cache dereferenced iterator

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109093 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/RegionInfo.cpp b/lib/Analysis/RegionInfo.cpp
index 589cc471defca0dabdabbdf1a36f702f6f5b5006..4c07712abc493dde30853e9fb56d4f60f759b418 100644 (file)
--- a/lib/Analysis/RegionInfo.cpp
+++ b/lib/Analysis/RegionInfo.cpp
@@ -315,10 +315,11 @@ void Region::clearNodeCache() {
 
 bool RegionInfo::isCommonDomFrontier(BasicBlock *BB, BasicBlock *entry,
                                      BasicBlock *exit) const {
-  for (pred_iterator PI = pred_begin(BB), PE = pred_end(BB); PI != PE; ++PI)
-    if (DT->dominates(entry, *PI) && !DT->dominates(exit, *PI))
+  for (pred_iterator PI = pred_begin(BB), PE = pred_end(BB); PI != PE; ++PI) {
+    BasicBlock *P = *PI;
+    if (DT->dominates(entry, P) && !DT->dominates(exit, P))
       return false;
-
+  }
   return true;
 }