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LoopDeletion needs to inform ScalarEvolution when a loop is deleted,

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so that ScalarEvolution doesn't hang onto a dangling Loop*, which
could be a problem if another Loop happens to get allocated at the
same address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65323 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-02-23 17:10:29 +00:00
parent 834db732ba
commit e2abdd3ff0
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Scalar/LoopDeletion.cpp
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@ -260,7 +260,10 @@ bool LoopDeletion::runOnLoop(Loop* L, LPPassManager& LPM) {
for (Loop::block_iterator LI = L->block_begin(), LE = L->block_end();
LI != LE; ++LI)
(*LI)->eraseFromParent();
// Tell ScalarEvolution that the loop is deleted.
SE.forgetLoopIterationCount(L);
// Finally, the blocks from loopinfo. This has to happen late because
// otherwise our loop iterators won't work.
LoopInfo& loopInfo = getAnalysis<LoopInfo>();