623 uint CallNode::match_edge(uint idx) const { |
623 uint CallNode::match_edge(uint idx) const { |
624 return 0; |
624 return 0; |
625 } |
625 } |
626 |
626 |
627 // |
627 // |
628 // Determine whether the call could modify a memory value of the |
628 // Determine whether the call could modify the field of the specified |
629 // specified address type |
629 // instance at the specified offset. |
630 // |
630 // |
631 bool CallNode::may_modify(const TypePtr *addr_t, PhaseTransform *phase) { |
631 bool CallNode::may_modify(const TypePtr *addr_t, PhaseTransform *phase) { |
632 const TypeOopPtr *adrInst_t = addr_t->isa_oopptr(); |
632 const TypeOopPtr *adrInst_t = addr_t->isa_oopptr(); |
633 |
633 |
634 // if not an InstPtr or not an instance type, assume the worst |
634 // if not an InstPtr or not an instance type, assume the worst |
636 return true; |
636 return true; |
637 } |
637 } |
638 Compile *C = phase->C; |
638 Compile *C = phase->C; |
639 int offset = adrInst_t->offset(); |
639 int offset = adrInst_t->offset(); |
640 assert(offset >= 0, "should be valid offset"); |
640 assert(offset >= 0, "should be valid offset"); |
641 assert(addr_t->isa_instptr() || addr_t->isa_aryptr(), "only instances or arrays are expected"); |
641 ciKlass* adr_k = adrInst_t->klass(); |
|
642 assert(adr_k->is_loaded() && |
|
643 adr_k->is_java_klass() && |
|
644 !adr_k->is_interface(), |
|
645 "only non-abstract classes are expected"); |
642 |
646 |
643 int base_idx = C->get_alias_index(adrInst_t); |
647 int base_idx = C->get_alias_index(adrInst_t); |
|
648 int size = BytesPerLong; // If we don't know the size, assume largest. |
|
649 if (adrInst_t->isa_instptr()) { |
|
650 ciField* field = C->alias_type(base_idx)->field(); |
|
651 if (field != NULL) { |
|
652 size = field->size_in_bytes(); |
|
653 } |
|
654 } else { |
|
655 assert(adrInst_t->isa_aryptr(), "only arrays are expected"); |
|
656 size = type2aelembytes(adr_k->as_array_klass()->element_type()->basic_type()); |
|
657 } |
|
658 |
644 ciMethod * meth = is_CallStaticJava() ? as_CallStaticJava()->method() : NULL; |
659 ciMethod * meth = is_CallStaticJava() ? as_CallStaticJava()->method() : NULL; |
645 BCEscapeAnalyzer *bcea = (meth != NULL) ? meth->get_bcea() : NULL; |
660 BCEscapeAnalyzer *bcea = (meth != NULL) ? meth->get_bcea() : NULL; |
646 |
661 |
647 const TypeTuple * d = tf()->domain(); |
662 const TypeTuple * d = tf()->domain(); |
648 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
663 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
654 |
669 |
655 const TypeOopPtr *at_ptr = at->isa_oopptr(); |
670 const TypeOopPtr *at_ptr = at->isa_oopptr(); |
656 if (!arg->is_top() && (t->isa_oopptr() != NULL || |
671 if (!arg->is_top() && (t->isa_oopptr() != NULL || |
657 t->isa_ptr() && at_ptr != NULL)) { |
672 t->isa_ptr() && at_ptr != NULL)) { |
658 assert(at_ptr != NULL, "expecting an OopPtr"); |
673 assert(at_ptr != NULL, "expecting an OopPtr"); |
659 // If we have found an argument matching adr_base_t, check if the field |
674 ciKlass* at_k = at_ptr->klass(); |
660 // at the specified offset is modified. Since we don't know the size, |
675 if ((adrInst_t->base() == at_ptr->base()) && |
661 // assume 8. |
676 at_k->is_loaded() && |
662 int at_idx = C->get_alias_index(at_ptr->add_offset(offset)->isa_oopptr()); |
677 at_k->is_java_klass() && |
663 if (base_idx == at_idx && |
678 !at_k->is_interface()) { |
664 (bcea == NULL || |
679 // If we have found an argument matching addr_t, check if the field |
665 bcea->is_arg_modified(i - TypeFunc::Parms, offset, 8))) { |
680 // at the specified offset is modified. |
666 return true; |
681 int at_idx = C->get_alias_index(at_ptr->add_offset(offset)->isa_oopptr()); |
|
682 if (base_idx == at_idx && |
|
683 (bcea == NULL || |
|
684 bcea->is_arg_modified(i - TypeFunc::Parms, offset, size))) { |
|
685 return true; |
|
686 } |
667 } |
687 } |
668 } |
688 } |
669 } |
689 } |
670 return false; |
690 return false; |
671 } |
691 } |