Add support for invoke to the MemoryBuiltin analysid.

Update comments accordingly.

Make instcombine remove useless invokes to C++'s 'new' allocation function (test attached).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158937 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/InstCombine/InstructionCombining.cpp

@@ -1167,6 +1167,10 @@ Instruction *InstCombiner::visitMalloc(Instruction &MI) {
       }
       EraseInstFromFunction(*I);
     }
+
+    if (InvokeInst *II = dyn_cast<InvokeInst>(&MI)) {
+      BranchInst::Create(II->getNormalDest(), II->getParent());
+    }
     return EraseInstFromFunction(MI);
   }
   return 0;