Move ToInt conversions to the MacroAssembler for x64

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 65c6dcae1f9793c6e668c03bc894a1115e2e3f56..b840310d0c8816f73b5c9e7974d5959d95cb9a85 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -123,7 +123,7 @@ class LCodeGen V8_FINAL BASE_EMBEDDED {
   // Deferred code support.
   void DoDeferredNumberTagD(LNumberTagD* instr);
   void DoDeferredNumberTagU(LNumberTagU* instr);
-  void DoDeferredTaggedToI(LTaggedToI* instr);
+  void DoDeferredTaggedToI(LTaggedToI* instr, Label* done);
   void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr);
   void DoDeferredStackCheck(LStackCheck* instr);
   void DoDeferredRandom(LRandom* instr);
@@ -427,6 +427,7 @@ class LDeferredCode: public ZoneObject {
   void SetExit(Label* exit) { external_exit_ = exit; }
   Label* entry() { return &entry_; }
   Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; }
+  Label* done() { return codegen_->NeedsDeferredFrame() ? &done_ : exit(); }
   int instruction_index() const { return instruction_index_; }
 
  protected:
@@ -437,6 +438,7 @@ class LDeferredCode: public ZoneObject {
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
+  Label done_;
   Label* external_exit_;
   int instruction_index_;
 };