r193441 - Minor performance improvement to not do unnecessary work

[Fariborz Jahanian]

Author: fjahanian
Date: Fri Oct 25 17:04:47 2013
New Revision: 193441

URL: http://llvm.org/viewvc/llvm-project?rev=193441&view=rev
Log:
Minor performance improvement to not do unnecessary work
in my last patch. // rdar://14989999

Modified:
    cfe/trunk/lib/Sema/SemaExpr.cpp

Modified: cfe/trunk/lib/Sema/SemaExpr.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExpr.cpp?rev=193441&r1=193440&r2=193441&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaExpr.cpp (original)
+++ cfe/trunk/lib/Sema/SemaExpr.cpp Fri Oct 25 17:04:47 2013
@@ -2257,12 +2257,14 @@ Sema::LookupInObjCMethod(LookupResult &L
         return ExprError();
 
       MarkAnyDeclReferenced(Loc, IV, true);
-      // Mark this ivar 'referenced' in this method, if it is a backing ivar
-      // of a property and current method is one of its property accessor.
-      const ObjCPropertyDecl *PDecl;
-      const ObjCIvarDecl *BIV = GetIvarBackingPropertyAccessor(CurMethod, PDecl);
-      if (BIV && BIV == IV)
-        IV->setBackingIvarReferencedInAccessor(true);
+      if (!IV->getBackingIvarReferencedInAccessor()) {
+        // Mark this ivar 'referenced' in this method, if it is a backing ivar
+        // of a property and current method is one of its property accessor.
+        const ObjCPropertyDecl *PDecl;
+        const ObjCIvarDecl *BIV = GetIvarBackingPropertyAccessor(CurMethod, PDecl);
+        if (BIV && BIV == IV)
+          IV->setBackingIvarReferencedInAccessor(true);
+      }
       
       ObjCMethodFamily MF = CurMethod->getMethodFamily();
       if (MF != OMF_init && MF != OMF_dealloc && MF != OMF_finalize &&