[PATCH] Fix leak in lib/CodeGen/CGException.cpp, PR18318

[Kostya Serebryany]

Hi chandlerc, dblaikie,

This fixes the leak described in http://llvm.org/bugs/show_bug.cgi?id=18318

http://llvm-reviews.chandlerc.com/D2474

Files:
  lib/CodeGen/CGException.cpp

Index: lib/CodeGen/CGException.cpp
===================================================================
--- lib/CodeGen/CGException.cpp
+++ lib/CodeGen/CGException.cpp
@@ -1244,6 +1244,8 @@
 
   // If the catch was not required, bail out now.
   if (!CatchScope.hasEHBranches()) {
+    for (unsigned I = 0; I != NumHandlers; ++I)
+      delete CatchScope.getHandler(I).Block;
     EHStack.popCatch();
     return;
   }
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