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Add support for specifying register name in cfi-register/offset/def

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as well as register number.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124379 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Roman Divacky 2011-01-27 17:16:37 +00:00
parent bf7553210a
commit 54b0f4f2a4
2 changed files with 24 additions and 4 deletions
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26
lib/MC/MCParser/AsmParser.cpp
View File

@ -30,6 +30,7 @@
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetAsmParser.h"
#include <cctype>
#include <vector>
@ -274,6 +275,8 @@ public:
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".uleb128");
}
bool ParseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
@ -2181,12 +2184,28 @@ bool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) {
return getStreamer().EmitCFIEndProc();
}
/// ParseRegisterOrRegisterNumber - parse register name or number.
bool GenericAsmParser::ParseRegisterOrRegisterNumber(int64_t &Register,
SMLoc DirectiveLoc) {
unsigned RegNo;
if (getLexer().is(AsmToken::Percent)) {
if (getParser().getTargetParser().ParseRegister(RegNo, DirectiveLoc,
DirectiveLoc))
return true;
Register = getContext().getTargetAsmInfo().getDwarfRegNum(RegNo, true);
} else
return getParser().ParseAbsoluteExpression(Register);
return false;
}
/// ParseDirectiveCFIDefCfa
/// ::= .cfi_def_cfa register, offset
bool GenericAsmParser::ParseDirectiveCFIDefCfa(StringRef,
SMLoc DirectiveLoc) {
int64_t Register = 0;
if (getParser().ParseAbsoluteExpression(Register))
if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
return true;
if (getLexer().isNot(AsmToken::Comma))
@ -2216,7 +2235,7 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
SMLoc DirectiveLoc) {
int64_t Register = 0;
if (getParser().ParseAbsoluteExpression(Register))
if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
return true;
return getStreamer().EmitCFIDefCfaRegister(Register);
@ -2227,7 +2246,8 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
bool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) {
int64_t Register = 0;
int64_t Offset = 0;
if (getParser().ParseAbsoluteExpression(Register))
if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
return true;
if (getLexer().isNot(AsmToken::Comma))

2
test/MC/ELF/cfi-offset.s
View File

@ -3,7 +3,7 @@
f:
.cfi_startproc
nop
.cfi_offset 6, -16
.cfi_offset %ebp, -16
nop
.cfi_endproc