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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278438 91177308-0d34-0410-b5e6-96231b3b80d8
Karbin74 · Aug 11, 2016 · b9ecebc · b9ecebc
1 parent 161e82b
commit b9ecebc
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/Analysis/AliasSetTracker.cpp b/lib/Analysis/AliasSetTracker.cpp
@@ -468,8 +468,9 @@ void AliasSetTracker::copyValue(Value *From, Value *To) {
   AliasSet::PointerRec &Entry = getEntryFor(To);
   if (Entry.hasAliasSet()) return;    // Already in the tracker!
 
-  // Add it to the alias set it aliases...
+  // getEntryFor above may invalidate iterator \c I, so reinitialize it.
   I = PointerMap.find_as(From);
+  // Add it to the alias set it aliases...
   AliasSet *AS = I->second->getAliasSet(*this);
   AS->addPointer(*this, Entry, I->second->getSize(),
                  I->second->getAAInfo(),