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author | Dan Gohman <gohman@apple.com> | 2009-02-23 17:10:29 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-02-23 17:10:29 +0000 |
commit | e2abdd3ff0dd54a59edbd114ebb1d7728040a2d9 (patch) | |
tree | 52bb762d44c28adbae6584b38ab1b56ac17e51f7 /lib | |
parent | 834db732ba19efaa7cdcd74036ee167b4e818c7b (diff) | |
download | llvm-e2abdd3ff0dd54a59edbd114ebb1d7728040a2d9.tar.gz llvm-e2abdd3ff0dd54a59edbd114ebb1d7728040a2d9.tar.bz2 llvm-e2abdd3ff0dd54a59edbd114ebb1d7728040a2d9.tar.xz |
LoopDeletion needs to inform ScalarEvolution when a loop is deleted,
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
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Transforms/Scalar/LoopDeletion.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LoopDeletion.cpp b/lib/Transforms/Scalar/LoopDeletion.cpp index 86edcfaac8..ac807a4c9b 100644 --- a/lib/Transforms/Scalar/LoopDeletion.cpp +++ b/lib/Transforms/Scalar/LoopDeletion.cpp @@ -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>(); |