prevent GCSE from forwarding stores to loads around vaarg. This is uggly, and I...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22266 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/LoadValueNumbering.cpp b/lib/Analysis/LoadValueNumbering.cpp
index 16e79a1286f8b66a074ba5d8f4d3df6e87cf3a13..721fe47da882400841b35193253c6c30ddea5d5d 100644 (file)
--- a/lib/Analysis/LoadValueNumbering.cpp
+++ b/lib/Analysis/LoadValueNumbering.cpp
@@ -328,6 +328,10 @@ void LoadVN::getEqualNumberNodes(Value *V,
       LoadInvalidatedInBBBefore = true;
       break;
     }
+    if (dyn_cast<VAArgInst>(I)) {
+      LoadInvalidatedInBBBefore = true;
+      break;
+    }
   }
 
   // Figure out if the load is invalidated between the load and the exit of the