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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330677 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Max Kazantsev 2018-04-24 02:08:05 +00:00
parent 0a219a22e1
commit 76f6bf2a28
1 changed files with 4 additions and 2 deletions
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6
lib/Transforms/Utils/LoopRotationUtils.cpp
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@ -259,8 +259,10 @@ bool LoopRotate::rotateLoop(Loop *L, bool SimplifiedLatch) {
return false;
// Anything ScalarEvolution may know about this loop or the PHI nodes
// in its header will soon be invalidated, and it can also affect its parent
// loops as well.
// in its header will soon be invalidated. We should also invalidate
// all outer loops because insertion and deletion of blocks that happens
// during the rotation may violate invariants related to backedge taken
// infos in them.
if (SE)
SE->forgetTopmostLoop(L);