VisitForStackValue(expr->expression());
switch (expr->yield_kind()) {
- case Yield::INITIAL:
- case Yield::SUSPEND: {
+ case Yield::SUSPEND:
+ // Pop value from top-of-stack slot; box result into result register.
+ EmitCreateIteratorResult(false);
+ __ push(result_register());
+ // Fall through.
+ case Yield::INITIAL: {
VisitForStackValue(expr->generator_object());
__ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
__ lw(context_register(),
Label resume;
__ LoadRoot(at, Heap::kTheHoleValueRootIndex);
__ Branch(&resume, ne, result_register(), Operand(at));
- if (expr->yield_kind() == Yield::SUSPEND) {
- EmitReturnIteratorResult(false);
- } else {
- __ pop(result_register());
- EmitReturnSequence();
- }
+ __ pop(result_register());
+ EmitReturnSequence();
__ bind(&resume);
context()->Plug(result_register());
__ li(a1, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorClosed)));
__ sw(a1, FieldMemOperand(result_register(),
JSGeneratorObject::kContinuationOffset));
- EmitReturnIteratorResult(true);
+ // Pop value from top-of-stack slot, box result into result register.
+ EmitCreateIteratorResult(true);
+ EmitUnwindBeforeReturn();
+ EmitReturnSequence();
break;
}
// try { received = yield result.value }
__ bind(&l_try);
- __ pop(a0); // result.value
+ EmitCreateIteratorResult(false); // pop and box to v0
__ PushTryHandler(StackHandler::CATCH, expr->index());
const int handler_size = StackHandlerConstants::kSize;
- __ push(a0); // result.value
+ __ push(a0); // result
__ lw(a3, MemOperand(sp, (0 + 1) * kPointerSize + handler_size)); // g
__ push(a3); // g
__ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
MemOperand(fp, StandardFrameConstants::kContextOffset));
__ LoadRoot(at, Heap::kTheHoleValueRootIndex);
__ Branch(&l_resume, ne, a0, Operand(at));
- EmitReturnIteratorResult(false);
+ __ pop(v0); // result
+ EmitReturnSequence();
__ mov(a0, v0);
__ bind(&l_resume); // received in a0
__ PopTryHandler();
}
-void FullCodeGenerator::EmitReturnIteratorResult(bool done) {
+void FullCodeGenerator::EmitCreateIteratorResult(bool done) {
Label gc_required;
Label allocated;
Handle<Map> map(isolate()->native_context()->generator_result_map());
__ Allocate(map->instance_size(), a0, a2, a3, &gc_required, TAG_OBJECT);
+ __ jmp(&allocated);
+
+ __ bind(&gc_required);
+ __ Push(Smi::FromInt(map->instance_size()));
+ __ CallRuntime(Runtime::kAllocateInNewSpace, 1);
+ __ lw(context_register(),
+ MemOperand(fp, StandardFrameConstants::kContextOffset));
__ bind(&allocated);
__ li(a1, Operand(map));
// root set.
__ RecordWriteField(a0, JSGeneratorObject::kResultValuePropertyOffset,
a2, a3, kRAHasBeenSaved, kDontSaveFPRegs);
-
- if (done) {
- // Exit all nested statements.
- NestedStatement* current = nesting_stack_;
- int stack_depth = 0;
- int context_length = 0;
- while (current != NULL) {
- current = current->Exit(&stack_depth, &context_length);
- }
- __ Drop(stack_depth);
- }
-
__ mov(result_register(), a0);
- EmitReturnSequence();
-
- __ bind(&gc_required);
- __ Push(Smi::FromInt(map->instance_size()));
- __ CallRuntime(Runtime::kAllocateInNewSpace, 1);
- __ lw(context_register(),
- MemOperand(fp, StandardFrameConstants::kContextOffset));
- __ jmp(&allocated);
}