Dead code elimination.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130984 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 31bf418..a68a13e 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -596,7 +596,7 @@
if (UnwindTablesMandatory)
return true;
- if (MMI->hasDebugInfo() && !MAI->doesDwarfRequireFrameSection())
+ if (MMI->hasDebugInfo())
return true;
if (MF->getFunction()->doesNotThrow())
@@ -608,8 +608,7 @@
void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
MCSymbol *Label = MI.getOperand(0).getMCSymbol();
- if (MAI->doesDwarfRequireFrameSection() ||
- MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
+ if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
OutStreamer.EmitLabel(Label);
if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 194f1f1..bc72c4a 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -256,7 +256,7 @@
CurrentFnDbgScope(0), PrevLabel(NULL) {
NextStringPoolNumber = 0;
- DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
+ DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
DwarfStrSectionSym = TextSectionSym = 0;
DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0;
FunctionBeginSym = FunctionEndSym = 0;
@@ -1261,14 +1261,6 @@
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_end", i));
}
- // Emit common frame information.
- emitCommonDebugFrame();
-
- // Emit function debug frame information
- for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
- E = DebugFrames.end(); I != E; ++I)
- emitFunctionDebugFrame(*I);
-
// Compute DIE offsets and sizes.
computeSizeAndOffsets();
@@ -2261,11 +2253,6 @@
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
// Dwarf sections base addresses.
- if (Asm->MAI->doesDwarfRequireFrameSection()) {
- DwarfFrameSectionSym =
- EmitSectionSym(Asm, TLOF.getDwarfFrameSection(), "section_debug_frame");
- }
-
DwarfInfoSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
DwarfAbbrevSectionSym =
@@ -2473,91 +2460,6 @@
Asm->EmitInt8(1);
}
-/// emitCommonDebugFrame - Emit common frame info into a debug frame section.
-///
-void DwarfDebug::emitCommonDebugFrame() {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
-
- int stackGrowth = Asm->getTargetData().getPointerSize();
- if (Asm->TM.getFrameLowering()->getStackGrowthDirection() ==
- TargetFrameLowering::StackGrowsDown)
- stackGrowth *= -1;
-
- // Start the dwarf frame section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common"));
- Asm->OutStreamer.AddComment("Length of Common Information Entry");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("debug_frame_common_end"),
- Asm->GetTempSymbol("debug_frame_common_begin"), 4);
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_begin"));
- Asm->OutStreamer.AddComment("CIE Identifier Tag");
- Asm->EmitInt32((int)dwarf::DW_CIE_ID);
- Asm->OutStreamer.AddComment("CIE Version");
- Asm->EmitInt8(dwarf::DW_CIE_VERSION);
- Asm->OutStreamer.AddComment("CIE Augmentation");
- Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator.
- Asm->EmitULEB128(1, "CIE Code Alignment Factor");
- Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
- Asm->OutStreamer.AddComment("CIE RA Column");
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
-
- std::vector<MachineMove> Moves;
- TFI->getInitialFrameState(Moves);
-
- Asm->EmitFrameMoves(Moves, 0, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_end"));
-}
-
-/// emitFunctionDebugFrame - Emit per function frame info into a debug frame
-/// section.
-void DwarfDebug::
-emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
-
- // Start the dwarf frame section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.AddComment("Length of Frame Information Entry");
- MCSymbol *DebugFrameBegin =
- Asm->GetTempSymbol("debug_frame_begin", DebugFrameInfo.Number);
- MCSymbol *DebugFrameEnd =
- Asm->GetTempSymbol("debug_frame_end", DebugFrameInfo.Number);
- Asm->EmitLabelDifference(DebugFrameEnd, DebugFrameBegin, 4);
-
- Asm->OutStreamer.EmitLabel(DebugFrameBegin);
-
- Asm->OutStreamer.AddComment("FDE CIE offset");
- Asm->EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"),
- DwarfFrameSectionSym);
-
- Asm->OutStreamer.AddComment("FDE initial location");
- MCSymbol *FuncBeginSym =
- Asm->GetTempSymbol("func_begin", DebugFrameInfo.Number);
- Asm->OutStreamer.EmitSymbolValue(FuncBeginSym,
- Asm->getTargetData().getPointerSize(),
- 0/*AddrSpace*/);
-
-
- Asm->OutStreamer.AddComment("FDE address range");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("func_end",DebugFrameInfo.Number),
- FuncBeginSym, Asm->getTargetData().getPointerSize());
-
- Asm->EmitFrameMoves(DebugFrameInfo.Moves, FuncBeginSym, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(DebugFrameEnd);
-}
-
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
///
void DwarfDebug::emitDebugPubNames() {
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 25f2675..4dc9de4 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -269,7 +269,7 @@
// Section Symbols: these are assembler temporary labels that are emitted at
// the beginning of each supported dwarf section. These are used to form
// section offsets and are created by EmitSectionLabels.
- MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
+ MCSymbol *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym;
MCSymbol *DwarfDebugLocSectionSym;
MCSymbol *FunctionBeginSym, *FunctionEndSym;
@@ -338,14 +338,6 @@
///
void emitEndOfLineMatrix(unsigned SectionEnd);
- /// emitCommonDebugFrame - Emit common frame info into a debug frame section.
- ///
- void emitCommonDebugFrame();
-
- /// emitFunctionDebugFrame - Emit per function frame info into a debug frame
- /// section.
- void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo);
-
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
///
void emitDebugPubNames();