Add inline caching for keyed loads and stores. Remove extra parentheses from...

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
===================================================================
--- src/x64/macro-assembler-x64.h	(revision 2533)
+++ src/x64/macro-assembler-x64.h	(working copy)
@@ -175,11 +175,13 @@
   void Call(Handle<Code> code_object, RelocInfo::Mode rmode);
 
   // Compare object type for heap object.
+  // Always use unsigned comparisons: above and below, not less and greater.
   // Incoming register is heap_object and outgoing register is map.
   // They may be the same register, and may be kScratchRegister.
   void CmpObjectType(Register heap_object, InstanceType type, Register map);
 
   // Compare instance type for map.
+  // Always use unsigned comparisons: above and below, not less and greater.
   void CmpInstanceType(Register map, InstanceType type);
 
   // FCmp is similar to integer cmp, but requires unsigned