[generators] Store the resume mode in the generator object.

src/mips64/builtins-mips64.cc

Index: src/mips64/builtins-mips64.cc
diff --git a/src/mips64/builtins-mips64.cc b/src/mips64/builtins-mips64.cc
index b086780ae36cd42488da953633efc232e18c29ba..6049c430c0b1cf941e71efca7f3b45d227edfbd7 100644
--- a/src/mips64/builtins-mips64.cc
+++ b/src/mips64/builtins-mips64.cc
@@ -705,6 +705,9 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
   __ RecordWriteField(a1, JSGeneratorObject::kInputOffset, v0, a3,
                       kRAHasNotBeenSaved, kDontSaveFPRegs);
 
+  // Store resume mode into generator object.
+  __ sd(a2, FieldMemOperand(a1, JSGeneratorObject::kResumeModeOffset));
+
   // Load suspended function and context.
   __ ld(cp, FieldMemOperand(a1, JSGeneratorObject::kContextOffset));
   __ ld(a4, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset));
@@ -779,16 +782,10 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
     __ bind(&done_loop);
   }
 
-  // Push resume mode (consumed in continuation).
-  __ Push(a2);
-
   // Reset operand stack so we don't leak.
   __ LoadRoot(a5, Heap::kEmptyFixedArrayRootIndex);
   __ sd(a5, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset));
 
-  // Restore value.
-  __ ld(v0, FieldMemOperand(a1, JSGeneratorObject::kInputOffset));
-
   // Resume the generator function at the continuation.
   __ ld(a3, FieldMemOperand(a4, JSFunction::kSharedFunctionInfoOffset));
   __ ld(a3, FieldMemOperand(a3, SharedFunctionInfo::kCodeOffset));
@@ -798,6 +795,7 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
   __ Daddu(a3, a3, Operand(a2));
   __ li(a2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)));
   __ sd(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset));
+  __ Move(v0, a1);  // Continuation expects generator object in v0.
   __ Jump(a3);
 }