fix the regression I introduced in r159385 (it's necessary to update PHI nodes in unwind BB

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159534 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/SimplifyCFGPass.cpp

@@ -99,6 +99,9 @@ static void ChangeToCall(InvokeInst *II) {
 
   // Follow the call by a branch to the normal destination.
   BranchInst::Create(II->getNormalDest(), II);
+
+  // Update PHI nodes in the unwind destination
+  II->getUnwindDest()->removePredecessor(II->getParent());
   II->eraseFromParent();
 }