Make x64 to use the RecordWrite stub. This is a step towards getting

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
===================================================================
--- src/x64/lithium-codegen-x64.cc	(revision 8207)
+++ src/x64/lithium-codegen-x64.cc	(working copy)
@@ -216,11 +216,8 @@
         // Store it in the context.
         int context_offset = Context::SlotOffset(slot->index());
         __ movq(Operand(rsi, context_offset), rax);
-        // Update the write barrier. This clobbers all involved
-        // registers, so we have use a third register to avoid
-        // clobbering rsi.
-        __ movq(rcx, rsi);
-        __ RecordWrite(rcx, context_offset, rax, rbx, kSaveFPRegs);
+        // Update the write barrier. This clobbers rax and rbx.
+        __ RecordWriteContextSlot(rsi, context_offset, rax, rbx, kSaveFPRegs);
       }
     }
     Comment(";;; End allocate local context");
@@ -2266,7 +2263,7 @@
   if (instr->needs_write_barrier()) {
     int offset = Context::SlotOffset(instr->slot_index());
     Register scratch = ToRegister(instr->TempAt(0));
-    __ RecordWrite(context, offset, value, scratch, kSaveFPRegs);
+    __ RecordWriteContextSlot(context, offset, value, scratch, kSaveFPRegs);
   }
 }
 
@@ -3165,7 +3162,7 @@
     if (instr->needs_write_barrier()) {
       Register temp = ToRegister(instr->TempAt(0));
       // Update the write barrier for the object for in-object properties.
-      __ RecordWrite(object, offset, value, temp, kSaveFPRegs);
+      __ RecordWriteField(object, offset, value, temp, kSaveFPRegs);
     }
   } else {
     Register temp = ToRegister(instr->TempAt(0));
@@ -3174,7 +3171,7 @@
     if (instr->needs_write_barrier()) {
       // Update the write barrier for the properties array.
       // object is used as a scratch register.
-      __ RecordWrite(temp, offset, value, object, kSaveFPRegs);
+      __ RecordWriteField(temp, offset, value, object, kSaveFPRegs);
     }
   }
 }