[compiler] Mark shared functions for optimization

src/builtins/x64/builtins-x64.cc

Index: src/builtins/x64/builtins-x64.cc
diff --git a/src/builtins/x64/builtins-x64.cc b/src/builtins/x64/builtins-x64.cc
index ed8300598a88fd7dc3210fd0874d13f80738e04c..c412431fa5517300596180e2d4713e78e60206ab 100644
--- a/src/builtins/x64/builtins-x64.cc
+++ b/src/builtins/x64/builtins-x64.cc
@@ -1121,8 +1121,15 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   __ jmp(&gotta_call_runtime);
 
   __ bind(&try_shared);
-  // Is the full code valid?
   __ 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(entry, SharedFunctionInfo::kCodeOffset));
   __ movl(rbx, FieldOperand(entry, Code::kFlagsOffset));
   __ andl(rbx, Immediate(Code::KindField::kMask));