Write buffer based write barrier for IA32 and Crankshaft. Currently...

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
===================================================================
--- src/ia32/macro-assembler-ia32.h	(revision 6183)
+++ src/ia32/macro-assembler-ia32.h	(working copy)
@@ -61,13 +61,13 @@
   // ---------------------------------------------------------------------------
   // GC Support
 
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   // For page containing |object| mark region covering |addr| dirty.
   // RecordWriteHelper only works if the object is not in new
   // space.
   void RecordWriteHelper(Register object,
                          Register addr,
-                         Register scratch);
+                         Register scratch,
+                         SaveFPRegsMode save_fp);
 
   // Check if object is in new space.
   // scratch can be object itself, but it will be clobbered.
@@ -87,7 +87,8 @@
   void RecordWrite(Register object,
                    int offset,
                    Register value,
-                   Register scratch);
+                   Register scratch,
+                   SaveFPRegsMode save_fp);
 
   // For page containing |object| mark region covering |address|
   // dirty. |object| is the object being stored into, |value| is the
@@ -96,8 +97,8 @@
   // write barrier if the value is a smi.
   void RecordWrite(Register object,
                    Register address,
-                   Register value);
-#endif
+                   Register value,
+                   SaveFPRegsMode save_fp);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // ---------------------------------------------------------------------------
@@ -661,7 +662,6 @@
 };
 
 
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
 template <typename LabelType>
 void MacroAssembler::InNewSpace(Register object,
                                 Register scratch,
@@ -685,7 +685,6 @@
     j(cc, branch);
   }
 }
-#endif
 
 
 // The code patcher is used to patch (typically) small parts of code e.g. for