From 703db197e36af320f3612be16f276a4c01e8ef29 Mon Sep 17 00:00:00 2001
From: Zhongxing Xu <xuzhongxing@gmail.com>
Date: Tue, 30 Jun 2009 13:00:53 +0000
Subject: [PATCH] Instead of r74522, use another approach to fix
 xfail_regionstore_wine_crash.c. Mark the super region of the binding of block
 level expr in the Environment as live.

llvm-svn: 74525
---
 clang/lib/Analysis/Environment.cpp   | 13 +++++++++++--
 clang/lib/Analysis/LiveVariables.cpp |  1 -
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Analysis/Environment.cpp b/clang/lib/Analysis/Environment.cpp
index 2b751df830c2..1c2802e7fe98 100644
--- a/clang/lib/Analysis/Environment.cpp
+++ b/clang/lib/Analysis/Environment.cpp
@@ -143,8 +143,17 @@ EnvironmentManager::RemoveDeadBindings(Environment Env, Stmt* Loc,
       SVal X = I.getData();
 
       // If the block expr's value is a memory region, then mark that region.
-      if (isa<loc::MemRegionVal>(X))
-        DRoots.push_back(cast<loc::MemRegionVal>(X).getRegion());
+      if (isa<loc::MemRegionVal>(X)) {
+        const MemRegion* R = cast<loc::MemRegionVal>(X).getRegion();
+        DRoots.push_back(R);
+        // Mark the super region of the RX as live.
+        // e.g.: int x; char *y = (char*) &x; if (*y) ... 
+        // 'y' => element region. 'x' is its super region.
+        // We only add one level super region for now.
+        if (const SubRegion *SR = dyn_cast<SubRegion>(R)) {
+          DRoots.push_back(SR->getSuperRegion());
+        }
+      }
 
       // Mark all symbols in the block expr's value live.
       MarkLiveCallback cb(SymReaper);
diff --git a/clang/lib/Analysis/LiveVariables.cpp b/clang/lib/Analysis/LiveVariables.cpp
index b354566db02f..aead7f43ad8f 100644
--- a/clang/lib/Analysis/LiveVariables.cpp
+++ b/clang/lib/Analysis/LiveVariables.cpp
@@ -138,7 +138,6 @@ void TransferFuncs::Visit(Stmt *S) {
   else {
     // For block-level expressions, mark that they are live.
     LiveState(S,AD) = Alive;
-    StmtVisitor<TransferFuncs,void>::Visit(S);
   }
 }