Revert r18131 and r18139 "Clean up in the CallStubCompiler".

src/x64/macro-assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3583 matching lines @@
           FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
   // Advances rdx to the end of the Code object header, to the start of
   // the executable code.
   movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset));
 
   ParameterCount expected(rbx);
   InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind);
 }
 
 
-void MacroAssembler::InvokeFunction(Register function,
+void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
                                     const ParameterCount& expected,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper,
                                     CallKind call_kind) {
   // You can't call a function without a valid frame.
   ASSERT(flag == JUMP_FUNCTION || has_frame());
 
-  ASSERT(function.is(rdi));
-  movq(rsi, FieldOperand(function, JSFunction::kContextOffset));
-  // Advances rdx to the end of the Code object header, to the start of
-  // the executable code.
+  // Get the function and setup the context.
+  Move(rdi, function);
+  movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset));
+
+  // We call indirectly through the code field in the function to
+  // allow recompilation to take effect without changing any of the
+  // call sites.
   movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset));
-
   InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind);
 }
 
 
-void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
-                                    const ParameterCount& expected,
-                                    const ParameterCount& actual,
-                                    InvokeFlag flag,
-                                    const CallWrapper& call_wrapper,
-                                    CallKind call_kind) {
-  Move(rdi, function);
-  InvokeFunction(rdi, expected, actual, flag, call_wrapper, call_kind);
-}
-
-
 void MacroAssembler::InvokePrologue(const ParameterCount& expected,
                                     const ParameterCount& actual,
                                     Handle<Code> code_constant,
                                     Register code_register,
                                     Label* done,
                                     bool* definitely_mismatches,
                                     InvokeFlag flag,
                                     Label::Distance near_jump,
                                     const CallWrapper& call_wrapper,
                                     CallKind call_kind) {
@@ skipping 1420 matching lines @@
   j(equal, found);
   movq(current, FieldOperand(current, Map::kPrototypeOffset));
   CompareRoot(current, Heap::kNullValueRootIndex);
   j(not_equal, &loop_again);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64