This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Issue with delay slot scheduling?
On 6 September 2011 20:50, Jeff Law <law@redhat.com> wrote:
>
> On 09/06/11 08:46, Mohamed Shafi wrote:
>> Hi,
>>
>> I am doing a private port in GCC 4.5.1. For the my target i see some
>> strange behavior in delay slot scheduling. For my target the
>> instruction in the delay slots gets executed irrespective of whether
>> the branch is taken or not. I have generated the following code
>> after commenting out the call to 'relax_delay_slots' in the function
>> 'dbr_schedule'.
> [ ... ]
> It looks like you have found a bug. ?While reorg.c is supposed to work
> with targets that have multiple delay slots, it's not something that has
> been extensively tested.
>
>>>
>> I think REGOUT dependency of g1 between instructions 38 and 43 in
>> the delay slot is not being considered by 'try_merge_delay_insns'.
> You're probably correct.
>
> Jeff
How do raise a bug report, mine being a private target?
Regards,
Shafi