Fix Object.prototype.toString.call(proxy)

src/crankshaft/ppc/lithium-codegen-ppc.cc

Index: src/crankshaft/ppc/lithium-codegen-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-codegen-ppc.cc b/src/crankshaft/ppc/lithium-codegen-ppc.cc
index d1e2c223e18c66a8bdd6e6452443ae11b2085732..6e260e8628f01109361b872f17cdf0fa23401eaf 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -2614,14 +2614,11 @@ void LCodeGen::EmitClassOfTest(Label* is_true, Label* is_false,
     // Assuming the following assertions, we can use the same compares to test
     // for both being a function type and being in the object type range.
     STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
-    STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE ==
-                  FIRST_JS_RECEIVER_TYPE + 1);
     STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE ==
                   LAST_JS_RECEIVER_TYPE - 1);
     STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
     __ CompareObjectType(input, temp, temp2, FIRST_JS_RECEIVER_TYPE);
     __ blt(is_false);
-    __ beq(is_true);
     __ cmpi(temp2, Operand(LAST_JS_RECEIVER_TYPE));
     __ beq(is_true);
   } else {
@@ -2629,9 +2626,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true, Label* is_false,
     // actual type and do a signed compare with the width of the type range.
     __ LoadP(temp, FieldMemOperand(input, HeapObject::kMapOffset));
     __ lbz(temp2, FieldMemOperand(temp, Map::kInstanceTypeOffset));
-    __ subi(temp2, temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+    __ subi(temp2, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
     __ cmpi(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE -
-                           FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+                           FIRST_JS_RECEIVER_TYPE));
     __ bgt(is_false);
   }