[compiler] Make SFI "optimize" flag a "tier up" flag

src/builtins/x64/builtins-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/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1106 matching lines @@
   __ cmpl(index, Immediate(1));
   __ j(greater, &loop_top);
 
   // We found neither literals nor code.
   __ jmp(&gotta_call_runtime);
 
   __ bind(&try_shared);
   __ movp(entry, FieldOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   // Is the shared function marked for optimization?
   __ testb(
-      FieldOperand(entry,
-                   SharedFunctionInfo::kWasMarkedForOptimizationByteOffset),
-      Immediate(
-          1 << SharedFunctionInfo::kWasMarkedForOptimizationBitWithinByte));
+      FieldOperand(entry, SharedFunctionInfo::kWasMarkedForTierUpByteOffset),
+      Immediate(1 << SharedFunctionInfo::kWasMarkedForTierUpBitWithinByte));
   __ j(not_zero, &gotta_call_runtime);
   // Is the full code valid?
   __ movp(entry, FieldOperand(entry, SharedFunctionInfo::kCodeOffset));
   __ movl(rbx, FieldOperand(entry, Code::kFlagsOffset));
   __ andl(rbx, Immediate(Code::KindField::kMask));
   __ shrl(rbx, Immediate(Code::KindField::kShift));
   __ cmpl(rbx, Immediate(Code::BUILTIN));
   __ j(equal, &gotta_call_runtime);
   // Yes, install the full code.
   __ leap(entry, FieldOperand(entry, Code::kHeaderSize));
@@ skipping 1939 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64