[runtime] Drop FIRST/LAST_NONCALLABLE_SPEC_OBJECT instance type range.

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

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index b2d57954093f5bfbee6f364d94d7fcafa77a6725..794085e99540cc47732972acfaa440920583d6a9 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -2538,36 +2538,20 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   __ JumpIfSmi(input, is_false);
 
+  __ CompareObjectType(input, temp, temp2, JS_FUNCTION_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    // 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(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);
-    __ b(lt, is_false);
-    __ cmp(temp2, Operand(LAST_JS_RECEIVER_TYPE));
     __ b(eq, is_true);
   } else {
-    // Faster code path to avoid two compares: subtract lower bound from the
-    // actual type and do a signed compare with the width of the type range.
-    __ ldr(temp, FieldMemOperand(input, HeapObject::kMapOffset));
-    __ ldrb(temp2, FieldMemOperand(temp, Map::kInstanceTypeOffset));
-    __ sub(temp2, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
-    __ cmp(temp2,
-           Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - FIRST_JS_RECEIVER_TYPE));
-    __ b(gt, is_false);
+    __ b(eq, is_false);
   }
 
-  // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.
   // Check if the constructor in the map is a function.
   Register instance_type = ip;
   __ GetMapConstructor(temp, temp, temp2, instance_type);
 
   // Objects with a non-function constructor have class 'Object'.
   __ cmp(instance_type, Operand(JS_FUNCTION_TYPE));
-  if (class_name->IsOneByteEqualTo(STATIC_CHAR_VECTOR("Object"))) {
+  if (String::Equals(isolate()->factory()->Object_string(), class_name)) {
     __ b(ne, is_true);
   } else {
     __ b(ne, is_false);