750 } else {
751 safepoints.append_if_missing(sfpt);
752 }
753 } else if (use->Opcode() != Op_CastP2X) { // CastP2X is used by card mark
754 if (use->is_Phi()) {
755 if (use->outcnt() == 1 && use->unique_out()->Opcode() == Op_Return) {
756 NOT_PRODUCT(fail_eliminate = "Object is return value";)
757 } else {
758 NOT_PRODUCT(fail_eliminate = "Object is referenced by Phi";)
759 }
760 DEBUG_ONLY(disq_node = use;)
761 } else {
762 if (use->Opcode() == Op_Return) {
763 NOT_PRODUCT(fail_eliminate = "Object is return value";)
764 }else {
765 NOT_PRODUCT(fail_eliminate = "Object is referenced by node";)
766 }
767 DEBUG_ONLY(disq_node = use;)
768 }
769 can_eliminate = false;
770 }
771 }
772 }
773
774 #ifndef PRODUCT
775 if (PrintEliminateAllocations) {
776 if (can_eliminate) {
777 tty->print("Scalar ");
778 if (res == NULL)
779 alloc->dump();
780 else
781 res->dump();
782 } else if (alloc->_is_scalar_replaceable) {
783 tty->print("NotScalar (%s)", fail_eliminate);
784 if (res == NULL)
785 alloc->dump();
786 else
787 res->dump();
788 #ifdef ASSERT
789 if (disq_node != NULL) {
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750 } else {
751 safepoints.append_if_missing(sfpt);
752 }
753 } else if (use->Opcode() != Op_CastP2X) { // CastP2X is used by card mark
754 if (use->is_Phi()) {
755 if (use->outcnt() == 1 && use->unique_out()->Opcode() == Op_Return) {
756 NOT_PRODUCT(fail_eliminate = "Object is return value";)
757 } else {
758 NOT_PRODUCT(fail_eliminate = "Object is referenced by Phi";)
759 }
760 DEBUG_ONLY(disq_node = use;)
761 } else {
762 if (use->Opcode() == Op_Return) {
763 NOT_PRODUCT(fail_eliminate = "Object is return value";)
764 }else {
765 NOT_PRODUCT(fail_eliminate = "Object is referenced by node";)
766 }
767 DEBUG_ONLY(disq_node = use;)
768 }
769 can_eliminate = false;
770 } else {
771 assert(use->Opcode() == Op_CastP2X, "should be");
772 assert(!use->has_out_with(Op_OrL), "should have been removed because oop is never null");
773 }
774 }
775 }
776
777 #ifndef PRODUCT
778 if (PrintEliminateAllocations) {
779 if (can_eliminate) {
780 tty->print("Scalar ");
781 if (res == NULL)
782 alloc->dump();
783 else
784 res->dump();
785 } else if (alloc->_is_scalar_replaceable) {
786 tty->print("NotScalar (%s)", fail_eliminate);
787 if (res == NULL)
788 alloc->dump();
789 else
790 res->dump();
791 #ifdef ASSERT
792 if (disq_node != NULL) {
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