Implement the function.sent proposal.

src/full-codegen/mips64/full-codegen-mips64.cc

Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index 47ad4c5f0f99e5806d8fc0df2c0e35b21acbc461..9f32a88ce72170e75ad5eec05729e81bc38bc84a 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -1974,6 +1974,7 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       Label l_next, l_call;
       Register load_receiver = LoadDescriptor::ReceiverRegister();
       Register load_name = LoadDescriptor::NameRegister();
+
       // Initial send value is undefined.
       __ LoadRoot(a0, Heap::kUndefinedValueRootIndex);
       __ Branch(&l_next);
@@ -2086,6 +2087,13 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
   VisitForAccumulatorValue(value);
   __ pop(a1);
 
+  // Store input value into generator object.
+  __ sd(result_register(),
+        FieldMemOperand(a1, JSGeneratorObject::kInputOffset));
+  __ mov(a2, result_register());
+  __ RecordWriteField(a1, JSGeneratorObject::kInputOffset, a2, a3,
+                      kRAHasBeenSaved, kDontSaveFPRegs);
+
   // Load suspended function and context.
   __ ld(cp, FieldMemOperand(a1, JSGeneratorObject::kContextOffset));
   __ ld(a4, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset));