commit 540c009fbe9567c008e0bfbcdb0f4f0f5b3a07f7
author Zhongxing Xu <xuzhongxing@gmail.com> Sun Jun 21 13:24:24 2009 +0000
committer Zhongxing Xu <xuzhongxing@gmail.com> Sun Jun 21 13:24:24 2009 +0000
tree a8264d8fb42604a5f7ef0fc251357dbc82d97d7b
parent 6ead59f8ed787d98c623222e8feb5cbc6a80dc1e

Return UnknownVal for pointer arithmetic on struct fields.

llvm-svn: 73851

clang/lib/Analysis/RegionStore.cpp

diff --git a/clang/lib/Analysis/RegionStore.cpp b/clang/lib/Analysis/RegionStore.cpp
index 6f316c9..5f2b8f8 100644
--- a/clang/lib/Analysis/RegionStore.cpp
+++ b/clang/lib/Analysis/RegionStore.cpp
@@ -773,8 +773,13 @@
     SVal ZeroIdx = ValMgr.makeZeroArrayIndex();
     ER = MRMgr.getElementRegion(EleTy, ZeroIdx, AR, getContext());
   } 
-  else
+  else if (isa<FieldRegion>(MR)) {
+    // Not track pointer arithmetic on struct fields.
+    return UnknownVal();
+  }
+  else {
     ER = cast<ElementRegion>(MR);
+  }
 
   SVal Idx = ER->getIndex();