MemRegion can refer to ASTContext without external help.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110784 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/OSAtomicChecker.cpp b/lib/Checker/OSAtomicChecker.cpp
index f5ada3c..02de0a8 100644
--- a/lib/Checker/OSAtomicChecker.cpp
+++ b/lib/Checker/OSAtomicChecker.cpp
@@ -110,7 +110,7 @@
   QualType LoadTy;
   if (const TypedRegion *TR =
       dyn_cast_or_null<TypedRegion>(location.getAsRegion())) {
-    LoadTy = TR->getValueType(Ctx);
+    LoadTy = TR->getValueType();
   }
   Engine.EvalLoad(Tmp, theValueExpr, C.getPredecessor(), 
                   state, location, OSAtomicLoadTag, LoadTy);
@@ -158,7 +158,7 @@
       // Handle implicit value casts.
       if (const TypedRegion *R =
           dyn_cast_or_null<TypedRegion>(location.getAsRegion())) {
-        val = SVator.EvalCast(val,R->getValueType(Ctx),newValueExpr->getType());
+        val = SVator.EvalCast(val,R->getValueType(), newValueExpr->getType());
       }
 
       Engine.EvalStore(TmpStore, NULL, theValueExpr, N,