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[ms-inline asm] Don't rewrite out parts of an inline-asm skipped by .if 0 and friends.

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It's unnecessary and makes the generated assembly less faithful to the original source.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166440 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2012-10-22 20:50:25 +00:00
parent a703fb9e5e
commit 8ee16c7b66
1 changed files with 1 additions and 24 deletions
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25
lib/MC/MCParser/AsmParser.cpp
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@ -3579,8 +3579,7 @@ enum AsmRewriteKind {
AOK_Imm, AOK_Imm,
AOK_Input, AOK_Input,
AOK_Output, AOK_Output,
AOK_SizeDirective, AOK_SizeDirective
AOK_Skip
}; };
struct AsmRewrite { struct AsmRewrite {
@ -3620,24 +3619,9 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
// Clear the opcode. // Clear the opcode.
setOpcode(~0x0); setOpcode(~0x0);
// Save the conditional ignore state of the parser prior to parsing the statement.
bool PreParseCondStateIgnore = TheCondState.Ignore;
// Save the starting point of this statement in case we need to skip it.
SMLoc Start = getLexer().getLoc();
if (ParseStatement()) if (ParseStatement())
return true; return true;
// If PreParseCondStateIgnore is false, but TheCondState.Ignore is true, then we
// just parsed a directive that changed the state to ignore. Don't skip
// emitting this directive.
if (PreParseCondStateIgnore && TheCondState.Ignore) {
unsigned Len = getLexer().getLoc().getPointer() - Start.getPointer();
AsmStrRewrites.push_back(AsmRewrite(AOK_Skip, Start, Len));
continue;
}
if (isInstruction()) { if (isInstruction()) {
const MCInstrDesc &Desc = MII->get(getOpcode()); const MCInstrDesc &Desc = MII->get(getOpcode());
@ -3743,15 +3727,8 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
OS << StringRef(Start, Loc - Start); OS << StringRef(Start, Loc - Start);
PrevKind = Kind; PrevKind = Kind;
// Skip the original expression.
if (Kind == AOK_Skip) {
Start = Loc + (*I).Len;
continue;
}
// Rewrite expressions in $N notation. // Rewrite expressions in $N notation.
switch (Kind) { switch (Kind) {
default: break;
case AOK_Imm: case AOK_Imm:
OS << Twine("$$") + StringRef(Loc, (*I).Len); OS << Twine("$$") + StringRef(Loc, (*I).Len);
break; break;