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[Bug middle-end/42973] [4.4/4.5 regression] IRA apparently systematically making reload too busy on 2 address instructions with 3 operands
- From: "hubicka at ucw dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Feb 2010 09:22:44 -0000
- Subject: [Bug middle-end/42973] [4.4/4.5 regression] IRA apparently systematically making reload too busy on 2 address instructions with 3 operands
- References: <bug-42973-176@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from hubicka at ucw dot cz 2010-02-10 09:22 -------
Subject: Re: [4.4/4.5 regression] IRA apparently
systematically making reload too busy on 2 address instructions
with 3 operands
Thanks, we should see if this solves the AMMP problem in a day or two.
Are you going to look at the related PR42961? Without the regmove hunk
it does not happen at AMMP but it likely happens elsewhere. I did some
work on this years back on old RA so I can play with it too.
(Simple fix would be to add ? penalizers to integer variant of FP moves,
but I would like to see some solution where RA actually can use integers
for mem->mem copies)
Honza
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42973