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now that the magic is dispelled, move EmitSectionOffset to AsmPrinter.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100368 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-04-04 23:25:33 +00:00
parent 3d22513611
commit 6189ed10c1
4 changed files with 50 additions and 56 deletions
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39
lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
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@ -14,7 +14,9 @@
#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
@ -158,3 +160,40 @@ void AsmPrinter::EmitReference(const GlobalValue *GV, unsigned Encoding)const{
TLOF.getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, OutStreamer);
OutStreamer.EmitValue(Exp, GetSizeOfEncodedValue(Encoding), /*addrspace*/0);
}
/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of its
/// section. This can be done with a special directive if the target supports
/// it (e.g. cygwin) or by emitting it as an offset from a label at the start
/// of the section.
///
/// SectionLabel is a temporary label emitted at the start of the section that
/// Label lives in.
void AsmPrinter::EmitSectionOffset(const MCSymbol *Label,
const MCSymbol *SectionLabel) const {
// On COFF targets, we have to emit the special .secrel32 directive.
if (const char *SecOffDir = MAI->getDwarfSectionOffsetDirective()) {
// FIXME: MCize.
OutStreamer.EmitRawText(SecOffDir + Twine(Label->getName()));
return;
}
// Get the section that we're referring to, based on SectionLabel.
const MCSection &Section = SectionLabel->getSection();
// If Label has already been emitted, verify that it is in the same section as
// section label for sanity.
assert((!Label->isInSection() || &Label->getSection() == &Section) &&
"Section offset using wrong section base for label");
// If the section in question will end up with an address of 0 anyway, we can
// just emit an absolute reference to save a relocation.
if (Section.isBaseAddressKnownZero()) {
OutStreamer.EmitSymbolValue(Label, 4, 0/*AddrSpace*/);
return;
}
// Otherwise, emit it as a label difference from the start of the section.
EmitLabelDifference(Label, SectionLabel, 4);
}

21
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2567,7 +2567,8 @@ void DwarfDebug::emitDebugInfo() {
Asm->OutStreamer.AddComment("DWARF version number");
Asm->EmitInt16(dwarf::DWARF_VERSION);
Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
EmitSectionOffset(Asm->GetTempSymbol("abbrev_begin"), DwarfAbbrevSectionSym);
Asm->EmitSectionOffset(Asm->GetTempSymbol("abbrev_begin"),
DwarfAbbrevSectionSym);
Asm->OutStreamer.AddComment("Address Size (in bytes)");
Asm->EmitInt8(TD->getPointerSize());
@ -2878,8 +2879,8 @@ emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
Asm->OutStreamer.EmitLabel(DebugFrameBegin);
Asm->OutStreamer.AddComment("FDE CIE offset");
EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"),
DwarfFrameSectionSym);
Asm->EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"),
DwarfFrameSectionSym);
Asm->OutStreamer.AddComment("FDE initial location");
MCSymbol *FuncBeginSym =
@ -2917,8 +2918,8 @@ void DwarfDebug::emitDebugPubNames() {
Asm->EmitInt16(dwarf::DWARF_VERSION);
Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
EmitSectionOffset(Asm->GetTempSymbol("info_begin", ModuleCU->getID()),
DwarfInfoSectionSym);
Asm->EmitSectionOffset(Asm->GetTempSymbol("info_begin", ModuleCU->getID()),
DwarfInfoSectionSym);
Asm->OutStreamer.AddComment("Compilation Unit Length");
Asm->EmitLabelDifference(Asm->GetTempSymbol("info_end", ModuleCU->getID()),
@ -2961,8 +2962,8 @@ void DwarfDebug::emitDebugPubTypes() {
Asm->EmitInt16(dwarf::DWARF_VERSION);
Asm->OutStreamer.AddComment("Offset of Compilation ModuleCU Info");
EmitSectionOffset(Asm->GetTempSymbol("info_begin", ModuleCU->getID()),
DwarfInfoSectionSym);
Asm->EmitSectionOffset(Asm->GetTempSymbol("info_begin", ModuleCU->getID()),
DwarfInfoSectionSym);
Asm->OutStreamer.AddComment("Compilation ModuleCU Length");
Asm->EmitLabelDifference(Asm->GetTempSymbol("info_end", ModuleCU->getID()),
@ -3107,11 +3108,11 @@ void DwarfDebug::emitDebugInlineInfo() {
Asm->OutStreamer.EmitBytes(Name, 0);
Asm->OutStreamer.EmitIntValue(0, 1, 0); // nul terminator.
} else
EmitSectionOffset(getStringPoolEntry(getRealLinkageName(LName)),
DwarfStrSectionSym);
Asm->EmitSectionOffset(getStringPoolEntry(getRealLinkageName(LName)),
DwarfStrSectionSym);
Asm->OutStreamer.AddComment("Function name");
EmitSectionOffset(getStringPoolEntry(Name), DwarfStrSectionSym);
Asm->EmitSectionOffset(getStringPoolEntry(Name), DwarfStrSectionSym);
Asm->EmitULEB128(Labels.size(), "Inline count");
for (SmallVector<InlineInfoLabels, 4>::iterator LI = Labels.begin(),

36
lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
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@ -20,7 +20,6 @@
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetData.h"
@ -40,41 +39,6 @@ DwarfPrinter::DwarfPrinter(AsmPrinter *A)
}
/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of its
/// section. This can be done with a special directive if the target supports
/// it (e.g. cygwin) or by emitting it as an offset from a label at the start
/// of the section.
///
/// SectionLabel is a temporary label emitted at the start of the section that
/// Label lives in.
void DwarfPrinter::EmitSectionOffset(const MCSymbol *Label,
const MCSymbol *SectionLabel) const {
// On COFF targets, we have to emit the special .secrel32 directive.
if (const char *SecOffDir = MAI->getDwarfSectionOffsetDirective()) {
// FIXME: MCize.
Asm->OutStreamer.EmitRawText(SecOffDir + Twine(Label->getName()));
return;
}
// Get the section that we're referring to, based on SectionLabel.
const MCSection &Section = SectionLabel->getSection();
// If Label has already been emitted, verify that it is in the same section as
// section label for sanity.
assert((!Label->isInSection() || &Label->getSection() == &Section) &&
"Section offset using wrong section base for label");
// If the section in question will end up with an address of 0 anyway, we can
// just emit an absolute reference to save a relocation.
if (Section.isBaseAddressKnownZero()) {
Asm->OutStreamer.EmitSymbolValue(Label, 4, 0/*AddrSpace*/);
return;
}
// Otherwise, emit it as a label difference from the start of the section.
Asm->EmitLabelDifference(Label, SectionLabel, 4);
}
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
/// frame.
void DwarfPrinter::EmitFrameMoves(MCSymbol *BaseLabel,

10
lib/CodeGen/AsmPrinter/DwarfPrinter.h
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@ -74,16 +74,6 @@ public:
const MCAsmInfo *getMCAsmInfo() const { return MAI; }
const TargetData *getTargetData() const { return TD; }
/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of its
/// section. This can be done with a special directive if the target supports
/// it (e.g. cygwin) or by emitting it as an offset from a label at the start
/// of the section.
///
/// SectionLabel is a temporary label emitted at the start of the section that
/// Label lives in.
void EmitSectionOffset(const MCSymbol *Label,
const MCSymbol *SectionLabel) const;
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
/// frame.
void EmitFrameMoves(MCSymbol *BaseLabel,