1 files changed, 339 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Parse/ParsePragma.cpp b/contrib/llvm/tools/clang/lib/Parse/ParsePragma.cpp
new file mode 100644
index 0000000..ddba09a
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Parse/ParsePragma.cpp
@@ -0,0 +1,339 @@
+//===--- ParsePragma.cpp - Language specific pragma parsing ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the language specific #pragma handlers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ParsePragma.h"
+#include "clang/Parse/ParseDiagnostic.h"
+#include "clang/Parse/Parser.h"
+#include "clang/Lex/Preprocessor.h"
+using namespace clang;
+
+
+// #pragma GCC visibility comes in two variants:
+//   'push' '(' [visibility] ')'
+//   'pop'
+void PragmaGCCVisibilityHandler::HandlePragma(Preprocessor &PP, Token &VisTok) {
+  SourceLocation VisLoc = VisTok.getLocation();
+
+  Token Tok;
+  PP.Lex(Tok);
+
+  const IdentifierInfo *PushPop = Tok.getIdentifierInfo();
+
+  bool IsPush;
+  const IdentifierInfo *VisType;
+  if (PushPop && PushPop->isStr("pop")) {
+    IsPush = false;
+    VisType = 0;
+  } else if (PushPop && PushPop->isStr("push")) {
+    IsPush = true;
+    PP.Lex(Tok);
+    if (Tok.isNot(tok::l_paren)) {
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen)
+        << "visibility";
+      return;
+    }
+    PP.Lex(Tok);
+    VisType = Tok.getIdentifierInfo();
+    if (!VisType) {
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
+        << "visibility";
+      return;
+    }
+    PP.Lex(Tok);
+    if (Tok.isNot(tok::r_paren)) {
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen)
+        << "visibility";
+      return;
+    }
+  } else {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
+      << "visibility";
+    return;
+  }
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::eom)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
+      << "visibility";
+    return;
+  }
+
+  Actions.ActOnPragmaVisibility(IsPush, VisType, VisLoc);
+}
+
+// #pragma pack(...) comes in the following delicious flavors:
+//   pack '(' [integer] ')'
+//   pack '(' 'show' ')'
+//   pack '(' ('push' | 'pop') [',' identifier] [, integer] ')'
+void PragmaPackHandler::HandlePragma(Preprocessor &PP, Token &PackTok) {
+  SourceLocation PackLoc = PackTok.getLocation();
+
+  Token Tok;
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::l_paren)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "pack";
+    return;
+  }
+
+  Sema::PragmaPackKind Kind = Sema::PPK_Default;
+  IdentifierInfo *Name = 0;
+  ExprResult Alignment;
+  SourceLocation LParenLoc = Tok.getLocation();
+  PP.Lex(Tok);
+  if (Tok.is(tok::numeric_constant)) {
+    Alignment = Actions.ActOnNumericConstant(Tok);
+    if (Alignment.isInvalid())
+      return;
+
+    PP.Lex(Tok);
+  } else if (Tok.is(tok::identifier)) {
+    const IdentifierInfo *II = Tok.getIdentifierInfo();
+    if (II->isStr("show")) {
+      Kind = Sema::PPK_Show;
+      PP.Lex(Tok);
+    } else {
+      if (II->isStr("push")) {
+        Kind = Sema::PPK_Push;
+      } else if (II->isStr("pop")) {
+        Kind = Sema::PPK_Pop;
+      } else {
+        PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_invalid_action);
+        return;
+      }
+      PP.Lex(Tok);
+
+      if (Tok.is(tok::comma)) {
+        PP.Lex(Tok);
+
+        if (Tok.is(tok::numeric_constant)) {
+          Alignment = Actions.ActOnNumericConstant(Tok);
+          if (Alignment.isInvalid())
+            return;
+
+          PP.Lex(Tok);
+        } else if (Tok.is(tok::identifier)) {
+          Name = Tok.getIdentifierInfo();
+          PP.Lex(Tok);
+
+          if (Tok.is(tok::comma)) {
+            PP.Lex(Tok);
+
+            if (Tok.isNot(tok::numeric_constant)) {
+              PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
+              return;
+            }
+
+            Alignment = Actions.ActOnNumericConstant(Tok);
+            if (Alignment.isInvalid())
+              return;
+
+            PP.Lex(Tok);
+          }
+        } else {
+          PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
+          return;
+        }
+      }
+    }
+  }
+
+  if (Tok.isNot(tok::r_paren)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen) << "pack";
+    return;
+  }
+
+  SourceLocation RParenLoc = Tok.getLocation();
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::eom)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "pack";
+    return;
+  }
+
+  Actions.ActOnPragmaPack(Kind, Name, Alignment.release(), PackLoc,
+                          LParenLoc, RParenLoc);
+}
+
+// #pragma 'align' '=' {'native','natural','mac68k','power','reset'}
+// #pragma 'options 'align' '=' {'native','natural','mac68k','power','reset'}
+static void ParseAlignPragma(Sema &Actions, Preprocessor &PP, Token &FirstTok,
+                             bool IsOptions) {
