Land Kevin's patch for supporting %_CallFunction in Crankshaft.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
===================================================================
--- src/x64/lithium-x64.h	(revision 7622)
+++ src/x64/lithium-x64.h	(working copy)
@@ -98,14 +98,15 @@
   V(GlobalObject)                               \
   V(GlobalReceiver)                             \
   V(Goto)                                       \
+  V(HasCachedArrayIndex)                        \
+  V(HasCachedArrayIndexAndBranch)               \
   V(HasInstanceType)                            \
   V(HasInstanceTypeAndBranch)                   \
-  V(HasCachedArrayIndex)                        \
-  V(HasCachedArrayIndexAndBranch)               \
   V(InstanceOf)                                 \
   V(InstanceOfAndBranch)                        \
   V(InstanceOfKnownGlobal)                      \
   V(Integer32ToDouble)                          \
+  V(InvokeFunction)                             \
   V(IsNull)                                     \
   V(IsNullAndBranch)                            \
   V(IsObject)                                   \
@@ -1394,6 +1395,23 @@
 };
 
 
+class LInvokeFunction: public LTemplateInstruction<1, 1, 0> {
+ public:
+  LInvokeFunction(LOperand* function) {
+    inputs_[0] = function;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
+  DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
+
+  LOperand* function() { return inputs_[0]; }
+
+  virtual void PrintDataTo(StringStream* stream);
+
+  int arity() const { return hydrogen()->argument_count() - 1; }
+};
+
+
 class LCallKeyed: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LCallKeyed(LOperand* key) {