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LoopVectorize: Only strip casts from integer types when replacing symbolic

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strides

Fixes PR18480.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199291 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2014-01-15 03:35:46 +00:00
parent 574df95d7a
commit e96fec2e43
2 changed files with 42 additions and 4 deletions
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9
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -1072,9 +1072,10 @@ struct LoopVectorize : public LoopPass {
// LoopVectorizationCostModel.
//===----------------------------------------------------------------------===//
static Value *stripCast(Value *V) {
static Value *stripIntegerCast(Value *V) {
if (CastInst *CI = dyn_cast<CastInst>(V))
return CI->getOperand(0);
if (CI->getOperand(0)->getType()->isIntegerTy())
return CI->getOperand(0);
return V;
}
@ -1095,7 +1096,7 @@ static const SCEV *replaceSymbolicStrideSCEV(ScalarEvolution *SE,
Value *StrideVal = SI->second;
// Strip casts.
StrideVal = stripCast(StrideVal);
StrideVal = stripIntegerCast(StrideVal);
// Replace symbolic stride by one.
Value *One = ConstantInt::get(StrideVal->getType(), 1);
@ -1551,7 +1552,7 @@ InnerLoopVectorizer::addStrideCheck(Instruction *Loc) {
for (SmallPtrSet<Value *, 8>::iterator SI = Legal->strides_begin(),
SE = Legal->strides_end();
SI != SE; ++SI) {
Value *Ptr = stripCast(*SI);
Value *Ptr = stripIntegerCast(*SI);
Value *C = ChkBuilder.CreateICmpNE(Ptr, ConstantInt::get(Ptr->getType(), 1),
"stride.chk");
// Store the first instruction we create.