- Reordered the instructions in the inlined allocation code to space dependent instructions.

- Replaced the or instruction with lea. 

Review URL: http://codereview.chromium.org/521003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3520 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/macro-assembler-ia32.cc

@@ -729,13 +729,13 @@ void MacroAssembler::AllocateInNewSpace(int object_size,
   cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
   j(above, gc_required, not_taken);
 
-  // Update allocation top.
-  UpdateAllocationTopHelper(result_end, scratch);
-
   // Tag result if requested.
   if ((flags & TAG_OBJECT) != 0) {
-    or_(Operand(result), Immediate(kHeapObjectTag));
+    lea(result, Operand(result, kHeapObjectTag));
   }
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
 }
 
 
@@ -759,13 +759,13 @@ void MacroAssembler::AllocateInNewSpace(int header_size,
   cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
   j(above, gc_required);
 
-  // Update allocation top.
-  UpdateAllocationTopHelper(result_end, scratch);
-
   // Tag result if requested.
   if ((flags & TAG_OBJECT) != 0) {
-    or_(Operand(result), Immediate(kHeapObjectTag));
+    lea(result, Operand(result, kHeapObjectTag));
   }
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
 }
 
 
@@ -790,13 +790,13 @@ void MacroAssembler::AllocateInNewSpace(Register object_size,
   cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
   j(above, gc_required, not_taken);
 
-  // Update allocation top.
-  UpdateAllocationTopHelper(result_end, scratch);
-
   // Tag result if requested.
   if ((flags & TAG_OBJECT) != 0) {
-    or_(Operand(result), Immediate(kHeapObjectTag));
+    lea(result, Operand(result, kHeapObjectTag));
   }
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
 }