[turbofan] JSGenericLowering mostly uses builtins instead of code stubs now

src/full-codegen/s390/full-codegen-s390.cc

Index: src/full-codegen/s390/full-codegen-s390.cc
diff --git a/src/full-codegen/s390/full-codegen-s390.cc b/src/full-codegen/s390/full-codegen-s390.cc
index 5fbeb167667aae346cdc3673222e2ceac0943e44..8a50eeec9d195ae0e1d2c80130b1147cad8aaeaa 100644
--- a/src/full-codegen/s390/full-codegen-s390.cc
+++ b/src/full-codegen/s390/full-codegen-s390.cc
@@ -946,8 +946,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ CompareRoot(r2, Heap::kUndefinedValueRootIndex);
   __ beq(&exit);
   __ bind(&convert);
-  ToObjectStub stub(isolate());
-  __ CallStub(&stub);
+  __ Call(isolate()->builtins()->ToObject(), RelocInfo::CODE_TARGET);
   RestoreContext();
   __ bind(&done_convert);
   PrepareForBailoutForId(stmt->ToObjectId(), BailoutState::TOS_REGISTER);
@@ -2970,8 +2969,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
         VisitForTypeofValue(expr->expression());
       }
       __ LoadRR(r5, r2);
-      TypeofStub typeof_stub(isolate());
-      __ CallStub(&typeof_stub);
+      __ Call(isolate()->builtins()->Typeof(), RelocInfo::CODE_TARGET);
       context()->Plug(r2);
       break;
     }
@@ -3335,8 +3333,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
       PopOperand(r3);
-      InstanceOfStub stub(isolate());
-      __ CallStub(&stub);
+      __ Call(isolate()->builtins()->InstanceOf(), RelocInfo::CODE_TARGET);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ CompareRoot(r2, Heap::kTrueValueRootIndex);
       Split(eq, if_true, if_false, fall_through);