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

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 604efc974c0d48c83308ab5183be549aa416f88e..68f85035150cdb6c049e55d48244534fd5c22438 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -976,8 +976,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ CompareRoot(r3, 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);
@@ -3048,8 +3047,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
         VisitForTypeofValue(expr->expression());
       }
       __ mr(r6, r3);
-      TypeofStub typeof_stub(isolate());
-      __ CallStub(&typeof_stub);
+      __ Call(isolate()->builtins()->Typeof(), RelocInfo::CODE_TARGET);
       context()->Plug(r3);
       break;
     }
@@ -3419,8 +3417,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
       PopOperand(r4);
-      InstanceOfStub stub(isolate());
-      __ CallStub(&stub);
+      __ Call(isolate()->builtins()->InstanceOf(), RelocInfo::CODE_TARGET);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ CompareRoot(r3, Heap::kTrueValueRootIndex);
       Split(eq, if_true, if_false, fall_through);