpr::LTE;
+ return 3;
+ case AsmToken::Greater:
+ Kind = MCBinaryExpr::GT;
+ return 3;
+ case AsmToken::GreaterEqual:
+ Kind = MCBinaryExpr::GTE;
+ return 3;
+
+ // Low Intermediate Precedence: +, -
+ case AsmToken::Plus:
+ Kind = MCBinaryExpr::Add;
+ return 4;
+ case AsmToken::Minus:
+ Kind = MCBinaryExpr::Sub;
+ return 4;
+
+ // High Intermediate Precedence: |, &, ^
+ //
+ // FIXME: gas seems to support '!' as an infix operator?
+ case AsmToken::Pipe:
+ Kind = MCBinaryExpr::Or;
+ return 5;
+ case AsmToken::Caret:
+ Kind = MCBinaryExpr::Xor;
+ return 5;
+ case AsmToken::Amp:
+ Kind = MCBinaryExpr::And;
+ return 5;
+
+ // Highest Precedence: *, /, %, <<, >>
+ case AsmToken::Star:
+ Kind = MCBinaryExpr::Mul;
+ return 6;
+ case AsmToken::Slash:
+ Kind = MCBinaryExpr::Div;
+ return 6;
+ case AsmToken::Percent:
+ Kind = MCBinaryExpr::Mod;
+ return 6;
+ case AsmToken::LessLess:
+ Kind = MCBinaryExpr::Shl;
+ return 6;
+ case AsmToken::GreaterGreater:
+ Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
+ return 6;
+ }
+}
+
+unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
+ MCBinaryExpr::Opcode &Kind) {
+ bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
+ return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
+ : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr);
+}
+
+/// \brief Parse all binary operators with precedence >= 'Precedence'.
+/// Res contains the LHS of the expression on input.
+bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
+ SMLoc &EndLoc) {
+ while (1) {
+ MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
+ unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
+
+ // If the next token is lower precedence than we are allowed to eat, return
+ // successfully with what we ate already.
+ if (TokPrec < Precedence)
+ return false;
+
+ Lex();
+
+ // Eat the next primary expression.
+ const MCExpr *RHS;
+ if (parsePrimaryExpr(RHS, EndLoc))
+ return true;
+
+ // If BinOp binds less tightly with RHS than the operator after RHS, let
+ // the pending operator take RHS as its LHS.
+ MCBinaryExpr::Opcode Dummy;
+ unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
+ if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
+ return true;
+
+ // Merge LHS and RHS according to operator.
+ Res = MCBinaryExpr::create(Kind, Res, RHS, getContext());
+ }
+}
+
+/// ParseStatement:
+/// ::= EndOfStatement
+/// ::= Label* Directive ...Operands... EndOfStatement
+/// ::= Label* Identifier OperandList* EndOfStatement
+bool AsmParser::parseStatement(ParseStatementInfo &Info,
+ MCAsmParserSemaCallback *SI) {
+ if (Lexer.is(AsmToken::EndOfStatement)) {
+ Out.AddBlankLine();
+ Lex();
+ return false;
+ }
+
+ // Statements always start with an identifier or are a full line comment.
+ AsmToken ID = getTok();
+ SMLoc IDLoc = ID.getLoc();
+ StringRef IDVal;
+ int64_t LocalLabelVal = -1;
+ // A full line comment is a '#' as the first token.
+ if (Lexer.is(AsmToken::Hash))
+ return parseCppHashLineFilenameComment(IDLoc);
+
+ // Allow an integer followed by a ':' as a directional local label.
+ if (Lexer.is(AsmToken::Integer)) {
+ LocalLabelVal = getTok().getIntVal();
+ if (LocalLabelVal < 0) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ IDVal = "";
+ } else {
+ IDVal = getTok().getString();
+ Lex(); // Consume the integer token to be used as an identifier token.
+ if (Lexer.getKind() != AsmToken::Colon) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ }
+ }
+ } else if (Lexer.is(AsmToken::Dot)) {
+ // Treat '.' as a valid identifier in this context.
+ Lex();
+ IDVal = ".";
+ } else if (Lexer.is(AsmToken::LCurly)) {
+ // Treat '{' as a valid identifier in this context.
+ Lex();
+ IDVal = "{";
+
+ } else if (Lexer.is(AsmToken::RCurly)) {
+ // Treat '}' as a valid identifier in this context.
+ Lex();
+ IDVal = "}";
+ } else if (parseIdentifier(IDVal)) {
+ if (!TheCondState.Ignore)
+ return TokError("unexpected token at start of statement");
+ IDVal = "";
+ }
+
+ // Handle conditional assembly here before checking for skipping. We
+ // have to do this so that .endif isn't skipped in a ".if 0" block for
+ // example.
+ StringMap<DirectiveKind>::const_iterator DirKindIt =
+ DirectiveKindMap.find(IDVal);
+ DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
+ ? DK_NO_DIRECTIVE
+ : DirKindIt->getValue();
+ switch (DirKind) {
+ default:
+ break;
+ case DK_IF:
+ case DK_IFEQ:
+ case DK_IFGE:
+ case DK_IFGT:
+ case DK_IFLE:
+ case DK_IFLT:
+ case DK_IFNE:
+ return parseDirectiveIf(IDLoc, DirKind);
+ case DK_IFB:
+ return parseDirectiveIfb(IDLoc, true);
+ case DK_IFNB:
+ return parseDirectiveIfb(IDLoc, false);
+ case DK_IFC:
+ return parseDirectiveIfc(IDLoc, true);
+ case DK_IFEQS:
+ return parseDirectiveIfeqs(IDLoc, true);
+ case DK_IFNC:
+ return parseDirectiveIfc(IDLoc, false);
+ case DK_IFNES:
+ return parseDirectiveIfeqs(IDLoc, false);
+ case DK_IFDEF:
+ return parseDirectiveIfdef(IDLoc, true);
+ case DK_IFNDEF:
+ case DK_IFNOTDEF:
+ return parseDirectiveIfdef(IDLoc, false);
+ case DK_ELSEIF:
+ return parseDirectiveElseIf(IDLoc);
+ case DK_ELSE:
+ return parseDirectiveElse(IDLoc);
+ case DK_ENDIF:
+ return parseDirectiveEndIf(IDLoc);
+ }
+
+ // Ignore the statement if in the middle of inactive conditional
+ // (e.g. ".if 0").
+ if (TheCondState.Ignore) {
+ eatToEndOfStatement();
+ return false;
+ }
+
+ // FIXME: Recurse on local labels?
+
+ // See what kind of statement we have.
+ switch (Lexer.getKind()) {
+ case AsmToken::Colon: {
+ if (!getTargetParser().isLabel(ID))
+ break;
+ checkForValidSection();
+
+ // identifier ':' -> Label.
+ Lex();
+
+ // Diagnose attempt to use '.' as a label.
+ if (IDVal == ".")
+ return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
+
+ // Diagnose attempt to use a variable as a label.
+ //
+ // FIXME: Diagnostics. Note the location of the definition as a label.
+ // FIXME: This doesn't diagnose assignment to a symbol which has been
+ // implicitly marked as external.
+ MCSymbol *Sym;
+ if (LocalLabelVal == -1) {
+ if (ParsingInlineAsm && SI) {
+ StringRef RewrittenLabel =
+ SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
+ assert(RewrittenLabel.size() &&
+ "We should have an internal name here.");
+ Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
+ RewrittenLabel);
+ IDVal = RewrittenLabel;
+ }
+ Sym = getContext().getOrCreateSymbol(IDVal);
+ } else
+ Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
+
+ Sym->redefineIfPossible();
+
+ if (!Sym->isUndefined() || Sym->isVariable())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // Emit the label.
+ if (!ParsingInlineAsm)
+ Out.EmitLabel(Sym);
+
+ // If we are generating dwarf for assembly source files then gather the
+ // info to make a dwarf label entry for this label if needed.
+ if (getContext().getGenDwarfForAssembly())
+ MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
+ IDLoc);
+
+ getTargetParser().onLabelParsed(Sym);
+
+ // Consume any end of statement token, if present, to avoid spurious
+ // AddBlankLine calls().
+ if (Lexer.is(AsmToken::EndOfStatement)) {
+ Lex();
+ if (Lexer.is(AsmToken::Eof))
+ return false;
+ }
+
+ return false;
+ }
+
+ case AsmToken::Equal:
+ if (!getTargetParser().equalIsAsmAssignment())
+ break;
+ // identifier '=' ... -> assignment statement
+ Lex();
+
+ return parseAssignment(IDVal, true);
+
+ default: // Normal instruction or directive.
+ break;
+ }
+
+ // If macros are enabled, check to see if this is a macro instantiation.
+ if (areMacrosEnabled())
+ if (const MCAsmMacro *M = lookupMacro(IDVal)) {
+ return handleMacroEntry(M, IDLoc);
+ }
+
+ // Otherwise, we have a normal instruction or directive.
+
+ // Directives start with "."
+ if (IDVal[0] == '.' && IDVal != ".") {
+ // There are several entities interested in parsing directives:
+ //
+ // 1. The target-specific assembly parser. Some directives are target
+ // specific or may potentially behave differently on certain targets.
+ // 2. Asm parser extensions. For example, platform-specific parsers
+ // (like the ELF parser) register themselves as extensions.
+ // 3. The generic directive parser implemented by this class. These are
+ // all the directives that behave in a target and platform independent
+ // manner, or at least have a default behavior that's shared between
+ // all targets and platforms.
+
+ // First query the target-specific parser. It will return 'true' if it
+ // isn't interested in this directive.
+ if (!getTargetParser().ParseDirective(ID))
+ return false;
+
+ // Next, check the extension directive map to see if any extension has
+ // registered itself to parse this directive.
+ std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
+ ExtensionDirectiveMap.lookup(IDVal);
+ if (Handler.first)
+ return (*Handler.second)(Handler.first, IDVal, IDLoc);
+
+ // Finally, if no one else is interested in this directive, it must be
+ // generic and familiar to this class.
+ switch (DirKind) {
+ default:
+ break;
+ case DK_SET:
+ case DK_EQU:
+ return parseDirectiveSet(IDVal, true);
+ case DK_EQUIV:
+ return parseDirectiveSet(IDVal, false);
+ case DK_ASCII:
+ return parseDirectiveAscii(IDVal, false);
+ case DK_ASCIZ:
+ case DK_STRING:
+ return parseDirectiveAscii(IDVal, true);
+ case DK_BYTE:
+ return parseDirectiveValue(1);
+ case DK_SHORT:
+ case DK_VALUE:
+ case DK_2BYTE:
+ return parseDirectiveValue(2);
+ case DK_LONG:
+ case DK_INT:
+ case DK_4BYTE:
+ return parseDirectiveValue(4);
+ case DK_QUAD:
+ case DK_8BYTE:
+ return parseDirectiveValue(8);
+ case DK_OCTA:
+ return parseDirectiveOctaValue();
+ case DK_SINGLE:
+ case DK_FLOAT:
+ return parseDirectiveRealValue(APFloat::IEEEsingle);
+ case DK_DOUBLE:
+ return parseDirectiveRealValue(APFloat::IEEEdouble);
+ case DK_ALIGN: {
+ bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
+ return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
+ }
+ case DK_ALIGN32: {
+ bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
+ return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
+ }
+ case DK_BALIGN:
+ return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
+ case DK_BALIGNW:
+ return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
+ case DK_BALIGNL:
+ return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
+ case DK_P2ALIGN:
+ return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
+ case DK_P2ALIGNW:
+ return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
+ case DK_P2ALIGNL:
+ return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
+ case DK_ORG:
+ return parseDirectiveOrg();
+ case DK_FILL:
+ return parseDirectiveFill();
+ case DK_ZERO:
+ return parseDirectiveZero();
+ case DK_EXTERN:
+ eatToEndOfStatement(); // .extern is the default, ignore it.
+ return false;
+ case DK_GLOBL:
+ case DK_GLOBAL:
+ return parseDirectiveSymbolAttribute(MCSA_Global);
+ case DK_LAZY_REFERENCE:
+ return parseDirectiveSymbolAttribute(MCSA_LazyReference);
+ case DK_NO_DEAD_STRIP:
+ return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
+ case DK_SYMBOL_RESOLVER:
+ return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
+ case DK_PRIVATE_EXTERN:
+ return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
+ case DK_REFERENCE:
+ return parseDirectiveSymbolAttribute(MCSA_Reference);
+ case DK_WEAK_DEFINITION:
+ return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
+ case DK_WEAK_REFERENCE:
+ return parseDirectiveSymbolAttribute(MCSA_WeakReference);
+ case DK_WEAK_DEF_CAN_BE_HIDDEN:
+ return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
+ case DK_COMM:
+ case DK_COMMON:
+ return parseDirectiveComm(/*IsLocal=*/false);
+ case DK_LCOMM:
+ return parseDirectiveComm(/*IsLocal=*/true);
+ case DK_ABORT:
+ return parseDirectiveAbort();
+ case DK_INCLUDE:
+ return parseDirectiveInclude();
+ case DK_INCBIN:
+ return parseDirectiveIncbin();
+ case DK_CODE16:
+ case DK_CODE16GCC:
+ return TokError(Twine(IDVal) + " not supported yet");
+ case DK_REPT:
+ return parseDirectiveRept(IDLoc, IDVal);
+ case DK_IRP:
+ return parseDirectiveIrp(IDLoc);
+ case DK_IRPC:
+ return parseDirectiveIrpc(IDLoc);
+ case DK_ENDR:
+ return parseDirectiveEndr(IDLoc);
+ case DK_BUNDLE_ALIGN_MODE:
+ return parseDirectiveBundleAlignMode();
+ case DK_BUNDLE_LOCK:
+ return parseDirectiveBundleLock();
+ case DK_BUNDLE_UNLOCK:
+ return parseDirectiveBundleUnlock();
+ case DK_SLEB128:
+ return parseDirectiveLEB128(true);
+ case DK_ULEB128:
+ return parseDirectiveLEB128(false);
+ case DK_SPACE:
+ case DK_SKIP:
+ return parseDirectiveSpace(IDVal);
+ case DK_FILE:
+ return parseDirectiveFile(IDLoc);
+ case DK_LINE:
+ return parseDirectiveLine();
+ case DK_LOC:
+ return parseDirectiveLoc();
+ case DK_STABS:
+ return parseDirectiveStabs();
+ case DK_CFI_SECTIONS:
+ return parseDirectiveCFISections();
+ case DK_CFI_STARTPROC:
+ return parseDirectiveCFIStartProc();
+ case DK_CFI_ENDPROC:
+ return parseDirectiveCFIEndProc();
+ case DK_CFI_DEF_CFA:
+ return parseDirectiveCFIDefCfa(IDLoc);
+ case DK_CFI_DEF_CFA_OFFSET:
+ return parseDirectiveCFIDefCfaOffset();
+ case DK_CFI_ADJUST_CFA_OFFSET:
+ return parseDirectiveCFIAdjustCfaOffset();
+ case DK_CFI_DEF_CFA_REGISTER:
+ return parseDirectiveCFIDefCfaRegister(IDLoc);
+ case DK_CFI_OFFSET:
+ return parseDirectiveCFIOffset(IDLoc);
+ case DK_CFI_REL_OFFSET:
+ return parseDirectiveCFIRelOffset(IDLoc);
+ case DK_CFI_PERSONALITY:
+ return parseDirectiveCFIPersonalityOrLsda(true);
+ case DK_CFI_LSDA:
+ return parseDirectiveCFIPersonalityOrLsda(false);
+ case DK_CFI_REMEMBER_STATE:
+ return parseDirectiveCFIRememberState();
+ case DK_CFI_RESTORE_STATE:
+ return parseDirectiveCFIRestoreState();
+ case DK_CFI_SAME_VALUE:
+ return parseDirectiveCFISameValue(IDLoc);
+ case DK_CFI_RESTORE:
+ return parseDirectiveCFIRestore(IDLoc);
+ case DK_CFI_ESCAPE:
+ return parseDirectiveCFIEscape();
+ case DK_CFI_SIGNAL_FRAME:
+ return parseDirectiveCFISignalFrame();
+ case DK_CFI_UNDEFINED:
+ return parseDirectiveCFIUndefined(IDLoc);
+ case DK_CFI_REGISTER:
+ return parseDirectiveCFIRegister(IDLoc);
+ case DK_CFI_WINDOW_SAVE:
+ return parseDirectiveCFIWindowSave();
+ case DK_MACROS_ON:
+ case DK_MACROS_OFF:
+ return parseDirectiveMacrosOnOff(IDVal);
+ case DK_MACRO:
+ return parseDirectiveMacro(IDLoc);
+ case DK_EXITM:
+ return parseDirectiveExitMacro(IDVal);
+ case DK_ENDM:
+ case DK_ENDMACRO:
+ return parseDirectiveEndMacro(IDVal);
+ case DK_PURGEM:
+ return parseDirectivePurgeMacro(IDLoc);
+ case DK_END:
+ return parseDirectiveEnd(IDLoc);
+ case DK_ERR:
+ return parseDirectiveError(IDLoc, false);
+ case DK_ERROR:
+ return parseDirectiveError(IDLoc, true);
+ case DK_WARNING:
+ return parseDirectiveWarning(IDLoc);
+ case DK_RELOC:
+ return parseDirectiveReloc(IDLoc);
+ }
+
+ return Error(IDLoc, "unknown directive");
+ }
+
+ // __asm _emit or __asm __emit
+ if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
+ IDVal == "_EMIT" || IDVal == "__EMIT"))
+ return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
+
+ // __asm align
+ if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
+ return parseDirectiveMSAlign(IDLoc, Info);
+
+ if (ParsingInlineAsm && (IDVal == "even"))
+ Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
+ checkForValidSection();
+
+ // Canonicalize the opcode to lower case.
+ std::string OpcodeStr = IDVal.lower();
+ ParseInstructionInfo IInfo(Info.AsmRewrites);
+ bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
+ Info.ParsedOperands);
+ Info.ParseError = HadError;
+
+ // Dump the parsed representation, if requested.
+ if (getShowParsedOperands()) {
+ SmallString<256> Str;
+ raw_svector_ostream OS(Str);
+ OS << "parsed instruction: [";
+ for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
+ if (i != 0)
+ OS << ", ";
+ Info.ParsedOperands[i]->print(OS);
+ }
+ OS << "]";
+
+ printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
+ }
+
+ // If we are generating dwarf for the current section then generate a .loc
+ // directive for the instruction.
+ if (!HadError && getContext().getGenDwarfForAssembly() &&
+ getContext().getGenDwarfSectionSyms().count(
+ getStreamer().getCurrentSection().first)) {
+ unsigned Line;
+ if (ActiveMacros.empty())
+ Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
+ else
+ Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
+ ActiveMacros.front()->ExitBuffer);
+
+ // If we previously parsed a cpp hash file line comment then make sure the
+ // current Dwarf File is for the CppHashFilename if not then emit the
+ // Dwarf File table for it and adjust the line number for the .loc.
+ if (CppHashFilename.size()) {
+ unsigned FileNumber = getStreamer().EmitDwarfFileDirective(
+ 0, StringRef(), CppHashFilename);
+ getContext().setGenDwarfFileNumber(FileNumber);
+
+ // Since SrcMgr.FindLineNumber() is slow and messes up the SourceMgr's
+ // cache with the different Loc from the call above we save the last
+ // info we queried here with SrcMgr.FindLineNumber().
+ unsigned CppHashLocLineNo;
+ if (LastQueryIDLoc == CppHashLoc && LastQueryBuffer == CppHashBuf)
+ CppHashLocLineNo = LastQueryLine;
+ else {
+ CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc, CppHashBuf);
+ LastQueryLine = CppHashLocLineNo;
+ LastQueryIDLoc = CppHashLoc;
+ LastQueryBuffer = CppHashBuf;
+ }
+ Line = CppHashLineNumber - 1 + (Line - CppHashLocLineNo);
+ }
+
+ getStreamer().EmitDwarfLocDirective(
+ getContext().getGenDwarfFileNumber(), Line, 0,
+ DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, 0, 0,
+ StringRef());
+ }
+
+ // If parsing succeeded, match the instruction.
+ if (!HadError) {
+ uint64_t ErrorInfo;
+ getTargetParser().MatchAndEmitInstruction(IDLoc, Info.Opcode,
+ Info.ParsedOperands, Out,
+ ErrorInfo, ParsingInlineAsm);
+ }
+
+ // Don't skip the rest of the line, the instruction parser is responsible for
+ // that.
+ return false;
+}
+
+/// eatToEndOfLine uses the Lexer to eat the characters to the end of the line
+/// since they may not be able to be tokenized to get to the end of line token.
+void AsmParser::eatToEndOfLine() {
+ if (!Lexer.is(AsmToken::EndOfStatement))
+ Lexer.LexUntilEndOfLine();
+ // Eat EOL.
+ Lex();
+}
+
+/// parseCppHashLineFilenameComment as this:
+/// ::= # number "filename"
+/// or just as a full line comment if it doesn't have a number and a string.
+bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) {
+ Lex(); // Eat the hash token.
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ // Consume the line since in cases it is not a well-formed line directive,
+ // as if were simply a full line comment.
+ eatToEndOfLine();
+ return false;
+ }
+
+ int64_t LineNumber = getTok().getIntVal();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String)) {
+ eatToEndOfLine();
+ return false;
+ }
+
+ StringRef Filename = getTok().getString();
+ // Get rid of the enclosing quotes.
+ Filename = Filename.substr(1, Filename.size() - 2);
+
+ // Save the SMLoc, Filename and LineNumber for later use by diagnostics.
+ CppHashLoc = L;
+ CppHashFilename = Filename;
+ CppHashLineNumber = LineNumber;
+ CppHashBuf = CurBuffer;
+
+ // Ignore any trailing characters, they're just comment.
+ eatToEndOfLine();
+ return false;
+}
+
+/// \brief will use the last parsed cpp hash line filename comment
+/// for the Filename and LineNo if any in the diagnostic.
+void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
+ const AsmParser *Parser = static_cast<const AsmParser *>(Context);
+ raw_ostream &OS = errs();
+
+ const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
+ SMLoc DiagLoc = Diag.getLoc();
+ unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ unsigned CppHashBuf =
+ Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc);
+
+ // Like SourceMgr::printMessage() we need to print the include stack if any
+ // before printing the message.
+ unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
+ if (!Parser->SavedDiagHandler && DiagCurBuffer &&
+ DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
+ SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
+ DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
+ }
+
+ // If we have not parsed a cpp hash line filename comment or the source
+ // manager changed or buffer changed (like in a nested include) then just
+ // print the normal diagnostic using its Filename and LineNo.
+ if (!Parser->CppHashLineNumber || &DiagSrcMgr != &Parser->SrcMgr ||
+ DiagBuf != CppHashBuf) {
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
+ else
+ Diag.print(nullptr, OS);
+ return;
+ }
+
+ // Use the CppHashFilename and calculate a line number based on the
+ // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for
+ // the diagnostic.
+ const std::string &Filename = Parser->CppHashFilename;
+
+ int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
+ int CppHashLocLineNo =
+ Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf);
+ int LineNo =
+ Parser->CppHashLineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
+
+ SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
+ Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
+ Diag.getLineContents(), Diag.getRanges());
+
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
+ else
+ NewDiag.print(nullptr, OS);
+}
+
+// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
+// difference being that that function accepts '@' as part of identifiers and
+// we can't do that. AsmLexer.cpp should probably be changed to handle
+// '@' as a special case when needed.
+static bool isIdentifierChar(char c) {
+ return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
+ c == '.';
+}
+
+bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
+ ArrayRef<MCAsmMacroParameter> Parameters,
+ ArrayRef<MCAsmMacroArgument> A,
+ bool EnableAtPseudoVariable, SMLoc L) {
+ unsigned NParameters = Parameters.size();
+ bool HasVararg = NParameters ? Parameters.back().Vararg : false;
+ if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
+ return Error(L, "Wrong number of arguments");
+
+ // A macro without parameters is handled differently on Darwin:
+ // gas accepts no arguments and does no substitutions
+ while (!Body.empty()) {
+ // Scan for the next substitution.
+ std::size_t End = Body.size(), Pos = 0;
+ for (; Pos != End; ++Pos) {
+ // Check for a substitution or escape.
+ if (IsDarwin && !NParameters) {
+ // This macro has no parameters, look for $0, $1, etc.
+ if (Body[Pos] != '$' || Pos + 1 == End)
+ continue;
+
+ char Next = Body[Pos + 1];
+ if (Next == '$' || Next == 'n' ||
+ isdigit(static_cast<unsigned char>(Next)))
+ break;
+ } else {
+ // This macro has parameters, look for \foo, \bar, etc.
+ if (Body[Pos] == '\\' && Pos + 1 != End)
+ break;
+ }
+ }
+
+ // Add the prefix.
+ OS << Body.slice(0, Pos);
+
+ // Check if we reached the end.
+ if (Pos == End)
+ break;
+
+ if (IsDarwin && !NParameters) {
+ switch (Body[Pos + 1]) {
+ // $$ => $
+ case '$':
+ OS << '$';
+ break;
+
+ // $n => number of arguments
+ case 'n':
+ OS << A.size();
+ break;
+
+ // $[0-9] => argument
+ default: {
+ // Missing arguments are ignored.
+ unsigned Index = Body[Pos + 1] - '0';
+ if (Index >= A.size())
+ break;
+
+ // Otherwise substitute with the token values, with spaces eliminated.
+ for (const AsmToken &Token : A[Index])
+ OS << Token.getString();
+ break;
+ }
+ }
+ Pos += 2;
+ } else {
+ unsigned I = Pos + 1;
+
+ // Check for the \@ pseudo-variable.
+ if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
+ ++I;
+ else
+ while (isIdentifierChar(Body[I]) && I + 1 != End)
+ ++I;
+
+ const char *Begin = Body.data() + Pos + 1;
+ StringRef Argument(Begin, I - (Pos + 1));
+ unsigned Index = 0;
+
+ if (Argument == "@") {
+ OS << NumOfMacroInstantiations;
+ Pos += 2;
+ } else {
+ for (; Index < NParameters; ++Index)
+ if (Parameters[Index].Name == Argument)
+ break;
+
+ if (Index == NParameters) {
+ if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
+ Pos += 3;
+ else {
+ OS << '\\' << Argument;
+ Pos = I;
+ }
+ } else {
+ bool VarargParameter = HasVararg && Index == (NParameters - 1);
+ for (const AsmToken &Token : A[Index])
+ // We expect no quotes around the string's contents when
+ // parsing for varargs.
+ if (Token.getKind() != AsmToken::String || VarargParameter)
+ OS << Token.getString();
+ else
+ OS << Token.getStringContents();
+
+ Pos += 1 + Argument.size();
+ }
+ }
+ }
+ // Update the scan point.
+ Body = Body.substr(Pos);
+ }
+
+ return false;
+}
+
+MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL,
+ size_t CondStackDepth)
+ : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL),
+ CondStackDepth(CondStackDepth) {}
+
+static bool isOperator(AsmToken::TokenKind kind) {
+ switch (kind) {
+ default:
+ return false;
+ case AsmToken::Plus:
+ case AsmToken::Minus:
+ case AsmToken::Tilde:
+ case AsmToken::Slash:
+ case AsmToken::Star:
+ case AsmToken::Dot:
+ case AsmToken::Equal:
+ case AsmToken::EqualEqual:
+ case AsmToken::Pipe:
+ case AsmToken::PipePipe:
+ case AsmToken::Caret:
+ case AsmToken::Amp:
+ case AsmToken::AmpAmp:
+ case AsmToken::Exclaim:
+ case AsmToken::ExclaimEqual:
+ case AsmToken::Percent:
+ case AsmToken::Less:
+ case AsmToken::LessEqual:
+ case AsmToken::LessLess:
+ case AsmToken::LessGreater:
+ case AsmToken::Greater:
+ case AsmToken::GreaterEqual:
+ case AsmToken::GreaterGreater:
+ return true;
+ }
+}
+
+namespace {
+class AsmLexerSkipSpaceRAII {
+public:
+ AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
+ Lexer.setSkipSpace(SkipSpace);
+ }
+
+ ~AsmLexerSkipSpaceRAII() {
+ Lexer.setSkipSpace(true);
+ }
+
+private:
+ AsmLexer &Lexer;
+};
+}
+
+bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
+
+ if (Vararg) {
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ StringRef Str = parseStringToEndOfStatement();
+ MA.emplace_back(AsmToken::String, Str);
+ }
+ return false;
+ }
+
+ unsigned ParenLevel = 0;
+ unsigned AddTokens = 0;
+
+ // Darwin doesn't use spaces to delmit arguments.
+ AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
+
+ for (;;) {
+ if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
+ return TokError("unexpected token in macro instantiation");
+
+ if (ParenLevel == 0 && Lexer.is(AsmToken::Comma))
+ break;
+
+ if (Lexer.is(AsmToken::Space)) {
+ Lex(); // Eat spaces
+
+ // Spaces can delimit parameters, but could also be part an expression.
+ // If the token after a space is an operator, add the token and the next
+ // one into this argument
+ if (!IsDarwin) {
+ if (isOperator(Lexer.getKind())) {
+ // Check to see whether the token is used as an operator,
+ // or part of an identifier
+ const char *NextChar = getTok().getEndLoc().getPointer();
+ if (*NextChar == ' ')
+ AddTokens = 2;
+ }
+
+ if (!AddTokens && ParenLevel == 0) {
+ break;
+ }
+ }
+ }
+
+ // handleMacroEntry relies on not advancing the lexer here
+ // to be able to fill in the remaining default parameter values
+ if (Lexer.is(AsmToken::EndOfStatement))
+ break;
+
+ // Adjust the current parentheses level.
+ if (Lexer.is(AsmToken::LParen))
+ ++ParenLevel;
+ else if (Lexer.is(AsmToken::RParen) && ParenLevel)
+ --ParenLevel;
+
+ // Append the token to the current argument list.
+ MA.push_back(getTok());
+ if (AddTokens)
+ AddTokens--;
+ Lex();
+ }
+
+ if (ParenLevel != 0)
+ return TokError("unbalanced parentheses in macro argument");
+ return false;
+}
+
+// Parse the macro instantiation arguments.
+bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
+ MCAsmMacroArguments &A) {
+ const unsigned NParameters = M ? M->Parameters.size() : 0;
+ bool NamedParametersFound = false;
+ SmallVector<SMLoc, 4> FALocs;
+
+ A.resize(NParameters);
+ FALocs.resize(NParameters);
+
+ // Parse two kinds of macro invocations:
+ // - macros defined without any parameters accept an arbitrary number of them
+ // - macros defined with parameters accept at most that many of them
+ bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
+ for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
+ ++Parameter) {
+ SMLoc IDLoc = Lexer.getLoc();
+ MCAsmMacroParameter FA;
+
+ if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
+ if (parseIdentifier(FA.Name)) {
+ Error(IDLoc, "invalid argument identifier for formal argument");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ if (!Lexer.is(AsmToken::Equal)) {
+ TokError("expected '=' after formal parameter identifier");
+ eatToEndOfStatement();
+ return true;
+ }
+ Lex();
+
+ NamedParametersFound = true;
+ }
+
+ if (NamedParametersFound && FA.Name.empty()) {
+ Error(IDLoc, "cannot mix positional and keyword arguments");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ bool Vararg = HasVararg && Parameter == (NParameters - 1);
+ if (parseMacroArgument(FA.Value, Vararg))
+ return true;
+
+ unsigned PI = Parameter;
+ if (!FA.Name.empty()) {
+ unsigned FAI = 0;
+ for (FAI = 0; FAI < NParameters; ++FAI)
+ if (M->Parameters[FAI].Name == FA.Name)
+ break;
+
+ if (FAI >= NParameters) {
+ assert(M && "expected macro to be defined");
+ Error(IDLoc,
+ "parameter named '" + FA.Name + "' does not exist for macro '" +
+ M->Name + "'");
+ return true;
+ }
+ PI = FAI;
+ }
+
+ if (!FA.Value.empty()) {
+ if (A.size() <= PI)
+ A.resize(PI + 1);
+ A[PI] = FA.Value;
+
+ if (FALocs.size() <= PI)
+ FALocs.resize(PI + 1);
+
+ FALocs[PI] = Lexer.getLoc();
+ }
+
+ // At the end of the statement, fill in remaining arguments that have
+ // default values. If there aren't any, then the next argument is
+ // required but missing
+ if (Lexer.is(AsmToken::EndOfStatement)) {
+ bool Failure = false;
+ for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
+ if (A[FAI].empty()) {
+ if (M->Parameters[FAI].Required) {
+ Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
+ "missing value for required parameter "
+ "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
+ Failure = true;
+ }
+
+ if (!M->Parameters[FAI].Value.empty())
+ A[FAI] = M->Parameters[FAI].Value;
+ }
+ }
+ return Failure;
+ }
+
+ if (Lexer.is(AsmToken::Comma))
+ Lex();
+ }
+
+ return TokError("too many positional arguments");
+}
+
+const MCAsmMacro *AsmParser::lookupMacro(StringRef Name) {
+ StringMap<MCAsmMacro>::iterator I = MacroMap.find(Name);
+ return (I == MacroMap.end()) ? nullptr : &I->getValue();
+}
+
+void AsmParser::defineMacro(StringRef Name, MCAsmMacro Macro) {
+ MacroMap.insert(std::make_pair(Name, std::move(Macro)));
+}
+
+void AsmParser::undefineMacro(StringRef Name) { MacroMap.erase(Name); }
+
+bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
+ // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
+ // this, although we should protect against infinite loops.
+ if (ActiveMacros.size() == 20)
+ return TokError("macros cannot be nested more than 20 levels deep");
+
+ MCAsmMacroArguments A;
+ if (parseMacroArguments(M, A))
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ StringRef Body = M->Body;
+ raw_svector_ostream OS(Buf);
+
+ if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
+ return true;
+
+ // We include the .endmacro in the buffer as our cue to exit the macro
+ // instantiation.
+ OS << ".endmacro\n";
+
+ std::unique_ptr<MemoryBuffer> Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(
+ NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size());
+ ActiveMacros.push_back(MI);
+
+ ++NumOfMacroInstantiations;
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
+ Lex();
+
+ return false;
+}
+
+void AsmParser::handleMacroExit() {
+ // Jump to the EndOfStatement we should return to, and consume it.
+ jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
+ Lex();
+
+ // Pop the instantiation entry.
+ delete ActiveMacros.back();
+ ActiveMacros.pop_back();
+}
+
+bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
+ bool NoDeadStrip) {
+ MCSymbol *Sym;
+ const MCExpr *Value;
+ if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
+ Value))
+ return true;
+
+ if (!Sym) {
+ // In the case where we parse an expression starting with a '.', we will
+ // not generate an error, nor will we create a symbol. In this case we
+ // should just return out.
+ return false;
+ }
+
+ // Do the assignment.
+ Out.EmitAssignment(Sym, Value);
+ if (NoDeadStrip)
+ Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip);
+
+ return false;
+}
+
+/// parseIdentifier:
+/// ::= identifier
+/// ::= string
+bool AsmParser::parseIdentifier(StringRef &Res) {
+ // The assembler has relaxed rules for accepting identifiers, in particular we
+ // allow things like '.globl $foo' and '.def @feat.00', which would normally be
+ // separate tokens. At this level, we have already lexed so we cannot (currently)
+ // handle this as a context dependent token, instead we detect adjacent tokens
+ // and return the combined identifier.
+ if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
+ SMLoc PrefixLoc = getLexer().getLoc();
+
+ // Consume the prefix character, and check for a following identifier.
+ Lex();
+ if (Lexer.isNot(AsmToken::Identifier))
+ return true;
+
+ // We have a '$' or '@' followed by an identifier, make sure they are adjacent.
+ if (PrefixLoc.getPointer() + 1 != getTok().getLoc().getPointer())
+ return true;
+
+ // Construct the joined identifier and consume the token.
+ Res =
+ StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1);
+ Lex();
+ return false;
+ }
+
+ if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
+ return true;
+
+ Res = getTok().getIdentifier();
+
+ Lex(); // Consume the identifier token.
+
+ return false;
+}
+
+/// parseDirectiveSet:
+/// ::= .equ identifier ',' expression
+/// ::= .equiv identifier ',' expression
+/// ::= .set identifier ',' expression
+bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
+ StringRef Name;
+
+ if (parseIdentifier(Name))
+ return TokError("expected identifier after '" + Twine(IDVal) + "'");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "'");
+ Lex();
+
+ return parseAssignment(Name, allow_redef, true);
+}
+
+bool AsmParser::parseEscapedString(std::string &Data) {
+ assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
+
+ Data = "";
+ StringRef Str = getTok().getStringContents();
+ for (unsigned i = 0, e = Str.size(); i != e; ++i) {
+ if (Str[i] != '\\') {
+ Data += Str[i];
+ continue;
+ }
+
+ // Recognize escaped characters. Note that this escape semantics currently
+ // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
+ ++i;
+ if (i == e)
+ return TokError("unexpected backslash at end of string");
+
+ // Recognize octal sequences.
+ if ((unsigned)(Str[i] - '0') <= 7) {
+ // Consume up to three octal characters.
+ unsigned Value = Str[i] - '0';
+
+ if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
+ ++i;
+ Value = Value * 8 + (Str[i] - '0');
+
+ if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
+ ++i;
+ Value = Value * 8 + (Str[i] - '0');
+ }
+ }
+
+ if (Value > 255)
+ return TokError("invalid octal escape sequence (out of range)");
+
+ Data += (unsigned char)Value;
+ continue;
+ }
+
+ // Otherwise recognize individual escapes.
+ switch (Str[i]) {
+ default:
+ // Just reject invalid escape sequences for now.
+ return TokError("invalid escape sequence (unrecognized character)");
+
+ case 'b': Data += '\b'; break;
+ case 'f': Data += '\f'; break;
+ case 'n': Data += '\n'; break;
+ case 'r': Data += '\r'; break;
+ case 't': Data += '\t'; break;
+ case '"': Data += '"'; break;
+ case '\\': Data += '\\'; break;
+ }
+ }
+
+ return false;
+}
+
+/// parseDirectiveAscii:
+/// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
+bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ checkForValidSection();
+
+ for (;;) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '" + Twine(IDVal) + "' directive");
+
+ std::string Data;
+ if (parseEscapedString(Data))
+ return true;
+
+ getStreamer().EmitBytes(Data);
+ if (ZeroTerminated)
+ getStreamer().EmitBytes(StringRef("\0", 1));
+
+ Lex();
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// parseDirectiveReloc
+/// ::= .reloc expression , identifier [ , expression ]
+bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
+ const MCExpr *Offset;
+ const MCExpr *Expr = nullptr;
+
+ SMLoc OffsetLoc = Lexer.getTok().getLoc();
+ if (parseExpression(Offset))
+ return true;
+
+ // We can only deal with constant expressions at the moment.
+ int64_t OffsetValue;
+ if (!Offset->evaluateAsAbsolute(OffsetValue))
+ return Error(OffsetLoc, "expression is not a constant value");
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma");
+ Lexer.Lex();
+
+ if (Lexer.isNot(AsmToken::Identifier))
+ return TokError("expected relocation name");
+ SMLoc NameLoc = Lexer.getTok().getLoc();
+ StringRef Name = Lexer.getTok().getIdentifier();
+ Lexer.Lex();
+
+ if (Lexer.is(AsmToken::Comma)) {
+ Lexer.Lex();
+ SMLoc ExprLoc = Lexer.getLoc();
+ if (parseExpression(Expr))
+ return true;
+
+ MCValue Value;
+ if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
+ return Error(ExprLoc, "expression must be relocatable");
+ }
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in .reloc directive");
+
+ if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc))
+ return Error(NameLoc, "unknown relocation name");
+
+ return false;
+}
+
+/// parseDirectiveValue
+/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
+bool AsmParser::parseDirectiveValue(unsigned Size) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ checkForValidSection();
+
+ for (;;) {
+ const MCExpr *Value;
+ SMLoc ExprLoc = getLexer().getLoc();
+ if (parseExpression(Value))
+ return true;
+
+ // Special case constant expressions to match code generator.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ assert(Size <= 8 && "Invalid size");
+ uint64_t IntValue = MCE->getValue();
+ if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
+ return Error(ExprLoc, "literal value out of range for directive");
+ getStreamer().EmitIntValue(IntValue, Size);
+ } else
+ getStreamer().EmitValue(Value, Size, ExprLoc);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ // FIXME: Improve diagnostic.
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// ParseDirectiveOctaValue
+/// ::= .octa [ hexconstant (, hexconstant)* ]
+bool AsmParser::parseDirectiveOctaValue() {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ checkForValidSection();
+
+ for (;;) {
+ if (Lexer.getKind() == AsmToken::Error)
+ return true;
+ if (Lexer.getKind() != AsmToken::Integer &&
+ Lexer.getKind() != AsmToken::BigNum)
+ return TokError("unknown token in expression");
+
+ SMLoc ExprLoc = getLexer().getLoc();
+ APInt IntValue = getTok().getAPIntVal();
+ Lex();
+
+ uint64_t hi, lo;
+ if (IntValue.isIntN(64)) {
+ hi = 0;
+ lo = IntValue.getZExtValue();
+ } else if (IntValue.isIntN(128)) {
+ // It might actually have more than 128 bits, but the top ones are zero.
+ hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
+ lo = IntValue.getLoBits(64).getZExtValue();
+ } else
+ return Error(ExprLoc, "literal value out of range for directive");
+
+ if (MAI.isLittleEndian()) {
+ getStreamer().EmitIntValue(lo, 8);
+ getStreamer().EmitIntValue(hi, 8);
+ } else {
+ getStreamer().EmitIntValue(hi, 8);
+ getStreamer().EmitIntValue(lo, 8);
+ }
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ // FIXME: Improve diagnostic.
