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add a new EmitCFAByte method and use it. 

llvm-svn: 94251
This commit is contained in:
Chris Lattner 2010-01-22 23:40:08 +00:00
parent fa82355f33
commit 7859b1c226
2 changed files with 23 additions and 14 deletions
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33
llvm/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*/);
}
/// 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)
@ -263,8 +275,7 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
// Advance row if new location.
if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
Asm->EmitInt8(dwarf::DW_CFA_advance_loc4);
Asm->EOL("DW_CFA_advance_loc4");
EmitCFAByte(dwarf::DW_CFA_advance_loc4);
EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
Asm->O << '\n';
@ -277,11 +288,9 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
if (!Src.isReg()) {
if (Src.getReg() == MachineLocation::VirtualFP) {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_offset);
Asm->EOL("DW_CFA_def_cfa_offset");
EmitCFAByte(dwarf::DW_CFA_def_cfa_offset);
} else {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa);
Asm->EOL("DW_CFA_def_cfa");
EmitCFAByte(dwarf::DW_CFA_def_cfa);
EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register");
}
@ -293,8 +302,7 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
} else if (Src.isReg() &&
Src.getReg() == MachineLocation::VirtualFP) {
if (Dst.isReg()) {
Asm->EmitInt8(dwarf::DW_CFA_def_cfa_register);
Asm->EOL("DW_CFA_def_cfa_register");
EmitCFAByte(dwarf::DW_CFA_def_cfa_register);
EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register");
} else {
llvm_unreachable("Machine move not supported yet.");
@ -304,17 +312,14 @@ void DwarfPrinter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
int Offset = Dst.getOffset() / stackGrowth;
if (Offset < 0) {
Asm->EmitInt8(dwarf::DW_CFA_offset_extended_sf);
Asm->EOL("DW_CFA_offset_extended_sf");
EmitCFAByte(dwarf::DW_CFA_offset_extended_sf);
EmitULEB128(Reg, "Reg");
EmitSLEB128(Offset, "Offset");
} else if (Reg < 64) {
Asm->EmitInt8(dwarf::DW_CFA_offset + Reg);
Asm->EOL("DW_CFA_offset + Reg (" + Twine(Reg) + ")");
EmitCFAByte(dwarf::DW_CFA_offset + Reg);
EmitULEB128(Offset, "Offset");
} else {
Asm->EmitInt8(dwarf::DW_CFA_offset_extended);
Asm->EOL("DW_CFA_offset_extended");
EmitCFAByte(dwarf::DW_CFA_offset_extended);
EmitULEB128(Reg, "Reg");
EmitULEB128(Offset, "Offset");
}

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

@ -91,6 +91,10 @@ public:
/// specifying (e.g. "LSDA").
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.
void EmitSLEB128(int Value, const char *Desc) const;