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[ms-inline asm] Perform field lookups with the dot operator.

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llvm-svn: 166724
This commit is contained in:
Chad Rosier 2012-10-25 21:51:10 +00:00
parent 0ccb9515e1
commit a9537e1bfc
2 changed files with 21 additions and 4 deletions
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2
include/llvm/MC/MCParser/MCAsmParser.h
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@ -37,6 +37,8 @@ public:
virtual ~MCAsmParserSemaCallback();
virtual void *LookupInlineAsmIdentifier(StringRef Name, void *Loc,
unsigned &Size) = 0;
virtual bool LookupInlineAsmField(StringRef Base, StringRef Member,
unsigned &Offset) = 0;
};
/// MCAsmParser - Generic assembler parser interface, for use by target specific

23
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -841,15 +841,30 @@ bool X86AsmParser::ParseIntelDotOperator(const MCExpr *Disp,
APInt DotDisp;
DotDispStr.getAsInteger(10, DotDisp);
DotDispVal = DotDisp.getZExtValue();
} else if (Tok.is(AsmToken::Identifier)) {
// We should only see an identifier when parsing the original inline asm.
// The front-end should rewrite this in terms of immediates.
assert (isParsingInlineAsm() && "Unexpected field name!");
unsigned DotDisp;
std::pair<StringRef, StringRef> BaseMember = DotDispStr.split('.');
if (SemaCallback->LookupInlineAsmField(BaseMember.first, BaseMember.second,
DotDisp)) {
Err = "Unable to lookup field reference!";
return true;
}
DotDispVal = DotDisp;
} else {
Err = "Unexpected token type!";
return true;
}
// Special case zero dot displacement.
if (!DotDispVal) {
*NewDisp = Disp;
return false;
if (isParsingInlineAsm() && Tok.is(AsmToken::Identifier)) {
SMLoc Loc = SMLoc::getFromPointer(DotDispStr.data());
unsigned Len = DotDispStr.size();
unsigned Val = OrigDispVal + DotDispVal;
InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_DotOperator, Loc, Len,
Val));
}
*NewDisp = MCConstantExpr::Create(OrigDispVal + DotDispVal, getContext());