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// parseDirectiveRealValue
+/// ::= (.single | .double) [ expression (, expression)* ]
+bool AsmParser::parseDirectiveRealValue(const fltSemantics &Semantics) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ checkForValidSection();
+
+ for (;;) {
+ // We don't truly support arithmetic on floating point expressions, so we
+ // have to manually parse unary prefixes.
+ bool IsNeg = false;
+ if (getLexer().is(AsmToken::Minus)) {
+ Lex();
+ IsNeg = true;
+ } else if (getLexer().is(AsmToken::Plus))
+ Lex();
+
+ if (getLexer().isNot(AsmToken::Integer) &&
+ getLexer().isNot(AsmToken::Real) &&
+ getLexer().isNot(AsmToken::Identifier))
+ return TokError("unexpected token in directive");
+
+ // Convert to an APFloat.
+ APFloat Value(Semantics);
+ StringRef IDVal = getTok().getString();
+ if (getLexer().is(AsmToken::Identifier)) {
+ if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
+ Value = APFloat::getInf(Semantics);
+ else if (!IDVal.compare_lower("nan"))
+ Value = APFloat::getNaN(Semantics, false, ~0);
+ else
+ return TokError("invalid floating point literal");
+ } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
+ APFloat::opInvalidOp)
+ return TokError("invalid floating point literal");
+ if (IsNeg)
+ Value.changeSign();
+
+ // Consume the numeric token.
+ Lex();
+
+ // Emit the value as an integer.
+ APInt AsInt = Value.bitcastToAPInt();
+ getStreamer().EmitIntValue(AsInt.getLimitedValue(),
+ AsInt.getBitWidth() / 8);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// parseDirectiveZero
+/// ::= .zero expression
+bool AsmParser::parseDirectiveZero() {
+ checkForValidSection();
+
+ int64_t NumBytes;
+ if (parseAbsoluteExpression(NumBytes))
+ return true;
+
+ int64_t Val = 0;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (parseAbsoluteExpression(Val))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zero' directive");
+
+ Lex();
+
+ getStreamer().EmitFill(NumBytes, Val);
+
+ return false;
+}
+
+/// parseDirectiveFill
+/// ::= .fill expression [ , expression [ , expression ] ]
+bool AsmParser::parseDirectiveFill() {
+ checkForValidSection();
+
+ SMLoc RepeatLoc = getLexer().getLoc();
+ int64_t NumValues;
+ if (parseAbsoluteExpression(NumValues))
+ return true;
+
+ if (NumValues < 0) {
+ Warning(RepeatLoc,
+ "'.fill' directive with negative repeat count has no effect");
+ NumValues = 0;
+ }
+
+ int64_t FillSize = 1;
+ int64_t FillExpr = 0;
+
+ SMLoc SizeLoc, ExprLoc;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.fill' directive");
+ Lex();
+
+ SizeLoc = getLexer().getLoc();
+ if (parseAbsoluteExpression(FillSize))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.fill' directive");
+ Lex();
+
+ ExprLoc = getLexer().getLoc();
+ if (parseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.fill' directive");
+
+ Lex();
+ }
+ }
+
+ if (FillSize < 0) {
+ Warning(SizeLoc, "'.fill' directive with negative size has no effect");
+ NumValues = 0;
+ }
+ if (FillSize > 8) {
+ Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
+ FillSize = 8;
+ }
+
+ if (!isUInt<32>(FillExpr) && FillSize > 4)
+ Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
+
+ if (NumValues > 0) {
+ int64_t NonZeroFillSize = FillSize > 4 ? 4 : FillSize;
+ FillExpr &= ~0ULL >> (64 - NonZeroFillSize * 8);
+ for (uint64_t i = 0, e = NumValues; i != e; ++i) {
+ getStreamer().EmitIntValue(FillExpr, NonZeroFillSize);
+ if (NonZeroFillSize < FillSize)
+ getStreamer().EmitIntValue(0, FillSize - NonZeroFillSize);
+ }
+ }
+
+ return false;
+}
+
+/// parseDirectiveOrg
+/// ::= .org expression [ , expression ]
+bool AsmParser::parseDirectiveOrg() {
+ checkForValidSection();
+
+ const MCExpr *Offset;
+ if (parseExpression(Offset))
+ return true;
+
+ // Parse optional fill expression.
+ int64_t FillExpr = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.org' directive");
+ Lex();
+
+ if (parseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.org' directive");
+ }
+
+ Lex();
+ getStreamer().emitValueToOffset(Offset, FillExpr);
+ return false;
+}
+
+/// parseDirectiveAlign
+/// ::= {.align, ...} expression [ , expression [ , expression ]]
+bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
+ checkForValidSection();
+
+ SMLoc AlignmentLoc = getLexer().getLoc();
+ int64_t Alignment;
+ if (parseAbsoluteExpression(Alignment))
+ return true;
+
+ SMLoc MaxBytesLoc;
+ bool HasFillExpr = false;
+ int64_t FillExpr = 0;
+ int64_t MaxBytesToFill = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ // The fill expression can be omitted while specifying a maximum number of
+ // alignment bytes, e.g:
+ // .align 3,,4
+ if (getLexer().isNot(AsmToken::Comma)) {
+ HasFillExpr = true;
+ if (parseAbsoluteExpression(FillExpr))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ MaxBytesLoc = getLexer().getLoc();
+ if (parseAbsoluteExpression(MaxBytesToFill))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+ }
+ }
+
+ Lex();
+
+ if (!HasFillExpr)
+ FillExpr = 0;
+
+ // Compute alignment in bytes.
+ if (IsPow2) {
+ // FIXME: Diagnose overflow.
+ if (Alignment >= 32) {
+ Error(AlignmentLoc, "invalid alignment value");
+ Alignment = 31;
+ }
+
+ Alignment = 1ULL << Alignment;
+ } else {
+ // Reject alignments that aren't either a power of two or zero,
+ // for gas compatibility. Alignment of zero is silently rounded
+ // up to one.
+ if (Alignment == 0)
+ Alignment = 1;
+ if (!isPowerOf2_64(Alignment))
+ Error(AlignmentLoc, "alignment must be a power of 2");
+ }
+
+ // Diagnose non-sensical max bytes to align.
+ if (MaxBytesLoc.isValid()) {
+ if (MaxBytesToFill < 1) {
+ Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
+ "many bytes, ignoring maximum bytes expression");
+ MaxBytesToFill = 0;
+ }
+
+ if (MaxBytesToFill >= Alignment) {
+ Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
+ "has no effect");
+ MaxBytesToFill = 0;
+ }
+ }
+
+ // Check whether we should use optimal code alignment for this .align
+ // directive.
+ const MCSection *Section = getStreamer().getCurrentSection().first;
+ assert(Section && "must have section to emit alignment");
+ bool UseCodeAlign = Section->UseCodeAlign();
+ if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
+ ValueSize == 1 && UseCodeAlign) {
+ getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
+ } else {
+ // FIXME: Target specific behavior about how the "extra" bytes are filled.
+ getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
+ MaxBytesToFill);
+ }
+
+ return false;
+}
+
+/// parseDirectiveFile
+/// ::= .file [number] filename
+/// ::= .file number directory filename
+bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
+ // FIXME: I'm not sure what this is.
+ int64_t FileNumber = -1;
+ SMLoc FileNumberLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Integer)) {
+ FileNumber = getTok().getIntVal();
+ Lex();
+
+ if (FileNumber < 1)
+ return TokError("file number less than one");
+ }
+
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.file' directive");
+
+ // Usually the directory and filename together, otherwise just the directory.
+ // Allow the strings to have escaped octal character sequence.
+ std::string Path = getTok().getString();
+ if (parseEscapedString(Path))
+ return true;
+ Lex();
+
+ StringRef Directory;
+ StringRef Filename;
+ std::string FilenameData;
+ if (getLexer().is(AsmToken::String)) {
+ if (FileNumber == -1)
+ return TokError("explicit path specified, but no file number");
+ if (parseEscapedString(FilenameData))
+ return true;
+ Filename = FilenameData;
+ Directory = Path;
+ Lex();
+ } else {
+ Filename = Path;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.file' directive");
+
+ if (FileNumber == -1)
+ getStreamer().EmitFileDirective(Filename);
+ else {
+ if (getContext().getGenDwarfForAssembly())
+ Error(DirectiveLoc,
+ "input can't have .file dwarf directives when -g is "
+ "used to generate dwarf debug info for assembly code");
+
+ if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename) ==
+ 0)
+ Error(FileNumberLoc, "file number already allocated");
+ }
+
+ return false;
+}
+
+/// parseDirectiveLine
+/// ::= .line [number]
+bool AsmParser::parseDirectiveLine() {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.line' directive");
+
+ int64_t LineNumber = getTok().getIntVal();
+ (void)LineNumber;
+ Lex();
+
+ // FIXME: Do something with the .line.
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.line' directive");
+
+ return false;
+}
+
+/// parseDirectiveLoc
+/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
+/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
+/// The first number is a file number, must have been previously assigned with
+/// a .file directive, the second number is the line number and optionally the
+/// third number is a column position (zero if not specified). The remaining
+/// optional items are .loc sub-directives.
+bool AsmParser::parseDirectiveLoc() {
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("unexpected token in '.loc' directive");
+ int64_t FileNumber = getTok().getIntVal();
+ if (FileNumber < 1)
+ return TokError("file number less than one in '.loc' directive");
+ if (!getContext().isValidDwarfFileNumber(FileNumber))
+ return TokError("unassigned file number in '.loc' directive");
+ Lex();
+
+ int64_t LineNumber = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ LineNumber = getTok().getIntVal();
+ if (LineNumber < 0)
+ return TokError("line number less than zero in '.loc' directive");
+ Lex();
+ }
+
+ int64_t ColumnPos = 0;
+ if (getLexer().is(AsmToken::Integer)) {
+ ColumnPos = getTok().getIntVal();
+ if (ColumnPos < 0)
+ return TokError("column position less than zero in '.loc' directive");
+ Lex();
+ }
+
+ unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
+ unsigned Isa = 0;
+ int64_t Discriminator = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ StringRef Name;
+ SMLoc Loc = getTok().getLoc();
+ if (parseIdentifier(Name))
+ return TokError("unexpected token in '.loc' directive");
+
+ if (Name == "basic_block")
+ Flags |= DWARF2_FLAG_BASIC_BLOCK;
+ else if (Name == "prologue_end")
+ Flags |= DWARF2_FLAG_PROLOGUE_END;
+ else if (Name == "epilogue_begin")
+ Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
+ else if (Name == "is_stmt") {
+ Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (parseExpression(Value))
+ return true;
+ // The expression must be the constant 0 or 1.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value == 0)
+ Flags &= ~DWARF2_FLAG_IS_STMT;
+ else if (Value == 1)
+ Flags |= DWARF2_FLAG_IS_STMT;
+ else
+ return Error(Loc, "is_stmt value not 0 or 1");
+ } else {
+ return Error(Loc, "is_stmt value not the constant value of 0 or 1");
+ }
+ } else if (Name == "isa") {
+ Loc = getTok().getLoc();
+ const MCExpr *Value;
+ if (parseExpression(Value))
+ return true;
+ // The expression must be a constant greater or equal to 0.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
+ int Value = MCE->getValue();
+ if (Value < 0)
+ return Error(Loc, "isa number less than zero");
+ Isa = Value;
+ } else {
+ return Error(Loc, "isa number not a constant value");
+ }
+ } else if (Name == "discriminator") {
+ if (parseAbsoluteExpression(Discriminator))
+ return true;
+ } else {
+ return Error(Loc, "unknown sub-directive in '.loc' directive");
+ }
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+ }
+ }
+
+ getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
+ Isa, Discriminator, StringRef());
+
+ return false;
+}
+
+/// parseDirectiveStabs
+/// ::= .stabs string, number, number, number
+bool AsmParser::parseDirectiveStabs() {
+ return TokError("unsupported directive '.stabs'");
+}
+
+/// parseDirectiveCFISections
+/// ::= .cfi_sections section [, section]
+bool AsmParser::parseDirectiveCFISections() {
+ StringRef Name;
+ bool EH = false;
+ bool Debug = false;
+
+ if (parseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (parseIdentifier(Name))
+ return TokError("Expected an identifier");
+
+ if (Name == ".eh_frame")
+ EH = true;
+ else if (Name == ".debug_frame")
+ Debug = true;
+ }
+
+ getStreamer().EmitCFISections(EH, Debug);
+ return false;
+}
+
+/// parseDirectiveCFIStartProc
+/// ::= .cfi_startproc [simple]
+bool AsmParser::parseDirectiveCFIStartProc() {
+ StringRef Simple;
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ if (parseIdentifier(Simple) || Simple != "simple")
+ return TokError("unexpected token in .cfi_startproc directive");
+
+ getStreamer().EmitCFIStartProc(!Simple.empty());
+ return false;
+}
+
+/// parseDirectiveCFIEndProc
+/// ::= .cfi_endproc
+bool AsmParser::parseDirectiveCFIEndProc() {
+ getStreamer().EmitCFIEndProc();
+ return false;
+}
+
+/// \brief parse register name or number.
+bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
+ SMLoc DirectiveLoc) {
+ unsigned RegNo;
+
+ if (getLexer().isNot(AsmToken::Integer)) {
+ if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
+ return true;
+ Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
+ } else
+ return parseAbsoluteExpression(Register);
+
+ return false;
+}
+
+/// parseDirectiveCFIDefCfa
+/// ::= .cfi_def_cfa register, offset
+bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (parseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfa(Register, Offset);
+ return false;
+}
+
+/// parseDirectiveCFIDefCfaOffset
+/// ::= .cfi_def_cfa_offset offset
+bool AsmParser::parseDirectiveCFIDefCfaOffset() {
+ int64_t Offset = 0;
+ if (parseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIDefCfaOffset(Offset);
+ return false;
+}
+
+/// parseDirectiveCFIRegister
+/// ::= .cfi_register register, register
+bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
+ int64_t Register1 = 0;
+ if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Register2 = 0;
+ if (parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIRegister(Register1, Register2);
+ return false;
+}
+
+/// parseDirectiveCFIWindowSave
+/// ::= .cfi_window_save
+bool AsmParser::parseDirectiveCFIWindowSave() {
+ getStreamer().EmitCFIWindowSave();
+ return false;
+}
+
+/// parseDirectiveCFIAdjustCfaOffset
+/// ::= .cfi_adjust_cfa_offset adjustment
+bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
+ int64_t Adjustment = 0;
+ if (parseAbsoluteExpression(Adjustment))
+ return true;
+
+ getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
+ return false;
+}
+
+/// parseDirectiveCFIDefCfaRegister
+/// ::= .cfi_def_cfa_register register
+bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIDefCfaRegister(Register);
+ return false;
+}
+
+/// parseDirectiveCFIOffset
+/// ::= .cfi_offset register, offset
+bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ int64_t Offset = 0;
+
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ if (parseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIOffset(Register, Offset);
+ return false;
+}
+
+/// parseDirectiveCFIRelOffset
+/// ::= .cfi_rel_offset register, offset
+bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Offset = 0;
+ if (parseAbsoluteExpression(Offset))
+ return true;
+
+ getStreamer().EmitCFIRelOffset(Register, Offset);
+ return false;
+}
+
+static bool isValidEncoding(int64_t Encoding) {
+ if (Encoding & ~0xff)
+ return false;
+
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return true;
+
+ const unsigned Format = Encoding & 0xf;
+ if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
+ Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
+ Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
+ Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
+ return false;
+
+ const unsigned Application = Encoding & 0x70;
+ if (Application != dwarf::DW_EH_PE_absptr &&
+ Application != dwarf::DW_EH_PE_pcrel)
+ return false;
+
+ return true;
+}
+
+/// parseDirectiveCFIPersonalityOrLsda
+/// IsPersonality true for cfi_personality, false for cfi_lsda
+/// ::= .cfi_personality encoding, [symbol_name]
+/// ::= .cfi_lsda encoding, [symbol_name]
+bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
+ int64_t Encoding = 0;
+ if (parseAbsoluteExpression(Encoding))
+ return true;
+ if (Encoding == dwarf::DW_EH_PE_omit)
+ return false;
+
+ if (!isValidEncoding(Encoding))
+ return TokError("unsupported encoding.");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ StringRef Name;
+ if (parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ if (IsPersonality)
+ getStreamer().EmitCFIPersonality(Sym, Encoding);
+ else
+ getStreamer().EmitCFILsda(Sym, Encoding);
+ return false;
+}
+
+/// parseDirectiveCFIRememberState
+/// ::= .cfi_remember_state
+bool AsmParser::parseDirectiveCFIRememberState() {
+ getStreamer().EmitCFIRememberState();
+ return false;
+}
+
+/// parseDirectiveCFIRestoreState
+/// ::= .cfi_remember_state
+bool AsmParser::parseDirectiveCFIRestoreState() {
+ getStreamer().EmitCFIRestoreState();
+ return false;
+}
+
+/// parseDirectiveCFISameValue
+/// ::= .cfi_same_value register
+bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFISameValue(Register);
+ return false;
+}
+
+/// parseDirectiveCFIRestore
+/// ::= .cfi_restore register
+bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIRestore(Register);
+ return false;
+}
+
+/// parseDirectiveCFIEscape
+/// ::= .cfi_escape expression[,...]
+bool AsmParser::parseDirectiveCFIEscape() {
+ std::string Values;
+ int64_t CurrValue;
+ if (parseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+
+ while (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (parseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+ }
+
+ getStreamer().EmitCFIEscape(Values);
+ return false;
+}
+
+/// parseDirectiveCFISignalFrame
+/// ::= .cfi_signal_frame
+bool AsmParser::parseDirectiveCFISignalFrame() {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '.cfi_signal_frame'");
+
+ getStreamer().EmitCFISignalFrame();
+ return false;
+}
+
+/// parseDirectiveCFIUndefined
+/// ::= .cfi_undefined register
+bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+
+ if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIUndefined(Register);
+ return false;
+}
+
+/// parseDirectiveMacrosOnOff
+/// ::= .macros_on
+/// ::= .macros_off
+bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ setMacrosEnabled(Directive == ".macros_on");
+ return false;
+}
+
+/// parseDirectiveMacro
+/// ::= .macro name[,] [parameters]
+bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (parseIdentifier(Name))
+ return TokError("expected identifier in '.macro' directive");
+
+ if (getLexer().is(AsmToken::Comma))
+ Lex();
+
+ MCAsmMacroParameters Parameters;
+ while (getLexer().isNot(AsmToken::EndOfStatement)) {
+
+ if (!Parameters.empty() && Parameters.back().Vararg)
+ return Error(Lexer.getLoc(),
+ "Vararg parameter '" + Parameters.back().Name +
+ "' should be last one in the list of parameters.");
+
+ MCAsmMacroParameter Parameter;
+ if (parseIdentifier(Parameter.Name))
+ return TokError("expected identifier in '.macro' directive");
+
+ if (Lexer.is(AsmToken::Colon)) {
+ Lex(); // consume ':'
+
+ SMLoc QualLoc;
+ StringRef Qualifier;
+
+ QualLoc = Lexer.getLoc();
+ if (parseIdentifier(Qualifier))
+ return Error(QualLoc, "missing parameter qualifier for "
+ "'" + Parameter.Name + "' in macro '" + Name + "'");
+
+ if (Qualifier == "req")
+ Parameter.Required = true;
+ else if (Qualifier == "vararg")
+ Parameter.Vararg = true;
+ else
+ return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
+ "for '" + Parameter.Name + "' in macro '" + Name + "'");
+ }
+
+ if (getLexer().is(AsmToken::Equal)) {
+ Lex();
+
+ SMLoc ParamLoc;
+
+ ParamLoc = Lexer.getLoc();
+ if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
+ return true;
+
+ if (Parameter.Required)
+ Warning(ParamLoc, "pointless default value for required parameter "
+ "'" + Parameter.Name + "' in macro '" + Name + "'");
+ }
+
+ Parameters.push_back(std::move(Parameter));
+
+ if (getLexer().is(AsmToken::Comma))
+ Lex();
+ }
+
+ // Eat the end of statement.
+ Lex();
+
+ AsmToken EndToken, StartToken = getTok();
+ unsigned MacroDepth = 0;
+
+ // Lex the macro definition.
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof))
+ return Error(DirectiveLoc, "no matching '.endmacro' in definition");
+
+ // Otherwise, check whether we have reach the .endmacro.
+ if (getLexer().is(AsmToken::Identifier)) {
+ if (getTok().getIdentifier() == ".endm" ||
+ getTok().getIdentifier() == ".endmacro") {
+ if (MacroDepth == 0) { // Outermost macro.
+ EndToken = getTok();
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + EndToken.getIdentifier() +
+ "' directive");
+ break;
+ } else {
+ // Otherwise we just found the end of an inner macro.
