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LoopVectorize: Don't assume pointees are sized

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A pointer's pointee might not be sized: the pointee could be a function.

Report this as IK_NoInduction when calculating isInductionVariable.

This fixes PR21508.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221501 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2014-11-07 00:31:14 +00:00
parent 98066413ca
commit bb642c4369
2 changed files with 31 additions and 1 deletions
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lib/Transforms/Vectorize/LoopVectorize.cpp
+7 -1
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@@ -5265,7 +5265,13 @@ LoopVectorizationLegality::isInductionVariable(PHINode *Phi) {
return IK_NoInduction;
assert(PhiTy->isPointerTy() && "The PHI must be a pointer");
uint64_t Size = DL->getTypeAllocSize(PhiTy->getPointerElementType());
Type *PointerElementType = PhiTy->getPointerElementType();
// The pointer stride cannot be determined if the pointer element type is not
// sized.
if (!PointerElementType->isSized())
return IK_NoInduction;
uint64_t Size = DL->getTypeAllocSize(PointerElementType);
if (C->getValue()->equalsInt(Size))
return IK_PtrInduction;
else if (C->getValue()->equalsInt(0 - Size))