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Fix issue with invalid flat operand number

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Avoid iterating over list of operands beyond the number of operands in it.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167634 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evandro Menezes 2012-11-09 20:29:37 +00:00
parent 12cfa11960
commit f1bb42152a
1 changed files with 6 additions and 1 deletions
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7
utils/TableGen/CodeEmitterGen.cpp
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@ -134,10 +134,15 @@ AddCodeToMergeInOperand(Record *R, BitsInit *BI, const std::string &VarName,
assert(!CGI.Operands.isFlatOperandNotEmitted(OpIdx) &&
"Explicitly used operand also marked as not emitted!");
} else {
unsigned NumberOps = CGI.Operands.size();
/// If this operand is not supposed to be emitted by the
/// generated emitter, skip it.
while (CGI.Operands.isFlatOperandNotEmitted(NumberedOp))
while (NumberedOp < NumberOps &&
CGI.Operands.isFlatOperandNotEmitted(NumberedOp))
++NumberedOp;
// If this operand has not been found, ignore it.
if (NumberedOp >= NumberOps)
return;
OpIdx = NumberedOp++;
}