Implement the function.sent proposal.

src/full-codegen/x87/full-codegen-x87.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_X87
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1973 matching lines @@
     Expression *value,
     JSGeneratorObject::ResumeMode resume_mode) {
   // The value stays in eax, and is ultimately read by the resumed generator, as
   // if CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. Or it
   // is read to throw the value when the resumed generator is already closed.
   // ebx will hold the generator object until the activation has been resumed.
   VisitForStackValue(generator);
   VisitForAccumulatorValue(value);
   __ pop(ebx);
 
+  // Store input value into generator object.
+  __ mov(FieldOperand(ebx, JSGeneratorObject::kInputOffset), result_register());
+  __ mov(edx, result_register());
+  __ RecordWriteField(ebx, JSGeneratorObject::kInputOffset, edx, ecx,
+                      kDontSaveFPRegs);
+
   // Load suspended function and context.
   __ mov(esi, FieldOperand(ebx, JSGeneratorObject::kContextOffset));
   __ mov(edi, FieldOperand(ebx, JSGeneratorObject::kFunctionOffset));
 
   // Push receiver.
   __ push(FieldOperand(ebx, JSGeneratorObject::kReceiverOffset));
 
   // Push holes for arguments to generator function.
   __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
   __ mov(edx,
@@ skipping 2704 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87