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[ms-inline asm] If the state of the parser is ignore, then don't parse the

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inline assembly.  Also make sure the remove the ignored statements from the IR.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166357 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier 2012-10-20 00:47:08 +00:00
parent 4ade92b614
commit 17feeec8d8
1 changed files with 25 additions and 2 deletions
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27
lib/MC/MCParser/AsmParser.cpp
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@ -1138,7 +1138,7 @@ bool AsmParser::ParseStatement() {
return ParseDirectiveEndIf(IDLoc);
// If we are in a ".if 0" block, ignore this statement.
if (TheCondState.Ignore && !ParsingInlineAsm) {
if (TheCondState.Ignore) {
EatToEndOfStatement();
return false;
}
@ -3579,7 +3579,8 @@ enum AsmOpRewriteKind {
AOK_Imm,
AOK_Input,
AOK_Output,
AOK_SizeDirective
AOK_SizeDirective,
AOK_Skip
};
struct AsmOpRewrite {
@ -3619,9 +3620,24 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
// Clear the opcode.
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())
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(AsmOpRewrite(AOK_Skip, Start, Len));
continue;
}
if (isInstruction()) {
const MCInstrDesc &Desc = MII->get(getOpcode());
@ -3727,8 +3743,15 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
OS << StringRef(Start, Loc - Start);
PrevKind = Kind;
// Skip the original expression.
if (Kind == AOK_Skip) {
Start = Loc + (*I).Len;
continue;
}
// Rewrite expressions in $N notation.
switch (Kind) {
default: break;
case AOK_Imm:
OS << Twine("$$") + StringRef(Loc, (*I).Len);
break;