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implement .cfi_adjust_cfa_offset.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129296 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-04-11 20:29:16 +00:00
parent 2227f154eb
commit 53abbe5064
1 changed files with 28 additions and 1 deletions

29
lib/MC/MCParser/AsmParser.cpp

@ -80,6 +80,7 @@ private:
SourceMgr &SrcMgr;
MCAsmParserExtension *GenericParser;
MCAsmParserExtension *PlatformParser;
int64_t LastOffset;
/// This is the current buffer index we're lexing from as managed by the
/// SourceMgr object.
@ -140,6 +141,14 @@ public:
/// }
int64_t adjustLastOffset(int64_t Adjustment) {
LastOffset += Adjustment;
return LastOffset;
}
void setLastOffset(int64_t Offset) {
LastOffset = Offset;
}
private:
void CheckForValidSection();
@ -251,6 +260,8 @@ public:
".cfi_def_cfa");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>(
".cfi_def_cfa_offset");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset>(
".cfi_adjust_cfa_offset");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>(
".cfi_def_cfa_register");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>(
@ -287,6 +298,7 @@ public:
bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIAdjustCfaOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
@ -315,7 +327,7 @@ enum { DEFAULT_ADDRSPACE = 0 };
AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
MCStreamer &_Out, const MCAsmInfo &_MAI)
: Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM),
GenericParser(new GenericAsmParser), PlatformParser(0),
GenericParser(new GenericAsmParser), PlatformParser(0), LastOffset(0),
CurBuffer(0), MacrosEnabled(true) {
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
@ -2309,6 +2321,21 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
if (getParser().ParseAbsoluteExpression(Offset))
return true;
getParser().setLastOffset(Offset);
return getStreamer().EmitCFIDefCfaOffset(Offset);
}
/// ParseDirectiveCFIAdjustCfaOffset
/// ::= .cfi_adjust_cfa_offset adjustment
bool GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset(StringRef,
SMLoc DirectiveLoc) {
int64_t Adjustment = 0;
if (getParser().ParseAbsoluteExpression(Adjustment))
return true;
int64_t Offset = getParser().adjustLastOffset(Adjustment);
return getStreamer().EmitCFIDefCfaOffset(Offset);
}