Add analysis support for blocks. This includes a few key changes:

- Refactor the MemRegion hierarchy to distinguish between different StackSpaceRegions for locals and parameters.
- VarRegions for "captured" variables now have the BlockDataRegion as their super region (except those passed by reference)
- Add transfer function support to GRExprEngine for BlockDeclRefExprs.

This change also supports analyzing blocks as an analysis entry point
(top-of-the-stack), which required pushing more context-sensitivity
around in the MemRegion hierarchy via the use of LocationContext
objects.  Functionally almost everything is the same, except we track
LocationContexts in a few more areas and StackSpaceRegions now refer
to a StackFrameContext object.  In the future we will need to modify
MemRegionManager to allow multiple StackSpaceRegions in flight at once
(for the analysis of multiple stack frames).

llvm-svn: 90809

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/Analysis/ValueManager.cpp b/clang/lib/Analysis/ValueManager.cpp
index 1e7a5fced0a..d09137330cb 100644
--- a/clang/lib/Analysis/ValueManager.cpp
+++ b/clang/lib/Analysis/ValueManager.cpp
@@ -14,6 +14,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Analysis/PathSensitive/ValueManager.h"
+#include "clang/Analysis/PathSensitive/AnalysisContext.h"
 
 using namespace clang;
 using namespace llvm;
@@ -144,7 +145,8 @@ DefinedSVal ValueManager::getFunctionPointer(const FunctionDecl* FD) {
 DefinedSVal ValueManager::getBlockPointer(const BlockDecl *D,
                                           CanQualType locTy,
                                           const LocationContext *LC) {
-  const BlockTextRegion *BC = MemMgr.getBlockTextRegion(D, locTy);
+  const BlockTextRegion *BC =
+    MemMgr.getBlockTextRegion(D, locTy, LC->getAnalysisContext());
   const BlockDataRegion *BD = MemMgr.getBlockDataRegion(BC, LC);
   return loc::MemRegionVal(BD);
 }