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add a new EmitCFAByte method and use it.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94251 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-01-22 23:40:08 +00:00
parent 894d75aa01
commit 245834dde5
2 changed files with 23 additions and 14 deletions
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33
lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
View File

@@ -85,6 +85,18 @@ void DwarfPrinter::EmitEncodingByte(unsigned Val, const char *Desc) {
Asm->OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/); 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. /// EmitSLEB128 - emit the specified signed leb128 value.
void DwarfPrinter::EmitSLEB128(int Value, const char *Desc) const { void DwarfPrinter::EmitSLEB128(int Value, const char *Desc) const {
if (Asm->VerboseAsm && Desc) if (Asm->VerboseAsm && Desc)
@@ -263,8 +275,7 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
// Advance row if new location. // Advance row if new location.
if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) { if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
Asm->EmitInt8(dwarf::DW_CFA_advance_loc4); EmitCFAByte(dwarf::DW_CFA_advance_loc4);
Asm->EOL("DW_CFA_advance_loc4");
EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true); EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
Asm->O << '\n'; Asm->O << '\n';
@@ -277,11 +288,9 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
if (!Src.isReg()) { if (!Src.isReg()) {
if (Src.getReg() == MachineLocation::VirtualFP) { if (Src.getReg() == MachineLocation::VirtualFP) {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_offset); EmitCFAByte(dwarf::DW_CFA_def_cfa_offset);
Asm->EOL("DW_CFA_def_cfa_offset");
} else { } else {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa); EmitCFAByte(dwarf::DW_CFA_def_cfa);
Asm->EOL("DW_CFA_def_cfa");
EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register"); EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register");
} }
@@ -293,8 +302,7 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
} else if (Src.isReg() && } else if (Src.isReg() &&
Src.getReg() == MachineLocation::VirtualFP) { Src.getReg() == MachineLocation::VirtualFP) {
if (Dst.isReg()) { if (Dst.isReg()) {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_register); EmitCFAByte(dwarf::DW_CFA_def_cfa_register);
Asm->EOL("DW_CFA_def_cfa_register");
EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register"); EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register");
} else { } else {
llvm_unreachable("Machine move not supported yet."); llvm_unreachable("Machine move not supported yet.");
@@ -304,17 +312,14 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
int Offset = Dst.getOffset() / stackGrowth; int Offset = Dst.getOffset() / stackGrowth;
if (Offset < 0) { if (Offset < 0) {
Asm->EmitInt8(dwarf::DW_CFA_offset_extended_sf); EmitCFAByte(dwarf::DW_CFA_offset_extended_sf);
Asm->EOL("DW_CFA_offset_extended_sf");
EmitULEB128(Reg, "Reg"); EmitULEB128(Reg, "Reg");
EmitSLEB128(Offset, "Offset"); EmitSLEB128(Offset, "Offset");
} else if (Reg < 64) { } else if (Reg < 64) {
Asm->EmitInt8(dwarf::DW_CFA_offset + Reg); EmitCFAByte(dwarf::DW_CFA_offset + Reg);
Asm->EOL("DW_CFA_offset + Reg (" + Twine(Reg) + ")");
EmitULEB128(Offset, "Offset"); EmitULEB128(Offset, "Offset");
} else { } else {
Asm->EmitInt8(dwarf::DW_CFA_offset_extended); EmitCFAByte(dwarf::DW_CFA_offset_extended);
Asm->EOL("DW_CFA_offset_extended");
EmitULEB128(Reg, "Reg"); EmitULEB128(Reg, "Reg");
EmitULEB128(Offset, "Offset"); EmitULEB128(Offset, "Offset");
} }

4
lib/CodeGen/AsmPrinter/DwarfPrinter.h
View File

@@ -91,6 +91,10 @@ public:
/// specifying (e.g. "LSDA"). /// specifying (e.g. "LSDA").
void EmitEncodingByte(unsigned Val, const char *Desc); void EmitEncodingByte(unsigned Val, const char *Desc);
/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
void EmitCFAByte(unsigned Val);
/// EmitSLEB128 - emit the specified signed leb128 value. /// EmitSLEB128 - emit the specified signed leb128 value.
void EmitSLEB128(int Value, const char *Desc) const; void EmitSLEB128(int Value, const char *Desc) const;