+ --MacroDepth;
+ }
+ } else if (getTok().getIdentifier() == ".macro") {
+ // We allow nested macros. Those aren't instantiated until the outermost
+ // macro is expanded so just ignore them for now.
+ ++MacroDepth;
+ }
+ }
+
+ // Otherwise, scan til the end of the statement.
+ eatToEndOfStatement();
+ }
+
+ if (lookupMacro(Name)) {
+ return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+ checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
+ defineMacro(Name, MCAsmMacro(Name, Body, std::move(Parameters)));
+ return false;
+}
+
+/// checkForBadMacro
+///
+/// With the support added for named parameters there may be code out there that
+/// is transitioning from positional parameters. In versions of gas that did
+/// not support named parameters they would be ignored on the macro definition.
+/// But to support both styles of parameters this is not possible so if a macro
+/// definition has named parameters but does not use them and has what appears
+/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
+/// warning that the positional parameter found in body which have no effect.
+/// Hoping the developer will either remove the named parameters from the macro
+/// definition so the positional parameters get used if that was what was
+/// intended or change the macro to use the named parameters. It is possible
+/// this warning will trigger when the none of the named parameters are used
+/// and the strings like $1 are infact to simply to be passed trough unchanged.
+void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
+ StringRef Body,
+ ArrayRef<MCAsmMacroParameter> Parameters) {
+ // If this macro is not defined with named parameters the warning we are
+ // checking for here doesn't apply.
+ unsigned NParameters = Parameters.size();
+ if (NParameters == 0)
+ return;
+
+ bool NamedParametersFound = false;
+ bool PositionalParametersFound = false;
+
+ // Look at the body of the macro for use of both the named parameters and what
+ // are likely to be positional parameters. This is what expandMacro() is
+ // doing when it finds the parameters in the body.
+ while (!Body.empty()) {
+ // Scan for the next possible parameter.
+ std::size_t End = Body.size(), Pos = 0;
+ for (; Pos != End; ++Pos) {
+ // Check for a substitution or escape.
+ // This macro is defined with parameters, look for \foo, \bar, etc.
+ if (Body[Pos] == '\\' && Pos + 1 != End)
+ break;
+
+ // This macro should have parameters, but look for $0, $1, ..., $n too.
+ if (Body[Pos] != '$' || Pos + 1 == End)
+ continue;
+ char Next = Body[Pos + 1];
+ if (Next == '$' || Next == 'n' ||
+ isdigit(static_cast<unsigned char>(Next)))
+ break;
+ }
+
+ // Check if we reached the end.
+ if (Pos == End)
+ break;
+
+ if (Body[Pos] == '$') {
+ switch (Body[Pos + 1]) {
+ // $$ => $
+ case '$':
+ break;
+
+ // $n => number of arguments
+ case 'n':
+ PositionalParametersFound = true;
+ break;
+
+ // $[0-9] => argument
+ default: {
+ PositionalParametersFound = true;
+ break;
+ }
+ }
+ Pos += 2;
+ } else {
+ unsigned I = Pos + 1;
+ while (isIdentifierChar(Body[I]) && I + 1 != End)
+ ++I;
+
+ const char *Begin = Body.data() + Pos + 1;
+ StringRef Argument(Begin, I - (Pos + 1));
+ unsigned Index = 0;
+ for (; Index < NParameters; ++Index)
+ if (Parameters[Index].Name == Argument)
+ break;
+
+ if (Index == NParameters) {
+ if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
+ Pos += 3;
+ else {
+ Pos = I;
+ }
+ } else {
+ NamedParametersFound = true;
+ Pos += 1 + Argument.size();
+ }
+ }
+ // Update the scan point.
+ Body = Body.substr(Pos);
+ }
+
+ if (!NamedParametersFound && PositionalParametersFound)
+ Warning(DirectiveLoc, "macro defined with named parameters which are not "
+ "used in macro body, possible positional parameter "
+ "found in body which will have no effect");
+}
+
+/// parseDirectiveExitMacro
+/// ::= .exitm
+bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Directive + "' directive");
+
+ if (!isInsideMacroInstantiation())
+ return TokError("unexpected '" + Directive + "' in file, "
+ "no current macro definition");
+
+ // Exit all conditionals that are active in the current macro.
+ while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
+ TheCondState = TheCondStack.back();
+ TheCondStack.pop_back();
+ }
+
+ handleMacroExit();
+ return false;
+}
+
+/// parseDirectiveEndMacro
+/// ::= .endm
+/// ::= .endmacro
+bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Directive + "' directive");
+
+ // If we are inside a macro instantiation, terminate the current
+ // instantiation.
+ if (isInsideMacroInstantiation()) {
+ handleMacroExit();
+ return false;
+ }
+
+ // Otherwise, this .endmacro is a stray entry in the file; well formed
+ // .endmacro directives are handled during the macro definition parsing.
+ return TokError("unexpected '" + Directive + "' in file, "
+ "no current macro definition");
+}
+
+/// parseDirectivePurgeMacro
+/// ::= .purgem
+bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (parseIdentifier(Name))
+ return TokError("expected identifier in '.purgem' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.purgem' directive");
+
+ if (!lookupMacro(Name))
+ return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
+
+ undefineMacro(Name);
+ return false;
+}
+
+/// parseDirectiveBundleAlignMode
+/// ::= {.bundle_align_mode} expression
+bool AsmParser::parseDirectiveBundleAlignMode() {
+ checkForValidSection();
+
+ // Expect a single argument: an expression that evaluates to a constant
+ // in the inclusive range 0-30.
+ SMLoc ExprLoc = getLexer().getLoc();
+ int64_t AlignSizePow2;
+ if (parseAbsoluteExpression(AlignSizePow2))
+ return true;
+ else if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token after expression in"
+ " '.bundle_align_mode' directive");
+ else if (AlignSizePow2 < 0 || AlignSizePow2 > 30)
+ return Error(ExprLoc,
+ "invalid bundle alignment size (expected between 0 and 30)");
+
+ Lex();
+
+ // Because of AlignSizePow2's verified range we can safely truncate it to
+ // unsigned.
+ getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
+ return false;
+}
+
+/// parseDirectiveBundleLock
+/// ::= {.bundle_lock} [align_to_end]
+bool AsmParser::parseDirectiveBundleLock() {
+ checkForValidSection();
+ bool AlignToEnd = false;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ StringRef Option;
+ SMLoc Loc = getTok().getLoc();
+ const char *kInvalidOptionError =
+ "invalid option for '.bundle_lock' directive";
+
+ if (parseIdentifier(Option))
+ return Error(Loc, kInvalidOptionError);
+
+ if (Option != "align_to_end")
+ return Error(Loc, kInvalidOptionError);
+ else if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(Loc,
+ "unexpected token after '.bundle_lock' directive option");
+ AlignToEnd = true;
+ }
+
+ Lex();
+
+ getStreamer().EmitBundleLock(AlignToEnd);
+ return false;
+}
+
+/// parseDirectiveBundleLock
+/// ::= {.bundle_lock}
+bool AsmParser::parseDirectiveBundleUnlock() {
+ checkForValidSection();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.bundle_unlock' directive");
+ Lex();
+
+ getStreamer().EmitBundleUnlock();
+ return false;
+}
+
+/// parseDirectiveSpace
+/// ::= (.skip | .space) expression [ , expression ]
+bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
+ checkForValidSection();
+
+ int64_t NumBytes;
+ if (parseAbsoluteExpression(NumBytes))
+ return true;
+
+ int64_t FillExpr = 0;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
+ Lex();
+
+ if (parseAbsoluteExpression(FillExpr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
+ }
+
+ Lex();
+
+ if (NumBytes <= 0)
+ return TokError("invalid number of bytes in '" + Twine(IDVal) +
+ "' directive");
+
+ // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
+ getStreamer().EmitFill(NumBytes, FillExpr);
+
+ return false;
+}
+
+/// parseDirectiveLEB128
+/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
+bool AsmParser::parseDirectiveLEB128(bool Signed) {
+ checkForValidSection();
+ const MCExpr *Value;
+
+ for (;;) {
+ if (parseExpression(Value))
+ return true;
+
+ if (Signed)
+ getStreamer().EmitSLEB128Value(Value);
+ else
+ getStreamer().EmitULEB128Value(Value);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+
+ return false;
+}
+
+/// parseDirectiveSymbolAttribute
+/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
+bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+ SMLoc Loc = getTok().getLoc();
+
+ if (parseIdentifier(Name))
+ return Error(Loc, "expected identifier in directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ // Assembler local symbols don't make any sense here. Complain loudly.
+ if (Sym->isTemporary())
+ return Error(Loc, "non-local symbol required in directive");
+
+ if (!getStreamer().EmitSymbolAttribute(Sym, Attr))
+ return Error(Loc, "unable to emit symbol attribute");
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+/// parseDirectiveComm
+/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
+bool AsmParser::parseDirectiveComm(bool IsLocal) {
+ checkForValidSection();
+
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef Name;
+ if (parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (parseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (parseAbsoluteExpression(Pow2Alignment))
+ return true;
+
+ LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
+ if (IsLocal && LCOMM == LCOMM::NoAlignment)
+ return Error(Pow2AlignmentLoc, "alignment not supported on this target");
+
+ // If this target takes alignments in bytes (not log) validate and convert.
+ if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
+ (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
+ if (!isPowerOf2_64(Pow2Alignment))
+ return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
+ Pow2Alignment = Log2_64(Pow2Alignment);
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.comm' or '.lcomm' directive");
+
+ Lex();
+
+ // NOTE: a size of zero for a .comm should create a undefined symbol
+ // but a size of .lcomm creates a bss symbol of size zero.
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
+ "be less than zero");
+
+ // NOTE: The alignment in the directive is a power of 2 value, the assembler
+ // may internally end up wanting an alignment in bytes.
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
+ "alignment, can't be less than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // Create the Symbol as a common or local common with Size and Pow2Alignment
+ if (IsLocal) {
+ getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
+ return false;
+ }
+
+ getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
+ return false;
+}
+
+/// parseDirectiveAbort
+/// ::= .abort [... message ...]
+bool AsmParser::parseDirectiveAbort() {
+ // FIXME: Use loc from directive.
+ SMLoc Loc = getLexer().getLoc();
+
+ StringRef Str = parseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.abort' directive");
+
+ Lex();
+
+ if (Str.empty())
+ Error(Loc, ".abort detected. Assembly stopping.");
+ else
+ Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
+ // FIXME: Actually abort assembly here.
+
+ return false;
+}
+
+/// parseDirectiveInclude
+/// ::= .include "filename"
+bool AsmParser::parseDirectiveInclude() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.include' directive");
+
+ // Allow the strings to have escaped octal character sequence.
+ std::string Filename;
+ if (parseEscapedString(Filename))
+ return true;
+ SMLoc IncludeLoc = getLexer().getLoc();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.include' directive");
+
+ // Attempt to switch the lexer to the included file before consuming the end
+ // of statement to avoid losing it when we switch.
+ if (enterIncludeFile(Filename)) {
+ Error(IncludeLoc, "Could not find include file '" + Filename + "'");
+ return true;
+ }
+
+ return false;
+}
+
+/// parseDirectiveIncbin
+/// ::= .incbin "filename"
+bool AsmParser::parseDirectiveIncbin() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.incbin' directive");
+
+ // Allow the strings to have escaped octal character sequence.
+ std::string Filename;
+ if (parseEscapedString(Filename))
+ return true;
+ SMLoc IncbinLoc = getLexer().getLoc();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.incbin' directive");
+
+ // Attempt to process the included file.
+ if (processIncbinFile(Filename)) {
+ Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
+ return true;
+ }
+
+ return false;
+}
+
+/// parseDirectiveIf
+/// ::= .if{,eq,ge,gt,le,lt,ne} expression
+bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+ if (TheCondState.Ignore) {
+ eatToEndOfStatement();
+ } else {
+ int64_t ExprValue;
+ if (parseAbsoluteExpression(ExprValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.if' directive");
+
+ Lex();
+
+ switch (DirKind) {
+ default:
+ llvm_unreachable("unsupported directive");
+ case DK_IF:
+ case DK_IFNE:
+ break;
+ case DK_IFEQ:
+ ExprValue = ExprValue == 0;
+ break;
+ case DK_IFGE:
+ ExprValue = ExprValue >= 0;
+ break;
+ case DK_IFGT:
+ ExprValue = ExprValue > 0;
+ break;
+ case DK_IFLE:
+ ExprValue = ExprValue <= 0;
+ break;
+ case DK_IFLT:
+ ExprValue = ExprValue < 0;
+ break;
+ }
+
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// parseDirectiveIfb
+/// ::= .ifb string
+bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ eatToEndOfStatement();
+ } else {
+ StringRef Str = parseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifb' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectBlank == Str.empty();
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// parseDirectiveIfc
+/// ::= .ifc string1, string2
+/// ::= .ifnc string1, string2
+bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ eatToEndOfStatement();
+ } else {
+ StringRef Str1 = parseStringToComma();
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ StringRef Str2 = parseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// parseDirectiveIfeqs
+/// ::= .ifeqs string1, string2
+bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
+ if (Lexer.isNot(AsmToken::String)) {
+ if (ExpectEqual)
+ TokError("expected string parameter for '.ifeqs' directive");
+ else
+ TokError("expected string parameter for '.ifnes' directive");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ StringRef String1 = getTok().getStringContents();
+ Lex();
+
+ if (Lexer.isNot(AsmToken::Comma)) {
+ if (ExpectEqual)
+ TokError("expected comma after first string for '.ifeqs' directive");
+ else
+ TokError("expected comma after first string for '.ifnes' directive");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ Lex();
+
+ if (Lexer.isNot(AsmToken::String)) {
+ if (ExpectEqual)
+ TokError("expected string parameter for '.ifeqs' directive");
+ else
+ TokError("expected string parameter for '.ifnes' directive");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ StringRef String2 = getTok().getStringContents();
+ Lex();
+
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+ TheCondState.CondMet = ExpectEqual == (String1 == String2);
+ TheCondState.Ignore = !TheCondState.CondMet;
+
+ return false;
+}
+
+/// parseDirectiveIfdef
+/// ::= .ifdef symbol
+bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
+ StringRef Name;
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ eatToEndOfStatement();
+ } else {
+ if (parseIdentifier(Name))
+ return TokError("expected identifier after '.ifdef'");
+
+ Lex();
+
+ MCSymbol *Sym = getContext().lookupSymbol(Name);
+
+ if (expect_defined)
+ TheCondState.CondMet = (Sym && !Sym->isUndefined());
+ else
+ TheCondState.CondMet = (!Sym || Sym->isUndefined());
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// parseDirectiveElseIf
+/// ::= .elseif expression
+bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
+ if (TheCondState.TheCond != AsmCond::IfCond &&
+ TheCondState.TheCond != AsmCond::ElseIfCond)
+ Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
+ " an .elseif");
+ TheCondState.TheCond = AsmCond::ElseIfCond;
+
+ bool LastIgnoreState = false;
+ if (!TheCondStack.empty())
+ LastIgnoreState = TheCondStack.back().Ignore;
+ if (LastIgnoreState || TheCondState.CondMet) {
+ TheCondState.Ignore = true;
+ eatToEndOfStatement();
+ } else {
+ int64_t ExprValue;
+ if (parseAbsoluteExpression(ExprValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.elseif' directive");
+
+ Lex();
+ TheCondState.CondMet = ExprValue;
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// parseDirectiveElse
+/// ::= .else
+bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.else' directive");
+
+ Lex();
+
+ if (TheCondState.TheCond != AsmCond::IfCond &&
+ TheCondState.TheCond != AsmCond::ElseIfCond)
+ Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an "
+ ".elseif");
+ TheCondState.TheCond = AsmCond::ElseCond;
+ bool LastIgnoreState = false;
+ if (!TheCondStack.empty())
+ LastIgnoreState = TheCondStack.back().Ignore;
+ if (LastIgnoreState || TheCondState.CondMet)
+ TheCondState.Ignore = true;
+ else
+ TheCondState.Ignore = false;
+
+ return false;
+}
+
+/// parseDirectiveEnd
+/// ::= .end
+bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.end' directive");
+
+ Lex();
+
+ while (Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ return false;
+}
+
+/// parseDirectiveError
+/// ::= .err
+/// ::= .error [string]
+bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
+ if (!TheCondStack.empty()) {
+ if (TheCondStack.back().Ignore) {
+ eatToEndOfStatement();
+ return false;
+ }
+ }
+
+ if (!WithMessage)
+ return Error(L, ".err encountered");
+
+ StringRef Message = ".error directive invoked in source file";
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::String)) {
+ TokError(".error argument must be a string");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ Message = getTok().getStringContents();
+ Lex();
+ }
+
+ Error(L, Message);
+ return true;
+}
+
+/// parseDirectiveWarning
+/// ::= .warning [string]
+bool AsmParser::parseDirectiveWarning(SMLoc L) {
+ if (!TheCondStack.empty()) {
+ if (TheCondStack.back().Ignore) {
+ eatToEndOfStatement();
+ return false;
+ }
+ }
+
+ StringRef Message = ".warning directive invoked in source file";
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ if (Lexer.isNot(AsmToken::String)) {
+ TokError(".warning argument must be a string");
+ eatToEndOfStatement();
+ return true;
+ }
+
+ Message = getTok().getStringContents();
+ Lex();
+ }
+
+ Warning(L, Message);
+ return false;
+}
+
+/// parseDirectiveEndIf
+/// ::= .endif
+bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.endif' directive");
+
+ Lex();
+
+ if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
+ Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or "
+ ".else");
+ if (!TheCondStack.empty()) {
+ TheCondState = TheCondStack.back();
+ TheCondStack.pop_back();
+ }
+
+ return false;
+}
+
+void AsmParser::initializeDirectiveKindMap() {
+ DirectiveKindMap[".set"] = DK_SET;
+ DirectiveKindMap[".equ"] = DK_EQU;
+ DirectiveKindMap[".equiv"] = DK_EQUIV;
+ DirectiveKindMap[".ascii"] = DK_ASCII;
+ DirectiveKindMap[".asciz"] = DK_ASCIZ;
+ DirectiveKindMap[".string"] = DK_STRING;
+ DirectiveKindMap[".byte"] = DK_BYTE;
+ DirectiveKindMap[".short"] = DK_SHORT;
+ DirectiveKindMap[".value"] = DK_VALUE;
+ DirectiveKindMap[".2byte"] = DK_2BYTE;
+ DirectiveKindMap[".long"] = DK_LONG;
+ DirectiveKindMap[".int"] = DK_INT;
+ DirectiveKindMap[".4byte"] = DK_4BYTE;
+ DirectiveKindMap[".quad"] = DK_QUAD;
+ DirectiveKindMap[".8byte"] = DK_8BYTE;
+ DirectiveKindMap[".octa"] = DK_OCTA;
+ DirectiveKindMap[".single"] = DK_SINGLE;
+ DirectiveKindMap[".float"] = DK_FLOAT;
+ DirectiveKindMap[".double"] = DK_DOUBLE;
+ DirectiveKindMap[".align"] = DK_ALIGN;
+ DirectiveKindMap[".align32"] = DK_ALIGN32;
+ DirectiveKindMap[".balign"] = DK_BALIGN;
+ DirectiveKindMap[".balignw"] = DK_BALIGNW;
+ DirectiveKindMap[".balignl"] = DK_BALIGNL;
+ DirectiveKindMap[".p2align"] = DK_P2ALIGN;
+ DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
+ DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
+ DirectiveKindMap[".org"] = DK_ORG;
+ DirectiveKindMap[".fill"] = DK_FILL;
+ DirectiveKindMap[".zero"] = DK_ZERO;
+ DirectiveKindMap[".extern"] = DK_EXTERN;
+ DirectiveKindMap[".globl"] = DK_GLOBL;
+ DirectiveKindMap[".global"] = DK_GLOBAL;
+ DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
+ DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
+ DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
+ DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
+ DirectiveKindMap[".reference"] = DK_REFERENCE;
+ DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
+ DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
+ DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
+ DirectiveKindMap[".comm"] = DK_COMM;
+ DirectiveKindMap[".common"] = DK_COMMON;
+ DirectiveKindMap[".lcomm"] = DK_LCOMM;
+ DirectiveKindMap[".abort"] = DK_ABORT;
+ DirectiveKindMap[".include"] = DK_INCLUDE;
+ DirectiveKindMap[".incbin"] = DK_INCBIN;
+ DirectiveKindMap[".code16"] = DK_CODE16;
+ DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
+ DirectiveKindMap[".rept"] = DK_REPT;
+ DirectiveKindMap[".rep"] = DK_REPT;
+ DirectiveKindMap[".irp"] = DK_IRP;
+ DirectiveKindMap[".irpc"] = DK_IRPC;
+ DirectiveKindMap[".endr"] = DK_ENDR;
+ DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
+ DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
+ DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
+ DirectiveKindMap[".if"] = DK_IF;
+ DirectiveKindMap[".ifeq"] = DK_IFEQ;
+ DirectiveKindMap[".ifge"] = DK_IFGE;
+ DirectiveKindMap[".ifgt"] = DK_IFGT;
+ DirectiveKindMap[".ifle"] = DK_IFLE;
+ DirectiveKindMap[".iflt"] = DK_IFLT;
+ DirectiveKindMap[".ifne"] = DK_IFNE;
+ DirectiveKindMap[".ifb"] = DK_IFB;
+ DirectiveKindMap[".ifnb"] = DK_IFNB;
+ DirectiveKindMap[".ifc"] = DK_IFC;
+ DirectiveKindMap[".ifeqs"] = DK_IFEQS;
+ DirectiveKindMap[".ifnc"] = DK_IFNC;
+ DirectiveKindMap[".ifnes"] = DK_IFNES;
+ DirectiveKindMap[".ifdef"] = DK_IFDEF;
+ DirectiveKindMap[".ifndef"] = DK_IFNDEF;
+ DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
+ DirectiveKindMap[".elseif"] = DK_ELSEIF;
+ DirectiveKindMap[".else"] = DK_ELSE;
+ DirectiveKindMap[".end"] = DK_END;
+ DirectiveKindMap[".endif"] = DK_ENDIF;
+ DirectiveKindMap[".skip"] = DK_SKIP;
+ DirectiveKindMap[".space"] = DK_SPACE;
+ DirectiveKindMap[".file"] = DK_FILE;
+ DirectiveKindMap[".line"] = DK_LINE;
+ DirectiveKindMap[".loc"] = DK_LOC;
+ DirectiveKindMap[".stabs"] = DK_STABS;
+ DirectiveKindMap[".sleb128"] = DK_SLEB128;
+ DirectiveKindMap[".uleb128"] = DK_ULEB128;
+ DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
+ DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
+ DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
+ DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
+ DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
+ DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
+ DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
+ DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
+ DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
+ DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
+ DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
+ DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
+ DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
+ DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
+ DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
+ DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
+ DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
+ DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
+ DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
+ DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
+ DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
+ DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
+ DirectiveKindMap[".macro"] = DK_MACRO;
+ DirectiveKindMap[".exitm"] = DK_EXITM;
+ DirectiveKindMap[".endm"] = DK_ENDM;
+ DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
+ DirectiveKindMap[".purgem"] = DK_PURGEM;
+ DirectiveKindMap[".err"] = DK_ERR;
+ DirectiveKindMap[".error"] = DK_ERROR;
+ DirectiveKindMap[".warning"] = DK_WARNING;
+ DirectiveKindMap[".reloc"] = DK_RELOC;
+}
+
+MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
+ AsmToken EndToken, StartToken = getTok();
+
+ unsigned NestLevel = 0;
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof)) {
+ Error(DirectiveLoc, "no matching '.endr' in definition");
+ return nullptr;
+ }
+
+ if (Lexer.is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".rept")) {
+ ++NestLevel;
+ }
+
+ // Otherwise, check whether we have reached the .endr.
