Implement the function.sent proposal.

src/full-codegen/x87/full-codegen-x87.cc

Index: src/full-codegen/x87/full-codegen-x87.cc
diff --git a/src/full-codegen/x87/full-codegen-x87.cc b/src/full-codegen/x87/full-codegen-x87.cc
index 526f3c6096e5d1bf64098f4c756419157ba984bf..93e9a9977e47e51970cc40e8a7b555e84bb2b197 100644
--- a/src/full-codegen/x87/full-codegen-x87.cc
+++ b/src/full-codegen/x87/full-codegen-x87.cc
@@ -1991,6 +1991,12 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *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));