PPC: Optimize the typeof operator.

src/ppc/full-codegen-ppc.cc

Index: src/ppc/full-codegen-ppc.cc
diff --git a/src/ppc/full-codegen-ppc.cc b/src/ppc/full-codegen-ppc.cc
index 27de1dcecb39cabe0595b73a8e6b16c8a872f7e5..39d6dae918abcad8d62e61f5fc55883a3f214722 100644
--- a/src/ppc/full-codegen-ppc.cc
+++ b/src/ppc/full-codegen-ppc.cc
@@ -4811,10 +4811,12 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
     case Token::TYPEOF: {
       Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
       {
-        StackValueContext context(this);
+        AccumulatorValueContext context(this);
         VisitForTypeofValue(expr->expression());
       }
-      __ CallRuntime(Runtime::kTypeof, 1);
+      __ mr(r6, r3);
+      TypeofStub typeof_stub(isolate());
+      __ CallStub(&typeof_stub);
       context()->Plug(r3);
       break;
     }