Simplify CFG after code generation is done

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2698 91177308-0d34-0410-b5e6-96231b3b80d8

tools/gccas/gccas.cpp

@@ -88,6 +88,7 @@ int main(int argc, char **argv) {
     // opened up by them.
     Passes.add(createInstructionCombiningPass());
     Passes.add(createDeadCodeEliminationPass());    // Remove Dead code/vars
+    Passes.add(createCFGSimplificationPass());      // Merge & remove BBs
   }
   Passes.add(new WriteBytecodePass(&Out));        // Write bytecode to file...