Under a compiler flag, -freset-local-blocks,

wipe out stack blocks when they go out of scope.
// rdar://9227352


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134045 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index 7eda0aa3fd..e99d872209 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -72,6 +72,7 @@ public:
   unsigned POSIXThreads      : 1; // Compiling with POSIX thread support
                                   // (-pthread)
   unsigned Blocks            : 1; // block extension to C
+  unsigned ResetLocalBlocks  : 1; // reset local blocks going out of scope
   unsigned EmitAllDecls      : 1; // Emit all declarations, even if
                                   // they are unused.
   unsigned MathErrno         : 1; // Math functions must respect errno
@@ -198,7 +199,7 @@ public:
 
     ThreadsafeStatics = 1;
     POSIXThreads = 0;
-    Blocks = 0;
+    Blocks = ResetLocalBlocks = 0;
     EmitAllDecls = 0;
     MathErrno = 1;
     SignedOverflowBehavior = SOB_Undefined;