[llvm] r236561 - [WinEH] Reset WinEHPrepare::SEHExceptionCodeSlot when we're done.

[Ahmed Bougacha]

Author: ab
Date: Tue May  5 20:28:58 2015
New Revision: 236561

URL: http://llvm.org/viewvc/llvm-project?rev=236561&view=rev
Log:
[WinEH] Reset WinEHPrepare::SEHExceptionCodeSlot when we're done.

This caused a use-after-free on test/CodeGen/X86/win32-eh.ll
No functional change intended.

Modified:
    llvm/trunk/lib/CodeGen/WinEHPrepare.cpp

Modified: llvm/trunk/lib/CodeGen/WinEHPrepare.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/WinEHPrepare.cpp?rev=236561&r1=236560&r2=236561&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/WinEHPrepare.cpp (original)
+++ llvm/trunk/lib/CodeGen/WinEHPrepare.cpp Tue May  5 20:28:58 2015
@@ -934,6 +934,7 @@ bool WinEHPrepare::prepareExceptionHandl
   CleanupHandlerMap.clear();
   HandlerToParentFP.clear();
   DT = nullptr;
+  SEHExceptionCodeSlot = nullptr;
 
   return HandlersOutlined;
 }