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-rw-r--r--lib/CodeGen/AsmPrinter/DwarfPrinter.cpp308
1 files changed, 0 insertions, 308 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp b/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
deleted file mode 100644
index 17eb2e8..0000000
--- a/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
+++ /dev/null
@@ -1,308 +0,0 @@
-//===--- lib/CodeGen/DwarfPrinter.cpp - Dwarf Printer ---------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Emit general DWARF directives.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DwarfPrinter.h"
-#include "llvm/Module.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetFrameInfo.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/ADT/SmallString.h"
-using namespace llvm;
-
-DwarfPrinter::DwarfPrinter(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T)
-: O(OS), Asm(A), MAI(T), TD(Asm->TM.getTargetData()),
- RI(Asm->TM.getRegisterInfo()), M(NULL), MF(NULL), MMI(NULL),
- SubprogramCount(0) {}
-
-
-/// getDWLabel - Return the MCSymbol corresponding to the assembler temporary
-/// label with the specified stem and unique ID.
-MCSymbol *DwarfPrinter::getDWLabel(const char *Name, unsigned ID) const {
- // FIXME: REMOVE this. However, there is stuff in EH that passes counters in
- // here that can be zero.
-
- //assert(ID && "Should use getTempLabel if no ID");
- if (ID == 0) return getTempLabel(Name);
- return Asm->OutContext.GetOrCreateSymbol
- (Twine(MAI->getPrivateGlobalPrefix()) + Twine(Name) + Twine(ID));
-}
-
-/// getTempLabel - Return the MCSymbol corresponding to the assembler temporary
-/// label with the specified name.
-MCSymbol *DwarfPrinter::getTempLabel(const char *Name) const {
- return Asm->OutContext.GetOrCreateSymbol
- (Twine(MAI->getPrivateGlobalPrefix()) + Name);
-}
-
-
-/// SizeOfEncodedValue - Return the size of the encoding in bytes.
-unsigned DwarfPrinter::SizeOfEncodedValue(unsigned Encoding) const {
- if (Encoding == dwarf::DW_EH_PE_omit)
- return 0;
-
- switch (Encoding & 0x07) {
- case dwarf::DW_EH_PE_absptr:
- return TD->getPointerSize();
- case dwarf::DW_EH_PE_udata2:
- return 2;
- case dwarf::DW_EH_PE_udata4:
- return 4;
- case dwarf::DW_EH_PE_udata8:
- return 8;
- }
-
- assert(0 && "Invalid encoded value.");
- return 0;
-}
-
-static const char *DecodeDWARFEncoding(unsigned Encoding) {
- switch (Encoding) {
- case dwarf::DW_EH_PE_absptr: return "absptr";
- case dwarf::DW_EH_PE_omit: return "omit";
- case dwarf::DW_EH_PE_pcrel: return "pcrel";
- case dwarf::DW_EH_PE_udata4: return "udata4";
- case dwarf::DW_EH_PE_udata8: return "udata8";
- case dwarf::DW_EH_PE_sdata4: return "sdata4";
- case dwarf::DW_EH_PE_sdata8: return "sdata8";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4: return "pcrel udata4";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4: return "pcrel sdata4";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8: return "pcrel udata8";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8: return "pcrel sdata8";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4:
- return "indirect pcrel udata4";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4:
- return "indirect pcrel sdata4";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8:
- return "indirect pcrel udata8";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8:
- return "indirect pcrel sdata8";
- }
-
- return "<unknown encoding>";
-}
-
-/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an
-/// encoding. If verbose assembly output is enabled, we output comments
-/// describing the encoding. Desc is an optional string saying what the
-/// encoding is specifying (e.g. "LSDA").
-void DwarfPrinter::EmitEncodingByte(unsigned Val, const char *Desc) {
- if (Asm->VerboseAsm) {
- if (Desc != 0)
- Asm->OutStreamer.AddComment(Twine(Desc)+" Encoding = " +
- Twine(DecodeDWARFEncoding(Val)));
- else
- Asm->OutStreamer.AddComment(Twine("Encoding = ") +
- DecodeDWARFEncoding(Val));
- }
-
- Asm->OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/);
-}
-
-/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
-void DwarfPrinter::EmitCFAByte(unsigned Val) {
- if (Asm->VerboseAsm) {
- if (Val >= dwarf::DW_CFA_offset && Val < dwarf::DW_CFA_offset+64)
- Asm->OutStreamer.AddComment("DW_CFA_offset + Reg (" +
- Twine(Val-dwarf::DW_CFA_offset) + ")");
- else
- Asm->OutStreamer.AddComment(dwarf::CallFrameString(Val));
- }
- Asm->OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/);
-}
-
-/// EmitSLEB128 - emit the specified signed leb128 value.
-void DwarfPrinter::EmitSLEB128(int Value, const char *Desc) const {
- if (Asm->VerboseAsm && Desc)
- Asm->OutStreamer.AddComment(Desc);
-
- if (MAI->hasLEB128()) {
- // FIXME: MCize.
- O << "\t.sleb128\t" << Value;
- Asm->OutStreamer.AddBlankLine();
- return;
- }
-
- // If we don't have .sleb128, emit as .bytes.
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
-
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- Asm->OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
- } while (IsMore);
-}
-
-/// EmitULEB128 - emit the specified signed leb128 value.
-void DwarfPrinter::EmitULEB128(unsigned Value, const char *Desc,
- unsigned PadTo) const {
- if (Asm->VerboseAsm && Desc)
- Asm->OutStreamer.AddComment(Desc);
-
- if (MAI->hasLEB128() && PadTo == 0) {
- // FIXME: MCize.
