[builtins] Start refactoring the Apply builtin.

src/ia32/macro-assembler-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/bootstrapper.h"
@@ skipping 803 matching lines @@
 }
 
 
 void MacroAssembler::AssertSmi(Register object) {
   if (emit_debug_code()) {
     test(object, Immediate(kSmiTagMask));
     Check(equal, kOperandIsNotASmi);
   }
 }
 
+void MacroAssembler::AssertFixedArray(Register object) {
+  if (emit_debug_code()) {
+    test(object, Immediate(kSmiTagMask));
+    Check(not_equal, kOperandIsASmiAndNotAFixedArray);
+    Push(object);
+    CmpObjectType(object, FIXED_ARRAY_TYPE, object);
+    Pop(object);
+    Check(equal, kOperandIsNotAFixedArray);
+  }
+}
 
 void MacroAssembler::AssertFunction(Register object) {
   if (emit_debug_code()) {
     test(object, Immediate(kSmiTagMask));
     Check(not_equal, kOperandIsASmiAndNotAFunction);
     Push(object);
     CmpObjectType(object, JS_FUNCTION_TYPE, object);
     Pop(object);
     Check(equal, kOperandIsNotAFunction);
   }
@@ skipping 1944 matching lines @@
   mov(eax, dividend);
   shr(eax, 31);
   add(edx, eax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32