Scheduler questions (related to PR17808)

[Vladimir Makarov]

Andrey Belevantsev wrote:

> Vladimir Makarov wrote:
>
>> I'll look at this PR today.
>
>
> We've looked today at this issue. We think the problem is that 
> proposed patch of sched_get_condition() treats conditional jumps 
> likely to COND_EXECs, but it doesn't fix other places in sched-deps, 
> where COND_EXECs are considered. Maxim Kuvyrkov proposed the attached 
> patch, which allows gcc to bootstrap on ia64 and fixes the testcase in 
> PR.
>
It seems like processing cond-exec was added long ago in 2000 with 
keeping Itanium only in mind.  But other targets with conditional 
execution have other forms of jump insns.  So Richard Earnshaw made a 
quick fix a year ago.

On the first glance the patch looks ok for me but I am going to 
investigate this problem in more details.  So probably I'll approve it 
on the next week (sorry we have canadian holiday tomorrow).

Vlad