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authorShuxin Yang <shuxin.llvm@gmail.com>2013-11-12 08:33:03 +0000
committerShuxin Yang <shuxin.llvm@gmail.com>2013-11-12 08:33:03 +0000
commite26299d76e4b1ef0fa9bfc89d55dd1a28a1220f4 (patch)
tree827d5ce1eca6bd2bcecbe8dd33677b3a8e48d66f /lib/Transforms/Scalar
parentc3f4491d91c994a7fe65b2858e33c66e7a4e9f66 (diff)
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Correct a glitch in r194424 which may invalidate iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194457 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar')
-rw-r--r--lib/Transforms/Scalar/GVN.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index d353765..6af269d 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -2730,7 +2730,9 @@ void GVN::addDeadBlock(BasicBlock *BB) {
if (DeadBlocks.count(B))
continue;
- for (pred_iterator PI = pred_begin(B), PE = pred_end(B); PI != PE; PI++) {
+ SmallVector<BasicBlock *, 4> Preds(pred_begin(B), pred_end(B));
+ for (SmallVectorImpl<BasicBlock *>::iterator PI = Preds.begin(),
+ PE = Preds.end(); PI != PE; PI++) {
BasicBlock *P = *PI;
if (!DeadBlocks.count(P))