Handle alias sets that have been unified, and thus can have other references

to them.  This fixes a regression in my previous checkin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28951 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/AliasSetTracker.cpp b/lib/Analysis/AliasSetTracker.cpp
index f805a43b4e78ace61ef1197d70e9d779870472f4..16c652117f563040b23d29229cde46cb213b38d3 100644 (file)
--- a/lib/Analysis/AliasSetTracker.cpp
+++ b/lib/Analysis/AliasSetTracker.cpp
@@ -378,9 +378,9 @@ void AliasSetTracker::remove(AliasSet &AS) {
   }
   
   // Stop using the alias set, removing it.
-  assert(AS.RefCount == NumRefs);
-  AS.RefCount = 0;
-  AS.removeFromTracker(*this);
+  AS.RefCount -= NumRefs;
+  if (AS.RefCount == 0)
+    AS.removeFromTracker(*this);
 }
 
 bool AliasSetTracker::remove(Value *Ptr, unsigned Size) {