518 return make_default(gvn, vk);
519 }
520 vt->set_oop(not_null_oop);
521 vt->load(kit, not_null_oop, not_null_oop, vk, /* holder_offset */ 0);
522
523 if (null_ctl != kit->top()) {
524 // Return default value type if oop is null
525 ValueTypeNode* def = make_default(gvn, vk);
526 Node* region = new RegionNode(3);
527 region->init_req(1, kit->control());
528 region->init_req(2, null_ctl);
529
530 vt = vt->clone_with_phis(&gvn, region)->as_ValueType();
531 vt->merge_with(&gvn, def, 2, true);
532 kit->set_control(gvn.transform(region));
533 }
534 } else {
535 // Oop can never be null
536 Node* init_ctl = kit->control();
537 vt->load(kit, oop, oop, vk, /* holder_offset */ 0);
538 assert(init_ctl != kit->control() || oop->is_Con() || oop->is_CheckCastPP() || oop->Opcode() == Op_ValueTypePtr ||
539 vt->is_loaded(&gvn) == oop, "value type should be loaded");
540 }
541
542 assert(vt->is_allocated(&gvn), "value type should be allocated");
543 return gvn.transform(vt)->as_ValueType();
544 }
545
546 // GraphKit wrapper for the 'make_from_flattened' method
547 ValueTypeNode* ValueTypeNode::make_from_flattened(GraphKit* kit, ciValueKlass* vk, Node* obj, Node* ptr, ciInstanceKlass* holder, int holder_offset, DecoratorSet decorators) {
548 // Create and initialize a ValueTypeNode by loading all field values from
549 // a flattened value type field at 'holder_offset' or from a value type array.
550 ValueTypeNode* vt = make_uninitialized(kit->gvn(), vk);
551 // The value type is flattened into the object without an oop header. Subtract the
552 // offset of the first field to account for the missing header when loading the values.
553 holder_offset -= vk->first_field_offset();
554 vt->load(kit, obj, ptr, holder, holder_offset, decorators);
555 assert(vt->is_loaded(&kit->gvn()) != obj, "holder oop should not be used as flattened value type oop");
556 return kit->gvn().transform(vt)->as_ValueType();
557 }
558
559 ValueTypeNode* ValueTypeNode::make_from_multi(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, ciValueKlass* vk, uint& base_input, bool in) {
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518 return make_default(gvn, vk);
519 }
520 vt->set_oop(not_null_oop);
521 vt->load(kit, not_null_oop, not_null_oop, vk, /* holder_offset */ 0);
522
523 if (null_ctl != kit->top()) {
524 // Return default value type if oop is null
525 ValueTypeNode* def = make_default(gvn, vk);
526 Node* region = new RegionNode(3);
527 region->init_req(1, kit->control());
528 region->init_req(2, null_ctl);
529
530 vt = vt->clone_with_phis(&gvn, region)->as_ValueType();
531 vt->merge_with(&gvn, def, 2, true);
532 kit->set_control(gvn.transform(region));
533 }
534 } else {
535 // Oop can never be null
536 Node* init_ctl = kit->control();
537 vt->load(kit, oop, oop, vk, /* holder_offset */ 0);
538 assert(init_ctl != kit->control() || !gvn.type(oop)->is_valuetypeptr() || oop->is_Con() || oop->Opcode() == Op_ValueTypePtr ||
539 AllocateNode::Ideal_allocation(oop, &gvn) != NULL || vt->is_loaded(&gvn) == oop, "value type should be loaded");
540 }
541
542 assert(vt->is_allocated(&gvn), "value type should be allocated");
543 return gvn.transform(vt)->as_ValueType();
544 }
545
546 // GraphKit wrapper for the 'make_from_flattened' method
547 ValueTypeNode* ValueTypeNode::make_from_flattened(GraphKit* kit, ciValueKlass* vk, Node* obj, Node* ptr, ciInstanceKlass* holder, int holder_offset, DecoratorSet decorators) {
548 // Create and initialize a ValueTypeNode by loading all field values from
549 // a flattened value type field at 'holder_offset' or from a value type array.
550 ValueTypeNode* vt = make_uninitialized(kit->gvn(), vk);
551 // The value type is flattened into the object without an oop header. Subtract the
552 // offset of the first field to account for the missing header when loading the values.
553 holder_offset -= vk->first_field_offset();
554 vt->load(kit, obj, ptr, holder, holder_offset, decorators);
555 assert(vt->is_loaded(&kit->gvn()) != obj, "holder oop should not be used as flattened value type oop");
556 return kit->gvn().transform(vt)->as_ValueType();
557 }
558
559 ValueTypeNode* ValueTypeNode::make_from_multi(GraphKit* kit, MultiNode* multi, ExtendedSignature& sig, ciValueKlass* vk, uint& base_input, bool in) {
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