Enhances SCA to process untyped region to typed region conversion.
 - RegionView and RegionViewMap is introduced to assist back-mapping from
   super region to subregions.
 - GDM is used to carry RegionView information.
 - AnonTypedRegion is added to represent a typed region introduced by pointer
   casting. Later AnonTypedRegion can be used in other similar cases, e.g.,
   malloc()'ed region.
 - The specific conversion is delegated to store manager.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59382 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/BasicStore.cpp b/lib/Analysis/BasicStore.cpp
index 4197c08..8b5ef6e 100644
--- a/lib/Analysis/BasicStore.cpp
+++ b/lib/Analysis/BasicStore.cpp
@@ -65,6 +65,12 @@
   /// ArrayToPointer - Used by GRExprEngine::VistCast to handle implicit
   ///  conversions between arrays and pointers.
   SVal ArrayToPointer(SVal Array) { return Array; }
+
+  const GRState* CastRegion(const GRState* St, SVal VoidPtr, QualType CastToTy,
+                            Stmt* CastE) {
+    return St;
+  }
+
   
   /// getSelfRegion - Returns the region for the 'self' (Objective-C) or
   ///  'this' object (C++).  When used when analyzing a normal function this