Improve write barriers in optimized code.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index fc6a5a0d3cc4aa486b43942214651d3b7aa5addb..c57ef468f891e947f2f41080edd7ea23455378de 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -140,7 +140,8 @@ class MacroAssembler: public Assembler {
       Register scratch,
       SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
-      SmiCheck smi_check = INLINE_SMI_CHECK);
+      SmiCheck smi_check = INLINE_SMI_CHECK,
+      bool value_is_in_new_space = false);

[Hannes Payer (out of office), 2014/06/03 05:51:48]

Can we make value_is_in_new_space an enum like SmiCheck e.g.
PointersFromHereAreInterestingCheck?

[Benedikt Meurer, 2014/06/03 07:48:02]

Done.

 
   // As above, but the offset has the tag presubtracted.  For use with
   // Operand(reg, off).
@@ -151,14 +152,16 @@ class MacroAssembler: public Assembler {
       Register scratch,
       SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
-      SmiCheck smi_check = INLINE_SMI_CHECK) {
+      SmiCheck smi_check = INLINE_SMI_CHECK,
+      bool value_is_in_new_space = false) {
     RecordWriteField(context,
                      offset + kHeapObjectTag,
                      value,
                      scratch,
                      save_fp,
                      remembered_set_action,
-                     smi_check);
+                     smi_check,
+                     value_is_in_new_space);
   }
 
   // Notify the garbage collector that we wrote a pointer into a fixed array.
@@ -186,7 +189,8 @@ class MacroAssembler: public Assembler {
       Register value,
       SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
-      SmiCheck smi_check = INLINE_SMI_CHECK);
+      SmiCheck smi_check = INLINE_SMI_CHECK,
+      bool value_is_in_new_space = false);
 
   // For page containing |object| mark the region covering the object's map
   // dirty. |object| is the object being stored into, |map| is the Map object