Do not apply the ARC move optimization to 'const'-qualified xvalues.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133861 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index 2782c2b..4c59e6a 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -2269,7 +2269,7 @@
   // If we're loading retained from a __strong xvalue, we can avoid 
   // an extra retain/release pair by zeroing out the source of this
   // "move" operation.
-  if (e->isXValue() &&
+  if (e->isXValue() && !e->getType().isConstQualified() &&
       e->getType().getObjCLifetime() == Qualifiers::OCL_Strong) {
     // Emit the lvalue
     LValue lv = CGF.EmitLValue(e);