Hi :
I am studying ira right now, there is following code in change_loop
if (parent_allocno == NULL
|| REGNO (ALLOCNO_REG (parent_allocno)) == REGNO (original_reg))
{
if (internal_flag_ira_verbose > 3 && ira_dump_file)
fprintf (ira_
On 06/09/2010 06:45 AM, Amker.Cheng wrote:
Hi :
I am studying ira right now, there is following code in change_loop
if (parent_allocno == NULL
|| REGNO (ALLOCNO_REG (parent_allocno)) == REGNO (original_reg))
{
if (internal_flag_ira_verbose> 3&&
>
> Yes, I think it can be NULL in some complicated cases when a loop exit edge
> comes not in the parent loop.
By that, you mean the case an regno lives on edges which transfer
between adjacent loops,
and not lives in parent loop?
So, the fprintf would access null pointer in this case.
Thanks for
Amker.Cheng wrote:
Yes, I think it can be NULL in some complicated cases when a loop exit edge
comes not in the parent loop.
By that, you mean the case an regno lives on edges which transfer
between adjacent loops,
and not lives in parent loop?
Yes. But there are even more complicated c
