Capture receiver in generator object

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 1965 matching lines @@
   STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting <= 0);
   STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed <= 0);
   __ SmiCompare(FieldOperand(rbx, JSGeneratorObject::kContinuationOffset),
                 Smi::FromInt(0));
   __ j(less_equal, &wrong_state);
 
   // Load suspended function and context.
   __ movq(rsi, FieldOperand(rbx, JSGeneratorObject::kContextOffset));
   __ movq(rdi, FieldOperand(rbx, JSGeneratorObject::kFunctionOffset));
 
+  // Push receiver.
+  __ push(FieldOperand(rbx, JSGeneratorObject::kReceiverOffset));
+
   // Push holes for arguments to generator function.
   __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
   __ movsxlq(rdx,
              FieldOperand(rdx,
                           SharedFunctionInfo::kFormalParameterCountOffset));
   __ LoadRoot(rcx, Heap::kTheHoleValueRootIndex);
-  Label push_argument_holes;
+  Label push_argument_holes, push_frame;
   __ bind(&push_argument_holes);
+  __ subq(rdx, Immediate(1));
+  __ j(carry, &push_frame);
   __ push(rcx);
-  __ subq(rdx, Immediate(1));
-  __ j(not_carry, &push_argument_holes);
+  __ jmp(&push_argument_holes);
 
   // Enter a new JavaScript frame, and initialize its slots as they were when
   // the generator was suspended.
-  Label push_frame, resume_frame;
+  Label resume_frame;
   __ bind(&push_frame);
   __ call(&resume_frame);
   __ jmp(&done);
   __ bind(&resume_frame);
   __ push(rbp);  // Caller's frame pointer.
   __ movq(rbp, rsp);
   __ push(rsi);  // Callee's context.
   __ push(rdi);  // Callee's JS Function.
 
   // Load the operand stack size.
@@ skipping 2668 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64