PPC: [runtime] Drop FIRST/LAST_NONCALLABLE_SPEC_OBJECT instance type range.

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 e163af229cc5f5b5d679f3b8d4b58ac02acd4cce..c827b252be0217d0bb0fdbf9ebb5b0ee6955d7ea 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -2610,36 +2610,20 @@ void LCodeGen::EmitClassOfTest(Label* is_true, Label* is_false,
 
   __ 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);
-    __ blt(is_false);
-    __ cmpi(temp2, Operand(LAST_JS_RECEIVER_TYPE));
     __ beq(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.
-    __ LoadP(temp, FieldMemOperand(input, HeapObject::kMapOffset));
-    __ lbz(temp2, FieldMemOperand(temp, Map::kInstanceTypeOffset));
-    __ subi(temp2, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
-    __ cmpi(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE -
-                           FIRST_JS_RECEIVER_TYPE));
-    __ bgt(is_false);
+    __ beq(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'.
   __ cmpi(instance_type, Operand(JS_FUNCTION_TYPE));
-  if (class_name->IsOneByteEqualTo(STATIC_CHAR_VECTOR("Object"))) {
+  if (String::Equals(isolate()->factory()->Object_string(), class_name)) {
     __ bne(is_true);
   } else {
     __ bne(is_false);