[compiler] Mark shared functions for optimization

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 1103 matching lines @@
 
   __ bind(&loop_bottom);
   __ subl(index, Immediate(SharedFunctionInfo::kEntryLength));
   __ 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));
+  __ j(not_zero, &gotta_call_runtime);
   // Is the full code valid?
-  __ movp(entry, FieldOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   __ 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));
   __ movp(FieldOperand(closure, JSFunction::kCodeEntryOffset), entry);
   __ RecordWriteCodeEntryField(closure, entry, r15);
@@ skipping 1937 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64