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Fix Reassociate handling of constant in presence of undef float

Browse Source 
http://reviews.llvm.org/D6993

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226245 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mehdi Amini
2015-01-16 03:00:58 +00:00
parent dfe88a08c7
commit 525f296ef1
2 changed files with 31 additions and 3 deletions
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9
lib/Transforms/Scalar/Reassociate.cpp
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@ -917,10 +917,13 @@ void Reassociate::RewriteExprTree(BinaryOperator *I,
/// version of the value is returned, and BI is left pointing at the instruction
/// that should be processed next by the reassociation pass.
static Value *NegateValue(Value *V, Instruction *BI) {
if (ConstantFP *C = dyn_cast<ConstantFP>(V))
return ConstantExpr::getFNeg(C);
if (Constant *C = dyn_cast<Constant>(V))
if (Constant *C = dyn_cast<Constant>(V)) {
if (C->getType()->isFPOrFPVectorTy()) {
return ConstantExpr::getFNeg(C);
}
return ConstantExpr::getNeg(C);
}
// We are trying to expose opportunity for reassociation. One of the things
// that we want to do to achieve this is to push a negation as deep into an