Scheduler questions (related to PR17808)

[James E Wilson]

Andrey Belevantsev wrote:
> We've also found that current mainline ICEs compiling the testcase with 
> "-O0 -fschedule-insns -fschedule-insns2".

I suspect this is a bug in ia64_reorg in ia64.c.  It shouldn't be trying 
to schedule during a non-optimizing compile.  So the line
   if (ia64_flag_schedule_insns2)
should be
   if (optimize && ia64_flag_schedule_insns2)
That gives us the desired affect that -fschedule-insns2 only works when 
optimizing.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com