Generator object "next" method takes optional send value

src/x64/full-codegen-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 1994 matching lines @@
       break;
     }
 
     case Yield::DELEGATING: {
       VisitForStackValue(expr->generator_object());
 
       // Initial stack layout is as follows:
       // [sp + 1 * kPointerSize] iter
       // [sp + 0 * kPointerSize] g
 
-      Label l_catch, l_try, l_resume, l_send, l_call, l_loop;
+      Label l_catch, l_try, l_resume, l_next, l_call, l_loop;
       // Initial send value is undefined.
       __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-      __ jmp(&l_send);
+      __ jmp(&l_next);
 
       // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
       __ bind(&l_catch);
       handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
       __ movq(rcx, Operand(rsp, 1 * kPointerSize));      // iter
       __ push(rcx);                                      // iter
       __ push(rax);                                      // exception
       __ movq(rax, rcx);                                 // iter
       __ LoadRoot(rcx, Heap::kthrow_stringRootIndex);    // "throw"
       Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(throw_ic);                                  // iter.throw in rax
       __ jmp(&l_call);
 
       // try { received = yield result.value }
       __ bind(&l_try);
       __ pop(rax);                                       // result.value
       __ PushTryHandler(StackHandler::CATCH, expr->index());
       const int handler_size = StackHandlerConstants::kSize;
       __ push(rax);                                      // result.value
       __ push(Operand(rsp, (0 + 1) * kPointerSize + handler_size));  // g
       __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
       __ movq(context_register(),
               Operand(rbp, StandardFrameConstants::kContextOffset));
       __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
       __ j(not_equal, &l_resume);
       EmitReturnIteratorResult(false);
       __ bind(&l_resume);                                // received in rax
       __ PopTryHandler();
 
-      // receiver = iter; f = iter.send; arg = received;
-      __ bind(&l_send);
+      // receiver = iter; f = iter.next; arg = received;
+      __ bind(&l_next);
       __ movq(rcx, Operand(rsp, 1 * kPointerSize));      // iter
       __ push(rcx);                                      // iter
       __ push(rax);                                      // received
       __ movq(rax, rcx);                                 // iter
-      __ LoadRoot(rcx, Heap::ksend_stringRootIndex);     // "send"
-      Handle<Code> send_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(send_ic);                                   // iter.send in rax
+      __ LoadRoot(rcx, Heap::knext_stringRootIndex);     // "next"
+      Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
+      CallIC(next_ic);                                   // iter.next in rax
 
       // result = f.call(receiver, arg);
       __ bind(&l_call);
       Label l_call_runtime;
       __ JumpIfSmi(rax, &l_call_runtime);
       __ CmpObjectType(rax, JS_FUNCTION_TYPE, rbx);
       __ j(not_equal, &l_call_runtime);
       __ movq(rdi, rax);
       ParameterCount count(1);
       __ InvokeFunction(rdi, count, CALL_FUNCTION,
@@ skipping 81 matching lines @@
   __ push(rsi);  // Callee's context.
   __ push(rdi);  // Callee's JS Function.
 
   // Load the operand stack size.
   __ movq(rdx, FieldOperand(rbx, JSGeneratorObject::kOperandStackOffset));
   __ movq(rdx, FieldOperand(rdx, FixedArray::kLengthOffset));
   __ SmiToInteger32(rdx, rdx);
 
   // If we are sending a value and there is no operand stack, we can jump back
   // in directly.
-  if (resume_mode == JSGeneratorObject::SEND) {
+  if (resume_mode == JSGeneratorObject::NEXT) {
     Label slow_resume;
     __ cmpq(rdx, Immediate(0));
     __ j(not_zero, &slow_resume);
     __ movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset));
     __ SmiToInteger64(rcx,
         FieldOperand(rbx, JSGeneratorObject::kContinuationOffset));
     __ addq(rdx, rcx);
     __ Move(FieldOperand(rbx, JSGeneratorObject::kContinuationOffset),
             Smi::FromInt(JSGeneratorObject::kGeneratorExecuting));
     __ jmp(rdx);
@@ skipping 2747 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64