+ if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
+ if (NestLevel == 0) {
+ EndToken = getTok();
+ Lex();
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ TokError("unexpected token in '.endr' directive");
+ return nullptr;
+ }
+ break;
+ }
+ --NestLevel;
+ }
+
+ // Otherwise, scan till the end of the statement.
+ eatToEndOfStatement();
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+
+ // We Are Anonymous.
+ MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
+ return &MacroLikeBodies.back();
+}
+
+void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS) {
+ OS << ".endr\n";
+
+ std::unique_ptr<MemoryBuffer> Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(
+ DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size());
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
+ Lex();
+}
+
+/// parseDirectiveRept
+/// ::= .rep | .rept count
+bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
+ const MCExpr *CountExpr;
+ SMLoc CountLoc = getTok().getLoc();
+ if (parseExpression(CountExpr))
+ return true;
+
+ int64_t Count;
+ if (!CountExpr->evaluateAsAbsolute(Count)) {
+ eatToEndOfStatement();
+ return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
+ }
+
+ if (Count < 0)
+ return Error(CountLoc, "Count is negative");
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '" + Dir + "' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the rept definition.
+ MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+ while (Count--) {
+ // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
+ if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
+ return true;
+ }
+ instantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// parseDirectiveIrp
+/// ::= .irp symbol,values
+bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
+ MCAsmMacroParameter Parameter;
+
+ if (parseIdentifier(Parameter.Name))
+ return TokError("expected identifier in '.irp' directive");
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irp' directive");
+
+ Lex();
+
+ MCAsmMacroArguments A;
+ if (parseMacroArguments(nullptr, A))
+ return true;
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irp definition.
+ MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ for (const MCAsmMacroArgument &Arg : A) {
+ // Note that the AtPseudoVariable is enabled for instantiations of .irp.
+ // This is undocumented, but GAS seems to support it.
+ if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
+ return true;
+ }
+
+ instantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// parseDirectiveIrpc
+/// ::= .irpc symbol,values
+bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
+ MCAsmMacroParameter Parameter;
+
+ if (parseIdentifier(Parameter.Name))
+ return TokError("expected identifier in '.irpc' directive");
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irpc' directive");
+
+ Lex();
+
+ MCAsmMacroArguments A;
+ if (parseMacroArguments(nullptr, A))
+ return true;
+
+ if (A.size() != 1 || A.front().size() != 1)
+ return TokError("unexpected token in '.irpc' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irpc definition.
+ MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ StringRef Values = A.front().front().getString();
+ for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
+ MCAsmMacroArgument Arg;
+ Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
+
+ // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
+ // This is undocumented, but GAS seems to support it.
+ if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
+ return true;
+ }
+
+ instantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
+ if (ActiveMacros.empty())
+ return TokError("unmatched '.endr' directive");
+
+ // The only .repl that should get here are the ones created by
+ // instantiateMacroLikeBody.
+ assert(getLexer().is(AsmToken::EndOfStatement));
+
+ handleMacroExit();
+ return false;
+}
+
+bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
+ size_t Len) {
+ const MCExpr *Value;
+ SMLoc ExprLoc = getLexer().getLoc();
+ if (parseExpression(Value))
+ return true;
+ const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
+ if (!MCE)
+ return Error(ExprLoc, "unexpected expression in _emit");
+ uint64_t IntValue = MCE->getValue();
+ if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
+ return Error(ExprLoc, "literal value out of range for directive");
+
+ Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
+ return false;
+}
+
+bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
+ const MCExpr *Value;
+ SMLoc ExprLoc = getLexer().getLoc();
+ if (parseExpression(Value))
+ return true;
+ const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
+ if (!MCE)
+ return Error(ExprLoc, "unexpected expression in align");
+ uint64_t IntValue = MCE->getValue();
+ if (!isPowerOf2_64(IntValue))
+ return Error(ExprLoc, "literal value not a power of two greater then zero");
+
+ Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
+ return false;
+}
+
+// We are comparing pointers, but the pointers are relative to a single string.
+// Thus, this should always be deterministic.
+static int rewritesSort(const AsmRewrite *AsmRewriteA,
+ const AsmRewrite *AsmRewriteB) {
+ if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
+ return -1;
+ if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
+ return 1;
+
+ // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
+ // rewrite to the same location. Make sure the SizeDirective rewrite is
+ // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
+ // ensures the sort algorithm is stable.
+ if (AsmRewritePrecedence[AsmRewriteA->Kind] >
+ AsmRewritePrecedence[AsmRewriteB->Kind])
+ return -1;
+
+ if (AsmRewritePrecedence[AsmRewriteA->Kind] <
+ AsmRewritePrecedence[AsmRewriteB->Kind])
+ return 1;
+ llvm_unreachable("Unstable rewrite sort.");
+}
+
+bool AsmParser::parseMSInlineAsm(
+ void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
+ unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool> > &OpDecls,
+ SmallVectorImpl<std::string> &Constraints,
+ SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
+ const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
+ SmallVector<void *, 4> InputDecls;
+ SmallVector<void *, 4> OutputDecls;
+ SmallVector<bool, 4> InputDeclsAddressOf;
+ SmallVector<bool, 4> OutputDeclsAddressOf;
+ SmallVector<std::string, 4> InputConstraints;
+ SmallVector<std::string, 4> OutputConstraints;
+ SmallVector<unsigned, 4> ClobberRegs;
+
+ SmallVector<AsmRewrite, 4> AsmStrRewrites;
+
+ // Prime the lexer.
+ Lex();
+
+ // While we have input, parse each statement.
+ unsigned InputIdx = 0;
+ unsigned OutputIdx = 0;
+ while (getLexer().isNot(AsmToken::Eof)) {
+ ParseStatementInfo Info(&AsmStrRewrites);
+ if (parseStatement(Info, &SI))
+ return true;
+
+ if (Info.ParseError)
+ return true;
+
+ if (Info.Opcode == ~0U)
+ continue;
+
+ const MCInstrDesc &Desc = MII->get(Info.Opcode);
+
+ // Build the list of clobbers, outputs and inputs.
+ for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
+ MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
+
+ // Immediate.
+ if (Operand.isImm())
+ continue;
+
+ // Register operand.
+ if (Operand.isReg() && !Operand.needAddressOf() &&
+ !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
+ unsigned NumDefs = Desc.getNumDefs();
+ // Clobber.
+ if (NumDefs && Operand.getMCOperandNum() < NumDefs)
+ ClobberRegs.push_back(Operand.getReg());
+ continue;
+ }
+
+ // Expr/Input or Output.
+ StringRef SymName = Operand.getSymName();
+ if (SymName.empty())
+ continue;
+
+ void *OpDecl = Operand.getOpDecl();
+ if (!OpDecl)
+ continue;
+
+ bool isOutput = (i == 1) && Desc.mayStore();
+ SMLoc Start = SMLoc::getFromPointer(SymName.data());
+ if (isOutput) {
+ ++InputIdx;
+ OutputDecls.push_back(OpDecl);
+ OutputDeclsAddressOf.push_back(Operand.needAddressOf());
+ OutputConstraints.push_back(("=" + Operand.getConstraint()).str());
+ AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
+ } else {
+ InputDecls.push_back(OpDecl);
+ InputDeclsAddressOf.push_back(Operand.needAddressOf());
+ InputConstraints.push_back(Operand.getConstraint().str());
+ AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
+ }
+ }
+
+ // Consider implicit defs to be clobbers. Think of cpuid and push.
+ ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
+ Desc.getNumImplicitDefs());
+ ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end());
+ }
+
+ // Set the number of Outputs and Inputs.
+ NumOutputs = OutputDecls.size();
+ NumInputs = InputDecls.size();
+
+ // Set the unique clobbers.
+ array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
+ ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
+ ClobberRegs.end());
+ Clobbers.assign(ClobberRegs.size(), std::string());
+ for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
+ raw_string_ostream OS(Clobbers[I]);
+ IP->printRegName(OS, ClobberRegs[I]);
+ }
+
+ // Merge the various outputs and inputs. Output are expected first.
+ if (NumOutputs || NumInputs) {
+ unsigned NumExprs = NumOutputs + NumInputs;
+ OpDecls.resize(NumExprs);
+ Constraints.resize(NumExprs);
+ for (unsigned i = 0; i < NumOutputs; ++i) {
+ OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
+ Constraints[i] = OutputConstraints[i];
+ }
+ for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
+ OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
+ Constraints[j] = InputConstraints[i];
+ }
+ }
+
+ // Build the IR assembly string.
+ std::string AsmStringIR;
+ raw_string_ostream OS(AsmStringIR);
+ StringRef ASMString =
+ SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
+ const char *AsmStart = ASMString.begin();
+ const char *AsmEnd = ASMString.end();
+ array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
+ for (const AsmRewrite &AR : AsmStrRewrites) {
+ AsmRewriteKind Kind = AR.Kind;
+ if (Kind == AOK_Delete)
+ continue;
+
+ const char *Loc = AR.Loc.getPointer();
+ assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
+
+ // Emit everything up to the immediate/expression.
+ if (unsigned Len = Loc - AsmStart)
+ OS << StringRef(AsmStart, Len);
+
+ // Skip the original expression.
+ if (Kind == AOK_Skip) {
+ AsmStart = Loc + AR.Len;
+ continue;
+ }
+
+ unsigned AdditionalSkip = 0;
+ // Rewrite expressions in $N notation.
+ switch (Kind) {
+ default:
+ break;
+ case AOK_Imm:
+ OS << "$$" << AR.Val;
+ break;
+ case AOK_ImmPrefix:
+ OS << "$$";
+ break;
+ case AOK_Label:
+ OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
+ break;
+ case AOK_Input:
+ OS << '$' << InputIdx++;
+ break;
+ case AOK_Output:
+ OS << '$' << OutputIdx++;
+ break;
+ case AOK_SizeDirective:
+ switch (AR.Val) {
+ default: break;
+ case 8: OS << "byte ptr "; break;
+ case 16: OS << "word ptr "; break;
+ case 32: OS << "dword ptr "; break;
+ case 64: OS << "qword ptr "; break;
+ case 80: OS << "xword ptr "; break;
+ case 128: OS << "xmmword ptr "; break;
+ case 256: OS << "ymmword ptr "; break;
+ }
+ break;
+ case AOK_Emit:
+ OS << ".byte";
+ break;
+ case AOK_Align: {
+ // MS alignment directives are measured in bytes. If the native assembler
+ // measures alignment in bytes, we can pass it straight through.
+ OS << ".align";
+ if (getContext().getAsmInfo()->getAlignmentIsInBytes())
+ break;
+
+ // Alignment is in log2 form, so print that instead and skip the original
+ // immediate.
+ unsigned Val = AR.Val;
+ OS << ' ' << Val;
+ assert(Val < 10 && "Expected alignment less then 2^10.");
+ AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
+ break;
+ }
+ case AOK_EVEN:
+ OS << ".even";
+ break;
+ case AOK_DotOperator:
+ // Insert the dot if the user omitted it.
+ OS.flush();
+ if (AsmStringIR.back() != '.')
+ OS << '.';
+ OS << AR.Val;
+ break;
+ }
+
+ // Skip the original expression.
+ AsmStart = Loc + AR.Len + AdditionalSkip;
+ }
+
+ // Emit the remainder of the asm string.
+ if (AsmStart != AsmEnd)
+ OS << StringRef(AsmStart, AsmEnd - AsmStart);
+
+ AsmString = OS.str();
+ return false;
+}
+
+namespace llvm {
+namespace MCParserUtils {
+
+/// Returns whether the given symbol is used anywhere in the given expression,
+/// or subexpressions.
+static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) {
+ switch (Value->getKind()) {
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
+ return isSymbolUsedInExpression(Sym, BE->getLHS()) ||
+ isSymbolUsedInExpression(Sym, BE->getRHS());
+ }
+ case MCExpr::Target:
+ case MCExpr::Constant:
+ return false;
+ case MCExpr::SymbolRef: {
+ const MCSymbol &S =
+ static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
+ if (S.isVariable())
+ return isSymbolUsedInExpression(Sym, S.getVariableValue());
+ return &S == Sym;
+ }
+ case MCExpr::Unary:
+ return isSymbolUsedInExpression(
+ Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
+ }
+
+ llvm_unreachable("Unknown expr kind!");
+}
+
+bool parseAssignmentExpression(StringRef Name, bool allow_redef,
+ MCAsmParser &Parser, MCSymbol *&Sym,
+ const MCExpr *&Value) {
+ MCAsmLexer &Lexer = Parser.getLexer();
+
+ // FIXME: Use better location, we should use proper tokens.
+ SMLoc EqualLoc = Lexer.getLoc();
+
+ if (Parser.parseExpression(Value)) {
+ Parser.TokError("missing expression");
+ Parser.eatToEndOfStatement();
+ return true;
+ }
+
+ // Note: we don't count b as used in "a = b". This is to allow
+ // a = b
+ // b = c
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return Parser.TokError("unexpected token in assignment");
+
+ // Eat the end of statement marker.
+ Parser.Lex();
+
+ // Validate that the LHS is allowed to be a variable (either it has not been
+ // used as a symbol, or it is an absolute symbol).
+ Sym = Parser.getContext().lookupSymbol(Name);
+ if (Sym) {
+ // Diagnose assignment to a label.
+ //
+ // FIXME: Diagnostics. Note the location of the definition as a label.
+ // FIXME: Diagnose assignment to protected identifier (e.g., register name).
+ if (isSymbolUsedInExpression(Sym, Value))
+ return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'");
+ else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() &&
+ !Sym->isVariable())
+ ; // Allow redefinitions of undefined symbols only used in directives.
+ else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
+ ; // Allow redefinitions of variables that haven't yet been used.
+ else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
+ return Parser.Error(EqualLoc, "redefinition of '" + Name + "'");
+ else if (!Sym->isVariable())
+ return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'");
+ else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
+ return Parser.Error(EqualLoc,
+ "invalid reassignment of non-absolute variable '" +
+ Name + "'");
+ } else if (Name == ".") {
+ Parser.getStreamer().emitValueToOffset(Value, 0);
+ return false;
+ } else
+ Sym = Parser.getContext().getOrCreateSymbol(Name);
+
+ Sym->setRedefinable(allow_redef);
+
+ return false;
+}
+
+} // namespace MCParserUtils
+} // namespace llvm
+
+/// \brief Create an MCAsmParser instance.
+MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
+ MCStreamer &Out, const MCAsmInfo &MAI) {
+ return new AsmParser(SM, C, Out, MAI);
+}
diff --git a/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp
new file mode 100644
index 0000000..a4b2b19
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/COFFAsmParser.cpp
@@ -0,0 +1,796 @@
+//===- COFFAsmParser.cpp - COFF Assembly Parser ---------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/COFF.h"
+using namespace llvm;
+
+namespace {
+
+class COFFAsmParser : public MCAsmParserExtension {
+ template<bool (COFFAsmParser::*HandlerMethod)(StringRef, SMLoc)>
+ void addDirectiveHandler(StringRef Directive) {
+ MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
+ this, HandleDirective<COFFAsmParser, HandlerMethod>);
+ getParser().addDirectiveHandler(Directive, Handler);
+ }
+
+ bool ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind);
+
+ bool ParseSectionSwitch(StringRef Section, unsigned Characteristics,
+ SectionKind Kind, StringRef COMDATSymName,
+ COFF::COMDATType Type);
+
+ bool ParseSectionName(StringRef &SectionName);
+ bool ParseSectionFlags(StringRef FlagsString, unsigned* Flags);
+
+ void Initialize(MCAsmParser &Parser) override {
+ // Call the base implementation.
+ MCAsmParserExtension::Initialize(Parser);
+
+ addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveText>(".text");
+ addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveData>(".data");
+ addDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSection>(".section");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveDef>(".def");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecRel32>(".secrel32");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecIdx>(".secidx");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSafeSEH>(".safeseh");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveLinkOnce>(".linkonce");
+
+ // Win64 EH directives.
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartProc>(
+ ".seh_proc");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProc>(
+ ".seh_endproc");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartChained>(
+ ".seh_startchained");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndChained>(
+ ".seh_endchained");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandler>(
+ ".seh_handler");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandlerData>(
+ ".seh_handlerdata");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushReg>(
+ ".seh_pushreg");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSetFrame>(
+ ".seh_setframe");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveAllocStack>(
+ ".seh_stackalloc");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveReg>(
+ ".seh_savereg");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveXMM>(
+ ".seh_savexmm");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushFrame>(
+ ".seh_pushframe");
+ addDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProlog>(
+ ".seh_endprologue");
+ addDirectiveHandler<&COFFAsmParser::ParseDirectiveSymbolAttribute>(".weak");
+ }
+
+ bool ParseSectionDirectiveText(StringRef, SMLoc) {
+ return ParseSectionSwitch(".text",
+ COFF::IMAGE_SCN_CNT_CODE
+ | COFF::IMAGE_SCN_MEM_EXECUTE
+ | COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getText());
+ }
+ bool ParseSectionDirectiveData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getData());
+ }
+ bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".bss",
+ COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA
+ | COFF::IMAGE_SCN_MEM_READ
+ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getBSS());
+ }
+
+ bool ParseDirectiveSection(StringRef, SMLoc);
+ bool ParseDirectiveDef(StringRef, SMLoc);
+ bool ParseDirectiveScl(StringRef, SMLoc);
+ bool ParseDirectiveType(StringRef, SMLoc);
+ bool ParseDirectiveEndef(StringRef, SMLoc);
+ bool ParseDirectiveSecRel32(StringRef, SMLoc);
+ bool ParseDirectiveSecIdx(StringRef, SMLoc);
+ bool ParseDirectiveSafeSEH(StringRef, SMLoc);
+ bool parseCOMDATType(COFF::COMDATType &Type);
+ bool ParseDirectiveLinkOnce(StringRef, SMLoc);
+
+ // Win64 EH directives.
+ bool ParseSEHDirectiveStartProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProc(StringRef, SMLoc);
+ bool ParseSEHDirectiveStartChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndChained(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandler(StringRef, SMLoc);
+ bool ParseSEHDirectiveHandlerData(StringRef, SMLoc);
+ bool ParseSEHDirectivePushReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSetFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveAllocStack(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveReg(StringRef, SMLoc);
+ bool ParseSEHDirectiveSaveXMM(StringRef, SMLoc);
+ bool ParseSEHDirectivePushFrame(StringRef, SMLoc);
+ bool ParseSEHDirectiveEndProlog(StringRef, SMLoc);
+
+ bool ParseAtUnwindOrAtExcept(bool &unwind, bool &except);
+ bool ParseSEHRegisterNumber(unsigned &RegNo);
+ bool ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc);
+public:
+ COFFAsmParser() {}
+};
+
+} // end annonomous namespace.
+
+static SectionKind computeSectionKind(unsigned Flags) {
+ if (Flags & COFF::IMAGE_SCN_MEM_EXECUTE)
+ return SectionKind::getText();
+ if (Flags & COFF::IMAGE_SCN_MEM_READ &&
+ (Flags & COFF::IMAGE_SCN_MEM_WRITE) == 0)
+ return SectionKind::getReadOnly();
+ return SectionKind::getData();
+}
+
+bool COFFAsmParser::ParseSectionFlags(StringRef FlagsString, unsigned* Flags) {
+ enum {
+ None = 0,
+ Alloc = 1 << 0,
+ Code = 1 << 1,
+ Load = 1 << 2,
+ InitData = 1 << 3,
+ Shared = 1 << 4,
+ NoLoad = 1 << 5,
+ NoRead = 1 << 6,
+ NoWrite = 1 << 7
+ };
+
+ bool ReadOnlyRemoved = false;
+ unsigned SecFlags = None;
+
+ for (char FlagChar : FlagsString) {
+ switch (FlagChar) {
+ case 'a':
+ // Ignored.
+ break;
+
+ case 'b': // bss section
+ SecFlags |= Alloc;
+ if (SecFlags & InitData)
+ return TokError("conflicting section flags 'b' and 'd'.");
+ SecFlags &= ~Load;
+ break;
+
+ case 'd': // data section
+ SecFlags |= InitData;
+ if (SecFlags & Alloc)
+ return TokError("conflicting section flags 'b' and 'd'.");
+ SecFlags &= ~NoWrite;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 'n': // section is not loaded
+ SecFlags |= NoLoad;
+ SecFlags &= ~Load;
+ break;
+
+ case 'r': // read-only
+ ReadOnlyRemoved = false;
+ SecFlags |= NoWrite;
+ if ((SecFlags & Code) == 0)
+ SecFlags |= InitData;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 's': // shared section
+ SecFlags |= Shared | InitData;
+ SecFlags &= ~NoWrite;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ break;
+
+ case 'w': // writable
+ SecFlags &= ~NoWrite;
+ ReadOnlyRemoved = true;
+ break;
+
+ case 'x': // executable section
+ SecFlags |= Code;
+ if ((SecFlags & NoLoad) == 0)
+ SecFlags |= Load;
+ if (!ReadOnlyRemoved)
+ SecFlags |= NoWrite;
+ break;
+
+ case 'y': // not readable
+ SecFlags |= NoRead | NoWrite;
+ break;
+
+ default:
+ return TokError("unknown flag");
+ }
+ }
+
+ *Flags = 0;
+
+ if (SecFlags == None)
+ SecFlags = InitData;
+
+ if (SecFlags & Code)
+ *Flags |= COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE;
+ if (SecFlags & InitData)
+ *Flags |= COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
+ if ((SecFlags & Alloc) && (SecFlags & Load) == 0)
+ *Flags |= COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
+ if (SecFlags & NoLoad)
+ *Flags |= COFF::IMAGE_SCN_LNK_REMOVE;
+ if ((SecFlags & NoRead) == 0)
+ *Flags |= COFF::IMAGE_SCN_MEM_READ;
+ if ((SecFlags & NoWrite) == 0)
+ *Flags |= COFF::IMAGE_SCN_MEM_WRITE;
+ if (SecFlags & Shared)
+ *Flags |= COFF::IMAGE_SCN_MEM_SHARED;
+
+ return false;
+}
+
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".weak", ... } [ identifier ( , identifier )* ]
+bool COFFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Directive)
+ .Case(".weak", MCSA_Weak)
+ .Default(MCSA_Invalid);
+ assert(Attr != MCSA_Invalid && "unexpected symbol attribute directive!");
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind) {
+ return ParseSectionSwitch(Section, Characteristics, Kind, "", (COFF::COMDATType)0);
+}
+
+bool COFFAsmParser::ParseSectionSwitch(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName,
+ COFF::COMDATType Type) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in section switching directive");
+ Lex();
+
+ getStreamer().SwitchSection(getContext().getCOFFSection(
+ Section, Characteristics, Kind, COMDATSymName, Type));
+
+ return false;
+}
+
+bool COFFAsmParser::ParseSectionName(StringRef &SectionName) {
+ if (!getLexer().is(AsmToken::Identifier))
+ return true;
+
+ SectionName = getTok().getIdentifier();
+ Lex();
+ return false;
+}
+
+// .section name [, "flags"] [, identifier [ identifier ], identifier]
+//
+// Supported flags:
+// a: Ignored.
+// b: BSS section (uninitialized data)
+// d: data section (initialized data)
+// n: Discardable section
+// r: Readable section
+// s: Shared section
+// w: Writable section
+// x: Executable section
+// y: Not-readable section (clears 'r')
+//
+// Subsections are not supported.
+bool COFFAsmParser::ParseDirectiveSection(StringRef, SMLoc) {
+ StringRef SectionName;
+
+ if (ParseSectionName(SectionName))
+ return TokError("expected identifier in directive");
+
+ unsigned Flags = COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in directive");
+
+ StringRef FlagsStr = getTok().getStringContents();
+ Lex();
+
+ if (ParseSectionFlags(FlagsStr, &Flags))
+ return true;
+ }
+
+ COFF::COMDATType Type = (COFF::COMDATType)0;
+ StringRef COMDATSymName;
+ if (getLexer().is(AsmToken::Comma)) {
+ Type = COFF::IMAGE_COMDAT_SELECT_ANY;
+ Lex();
+
+ Flags |= COFF::IMAGE_SCN_LNK_COMDAT;
+
+ if (!getLexer().is(AsmToken::Identifier))
+ return TokError("expected comdat type such as 'discard' or 'largest' "
+ "after protection bits");
+
+ if (parseCOMDATType(Type))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected comma in directive");
+ Lex();
+
+ if (getParser().parseIdentifier(COMDATSymName))
+ return TokError("expected identifier in directive");
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ SectionKind Kind = computeSectionKind(Flags);
+ if (Kind.isText()) {
+ const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
+ if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
+ Flags |= COFF::IMAGE_SCN_MEM_16BIT;
+ }
+ ParseSectionSwitch(SectionName, Flags, Kind, COMDATSymName, Type);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveDef(StringRef, SMLoc) {
+ StringRef SymbolName;
+
+ if (getParser().parseIdentifier(SymbolName))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName);
+
+ getStreamer().BeginCOFFSymbolDef(Sym);
+
+ Lex();
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveScl(StringRef, SMLoc) {
+ int64_t SymbolStorageClass;
+ if (getParser().parseAbsoluteExpression(SymbolStorageClass))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitCOFFSymbolStorageClass(SymbolStorageClass);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
+ int64_t Type;
+ if (getParser().parseAbsoluteExpression(Type))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitCOFFSymbolType(Type);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveEndef(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EndCOFFSymbolDef();
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveSecRel32(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSecRel32(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveSafeSEH(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSafeSEH(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseDirectiveSecIdx(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitCOFFSectionIndex(Symbol);
+ return false;
+}
+
+/// ::= [ identifier ]
+bool COFFAsmParser::parseCOMDATType(COFF::COMDATType &Type) {
+ StringRef TypeId = getTok().getIdentifier();
+
+ Type = StringSwitch<COFF::COMDATType>(TypeId)
+ .Case("one_only", COFF::IMAGE_COMDAT_SELECT_NODUPLICATES)
+ .Case("discard", COFF::IMAGE_COMDAT_SELECT_ANY)
+ .Case("same_size", COFF::IMAGE_COMDAT_SELECT_SAME_SIZE)
+ .Case("same_contents", COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH)
+ .Case("associative", COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE)
+ .Case("largest", COFF::IMAGE_COMDAT_SELECT_LARGEST)
+ .Case("newest", COFF::IMAGE_COMDAT_SELECT_NEWEST)
+ .Default((COFF::COMDATType)0);
+
+ if (Type == 0)
+ return TokError(Twine("unrecognized COMDAT type '" + TypeId + "'"));
+
+ Lex();
+
+ return false;
+}
+
+/// ParseDirectiveLinkOnce
+/// ::= .linkonce [ identifier ]
+bool COFFAsmParser::ParseDirectiveLinkOnce(StringRef, SMLoc Loc) {
+ COFF::COMDATType Type = COFF::IMAGE_COMDAT_SELECT_ANY;
+ if (getLexer().is(AsmToken::Identifier))
+ if (parseCOMDATType(Type))
+ return true;
+
+ const MCSectionCOFF *Current = static_cast<const MCSectionCOFF*>(
+ getStreamer().getCurrentSection().first);
+
+ if (Type == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE)
+ return Error(Loc, "cannot make section associative with .linkonce");
+
+ if (Current->getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT)
+ return Error(Loc, Twine("section '") + Current->getSectionName() +
+ "' is already linkonce");
+
+ Current->setSelection(Type);
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWinCFIStartProc(Symbol);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProc(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWinCFIEndProc();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveStartChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWinCFIStartChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWinCFIEndChained();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandler(StringRef, SMLoc) {
+ StringRef SymbolID;
+ if (getParser().parseIdentifier(SymbolID))
+ return true;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify one or both of @unwind or @except");
+ Lex();
+ bool unwind = false, except = false;
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (ParseAtUnwindOrAtExcept(unwind, except))
+ return true;
+ }
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ MCSymbol *handler = getContext().getOrCreateSymbol(SymbolID);
+
+ Lex();
+ getStreamer().EmitWinEHHandler(handler, unwind, except);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveHandlerData(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWinEHHandlerData();
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushReg(StringRef, SMLoc L) {
+ unsigned Reg = 0;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWinCFIPushReg(Reg);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSetFrame(StringRef, SMLoc L) {
+ unsigned Reg = 0;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify a stack pointer offset");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWinCFISetFrame(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveAllocStack(StringRef, SMLoc) {
+ int64_t Size;
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Size))
+ return true;
+
+ if (Size & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWinCFIAllocStack(Size);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveSaveReg(StringRef, SMLoc L) {
+ unsigned Reg = 0;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Off))
+ return true;
+
+ if (Off & 7)
+ return Error(startLoc, "size is not a multiple of 8");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ // FIXME: Err on %xmm* registers
+ getStreamer().EmitWinCFISaveReg(Reg, Off);
+ return false;
+}
+
+// FIXME: This method is inherently x86-specific. It should really be in the
+// x86 backend.
+bool COFFAsmParser::ParseSEHDirectiveSaveXMM(StringRef, SMLoc L) {
+ unsigned Reg = 0;
+ int64_t Off;
+ if (ParseSEHRegisterNumber(Reg))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("you must specify an offset on the stack");
+
+ Lex();
+ SMLoc startLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Off))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ if (Off & 0x0F)
+ return Error(startLoc, "offset is not a multiple of 16");
+
+ Lex();
+ // FIXME: Err on non-%xmm* registers
+ getStreamer().EmitWinCFISaveXMM(Reg, Off);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectivePushFrame(StringRef, SMLoc) {
+ bool Code = false;
+ StringRef CodeID;
+ if (getLexer().is(AsmToken::At)) {
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (!getParser().parseIdentifier(CodeID)) {
+ if (CodeID != "code")
+ return Error(startLoc, "expected @code");
+ Code = true;
+ }
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ Lex();
+ getStreamer().EmitWinCFIPushFrame(Code);
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) {
+ Lex();
+ getStreamer().EmitWinCFIEndProlog();
+ return false;
+}
+
+bool COFFAsmParser::ParseAtUnwindOrAtExcept(bool &unwind, bool &except) {
+ StringRef identifier;
+ if (getLexer().isNot(AsmToken::At))
+ return TokError("a handler attribute must begin with '@'");
+ SMLoc startLoc = getLexer().getLoc();
+ Lex();
+ if (getParser().parseIdentifier(identifier))
+ return Error(startLoc, "expected @unwind or @except");
+ if (identifier == "unwind")
+ unwind = true;
+ else if (identifier == "except")
+ except = true;
+ else
+ return Error(startLoc, "expected @unwind or @except");
+ return false;
+}
+
+bool COFFAsmParser::ParseSEHRegisterNumber(unsigned &RegNo) {
+ SMLoc startLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Percent)) {
+ const MCRegisterInfo *MRI = getContext().getRegisterInfo();
+ SMLoc endLoc;
+ unsigned LLVMRegNo;
+ if (getParser().getTargetParser().ParseRegister(LLVMRegNo,startLoc,endLoc))
+ return true;
+
+#if 0
+ // FIXME: TargetAsmInfo::getCalleeSavedRegs() commits a serious layering
+ // violation so this validation code is disabled.
+
+ // Check that this is a non-volatile register.
+ const unsigned *NVRegs = TAI.getCalleeSavedRegs();
+ unsigned i;
+ for (i = 0; NVRegs[i] != 0; ++i)
+ if (NVRegs[i] == LLVMRegNo)
+ break;
+ if (NVRegs[i] == 0)
+ return Error(startLoc, "expected non-volatile register");
+#endif
+
+ int SEHRegNo = MRI->getSEHRegNum(LLVMRegNo);
+ if (SEHRegNo < 0)
+ return Error(startLoc,"register can't be represented in SEH unwind info");
+ RegNo = SEHRegNo;
+ }
+ else {
+ int64_t n;
+ if (getParser().parseAbsoluteExpression(n))
+ return true;
+ if (n > 15)
+ return Error(startLoc, "register number is too high");
+ RegNo = n;
+ }
+
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createCOFFAsmParser() {
+ return new COFFAsmParser;
+}
+
+}
diff --git a/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
new file mode 100644
index 0000000..73e068a
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
@@ -0,0 +1,967 @@
+//===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+using namespace llvm;
+
+namespace {
+
+/// \brief Implementation of directive handling which is shared across all
+/// Darwin targets.
+class DarwinAsmParser : public MCAsmParserExtension {
+ template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
+ void addDirectiveHandler(StringRef Directive) {
+ MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
+ this, HandleDirective<DarwinAsmParser, HandlerMethod>);
+ getParser().addDirectiveHandler(Directive, Handler);
+ }
+
+ bool parseSectionSwitch(const char *Segment, const char *Section,
+ unsigned TAA = 0, unsigned ImplicitAlign = 0,
+ unsigned StubSize = 0);
+
+ SMLoc LastVersionMinDirective;
+
+public:
+ DarwinAsmParser() {}
+
+ void Initialize(MCAsmParser &Parser) override {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
+ ".indirect_symbol");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
+ ".subsections_via_symbols");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
+ ".pushsection");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
+ ".popsection");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
+ ".secure_log_unique");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
+ ".secure_log_reset");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
+
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
+ ".data_region");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
+ ".end_data_region");
+
+ // Special section directives.
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
+ ".const_data");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
+ ".constructor");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
+ ".cstring");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
+ ".destructor");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
+ ".fvmlib_init0");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
+ ".fvmlib_init1");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
+ ".lazy_symbol_pointer");
+ addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
+ ".linker_option");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
+ ".literal16");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
+ ".literal4");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
+ ".literal8");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
+ ".mod_init_func");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
+ ".mod_term_func");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
+ ".non_lazy_symbol_pointer");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
+ ".objc_cat_cls_meth");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
+ ".objc_cat_inst_meth");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
+ ".objc_category");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
+ ".objc_class");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
+ ".objc_class_names");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
+ ".objc_class_vars");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
+ ".objc_cls_meth");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
+ ".objc_cls_refs");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
+ ".objc_inst_meth");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
+ ".objc_instance_vars");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
+ ".objc_message_refs");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
+ ".objc_meta_class");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
+ ".objc_meth_var_names");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
+ ".objc_meth_var_types");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
+ ".objc_module_info");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
+ ".objc_protocol");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
+ ".objc_selector_strs");
+ addDirectiveHandler<
+ &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
+ ".objc_string_object");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
+ ".objc_symbols");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
+ ".picsymbol_stub");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
+ ".static_const");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
+ ".static_data");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
+ ".symbol_stub");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
+ ".thread_init_func");
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
+
+ addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
+ addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(
+ ".watchos_version_min");
+ addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(".tvos_version_min");
+ addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(".ios_version_min");
+ addDirectiveHandler<&DarwinAsmParser::parseVersionMin>(
+ ".macosx_version_min");
+
+ LastVersionMinDirective = SMLoc();
+ }
+
+ bool parseDirectiveDesc(StringRef, SMLoc);
+ bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
+ bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
+ bool parseDirectiveLsym(StringRef, SMLoc);
+ bool parseDirectiveLinkerOption(StringRef, SMLoc);
+ bool parseDirectiveSection(StringRef, SMLoc);
+ bool parseDirectivePushSection(StringRef, SMLoc);
+ bool parseDirectivePopSection(StringRef, SMLoc);
+ bool parseDirectivePrevious(StringRef, SMLoc);
+ bool parseDirectiveSecureLogReset(StringRef, SMLoc);
+ bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
+ bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
+ bool parseDirectiveTBSS(StringRef, SMLoc);
+ bool parseDirectiveZerofill(StringRef, SMLoc);
+ bool parseDirectiveDataRegion(StringRef, SMLoc);
+ bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
+
+ // Named Section Directive
+ bool parseSectionDirectiveBss(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__bss");
+ }
+
+ bool parseSectionDirectiveConst(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__const");
+ }
+ bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__static_const");
+ }
+ bool parseSectionDirectiveCString(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__cstring",
+ MachO::S_CSTRING_LITERALS);
+ }
+ bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__literal4",
+ MachO::S_4BYTE_LITERALS, 4);
+ }
+ bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__literal8",
+ MachO::S_8BYTE_LITERALS, 8);
+ }
+ bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__literal16",
+ MachO::S_16BYTE_LITERALS, 16);
+ }
+ bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__constructor");
+ }
+ bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__destructor");
+ }
+ bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__fvmlib_init0");
+ }
+ bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__fvmlib_init1");
+ }
+ bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__symbol_stub",
+ MachO::S_SYMBOL_STUBS |
+ MachO::S_ATTR_PURE_INSTRUCTIONS,
+ // FIXME: Different on PPC and ARM.
+ 0, 16);
+ }
+ bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT","__picsymbol_stub",
+ MachO::S_SYMBOL_STUBS |
+ MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
+ }
+ bool parseSectionDirectiveData(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__data");
+ }
+ bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__static_data");
+ }
+ bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
+ MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
+ }
+ bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__la_symbol_ptr",
+ MachO::S_LAZY_SYMBOL_POINTERS, 4);
+ }
+ bool parseSectionDirectiveDyld(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__dyld");
+ }
+ bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__mod_init_func",
+ MachO::S_MOD_INIT_FUNC_POINTERS, 4);
+ }
+ bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__mod_term_func",
+ MachO::S_MOD_TERM_FUNC_POINTERS, 4);
+ }
+ bool parseSectionDirectiveConstData(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__const");
+ }
+ bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__class",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__meta_class",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__cat_cls_meth",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__cat_inst_meth",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__protocol",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__string_object",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__cls_meth",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__inst_meth",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__cls_refs",
+ MachO::S_ATTR_NO_DEAD_STRIP |
+ MachO::S_LITERAL_POINTERS, 4);
+ }
+ bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__message_refs",
+ MachO::S_ATTR_NO_DEAD_STRIP |
+ MachO::S_LITERAL_POINTERS, 4);
+ }
+ bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__symbols",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__category",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__class_vars",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__instance_vars",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__module_info",
+ MachO::S_ATTR_NO_DEAD_STRIP);
+ }
+ bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__cstring",
+ MachO::S_CSTRING_LITERALS);
+ }
+ bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__cstring",
+ MachO::S_CSTRING_LITERALS);
+ }
+ bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__cstring",
+ MachO::S_CSTRING_LITERALS);
+ }
+ bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
+ return parseSectionSwitch("__OBJC", "__selector_strs",
+ MachO::S_CSTRING_LITERALS);
+ }
+ bool parseSectionDirectiveTData(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__thread_data",
+ MachO::S_THREAD_LOCAL_REGULAR);
+ }
+ bool parseSectionDirectiveText(StringRef, SMLoc) {
+ return parseSectionSwitch("__TEXT", "__text",
+ MachO::S_ATTR_PURE_INSTRUCTIONS);
+ }
+ bool parseSectionDirectiveTLV(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__thread_vars",
+ MachO::S_THREAD_LOCAL_VARIABLES);
+ }
+ bool parseSectionDirectiveIdent(StringRef, SMLoc) {
+ // Darwin silently ignores the .ident directive.
