[TypeFeedbackVector] Root feedback vectors at function literal site.

src/x64/macro-assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 4373 matching lines @@
     movp(rbp, rsp);
     Push(rsi);  // Callee's context.
     Push(rdi);  // Callee's JS function.
   }
 }
 
 
 void MacroAssembler::EmitLoadTypeFeedbackVector(Register vector) {
   movp(vector, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
   movp(vector, FieldOperand(vector, JSFunction::kFeedbackVectorOffset));
+  movp(vector, FieldOperand(vector, Cell::kValueOffset));
 }
 
 
 void MacroAssembler::EnterFrame(StackFrame::Type type,
                                 bool load_constant_pool_pointer_reg) {
   // Out-of-line constant pool not implemented on x64.
   UNREACHABLE();
 }
 
 
@@ skipping 903 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64