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| author | Dan Gohman <gohman@apple.com> | 2009-05-02 17:29:26 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-05-02 17:29:26 +0000 |
| commit | 0981ea4cda6a0b70c70729826c82096235a4c1e8 (patch) | |
| tree | df01c72dbe243a4bfdffc021150099b35382d201 /lib/Transforms | |
| parent | 3e5206d4aa51829b72fd7b2b42652a484cfb9316 (diff) | |
| download | external_llvm-0981ea4cda6a0b70c70729826c82096235a4c1e8.zip external_llvm-0981ea4cda6a0b70c70729826c82096235a4c1e8.tar.gz external_llvm-0981ea4cda6a0b70c70729826c82096235a4c1e8.tar.bz2 | |
Tell ScalarEvolution that the loop is being deleted before actually
deleting it. This will let ScalarEvolution be more complete about
updating its records.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70632 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/LoopDeletion.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/LoopDeletion.cpp b/lib/Transforms/Scalar/LoopDeletion.cpp index d7be820..83c2561 100644 --- a/lib/Transforms/Scalar/LoopDeletion.cpp +++ b/lib/Transforms/Scalar/LoopDeletion.cpp @@ -258,6 +258,11 @@ bool LoopDeletion::runOnLoop(Loop* L, LPPassManager& LPM) { (*LI)->dropAllReferences(); } + // Tell ScalarEvolution that the loop is deleted. Do this before + // deleting the loop so that ScalarEvolution can look at the loop + // to determine what it needs to clean up. + SE.forgetLoopBackedgeTakenCount(L); + // Erase the instructions and the blocks without having to worry // about ordering because we already dropped the references. // NOTE: This iteration is safe because erasing the block does not remove its @@ -266,9 +271,6 @@ bool LoopDeletion::runOnLoop(Loop* L, LPPassManager& LPM) { LI != LE; ++LI) (*LI)->eraseFromParent(); - // Tell ScalarEvolution that the loop is deleted. - SE.forgetLoopBackedgeTakenCount(L); - // Finally, the blocks from loopinfo. This has to happen late because // otherwise our loop iterators won't work. LoopInfo& loopInfo = getAnalysis<LoopInfo>(); |