Split HCompareGeneric in a test and a branch part.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index cd852f5c1a37686d573ecbedaaaf3076aba14b55..29dbcaaf6d62b21041e0c9dee8f8abe4434794e3 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -8319,10 +8319,12 @@ void HOptimizedGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
     if (combined_rep.IsTagged() || combined_rep.IsNone()) {
       HCompareGeneric* result =
           new(zone()) HCompareGeneric(context, left, right, op);
+      AddInstruction(result);
       result->set_observed_input_representation(1, left_rep);
       result->set_observed_input_representation(2, right_rep);
       result->set_position(expr->position());
-      return ast_context()->ReturnInstruction(result, expr->id());
+      return ast_context()->ReturnControl(AndBranch(result, op, expr->id()),
+                                          expr->id());
     } else {
       HCompareNumericAndBranch* result =
           New<HCompareNumericAndBranch>(left, right, op);