Enable stub generation using Hydrogen/Lithium (again)

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 79ce9689994f76b463284623f89137d9cfba0560..49e68dbf36151fdcffb319249aa611587ab518d4 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -250,6 +250,11 @@ class LInstruction: public ZoneObject {
 
   void MarkAsCall() { is_call_ = true; }
 
+  // Interface to the register allocator and iterators.
+  bool ClobbersTemps() const { return is_call_; }
+  bool ClobbersRegisters() const { return is_call_; }
+  bool ClobbersDoubleRegisters() const { return is_call_; }
+
   virtual void SetDeferredLazyDeoptimizationEnvironment(LEnvironment* env) { }
 
   // Interface to the register allocator and iterators.
@@ -2245,8 +2250,9 @@ class LOsrEntry: public LTemplateInstruction<0, 0, 0> {
   // slot, i.e., that must also be restored to the spill slot on OSR entry.
   // NULL if the register has no assigned spill slot.  Indexed by allocation
   // index.
-  LOperand* register_spills_[Register::kNumAllocatableRegisters];
-  LOperand* double_register_spills_[DoubleRegister::kNumAllocatableRegisters];
+  LOperand* register_spills_[Register::kMaxNumAllocatableRegisters];
+  LOperand* double_register_spills_[
+      DoubleRegister::kMaxNumAllocatableRegisters];
 };