+  Token Tok;
+
+  if (IsOptions) {
+    PP.Lex(Tok);
+    if (Tok.isNot(tok::identifier) ||
+        !Tok.getIdentifierInfo()->isStr("align")) {
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_options_expected_align);
+      return;
+    }
+  }
+
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::equal)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_align_expected_equal)
+      << IsOptions;
+    return;
+  }
+
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::identifier)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
+      << (IsOptions ? "options" : "align");
+    return;
+  }
+
+  Sema::PragmaOptionsAlignKind Kind = Sema::POAK_Natural;
+  const IdentifierInfo *II = Tok.getIdentifierInfo();
+  if (II->isStr("native"))
+    Kind = Sema::POAK_Native;
+  else if (II->isStr("natural"))
+    Kind = Sema::POAK_Natural;
+  else if (II->isStr("packed"))
+    Kind = Sema::POAK_Packed;
+  else if (II->isStr("power"))
+    Kind = Sema::POAK_Power;
+  else if (II->isStr("mac68k"))
+    Kind = Sema::POAK_Mac68k;
+  else if (II->isStr("reset"))
+    Kind = Sema::POAK_Reset;
+  else {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_align_invalid_option)
+      << IsOptions;
+    return;
+  }
+
+  SourceLocation KindLoc = Tok.getLocation();
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::eom)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
+      << (IsOptions ? "options" : "align");
+    return;
+  }
+
+  Actions.ActOnPragmaOptionsAlign(Kind, FirstTok.getLocation(), KindLoc);
+}
+
+void PragmaAlignHandler::HandlePragma(Preprocessor &PP, Token &AlignTok) {
+  ParseAlignPragma(Actions, PP, AlignTok, /*IsOptions=*/false);
+}
+
+void PragmaOptionsHandler::HandlePragma(Preprocessor &PP, Token &OptionsTok) {
+  ParseAlignPragma(Actions, PP, OptionsTok, /*IsOptions=*/true);
+}
+
+// #pragma unused(identifier)
+void PragmaUnusedHandler::HandlePragma(Preprocessor &PP, Token &UnusedTok) {
+  // FIXME: Should we be expanding macros here? My guess is no.
+  SourceLocation UnusedLoc = UnusedTok.getLocation();
+
+  // Lex the left '('.
+  Token Tok;
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::l_paren)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "unused";
+    return;
+  }
+  SourceLocation LParenLoc = Tok.getLocation();
+
+  // Lex the declaration reference(s).
+  llvm::SmallVector<Token, 5> Identifiers;
+  SourceLocation RParenLoc;
+  bool LexID = true;
+
+  while (true) {
+    PP.Lex(Tok);
+
+    if (LexID) {
+      if (Tok.is(tok::identifier)) {
+        Identifiers.push_back(Tok);
+        LexID = false;
+        continue;
+      }
+
+      // Illegal token!
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_var);
+      return;
+    }
+
+    // We are execting a ')' or a ','.
+    if (Tok.is(tok::comma)) {
+      LexID = true;
+      continue;
+    }
+
+    if (Tok.is(tok::r_paren)) {
+      RParenLoc = Tok.getLocation();
+      break;
+    }
+
+    // Illegal token!
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_punc);
+    return;
+  }
+
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::eom)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
+        "unused";
+    return;
+  }
+
+  // Verify that we have a location for the right parenthesis.
+  assert(RParenLoc.isValid() && "Valid '#pragma unused' must have ')'");
+  assert(!Identifiers.empty() && "Valid '#pragma unused' must have arguments");
+
+  // Perform the action to handle the pragma.
+  Actions.ActOnPragmaUnused(Identifiers.data(), Identifiers.size(),
+                            parser.getCurScope(), UnusedLoc, LParenLoc, RParenLoc);
+}
+
+// #pragma weak identifier
+// #pragma weak identifier '=' identifier
+void PragmaWeakHandler::HandlePragma(Preprocessor &PP, Token &WeakTok) {
+  // FIXME: Should we be expanding macros here? My guess is no.
+  SourceLocation WeakLoc = WeakTok.getLocation();
+
+  Token Tok;
+  PP.Lex(Tok);
+  if (Tok.isNot(tok::identifier)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier) << "weak";
+    return;
+  }
+
+  IdentifierInfo *WeakName = Tok.getIdentifierInfo(), *AliasName = 0;
+  SourceLocation WeakNameLoc = Tok.getLocation(), AliasNameLoc;
+
+  PP.Lex(Tok);
+  if (Tok.is(tok::equal)) {
+    PP.Lex(Tok);
+    if (Tok.isNot(tok::identifier)) {
+      PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
+          << "weak";
+      return;
+    }
+    AliasName = Tok.getIdentifierInfo();
+    AliasNameLoc = Tok.getLocation();
+    PP.Lex(Tok);
+  }
+
+  if (Tok.isNot(tok::eom)) {
+    PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "weak";
+    return;
+  }
+
+  if (AliasName) {
+    Actions.ActOnPragmaWeakAlias(WeakName, AliasName, WeakLoc, WeakNameLoc,
+                                 AliasNameLoc);
+  } else {
+    Actions.ActOnPragmaWeakID(WeakName, WeakLoc, WeakNameLoc);
+  }
+}