+ getParser().eatToEndOfStatement();
+ return false;
+ }
+ bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
+ return parseSectionSwitch("__DATA", "__thread_init",
+ MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
+ }
+ bool parseVersionMin(StringRef, SMLoc);
+
+};
+
+} // end anonymous namespace
+
+bool DarwinAsmParser::parseSectionSwitch(const char *Segment,
+ const char *Section,
+ unsigned TAA, unsigned Align,
+ unsigned StubSize) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in section switching directive");
+ Lex();
+
+ // FIXME: Arch specific.
+ bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
+ getStreamer().SwitchSection(getContext().getMachOSection(
+ Segment, Section, TAA, StubSize,
+ isText ? SectionKind::getText() : SectionKind::getData()));
+
+ // Set the implicit alignment, if any.
+ //
+ // FIXME: This isn't really what 'as' does; I think it just uses the implicit
+ // alignment on the section (e.g., if one manually inserts bytes into the
+ // section, then just issuing the section switch directive will not realign
+ // the section. However, this is arguably more reasonable behavior, and there
+ // is no good reason for someone to intentionally emit incorrectly sized
+ // values into the implicitly aligned sections.
+ if (Align)
+ getStreamer().EmitValueToAlignment(Align);
+
+ return false;
+}
+
+/// parseDirectiveDesc
+/// ::= .desc identifier , expression
+bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.desc' directive");
+ Lex();
+
+ int64_t DescValue;
+ if (getParser().parseAbsoluteExpression(DescValue))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.desc' directive");
+
+ Lex();
+
+ // Set the n_desc field of this Symbol to this DescValue
+ getStreamer().EmitSymbolDesc(Sym, DescValue);
+
+ return false;
+}
+
+/// parseDirectiveIndirectSymbol
+/// ::= .indirect_symbol identifier
+bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
+ const MCSectionMachO *Current = static_cast<const MCSectionMachO*>(
+ getStreamer().getCurrentSection().first);
+ MachO::SectionType SectionType = Current->getType();
+ if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
+ SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
+ SectionType != MachO::S_SYMBOL_STUBS)
+ return Error(Loc, "indirect symbol not in a symbol pointer or stub "
+ "section");
+
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in .indirect_symbol directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ // Assembler local symbols don't make any sense here. Complain loudly.
+ if (Sym->isTemporary())
+ return TokError("non-local symbol required in directive");
+
+ if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
+ return TokError("unable to emit indirect symbol attribute for: " + Name);
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.indirect_symbol' directive");
+
+ Lex();
+
+ return false;
+}
+
+/// parseDirectiveDumpOrLoad
+/// ::= ( .dump | .load ) "filename"
+bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
+ SMLoc IDLoc) {
+ bool IsDump = Directive == ".dump";
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.dump' or '.load' directive");
+
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.dump' or '.load' directive");
+
+ Lex();
+
+ // FIXME: If/when .dump and .load are implemented they will be done in the
+ // the assembly parser and not have any need for an MCStreamer API.
+ if (IsDump)
+ return Warning(IDLoc, "ignoring directive .dump for now");
+ else
+ return Warning(IDLoc, "ignoring directive .load for now");
+}
+
+/// ParseDirectiveLinkerOption
+/// ::= .linker_option "string" ( , "string" )*
+bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
+ SmallVector<std::string, 4> Args;
+ for (;;) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '" + Twine(IDVal) + "' directive");
+
+ std::string Data;
+ if (getParser().parseEscapedString(Data))
+ return true;
+
+ Args.push_back(Data);
+
+ Lex();
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
+ Lex();
+ }
+
+ getStreamer().EmitLinkerOptions(Args);
+ return false;
+}
+
+/// parseDirectiveLsym
+/// ::= .lsym identifier , expression
+bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.lsym' directive");
+ Lex();
+
+ const MCExpr *Value;
+ if (getParser().parseExpression(Value))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.lsym' directive");
+
+ Lex();
+
+ // We don't currently support this directive.
+ //
+ // FIXME: Diagnostic location!
+ (void) Sym;
+ return TokError("directive '.lsym' is unsupported");
+}
+
+/// parseDirectiveSection:
+/// ::= .section identifier (',' identifier)*
+bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
+ SMLoc Loc = getLexer().getLoc();
+
+ StringRef SectionName;
+ if (getParser().parseIdentifier(SectionName))
+ return Error(Loc, "expected identifier after '.section' directive");
+
+ // Verify there is a following comma.
+ if (!getLexer().is(AsmToken::Comma))
+ return TokError("unexpected token in '.section' directive");
+
+ std::string SectionSpec = SectionName;
+ SectionSpec += ",";
+
+ // Add all the tokens until the end of the line, ParseSectionSpecifier will
+ // handle this.
+ StringRef EOL = getLexer().LexUntilEndOfStatement();
+ SectionSpec.append(EOL.begin(), EOL.end());
+
+ Lex();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.section' directive");
+ Lex();
+
+
+ StringRef Segment, Section;
+ unsigned StubSize;
+ unsigned TAA;
+ bool TAAParsed;
+ std::string ErrorStr =
+ MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
+ TAA, TAAParsed, StubSize);
+
+ if (!ErrorStr.empty())
+ return Error(Loc, ErrorStr.c_str());
+
+ // Issue a warning if the target is not powerpc and Section is a *coal* section.
+ Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
+ Triple::ArchType ArchTy = TT.getArch();
+
+ if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
+ StringRef NonCoalSection = StringSwitch<StringRef>(Section)
+ .Case("__textcoal_nt", "__text")
+ .Case("__const_coal", "__const")
+ .Case("__datacoal_nt", "__data")
+ .Default(Section);
+
+ if (!Section.equals(NonCoalSection)) {
+ StringRef SectionVal(Loc.getPointer());
+ size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
+ SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
+ SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
+ getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
+ SMRange(BLoc, ELoc));
+ getParser().Note(Loc, "change section name to \"" + NonCoalSection +
+ "\"", SMRange(BLoc, ELoc));
+ }
+ }
+
+ // FIXME: Arch specific.
+ bool isText = Segment == "__TEXT"; // FIXME: Hack.
+ getStreamer().SwitchSection(getContext().getMachOSection(
+ Segment, Section, TAA, StubSize,
+ isText ? SectionKind::getText() : SectionKind::getData()));
+ return false;
+}
+
+/// ParseDirectivePushSection:
+/// ::= .pushsection identifier (',' identifier)*
+bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
+ getStreamer().PushSection();
+
+ if (parseDirectiveSection(S, Loc)) {
+ getStreamer().PopSection();
+ return true;
+ }
+
+ return false;
+}
+
+/// ParseDirectivePopSection:
+/// ::= .popsection
+bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
+ if (!getStreamer().PopSection())
+ return TokError(".popsection without corresponding .pushsection");
+ return false;
+}
+
+/// ParseDirectivePrevious:
+/// ::= .previous
+bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
+ MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
+ if (!PreviousSection.first)
+ return TokError(".previous without corresponding .section");
+ getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
+ return false;
+}
+
+/// ParseDirectiveSecureLogUnique
+/// ::= .secure_log_unique ... message ...
+bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
+ StringRef LogMessage = getParser().parseStringToEndOfStatement();
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.secure_log_unique' directive");
+
+ if (getContext().getSecureLogUsed())
+ return Error(IDLoc, ".secure_log_unique specified multiple times");
+
+ // Get the secure log path.
+ const char *SecureLogFile = getContext().getSecureLogFile();
+ if (!SecureLogFile)
+ return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
+ "environment variable unset.");
+
+ // Open the secure log file if we haven't already.
+ raw_fd_ostream *OS = getContext().getSecureLog();
+ if (!OS) {
+ std::error_code EC;
+ auto NewOS = llvm::make_unique<raw_fd_ostream>(
+ SecureLogFile, EC, sys::fs::F_Append | sys::fs::F_Text);
+ if (EC)
+ return Error(IDLoc, Twine("can't open secure log file: ") +
+ SecureLogFile + " (" + EC.message() + ")");
+ OS = NewOS.get();
+ getContext().setSecureLog(std::move(NewOS));
+ }
+
+ // Write the message.
+ unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
+ *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
+ << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
+ << LogMessage + "\n";
+
+ getContext().setSecureLogUsed(true);
+
+ return false;
+}
+
+/// ParseDirectiveSecureLogReset
+/// ::= .secure_log_reset
+bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.secure_log_reset' directive");
+
+ Lex();
+
+ getContext().setSecureLogUsed(false);
+
+ return false;
+}
+
+/// parseDirectiveSubsectionsViaSymbols
+/// ::= .subsections_via_symbols
+bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.subsections_via_symbols' directive");
+
+ Lex();
+
+ getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+
+ return false;
+}
+
+/// ParseDirectiveTBSS
+/// ::= .tbss identifier, size, align
+bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.tbss' directive");
+
+ Lex();
+
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
+ "zero");
+
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
+ "than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
+ "__DATA", "__thread_bss",
+ MachO::S_THREAD_LOCAL_ZEROFILL,
+ 0, SectionKind::getThreadBSS()),
+ Sym, Size, 1 << Pow2Alignment);
+
+ return false;
+}
+
+/// ParseDirectiveZerofill
+/// ::= .zerofill segname , sectname [, identifier , size_expression [
+/// , align_expression ]]
+bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
+ StringRef Segment;
+ if (getParser().parseIdentifier(Segment))
+ return TokError("expected segment name after '.zerofill' directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ StringRef Section;
+ if (getParser().parseIdentifier(Section))
+ return TokError("expected section name after comma in '.zerofill' "
+ "directive");
+
+ // If this is the end of the line all that was wanted was to create the
+ // the section but with no symbol.
+ if (getLexer().is(AsmToken::EndOfStatement)) {
+ // Create the zerofill section but no symbol
+ getStreamer().EmitZerofill(getContext().getMachOSection(
+ Segment, Section, MachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()));
+ return false;
+ }
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ SMLoc IDLoc = getLexer().getLoc();
+ StringRef IDStr;
+ if (getParser().parseIdentifier(IDStr))
+ return TokError("expected identifier in directive");
+
+ // handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ int64_t Size;
+ SMLoc SizeLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Size))
+ return true;
+
+ int64_t Pow2Alignment = 0;
+ SMLoc Pow2AlignmentLoc;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ Pow2AlignmentLoc = getLexer().getLoc();
+ if (getParser().parseAbsoluteExpression(Pow2Alignment))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.zerofill' directive");
+
+ Lex();
+
+ if (Size < 0)
+ return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
+ "than zero");
+
+ // NOTE: The alignment in the directive is a power of 2 value, the assembler
+ // may internally end up wanting an alignment in bytes.
+ // FIXME: Diagnose overflow.
+ if (Pow2Alignment < 0)
+ return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
+ "can't be less than zero");
+
+ if (!Sym->isUndefined())
+ return Error(IDLoc, "invalid symbol redefinition");
+
+ // Create the zerofill Symbol with Size and Pow2Alignment
+ //
+ // FIXME: Arch specific.
+ getStreamer().EmitZerofill(getContext().getMachOSection(
+ Segment, Section, MachO::S_ZEROFILL,
+ 0, SectionKind::getBSS()),
+ Sym, Size, 1 << Pow2Alignment);
+
+ return false;
+}
+
+/// ParseDirectiveDataRegion
+/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
+bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
+ if (getLexer().is(AsmToken::EndOfStatement)) {
+ Lex();
+ getStreamer().EmitDataRegion(MCDR_DataRegion);
+ return false;
+ }
+ StringRef RegionType;
+ SMLoc Loc = getParser().getTok().getLoc();
+ if (getParser().parseIdentifier(RegionType))
+ return TokError("expected region type after '.data_region' directive");
+ int Kind = StringSwitch<int>(RegionType)
+ .Case("jt8", MCDR_DataRegionJT8)
+ .Case("jt16", MCDR_DataRegionJT16)
+ .Case("jt32", MCDR_DataRegionJT32)
+ .Default(-1);
+ if (Kind == -1)
+ return Error(Loc, "unknown region type in '.data_region' directive");
+ Lex();
+
+ getStreamer().EmitDataRegion((MCDataRegionType)Kind);
+ return false;
+}
+
+/// ParseDirectiveDataRegionEnd
+/// ::= .end_data_region
+bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.end_data_region' directive");
+
+ Lex();
+ getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
+ return false;
+}
+
+/// parseVersionMin
+/// ::= .ios_version_min major,minor[,update]
+/// ::= .macosx_version_min major,minor[,update]
+bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc) {
+ int64_t Major = 0, Minor = 0, Update = 0;
+ int Kind = StringSwitch<int>(Directive)
+ .Case(".watchos_version_min", MCVM_WatchOSVersionMin)
+ .Case(".tvos_version_min", MCVM_TvOSVersionMin)
+ .Case(".ios_version_min", MCVM_IOSVersionMin)
+ .Case(".macosx_version_min", MCVM_OSXVersionMin);
+ // Get the major version number.
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("invalid OS major version number");
+ Major = getLexer().getTok().getIntVal();
+ if (Major > 65535 || Major <= 0)
+ return TokError("invalid OS major version number");
+ Lex();
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("minor OS version number required, comma expected");
+ Lex();
+ // Get the minor version number.
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("invalid OS minor version number");
+ Minor = getLexer().getTok().getIntVal();
+ if (Minor > 255 || Minor < 0)
+ return TokError("invalid OS minor version number");
+ Lex();
+ // Get the update level, if specified
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("invalid update specifier, comma expected");
+ Lex();
+ if (getLexer().isNot(AsmToken::Integer))
+ return TokError("invalid OS update number");
+ Update = getLexer().getTok().getIntVal();
+ if (Update > 255 || Update < 0)
+ return TokError("invalid OS update number");
+ Lex();
+ }
+
+ const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
+ Triple::OSType ExpectedOS = Triple::UnknownOS;
+ switch ((MCVersionMinType)Kind) {
+ case MCVM_WatchOSVersionMin: ExpectedOS = Triple::WatchOS; break;
+ case MCVM_TvOSVersionMin: ExpectedOS = Triple::TvOS; break;
+ case MCVM_IOSVersionMin: ExpectedOS = Triple::IOS; break;
+ case MCVM_OSXVersionMin: ExpectedOS = Triple::MacOSX; break;
+ }
+ if (T.getOS() != ExpectedOS)
+ Warning(Loc, Directive + " should only be used for " +
+ Triple::getOSTypeName(ExpectedOS) + " targets");
+
+ if (LastVersionMinDirective.isValid()) {
+ Warning(Loc, "overriding previous version_min directive");
+ Note(LastVersionMinDirective, "previous definition is here");
+ }
+ LastVersionMinDirective = Loc;
+
+ // We've parsed a correct version specifier, so send it to the streamer.
+ getStreamer().EmitVersionMin((MCVersionMinType)Kind, Major, Minor, Update);
+
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createDarwinAsmParser() {
+ return new DarwinAsmParser;
+}
+
+} // end llvm namespace
diff --git a/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp
new file mode 100644
index 0000000..6cbcdec
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/ELFAsmParser.cpp
@@ -0,0 +1,738 @@
+//===- ELFAsmParser.cpp - ELF Assembly Parser -----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbolELF.h"
+#include "llvm/Support/ELF.h"
+using namespace llvm;
+
+namespace {
+
+class ELFAsmParser : public MCAsmParserExtension {
+ template<bool (ELFAsmParser::*HandlerMethod)(StringRef, SMLoc)>
+ void addDirectiveHandler(StringRef Directive) {
+ MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
+ this, HandleDirective<ELFAsmParser, HandlerMethod>);
+
+ getParser().addDirectiveHandler(Directive, Handler);
+ }
+
+ bool ParseSectionSwitch(StringRef Section, unsigned Type, unsigned Flags,
+ SectionKind Kind);
+
+public:
+ ELFAsmParser() { BracketExpressionsSupported = true; }
+
+ void Initialize(MCAsmParser &Parser) override {
+ // Call the base implementation.
+ this->MCAsmParserExtension::Initialize(Parser);
+
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveData>(".data");
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveText>(".text");
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveBSS>(".bss");
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveRoData>(".rodata");
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTData>(".tdata");
+ addDirectiveHandler<&ELFAsmParser::ParseSectionDirectiveTBSS>(".tbss");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveDataRel>(".data.rel");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveDataRelRo>(".data.rel.ro");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseSectionDirectiveEhFrame>(".eh_frame");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSection>(".section");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseDirectivePushSection>(".pushsection");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectivePopSection>(".popsection");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSize>(".size");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectivePrevious>(".previous");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveType>(".type");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveIdent>(".ident");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSymver>(".symver");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveVersion>(".version");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveWeakref>(".weakref");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSymbolAttribute>(".weak");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSymbolAttribute>(".local");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".protected");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".internal");
+ addDirectiveHandler<
+ &ELFAsmParser::ParseDirectiveSymbolAttribute>(".hidden");
+ addDirectiveHandler<&ELFAsmParser::ParseDirectiveSubsection>(".subsection");
+ }
+
+ // FIXME: Part of this logic is duplicated in the MCELFStreamer. What is
+ // the best way for us to get access to it?
+ bool ParseSectionDirectiveData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data", ELF::SHT_PROGBITS,
+ ELF::SHF_WRITE | ELF::SHF_ALLOC,
+ SectionKind::getData());
+ }
+ bool ParseSectionDirectiveText(StringRef, SMLoc) {
+ return ParseSectionSwitch(".text", ELF::SHT_PROGBITS,
+ ELF::SHF_EXECINSTR |
+ ELF::SHF_ALLOC, SectionKind::getText());
+ }
+ bool ParseSectionDirectiveBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".bss", ELF::SHT_NOBITS,
+ ELF::SHF_WRITE |
+ ELF::SHF_ALLOC, SectionKind::getBSS());
+ }
+ bool ParseSectionDirectiveRoData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".rodata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+ }
+ bool ParseSectionDirectiveTData(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tdata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_TLS | ELF::SHF_WRITE,
+ SectionKind::getThreadData());
+ }
+ bool ParseSectionDirectiveTBSS(StringRef, SMLoc) {
+ return ParseSectionSwitch(".tbss", ELF::SHT_NOBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_TLS | ELF::SHF_WRITE,
+ SectionKind::getThreadBSS());
+ }
+ bool ParseSectionDirectiveDataRel(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_WRITE,
+ SectionKind::getData());
+ }
+ bool ParseSectionDirectiveDataRelRo(StringRef, SMLoc) {
+ return ParseSectionSwitch(".data.rel.ro", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |
+ ELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRel());
+ }
+ bool ParseSectionDirectiveEhFrame(StringRef, SMLoc) {
+ return ParseSectionSwitch(".eh_frame", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_WRITE,
+ SectionKind::getData());
+ }
+ bool ParseDirectivePushSection(StringRef, SMLoc);
+ bool ParseDirectivePopSection(StringRef, SMLoc);
+ bool ParseDirectiveSection(StringRef, SMLoc);
+ bool ParseDirectiveSize(StringRef, SMLoc);
+ bool ParseDirectivePrevious(StringRef, SMLoc);
+ bool ParseDirectiveType(StringRef, SMLoc);
+ bool ParseDirectiveIdent(StringRef, SMLoc);
+ bool ParseDirectiveSymver(StringRef, SMLoc);
+ bool ParseDirectiveVersion(StringRef, SMLoc);
+ bool ParseDirectiveWeakref(StringRef, SMLoc);
+ bool ParseDirectiveSymbolAttribute(StringRef, SMLoc);
+ bool ParseDirectiveSubsection(StringRef, SMLoc);
+
+private:
+ bool ParseSectionName(StringRef &SectionName);
+ bool ParseSectionArguments(bool IsPush, SMLoc loc);
+ unsigned parseSunStyleSectionFlags();
+};
+
+}
+
+/// ParseDirectiveSymbolAttribute
+/// ::= { ".local", ".weak", ... } [ identifier ( , identifier )* ]
+bool ELFAsmParser::ParseDirectiveSymbolAttribute(StringRef Directive, SMLoc) {
+ MCSymbolAttr Attr = StringSwitch<MCSymbolAttr>(Directive)
+ .Case(".weak", MCSA_Weak)
+ .Case(".local", MCSA_Local)
+ .Case(".hidden", MCSA_Hidden)
+ .Case(".internal", MCSA_Internal)
+ .Case(".protected", MCSA_Protected)
+ .Default(MCSA_Invalid);
+ assert(Attr != MCSA_Invalid && "unexpected symbol attribute directive!");
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ StringRef Name;
+
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+ }
+ }
+
+ Lex();
+ return false;
+}
+
+bool ELFAsmParser::ParseSectionSwitch(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind) {
+ const MCExpr *Subsection = nullptr;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getParser().parseExpression(Subsection))
+ return true;
+ }
+
+ getStreamer().SwitchSection(getContext().getELFSection(Section, Type, Flags),
+ Subsection);
+
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectiveSize(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+ MCSymbolELF *Sym = cast<MCSymbolELF>(getContext().getOrCreateSymbol(Name));
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in directive");
+ Lex();
+
+ const MCExpr *Expr;
+ if (getParser().parseExpression(Expr))
+ return true;
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ getStreamer().emitELFSize(Sym, Expr);
+ return false;
+}
+
+bool ELFAsmParser::ParseSectionName(StringRef &SectionName) {
+ // A section name can contain -, so we cannot just use
+ // parseIdentifier.
