patch for PR9027 and // rdar://11861085

Title: [PR9027] volatile struct bug: member is not loaded at -O;
This is caused by last flag passed to @llvm.memcpy being false, 
not honoring that aggregate has at least one 'volatile' data member 
(even though aggregate itself has not been qualified as 'volatile'. 
As a result, optimization optimizes away the memcpy altogether.
Patch review by John MaCall (I still need to fix up a test though).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173535 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/CodeGen/CGValue.h b/lib/CodeGen/CGValue.h
index 7a2b8e30b1..01dee1f628 100644
--- a/lib/CodeGen/CGValue.h
+++ b/lib/CodeGen/CGValue.h
@@ -412,6 +412,10 @@ public:
     return Quals.hasVolatile();
   }
 
+  void setVolatile(bool flag) {
+    Quals.setVolatile(flag);
+  }
+  
   Qualifiers::ObjCLifetime getObjCLifetime() const {
     return Quals.getObjCLifetime();
   }