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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/62631] gcc.dg/tree-ssa/ivopts-lt-2.c FAILs
Date: Fri, 06 Feb 2015 07:10:00 -0000 [thread overview]
Message-ID: <bug-62631-4-X5hgkdVq3j@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-62631-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62631
--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The assembly is as below on sparc64:
> f1:
> .register %g2, #scratch
> sllx %o1, 2, %g1
> mov 99, %g2
> add %o0, %g1, %o0
> sub %g2, %o1, %o1
> srl %o1, 0, %g1
> add %g1, 1, %g1
> sllx %g1, 2, %g1
> add %o0, %g1, %g1
> st %g0, [%o0]
> .LL5:
> add %o0, 4, %o0
> cmp %o0, %g1
> blu,a,pt %xcc, .LL5
> st %g0, [%o0]
> jmp %o7+8
> nop
How did you configure the compiler? We're talking about 64-bit SPARC/Solaris
and here's the code actually generated for the time being:
.type f1, #function
.proc 020
f1:
sllx %o1, 2, %g1
add %o0, %g1, %o0
.LL2:
st %g0, [%o0]
add %o1, 1, %g1
add %o0, 4, %o0
cmp %g1, 99
bleu,pt %icc, .LL2
srl %g1, 0, %o1
jmp %o7+8
nop
so it is still suboptimal, hence my generic fix.
>From gcc-bugs-return-476212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Feb 06 07:22:17 2015
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/62631] gcc.dg/tree-ssa/ivopts-lt-2.c FAILs
Date: Fri, 06 Feb 2015 07:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62631
--- Comment #20 from amker at gcc dot gnu.org ---
(In reply to Eric Botcazou from comment #19)
> > The assembly is as below on sparc64:
> > f1:
> > .register %g2, #scratch
> > sllx %o1, 2, %g1
> > mov 99, %g2
> > add %o0, %g1, %o0
> > sub %g2, %o1, %o1
> > srl %o1, 0, %g1
> > add %g1, 1, %g1
> > sllx %g1, 2, %g1
> > add %o0, %g1, %g1
> > st %g0, [%o0]
> > .LL5:
> > add %o0, 4, %o0
> > cmp %o0, %g1
> > blu,a,pt %xcc, .LL5
> > st %g0, [%o0]
> > jmp %o7+8
> > nop
>
> How did you configure the compiler? We're talking about 64-bit
> SPARC/Solaris and here's the code actually generated for the time being:
>
> .type f1, #function
> .proc 020
> f1:
> sllx %o1, 2, %g1
> add %o0, %g1, %o0
> .LL2:
> st %g0, [%o0]
> add %o1, 1, %g1
> add %o0, 4, %o0
> cmp %g1, 99
> bleu,pt %icc, .LL2
> srl %g1, 0, %o1
> jmp %o7+8
> nop
>
> so it is still suboptimal, hence my generic fix.
Ouch, my bad. That code is generated because I forced gcc to do the iv
replacement by decreasing the cost. The trunk generates assembly just like
yours.
Thanks.
>From gcc-bugs-return-476213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Feb 06 08:12:06 2015
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/17982] stop calling assemble_external before final assembly output time
Date: Fri, 06 Feb 2015 08:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id\x17982
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |law at redhat dot com
Resolution|--- |FIXED
--- Comment #36 from Jeffrey A. Law <law at redhat dot com> ---
This was fixed in 2012.
next prev parent reply other threads:[~2015-02-06 7:10 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 13:52 [Bug tree-optimization/62631] New: " ro at gcc dot gnu.org
2014-09-01 13:53 ` [Bug tree-optimization/62631] " ro at gcc dot gnu.org
2014-09-01 14:06 ` ro at gcc dot gnu.org
2014-09-01 14:26 ` ro at gcc dot gnu.org
2014-09-01 14:27 ` ro at gcc dot gnu.org
2014-09-02 6:00 ` amker.cheng at gmail dot com
2014-09-07 19:37 ` danglin at gcc dot gnu.org
2014-09-11 5:48 ` amker at gcc dot gnu.org
2014-09-11 8:43 ` ro at CeBiTec dot Uni-Bielefeld.DE
2014-09-12 10:58 ` ro at CeBiTec dot Uni-Bielefeld.DE
2015-02-02 23:22 ` [Bug target/62631] " ebotcazou at gcc dot gnu.org
2015-02-03 9:57 ` ebotcazou at gcc dot gnu.org
2015-02-03 10:54 ` amker at gcc dot gnu.org
2015-02-04 4:06 ` amker at gcc dot gnu.org
2015-02-04 11:45 ` ebotcazou at gcc dot gnu.org
2015-02-04 14:43 ` ebotcazou at gcc dot gnu.org
2015-02-06 6:20 ` amker at gcc dot gnu.org
2015-02-06 7:10 ` ebotcazou at gcc dot gnu.org [this message]
2015-02-06 11:18 ` ebotcazou at gcc dot gnu.org
2015-02-06 11:26 ` ebotcazou at gcc dot gnu.org
2015-02-06 11:33 ` ebotcazou at gcc dot gnu.org
2015-02-06 15:52 ` dave.anglin at bell dot net
2015-02-07 19:08 ` dave.anglin at bell dot net
2015-02-07 22:24 ` ebotcazou at gcc dot gnu.org
2015-02-07 23:14 ` dave.anglin at bell dot net
2015-02-08 14:07 ` amker at gcc dot gnu.org
2015-02-08 14:09 ` amker at gcc dot gnu.org
2015-02-08 14:59 ` dave.anglin at bell dot net
2015-02-08 21:44 ` ebotcazou at gcc dot gnu.org
2015-02-09 3:24 ` amker at gcc dot gnu.org
2015-02-09 8:11 ` amker at gcc dot gnu.org
2015-04-22 12:01 ` jakub at gcc dot gnu.org
2015-07-16 9:13 ` rguenth at gcc dot gnu.org
2022-01-09 0:42 ` pinskia at gcc dot gnu.org
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