2538 change_stack (rtx_insn *insn, stack_ptr old, stack_ptr new_stack,  in change_stack()  argument
2553       BLOCK_INFO (current_block)->stack_in = *new_stack;  in change_stack()
2555       *old = *new_stack;  in change_stack()
2571     if (TEST_HARD_REG_BIT (new_stack->reg_set, i)  in change_stack()
2585   if (new_stack->top > 0)  in change_stack()
2592       for (reg = 0; reg <= new_stack->top; reg++)  in change_stack()
2593 	slots[reg] = TEST_HARD_REG_BIT (new_stack->reg_set, old->reg[reg]);  in change_stack()
2597       for (reg = old->top; reg > new_stack->top; reg--)  in change_stack()
2598 	if (TEST_HARD_REG_BIT (new_stack->reg_set, old->reg[reg]))  in change_stack()
2601 	    for (next = 0; next <= new_stack->top; next++)  in change_stack()
2602 	      if (!slots[next] && new_stack->reg[next] == old->reg[reg])  in change_stack()
2606                   if (next == new_stack->top)  in change_stack()
2623 	for (reg = 0; reg < new_stack->top; reg++)  in change_stack()
2627 	      slots[new_stack->top] = false;  in change_stack()
2633       next = new_stack->top;  in change_stack()
2634       for (reg = old->top; reg > new_stack->top; reg--)  in change_stack()
2657         if (TEST_HARD_REG_BIT (new_stack->reg_set, old->reg[reg]))  in change_stack()
2662         if (TEST_HARD_REG_BIT (new_stack->reg_set, old->reg[old->top]))  in change_stack()
2664 	    while (TEST_HARD_REG_BIT (new_stack->reg_set, old->reg[next]))  in change_stack()
2674   if (new_stack->top == -2)  in change_stack()
2679       new_stack->top = old->top;  in change_stack()
2680       memcpy (new_stack->reg, old->reg, sizeof (new_stack->reg));  in change_stack()
2690       gcc_assert (old->reg_set == new_stack->reg_set);  in change_stack()
2691       gcc_assert (old->top == new_stack->top);  in change_stack()
2702       if (new_stack->top != -1)  in change_stack()
2708 	    while (old->reg[old->top] != new_stack->reg[new_stack->top])  in change_stack()
2710 		for (reg = new_stack->top; reg >= 0; reg--)  in change_stack()
2711 		  if (new_stack->reg[reg] == old->reg[old->top])  in change_stack()
2724 	    for (reg = new_stack->top; reg >= 0; reg--)  in change_stack()
2725 	      if (new_stack->reg[reg] != old->reg[reg])  in change_stack()
2736 	gcc_assert (old->reg[reg] == new_stack->reg[reg]);  in change_stack()