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ARM assembly parsing allows constant expressions for lane indices. 

llvm-svn: 147028
This commit is contained in:
Jim Grosbach 2011-12-21 01:19:23 +00:00
parent afbe7520a6
commit 7de7ab83fa
1 changed files with 25 additions and 14 deletions
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39
llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
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@ -2831,21 +2831,32 @@ parseVectorLane(VectorLaneTy &LaneKind, unsigned &Index) {
Parser.Lex(); // Eat the ']'.
return MatchOperand_Success;
}
if (Parser.getTok().is(AsmToken::Integer)) {
int64_t Val = Parser.getTok().getIntVal();
// Make this range check context sensitive for .8, .16, .32.
if (Val < 0 && Val > 7)
Error(Parser.getTok().getLoc(), "lane index out of range");
Index = Val;
LaneKind = IndexedLane;
Parser.Lex(); // Eat the token;
if (Parser.getTok().isNot(AsmToken::RBrac))
Error(Parser.getTok().getLoc(), "']' expected");
Parser.Lex(); // Eat the ']'.
return MatchOperand_Success;
const MCExpr *LaneIndex;
SMLoc Loc = Parser.getTok().getLoc();
if (getParser().ParseExpression(LaneIndex)) {
Error(Loc, "illegal expression");
return MatchOperand_ParseFail;
}
Error(Parser.getTok().getLoc(), "lane index must be empty or an integer");
return MatchOperand_ParseFail;
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LaneIndex);
if (!CE) {
Error(Loc, "lane index must be empty or an integer");
return MatchOperand_ParseFail;
}
if (Parser.getTok().isNot(AsmToken::RBrac)) {
Error(Parser.getTok().getLoc(), "']' expected");
return MatchOperand_ParseFail;
}
Parser.Lex(); // Eat the ']'.
int64_t Val = CE->getValue();
// FIXME: Make this range check context sensitive for .8, .16, .32.
if (Val < 0 || Val > 7) {
Error(Parser.getTok().getLoc(), "lane index out of range");
return MatchOperand_ParseFail;
}
Index = Val;
LaneKind = IndexedLane;
return MatchOperand_Success;
}
LaneKind = NoLanes;
return MatchOperand_Success;