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[LV] Ensure fixNonInductionPHIs uses a valid insertion point.

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In some cases, Builder's insertion point may be invalidated before using
it in VPTransformState::get. Make sure the insertion point is
up-to-date.

This should fix various sanitizer errors, like
https://lab.llvm.org/buildbot/#/builders/5/builds/4933/steps/9/logs/stdio
This commit is contained in:
Florian Hahn 2021-02-23 17:46:22 +00:00
parent a7e8ccf5c2
commit ff2fdde1f2
1 changed files with 2 additions and 0 deletions
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2
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -4374,6 +4374,8 @@ void InnerLoopVectorizer::fixNonInductionPHIs(VPTransformState &State) {
VPWidenPHIRecipe *VPPhi =
cast<VPWidenPHIRecipe>(State.Plan->getVPValue(OrigPhi));
PHINode *NewPhi = cast<PHINode>(State.get(VPPhi, 0));
// Make sure the builder has a valid insert point.
Builder.SetInsertPoint(NewPhi);
for (unsigned i = 0; i < VPPhi->getNumOperands(); ++i) {
VPValue *Inc = VPPhi->getIncomingValue(i);
VPBasicBlock *VPBB = VPPhi->getIncomingBlock(i);