+ SMLoc FirstLoc = getLexer().getLoc();
+ unsigned Size = 0;
+
+ if (getLexer().is(AsmToken::String)) {
+ SectionName = getTok().getIdentifier();
+ Lex();
+ return false;
+ }
+
+ for (;;) {
+ unsigned CurSize;
+
+ SMLoc PrevLoc = getLexer().getLoc();
+ if (getLexer().is(AsmToken::Minus)) {
+ CurSize = 1;
+ Lex(); // Consume the "-".
+ } else if (getLexer().is(AsmToken::String)) {
+ CurSize = getTok().getIdentifier().size() + 2;
+ Lex();
+ } else if (getLexer().is(AsmToken::Identifier)) {
+ CurSize = getTok().getIdentifier().size();
+ Lex();
+ } else {
+ break;
+ }
+
+ Size += CurSize;
+ SectionName = StringRef(FirstLoc.getPointer(), Size);
+
+ // Make sure the following token is adjacent.
+ if (PrevLoc.getPointer() + CurSize != getTok().getLoc().getPointer())
+ break;
+ }
+ if (Size == 0)
+ return true;
+
+ return false;
+}
+
+static unsigned parseSectionFlags(StringRef flagsStr, bool *UseLastGroup) {
+ unsigned flags = 0;
+
+ for (unsigned i = 0; i < flagsStr.size(); i++) {
+ switch (flagsStr[i]) {
+ case 'a':
+ flags |= ELF::SHF_ALLOC;
+ break;
+ case 'e':
+ flags |= ELF::SHF_EXCLUDE;
+ break;
+ case 'x':
+ flags |= ELF::SHF_EXECINSTR;
+ break;
+ case 'w':
+ flags |= ELF::SHF_WRITE;
+ break;
+ case 'M':
+ flags |= ELF::SHF_MERGE;
+ break;
+ case 'S':
+ flags |= ELF::SHF_STRINGS;
+ break;
+ case 'T':
+ flags |= ELF::SHF_TLS;
+ break;
+ case 'c':
+ flags |= ELF::XCORE_SHF_CP_SECTION;
+ break;
+ case 'd':
+ flags |= ELF::XCORE_SHF_DP_SECTION;
+ break;
+ case 'G':
+ flags |= ELF::SHF_GROUP;
+ break;
+ case '?':
+ *UseLastGroup = true;
+ break;
+ default:
+ return -1U;
+ }
+ }
+
+ return flags;
+}
+
+unsigned ELFAsmParser::parseSunStyleSectionFlags() {
+ unsigned flags = 0;
+ while (getLexer().is(AsmToken::Hash)) {
+ Lex(); // Eat the #.
+
+ if (!getLexer().is(AsmToken::Identifier))
+ return -1U;
+
+ StringRef flagId = getTok().getIdentifier();
+ if (flagId == "alloc")
+ flags |= ELF::SHF_ALLOC;
+ else if (flagId == "execinstr")
+ flags |= ELF::SHF_EXECINSTR;
+ else if (flagId == "write")
+ flags |= ELF::SHF_WRITE;
+ else if (flagId == "tls")
+ flags |= ELF::SHF_TLS;
+ else
+ return -1U;
+
+ Lex(); // Eat the flag.
+
+ if (!getLexer().is(AsmToken::Comma))
+ break;
+ Lex(); // Eat the comma.
+ }
+ return flags;
+}
+
+
+bool ELFAsmParser::ParseDirectivePushSection(StringRef s, SMLoc loc) {
+ getStreamer().PushSection();
+
+ if (ParseSectionArguments(/*IsPush=*/true, loc)) {
+ getStreamer().PopSection();
+ return true;
+ }
+
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectivePopSection(StringRef, SMLoc) {
+ if (!getStreamer().PopSection())
+ return TokError(".popsection without corresponding .pushsection");
+ return false;
+}
+
+// FIXME: This is a work in progress.
+bool ELFAsmParser::ParseDirectiveSection(StringRef, SMLoc loc) {
+ return ParseSectionArguments(/*IsPush=*/false, loc);
+}
+
+bool ELFAsmParser::ParseSectionArguments(bool IsPush, SMLoc loc) {
+ StringRef SectionName;
+
+ if (ParseSectionName(SectionName))
+ return TokError("expected identifier in directive");
+
+ StringRef TypeName;
+ int64_t Size = 0;
+ StringRef GroupName;
+ unsigned Flags = 0;
+ const MCExpr *Subsection = nullptr;
+ bool UseLastGroup = false;
+ StringRef UniqueStr;
+ int64_t UniqueID = ~0;
+
+ // Set the defaults first.
+ if (SectionName == ".fini" || SectionName == ".init" ||
+ SectionName == ".rodata")
+ Flags |= ELF::SHF_ALLOC;
+ if (SectionName == ".fini" || SectionName == ".init")
+ Flags |= ELF::SHF_EXECINSTR;
+
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (IsPush && getLexer().isNot(AsmToken::String)) {
+ if (getParser().parseExpression(Subsection))
+ return true;
+ if (getLexer().isNot(AsmToken::Comma))
+ goto EndStmt;
+ Lex();
+ }
+
+ unsigned extraFlags;
+
+ if (getLexer().isNot(AsmToken::String)) {
+ if (!getContext().getAsmInfo()->usesSunStyleELFSectionSwitchSyntax()
+ || getLexer().isNot(AsmToken::Hash))
+ return TokError("expected string in directive");
+ extraFlags = parseSunStyleSectionFlags();
+ } else {
+ StringRef FlagsStr = getTok().getStringContents();
+ Lex();
+ extraFlags = parseSectionFlags(FlagsStr, &UseLastGroup);
+ }
+
+ if (extraFlags == -1U)
+ return TokError("unknown flag");
+ Flags |= extraFlags;
+
+ bool Mergeable = Flags & ELF::SHF_MERGE;
+ bool Group = Flags & ELF::SHF_GROUP;
+ if (Group && UseLastGroup)
+ return TokError("Section cannot specifiy a group name while also acting "
+ "as a member of the last group");
+
+ if (getLexer().isNot(AsmToken::Comma)) {
+ if (Mergeable)
+ return TokError("Mergeable section must specify the type");
+ if (Group)
+ return TokError("Group section must specify the type");
+ } else {
+ Lex();
+ if (getLexer().is(AsmToken::At) || getLexer().is(AsmToken::Percent) ||
+ getLexer().is(AsmToken::String)) {
+ if (!getLexer().is(AsmToken::String))
+ Lex();
+ } else
+ return TokError("expected '@<type>', '%<type>' or \"<type>\"");
+
+ if (getParser().parseIdentifier(TypeName))
+ return TokError("expected identifier in directive");
+
+ if (Mergeable) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected the entry size");
+ Lex();
+ if (getParser().parseAbsoluteExpression(Size))
+ return true;
+ if (Size <= 0)
+ return TokError("entry size must be positive");
+ }
+
+ if (Group) {
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected group name");
+ Lex();
+ if (getParser().parseIdentifier(GroupName))
+ return true;
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ StringRef Linkage;
+ if (getParser().parseIdentifier(Linkage))
+ return true;
+ if (Linkage != "comdat")
+ return TokError("Linkage must be 'comdat'");
+ }
+ }
+ if (getLexer().is(AsmToken::Comma)) {
+ Lex();
+ if (getParser().parseIdentifier(UniqueStr))
+ return TokError("expected identifier in directive");
+ if (UniqueStr != "unique")
+ return TokError("expected 'unique'");
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected commma");
+ Lex();
+ if (getParser().parseAbsoluteExpression(UniqueID))
+ return true;
+ if (UniqueID < 0)
+ return TokError("unique id must be positive");
+ if (!isUInt<32>(UniqueID) || UniqueID == ~0U)
+ return TokError("unique id is too large");
+ }
+ }
+ }
+
+EndStmt:
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ unsigned Type = ELF::SHT_PROGBITS;
+
+ if (TypeName.empty()) {
+ if (SectionName.startswith(".note"))
+ Type = ELF::SHT_NOTE;
+ else if (SectionName == ".init_array")
+ Type = ELF::SHT_INIT_ARRAY;
+ else if (SectionName == ".fini_array")
+ Type = ELF::SHT_FINI_ARRAY;
+ else if (SectionName == ".preinit_array")
+ Type = ELF::SHT_PREINIT_ARRAY;
+ } else {
+ if (TypeName == "init_array")
+ Type = ELF::SHT_INIT_ARRAY;
+ else if (TypeName == "fini_array")
+ Type = ELF::SHT_FINI_ARRAY;
+ else if (TypeName == "preinit_array")
+ Type = ELF::SHT_PREINIT_ARRAY;
+ else if (TypeName == "nobits")
+ Type = ELF::SHT_NOBITS;
+ else if (TypeName == "progbits")
+ Type = ELF::SHT_PROGBITS;
+ else if (TypeName == "note")
+ Type = ELF::SHT_NOTE;
+ else if (TypeName == "unwind")
+ Type = ELF::SHT_X86_64_UNWIND;
+ else
+ return TokError("unknown section type");
+ }
+
+ if (UseLastGroup) {
+ MCSectionSubPair CurrentSection = getStreamer().getCurrentSection();
+ if (const MCSectionELF *Section =
+ cast_or_null<MCSectionELF>(CurrentSection.first))
+ if (const MCSymbol *Group = Section->getGroup()) {
+ GroupName = Group->getName();
+ Flags |= ELF::SHF_GROUP;
+ }
+ }
+
+ MCSection *ELFSection = getContext().getELFSection(SectionName, Type, Flags,
+ Size, GroupName, UniqueID);
+ getStreamer().SwitchSection(ELFSection, Subsection);
+
+ if (getContext().getGenDwarfForAssembly()) {
+ bool InsertResult = getContext().addGenDwarfSection(ELFSection);
+ if (InsertResult) {
+ if (getContext().getDwarfVersion() <= 2)
+ Warning(loc, "DWARF2 only supports one section per compilation unit");
+
+ if (!ELFSection->getBeginSymbol()) {
+ MCSymbol *SectionStartSymbol = getContext().createTempSymbol();
+ getStreamer().EmitLabel(SectionStartSymbol);
+ ELFSection->setBeginSymbol(SectionStartSymbol);
+ }
+ }
+ }
+
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectivePrevious(StringRef DirName, SMLoc) {
+ MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
+ if (PreviousSection.first == nullptr)
+ return TokError(".previous without corresponding .section");
+ getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
+
+ return false;
+}
+
+static MCSymbolAttr MCAttrForString(StringRef Type) {
+ return StringSwitch<MCSymbolAttr>(Type)
+ .Cases("STT_FUNC", "function", MCSA_ELF_TypeFunction)
+ .Cases("STT_OBJECT", "object", MCSA_ELF_TypeObject)
+ .Cases("STT_TLS", "tls_object", MCSA_ELF_TypeTLS)
+ .Cases("STT_COMMON", "common", MCSA_ELF_TypeCommon)
+ .Cases("STT_NOTYPE", "notype", MCSA_ELF_TypeNoType)
+ .Cases("STT_GNU_IFUNC", "gnu_indirect_function",
+ MCSA_ELF_TypeIndFunction)
+ .Case("gnu_unique_object", MCSA_ELF_TypeGnuUniqueObject)
+ .Default(MCSA_Invalid);
+}
+
+/// ParseDirectiveELFType
+/// ::= .type identifier , STT_<TYPE_IN_UPPER_CASE>
+/// ::= .type identifier , #attribute
+/// ::= .type identifier , @attribute
+/// ::= .type identifier , %attribute
+/// ::= .type identifier , "attribute"
+bool ELFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ // Handle the identifier as the key symbol.
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ // NOTE the comma is optional in all cases. It is only documented as being
+ // optional in the first case, however, GAS will silently treat the comma as
+ // optional in all cases. Furthermore, although the documentation states that
+ // the first form only accepts STT_<TYPE_IN_UPPER_CASE>, in reality, GAS
+ // accepts both the upper case name as well as the lower case aliases.
+ if (getLexer().is(AsmToken::Comma))
+ Lex();
+
+ if (getLexer().isNot(AsmToken::Identifier) &&
+ getLexer().isNot(AsmToken::Hash) &&
+ getLexer().isNot(AsmToken::Percent) &&
+ getLexer().isNot(AsmToken::String)) {
+ if (!getLexer().getAllowAtInIdentifier())
+ return TokError("expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', "
+ "'%<type>' or \"<type>\"");
+ else if (getLexer().isNot(AsmToken::At))
+ return TokError("expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', '@<type>', "
+ "'%<type>' or \"<type>\"");
+ }
+
+ if (getLexer().isNot(AsmToken::String) &&
+ getLexer().isNot(AsmToken::Identifier))
+ Lex();
+
+ SMLoc TypeLoc = getLexer().getLoc();
+
+ StringRef Type;
+ if (getParser().parseIdentifier(Type))
+ return TokError("expected symbol type in directive");
+
+ MCSymbolAttr Attr = MCAttrForString(Type);
+ if (Attr == MCSA_Invalid)
+ return Error(TypeLoc, "unsupported attribute in '.type' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.type' directive");
+ Lex();
+
+ getStreamer().EmitSymbolAttribute(Sym, Attr);
+
+ return false;
+}
+
+/// ParseDirectiveIdent
+/// ::= .ident string
+bool ELFAsmParser::ParseDirectiveIdent(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.ident' directive");
+
+ StringRef Data = getTok().getIdentifier();
+
+ Lex();
+
+ getStreamer().EmitIdent(Data);
+ return false;
+}
+
+/// ParseDirectiveSymver
+/// ::= .symver foo, bar2@zed
+bool ELFAsmParser::ParseDirectiveSymver(StringRef, SMLoc) {
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected a comma");
+
+ // ARM assembly uses @ for a comment...
+ // except when parsing the second parameter of the .symver directive.
+ // Force the next symbol to allow @ in the identifier, which is
+ // required for this directive and then reset it to its initial state.
+ const bool AllowAtInIdentifier = getLexer().getAllowAtInIdentifier();
+ getLexer().setAllowAtInIdentifier(true);
+ Lex();
+ getLexer().setAllowAtInIdentifier(AllowAtInIdentifier);
+
+ StringRef AliasName;
+ if (getParser().parseIdentifier(AliasName))
+ return TokError("expected identifier in directive");
+
+ if (AliasName.find('@') == StringRef::npos)
+ return TokError("expected a '@' in the name");
+
+ MCSymbol *Alias = getContext().getOrCreateSymbol(AliasName);
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+ const MCExpr *Value = MCSymbolRefExpr::create(Sym, getContext());
+
+ getStreamer().EmitAssignment(Alias, Value);
+ return false;
+}
+
+/// ParseDirectiveVersion
+/// ::= .version string
+bool ELFAsmParser::ParseDirectiveVersion(StringRef, SMLoc) {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("unexpected token in '.version' directive");
+
+ StringRef Data = getTok().getIdentifier();
+
+ Lex();
+
+ MCSection *Note = getContext().getELFSection(".note", ELF::SHT_NOTE, 0);
+
+ getStreamer().PushSection();
+ getStreamer().SwitchSection(Note);
+ getStreamer().EmitIntValue(Data.size()+1, 4); // namesz.
+ getStreamer().EmitIntValue(0, 4); // descsz = 0 (no description).
+ getStreamer().EmitIntValue(1, 4); // type = NT_VERSION.
+ getStreamer().EmitBytes(Data); // name.
+ getStreamer().EmitIntValue(0, 1); // terminate the string.
+ getStreamer().EmitValueToAlignment(4); // ensure 4 byte alignment.
+ getStreamer().PopSection();
+ return false;
+}
+
+/// ParseDirectiveWeakref
+/// ::= .weakref foo, bar
+bool ELFAsmParser::ParseDirectiveWeakref(StringRef, SMLoc) {
+ // FIXME: Share code with the other alias building directives.
+
+ StringRef AliasName;
+ if (getParser().parseIdentifier(AliasName))
+ return TokError("expected identifier in directive");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("expected a comma");
+
+ Lex();
+
+ StringRef Name;
+ if (getParser().parseIdentifier(Name))
+ return TokError("expected identifier in directive");
+
+ MCSymbol *Alias = getContext().getOrCreateSymbol(AliasName);
+
+ MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+
+ getStreamer().EmitWeakReference(Alias, Sym);
+ return false;
+}
+
+bool ELFAsmParser::ParseDirectiveSubsection(StringRef, SMLoc) {
+ const MCExpr *Subsection = nullptr;
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ if (getParser().parseExpression(Subsection))
+ return true;
+ }
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in directive");
+
+ getStreamer().SubSection(Subsection);
+ return false;
+}
+
+namespace llvm {
+
+MCAsmParserExtension *createELFAsmParser() {
+ return new ELFAsmParser;
+}
+
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp
new file mode 100644
index 0000000..e891bd2
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmLexer.cpp
@@ -0,0 +1,36 @@
+//===-- MCAsmLexer.cpp - Abstract Asm Lexer Interface ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/Support/SourceMgr.h"
+
+using namespace llvm;
+
+MCAsmLexer::MCAsmLexer() : TokStart(nullptr), SkipSpace(true) {
+ CurTok.emplace_back(AsmToken::Error, StringRef());
+}
+
+MCAsmLexer::~MCAsmLexer() {
+}
+
+SMLoc MCAsmLexer::getLoc() const {
+ return SMLoc::getFromPointer(TokStart);
+}
+
+SMLoc AsmToken::getLoc() const {
+ return SMLoc::getFromPointer(Str.data());
+}
+
+SMLoc AsmToken::getEndLoc() const {
+ return SMLoc::getFromPointer(Str.data() + Str.size());
+}
+
+SMRange AsmToken::getLocRange() const {
+ return SMRange(getLoc(), getEndLoc());
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp
new file mode 100644
index 0000000..290dcb2
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmParser.cpp
@@ -0,0 +1,50 @@
+//===-- MCAsmParser.cpp - Abstract Asm Parser Interface -------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+MCAsmParser::MCAsmParser() : TargetParser(nullptr), ShowParsedOperands(0) {
+}
+
+MCAsmParser::~MCAsmParser() {
+}
+
+void MCAsmParser::setTargetParser(MCTargetAsmParser &P) {
+ assert(!TargetParser && "Target parser is already initialized!");
+ TargetParser = &P;
+ TargetParser->Initialize(*this);
+}
+
+const AsmToken &MCAsmParser::getTok() const {
+ return getLexer().getTok();
+}
+
+bool MCAsmParser::TokError(const Twine &Msg, ArrayRef<SMRange> Ranges) {
+ Error(getLexer().getLoc(), Msg, Ranges);
+ return true;
+}
+
+bool MCAsmParser::parseExpression(const MCExpr *&Res) {
+ SMLoc L;
+ return parseExpression(Res, L);
+}
+
+void MCParsedAsmOperand::dump() const {
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+ dbgs() << " " << *this;
+#endif
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp b/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp
new file mode 100644
index 0000000..3f25a14
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCAsmParserExtension.cpp
@@ -0,0 +1,22 @@
+//===-- MCAsmParserExtension.cpp - Asm Parser Hooks -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCParser/MCAsmParserExtension.h"
+using namespace llvm;
+
+MCAsmParserExtension::MCAsmParserExtension() :
+ BracketExpressionsSupported(false) {
+}
+
+MCAsmParserExtension::~MCAsmParserExtension() {
+}
+
+void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
+ this->Parser = &Parser;
+}
diff --git a/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp b/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp
new file mode 100644
index 0000000..4e4b478
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCParser/MCTargetAsmParser.cpp
@@ -0,0 +1,32 @@
+//===-- MCTargetAsmParser.cpp - Target Assembly Parser ---------------------==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+using namespace llvm;
+
+MCTargetAsmParser::MCTargetAsmParser(MCTargetOptions const &MCOptions,
+ const MCSubtargetInfo &STI)
+ : AvailableFeatures(0), ParsingInlineAsm(false), MCOptions(MCOptions),
+ STI(&STI)
+{
+}
+
+MCTargetAsmParser::~MCTargetAsmParser() {
+}
+
+MCSubtargetInfo &MCTargetAsmParser::copySTI() {
+ MCSubtargetInfo &STICopy = getContext().getSubtargetCopy(getSTI());
+ STI = &STICopy;
+ return STICopy;
+}
+
+const MCSubtargetInfo &MCTargetAsmParser::getSTI() const {
+ return *STI;
+}
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