Turn {mov,add}q into {mov,add}l.

All the cases fixed are safe as registers hold 32-bit value, but that looks
safer to operate on proper sizes.

Review URL: http://codereview.chromium.org/2017002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4610 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/codegen-x64.cc

@@ -4447,7 +4447,7 @@ void CodeGenerator::GenerateRegExpConstructResult(ZoneList<Expression*>* args) {
     __ Move(FieldOperand(rcx, HeapObject::kMapOffset),
             Factory::fixed_array_map());
     // Set length.
-    __ movq(FieldOperand(rcx, FixedArray::kLengthOffset), rbx);
+    __ movl(FieldOperand(rcx, FixedArray::kLengthOffset), rbx);
     // Fill contents of fixed-array with the-hole.
     __ Move(rdx, Factory::the_hole_value());
     __ lea(rcx, FieldOperand(rcx, FixedArray::kHeaderSize));
@@ -9010,7 +9010,7 @@ void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) {
   __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi);
   __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex);
   __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister);
-  __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx);
+  __ movl(FieldOperand(rdi, FixedArray::kLengthOffset), rcx);
 
   // Copy the fixed array slots.
   Label loop;

src/x64/stub-cache-x64.cc

@@ -1194,7 +1194,7 @@ Object* CallStubCompiler::CompileArrayPushCall(Object* object,
       __ movq(rdx, Operand(rsp, (argc + 1) * kPointerSize));
 
       // Increment element's and array's sizes.
-      __ addq(FieldOperand(rbx, FixedArray::kLengthOffset),
+      __ addl(FieldOperand(rbx, FixedArray::kLengthOffset),
               Immediate(kAllocationDelta));
       __ movq(FieldOperand(rdx, JSArray::kLengthOffset), rax);