Merge 6006:6095 from bleeding_edge to experimental/gc branch.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
===================================================================
--- src/arm/macro-assembler-arm.h	(revision 6095)
+++ src/arm/macro-assembler-arm.h	(working copy)
@@ -96,6 +96,7 @@
   // from the stack, clobbering only the sp register.
   void Drop(int count, Condition cond = al);
 
+  void Ret(int drop, Condition cond = al);
 
   // Swap two registers.  If the scratch register is omitted then a slightly
   // less efficient form using xor instead of mov is emitted.
@@ -299,7 +300,19 @@
                       const ParameterCount& actual,
                       InvokeFlag flag);
 
+  void IsObjectJSObjectType(Register heap_object,
+                            Register map,
+                            Register scratch,
+                            Label* fail);
 
+  void IsInstanceJSObjectType(Register map,
+                              Register scratch,
+                              Label* fail);
+
+  void IsObjectJSStringType(Register object,
+                            Register scratch,
+                            Label* fail);
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // ---------------------------------------------------------------------------
   // Debugger Support