Fix Object.prototype.toString.call(proxy)

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index cdcb31d98ec770d748c36c927566f2857b0bdefd..3de29fc40e0c581d8a84c51e3080673e9c0aef3d 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -2728,14 +2728,11 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
     // 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);

[Camillo Bruni, 2015/12/11 12:37:27]

It would probably make some things easier by having JS_PROXY_TYPE and
JS_FUNCTION_TYPE next to each other ;)

     __ CmpObjectType(input, FIRST_JS_RECEIVER_TYPE, temp);
     __ j(below, is_false);
-    __ j(equal, is_true);
     __ CmpInstanceType(temp, LAST_JS_RECEIVER_TYPE);

[Camillo Bruni, 2015/12/11 12:37:27]

Why don't we compare directly with JS_FUNCTION_TYPE here? If so you have to
change the assert above again... :P, so probably, no :P

     __ j(equal, is_true);
   } else {
@@ -2743,9 +2740,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
     // actual type and do a signed compare with the width of the type range.
     __ mov(temp, FieldOperand(input, HeapObject::kMapOffset));
     __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset));
-    __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+    __ sub(Operand(temp2), Immediate(FIRST_JS_RECEIVER_TYPE));
     __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE -
-                                     FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+                                     FIRST_JS_RECEIVER_TYPE));
     __ j(above, is_false);
   }