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
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 @@
(*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 @@
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>();