Use near labels in write barrier 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 8407802104dee42e20b9f284caa1856f1fa302d9..6f5fa87297191df91f483cb736d4baf598918308 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -70,10 +70,11 @@ class MacroAssembler: public Assembler {
 
   // Check if object is in new space.
   // scratch can be object itself, but it will be clobbered.
+  template <typename LabelType>
   void InNewSpace(Register object,
                   Register scratch,
                   Condition cc,  // equal for new space, not_equal otherwise.
-                  Label* branch);
+                  LabelType* branch);
 
   // For page containing |object| mark region covering [object+offset]
   // dirty. |object| is the object being stored into, |value| is the
@@ -658,6 +659,31 @@ class MacroAssembler: public Assembler {
 };
 
 
+template <typename LabelType>
+void MacroAssembler::InNewSpace(Register object,
+                                Register scratch,
+                                Condition cc,
+                                LabelType* branch) {
+  ASSERT(cc == equal || cc == not_equal);
+  if (Serializer::enabled()) {
+    // Can't do arithmetic on external references if it might get serialized.
+    mov(scratch, Operand(object));
+    // The mask isn't really an address.  We load it as an external reference in
+    // case the size of the new space is different between the snapshot maker
+    // and the running system.
+    and_(Operand(scratch), Immediate(ExternalReference::new_space_mask()));
+    cmp(Operand(scratch), Immediate(ExternalReference::new_space_start()));
+    j(cc, branch);
+  } else {
+    int32_t new_space_start = reinterpret_cast<int32_t>(
+        ExternalReference::new_space_start().address());
+    lea(scratch, Operand(object, -new_space_start));
+    and_(scratch, Heap::NewSpaceMask());
+    j(cc, branch);
+  }
+}
+
+
 // The code patcher is used to patch (typically) small parts of code e.g. for
 // debugging and other types of instrumentation. When using the code patcher
 // the exact number of bytes specified must be emitted. Is not legal to emit