Put direct code pointers into JSFunction objects. This is a first step...

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
===================================================================
--- src/x64/macro-assembler-x64.cc	(revision 5232)
+++ src/x64/macro-assembler-x64.cc	(working copy)
@@ -582,8 +582,7 @@
     // Make sure the code objects in the builtins object and in the
     // builtin function are the same.
     push(target);
-    movq(target, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
-    movq(target, FieldOperand(target, SharedFunctionInfo::kCodeOffset));
+    movq(target, FieldOperand(rdi, JSFunction::kCodeOffset));
     cmpq(target, Operand(rsp, 0));
     Assert(equal, "Builtin code object changed");
     pop(target);
@@ -2290,7 +2289,7 @@
   movq(rsi, FieldOperand(function, JSFunction::kContextOffset));
   movsxlq(rbx,
           FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
-  movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
+  movq(rdx, FieldOperand(rdi, JSFunction::kCodeOffset));
   // Advances rdx to the end of the Code object header, to the start of
   // the executable code.
   lea(rdx, FieldOperand(rdx, Code::kHeaderSize));