Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40897 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index 130db9f..f0c09e6 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -777,8 +777,8 @@
if (LBBI != DF->end()) {
DominanceFrontier::DomSetType &LBSet = LBBI->second;
for (DominanceFrontier::DomSetType::iterator LI = LBSet.begin(),
- LE = LBSet.end(); LI != LE; ++LI) {
- BasicBlock *B = *LI;
+ LE = LBSet.end(); LI != LE; /* NULL */) {
+ BasicBlock *B = *LI++;
if (OutSiders.count(B))
DF->removeFromFrontier(LBBI, B);
}
@@ -789,8 +789,8 @@
if (NBBI != DF->end()) {
DominanceFrontier::DomSetType NBSet = NBBI->second;
for (DominanceFrontier::DomSetType::iterator NI = NBSet.begin(),
- NE = NBSet.end(); NI != NE; ++NI) {
- BasicBlock *B = *NI;
+ NE = NBSet.end(); NI != NE; /* NULL */) {
+ BasicBlock *B = *NI++;
if (OutSiders.count(B))
DF->removeFromFrontier(NBBI, B);
}