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AsmParser: cleanup diagnostics for .rep/.rept

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Avoid double diagnostics for invalid expressions for count.  Improve caret
location for negative count.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198099 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool
2013-12-28 06:39:29 +00:00
parent b5191e98e8
commit 14b42a1c92
2 changed files with 51 additions and 3 deletions
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13
lib/MC/MCParser/AsmParser.cpp
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@ -3958,12 +3958,19 @@ void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
/// parseDirectiveRept
/// ::= .rep | .rept count
bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
const MCExpr *CountExpr;
SMLoc CountLoc = getTok().getLoc();
if (parseExpression(CountExpr))
return true;
int64_t Count;
if (parseAbsoluteExpression(Count))
return TokError("unexpected token in '" + Dir + "' directive");
if (!CountExpr->EvaluateAsAbsolute(Count)) {
eatToEndOfStatement();
return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
}
if (Count < 0)
return TokError("Count is negative");
return Error(CountLoc, "Count is negative");
if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '" + Dir + "' directive");