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Fix constant folding of constexprs

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5971 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-04-30 22:19:10 +00:00
parent 99df25f9f1
commit fe32e0c578
1 changed files with 3 additions and 6 deletions
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9
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -186,12 +186,9 @@ static inline Value *dyn_castNegVal(Value *V) {
if (BinaryOperator::isNeg(V)) if (BinaryOperator::isNeg(V))
return BinaryOperator::getNegArgument(cast<BinaryOperator>(V)); return BinaryOperator::getNegArgument(cast<BinaryOperator>(V));
// Constants can be considered to be negated values... // Constants can be considered to be negated values if they can be folded...
if (Constant *C = dyn_cast<Constant>(V)) { if (Constant *C = dyn_cast<Constant>(V))
Constant *NC = *Constant::getNullValue(V->getType()) - *C; return *Constant::getNullValue(V->getType()) - *C;
assert(NC && "Couldn't constant fold a subtract!");
return NC;
}
return 0; return 0;
} }