X87: Clean up JSConstructStub.

src/x87/builtins-x87.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 340 matching lines @@
       // ecx: start of next object
       __ mov(eax, factory->fixed_array_map());
       __ mov(Operand(edi, FixedArray::kMapOffset), eax);  // setup the map
       __ SmiTag(edx);
       __ mov(Operand(edi, FixedArray::kLengthOffset), edx);  // and length
 
       // Initialize the fields to undefined.
       // ebx: JSObject
       // edi: FixedArray
       // ecx: start of next object
-      { Label loop, entry;
-        __ mov(edx, factory->undefined_value());
-        __ lea(eax, Operand(edi, FixedArray::kHeaderSize));
-        __ jmp(&entry);
-        __ bind(&loop);
-        __ mov(Operand(eax, 0), edx);
-        __ add(eax, Immediate(kPointerSize));
-        __ bind(&entry);
-        __ cmp(eax, ecx);
-        __ j(below, &loop);
-      }
+      __ mov(edx, factory->undefined_value());
+      __ lea(eax, Operand(edi, FixedArray::kHeaderSize));
+      __ InitializeFieldsWithFiller(eax, ecx, edx);
 
       // Store the initialized FixedArray into the properties field of
       // the JSObject
       // ebx: JSObject
       // edi: FixedArray
       __ or_(edi, Immediate(kHeapObjectTag));  // add the heap tag
       __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi);
 
 
       // Continue with JSObject being successfully allocated
@@ skipping 1334 matching lines @@
 
   __ bind(&ok);
   __ ret(0);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87