Don't corrupt memory when removing an instruction from the program, but

not the worklist


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6733 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/GCSE.cpp

@@ -120,6 +120,7 @@ bool GCSE::EliminateRedundancies(Instruction *I,
 
           // Erase the instruction from the program.
           I->getParent()->getInstList().erase(I);
+          WorkList.erase(I);
         }
       
       return true;