[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 0f8afbef5823f576b6729e97559172d25fb0a021..f19fe5abdc3e9b4827049198efb9a9ddfc2d2ecb 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1,4 +1,4 @@
-// Copyright 2009 the V8 project authors. All rights reserved.
+// Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -137,12 +137,6 @@ class MacroAssembler: public Assembler {
 #endif
 
   // ---------------------------------------------------------------------------
-  // Stack limit support
-
-  // Do simple test for stack overflow. This doesn't handle an overflow.
-  void StackLimitCheck(Label* on_stack_limit_hit);
-
-  // ---------------------------------------------------------------------------
   // Activation frames
 
   void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); }
@@ -173,6 +167,14 @@ class MacroAssembler: public Assembler {
   // register rax (untouched).
   void LeaveApiExitFrame();
 
+  // Push and pop the registers that can hold pointers.
+  void PushSafepointRegisters() { UNIMPLEMENTED(); }
+  void PopSafepointRegisters() { UNIMPLEMENTED(); }
+  static int SafepointRegisterStackIndex(int reg_code) {
+    UNIMPLEMENTED();
+    return 0;
+  }
+
   // ---------------------------------------------------------------------------
   // JavaScript invokes