Merge up to 8597 to experimental/gc from the bleeding edge.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
===================================================================
--- src/x64/macro-assembler-x64.h	(revision 8618)
+++ src/x64/macro-assembler-x64.h	(working copy)
@@ -333,29 +333,30 @@
                   const ParameterCount& expected,
                   const ParameterCount& actual,
                   InvokeFlag flag,
-                  const CallWrapper& call_wrapper = NullCallWrapper(),
-                  CallKind call_kind = CALL_AS_METHOD);
+                  const CallWrapper& call_wrapper,
+                  CallKind call_kind);
 
   void InvokeCode(Handle<Code> code,
                   const ParameterCount& expected,
                   const ParameterCount& actual,
                   RelocInfo::Mode rmode,
                   InvokeFlag flag,
-                  const CallWrapper& call_wrapper = NullCallWrapper(),
-                  CallKind call_kind = CALL_AS_METHOD);
+                  const CallWrapper& call_wrapper,
+                  CallKind call_kind);
 
   // Invoke the JavaScript function in the given register. Changes the
   // current context to the context in the function before invoking.
   void InvokeFunction(Register function,
                       const ParameterCount& actual,
                       InvokeFlag flag,
-                      const CallWrapper& call_wrapper = NullCallWrapper(),
-                      CallKind call_kind = CALL_AS_METHOD);
+                      const CallWrapper& call_wrapper,
+                      CallKind call_kind);
 
   void InvokeFunction(JSFunction* function,
                       const ParameterCount& actual,
                       InvokeFlag flag,
-                      const CallWrapper& call_wrapper = NullCallWrapper());
+                      const CallWrapper& call_wrapper,
+                      CallKind call_kind);
 
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
@@ -835,6 +836,12 @@
   // Always use unsigned comparisons: above and below, not less and greater.
   void CmpInstanceType(Register map, InstanceType type);
 
+  // Check if a map for a JSObject indicates that the object has fast elements.
+  // Jump to the specified label if it does not.
+  void CheckFastElements(Register map,
+                         Label* fail,
+                         Label::Distance distance = Label::kFar);
+
   // Check if the map of an object is equal to a specified map and
   // branch to label if not. Skip the smi check if not required
   // (object is known to be a heap object)
@@ -921,6 +928,15 @@
                               Label* miss);
 
 
+  void LoadFromNumberDictionary(Label* miss,
+                                Register elements,
+                                Register key,
+                                Register r0,
+                                Register r1,
+                                Register r2,
+                                Register result);
+
+
   // ---------------------------------------------------------------------------
   // Allocation support