Implement releaseMemory in CodeGenPrepare and free the BackEdges
container data. This prevents it from holding onto dangling
pointers and potentially behaving unpredictably.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95409 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index c3139a5..fa60d3f 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -63,6 +63,10 @@
AU.addPreserved<ProfileInfo>();
}
+ virtual void releaseMemory() {
+ BackEdges.clear();
+ }
+
private:
bool EliminateMostlyEmptyBlocks(Function &F);
bool CanMergeBlocks(const BasicBlock *BB, const BasicBlock *DestBB) const;