- O << "\t.uleb128\t" << Value;
- Asm->OutStreamer.AddBlankLine();
- return;
- }
-
- // If we don't have .uleb128 or we want to emit padding, emit as .bytes.
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- if (Value || PadTo != 0) Byte |= 0x80;
- Asm->OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
- } while (Value);
-
- if (PadTo) {
- if (PadTo > 1)
- Asm->OutStreamer.EmitFill(PadTo - 1, 0x80/*fillval*/, 0/*addrspace*/);
- Asm->OutStreamer.EmitFill(1, 0/*fillval*/, 0/*addrspace*/);
- }
-}
-
-
-void DwarfPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const {
- const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
-
- const MCExpr *Exp = TLOF.getExprForDwarfReference(Sym, Asm->Mang,
- Asm->MMI, Encoding,
- Asm->OutStreamer);
- Asm->OutStreamer.EmitValue(Exp, SizeOfEncodedValue(Encoding), /*addrspace*/0);
-}
-
-void DwarfPrinter::EmitReference(const GlobalValue *GV, unsigned Encoding)const{
- const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
-
- const MCExpr *Exp =
- TLOF.getExprForDwarfGlobalReference(GV, Asm->Mang, Asm->MMI, Encoding,
- Asm->OutStreamer);
- Asm->OutStreamer.EmitValue(Exp, SizeOfEncodedValue(Encoding), /*addrspace*/0);
-}
-
-/// EmitDifference - Emit the difference between two labels. If this assembler
-/// supports .set, we emit a .set of a temporary and then use it in the .word.
-void DwarfPrinter::EmitDifference(const MCSymbol *TagHi, const MCSymbol *TagLo,
- bool IsSmall) {
- unsigned Size = IsSmall ? 4 : TD->getPointerSize();
- Asm->EmitLabelDifference(TagHi, TagLo, Size);
-}
-
-void DwarfPrinter::EmitSectionOffset(const MCSymbol *Label,
- const MCSymbol *Section,
- bool IsSmall, bool isEH) {
- bool isAbsolute;
- if (isEH)
- isAbsolute = MAI->isAbsoluteEHSectionOffsets();
- else
- isAbsolute = MAI->isAbsoluteDebugSectionOffsets();
-
- if (!isAbsolute)
- return EmitDifference(Label, Section, IsSmall);
-
- // On COFF targets, we have to emit the weird .secrel32 directive.
- if (const char *SecOffDir = MAI->getDwarfSectionOffsetDirective()) {
- // FIXME: MCize.
- Asm->O << SecOffDir << Label->getName();
- Asm->OutStreamer.AddBlankLine();
- } else {
- unsigned Size = IsSmall ? 4 : TD->getPointerSize();
- Asm->OutStreamer.EmitSymbolValue(Label, Size, 0/*AddrSpace*/);
- }
-}
-
-/// EmitFrameMoves - Emit frame instructions to describe the layout of the
-/// frame.
-void DwarfPrinter::EmitFrameMoves(MCSymbol *BaseLabel,
- const std::vector<MachineMove> &Moves,
- bool isEH) {
- int stackGrowth = TD->getPointerSize();
- if (Asm->TM.getFrameInfo()->getStackGrowthDirection() !=
- TargetFrameInfo::StackGrowsUp)
- stackGrowth *= -1;
-
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- const MachineMove &Move = Moves[i];
- MCSymbol *Label = Move.getLabel();
- // Throw out move if the label is invalid.
- if (Label && !Label->isDefined()) continue; // Not emitted, in dead code.
-
- const MachineLocation &Dst = Move.getDestination();
- const MachineLocation &Src = Move.getSource();
-
- // Advance row if new location.
- if (BaseLabel && Label) {
- MCSymbol *ThisSym = Label;
- if (ThisSym != BaseLabel) {
- EmitCFAByte(dwarf::DW_CFA_advance_loc4);
- EmitDifference(ThisSym, BaseLabel, true);
- BaseLabel = ThisSym;
- }
- }
-
- // If advancing cfa.
- if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
- if (!Src.isReg()) {
- if (Src.getReg() == MachineLocation::VirtualFP) {
- EmitCFAByte(dwarf::DW_CFA_def_cfa_offset);
- } else {
- EmitCFAByte(dwarf::DW_CFA_def_cfa);
- EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register");
- }
-
- int Offset = -Src.getOffset();
- EmitULEB128(Offset, "Offset");
- } else {
- llvm_unreachable("Machine move not supported yet.");
- }
- } else if (Src.isReg() &&
- Src.getReg() == MachineLocation::VirtualFP) {
- if (Dst.isReg()) {
- EmitCFAByte(dwarf::DW_CFA_def_cfa_register);
- EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register");
- } else {
- llvm_unreachable("Machine move not supported yet.");
- }
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
- int Offset = Dst.getOffset() / stackGrowth;
-
- if (Offset < 0) {
- EmitCFAByte(dwarf::DW_CFA_offset_extended_sf);
- EmitULEB128(Reg, "Reg");
- EmitSLEB128(Offset, "Offset");
- } else if (Reg < 64) {
- EmitCFAByte(dwarf::DW_CFA_offset + Reg);
- EmitULEB128(Offset, "Offset");
- } else {
- EmitCFAByte(dwarf::DW_CFA_offset_extended);
- EmitULEB128(Reg, "Reg");
- EmitULEB128(Offset, "Offset");
- }
- }
- }
-}
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