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From: nathan@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org,
tabasso@tabasoft.it
Subject: Re: c/7888: wrong code produced by GCC 3.1
Date: Thu, 12 Sep 2002 05:42:00 -0000 [thread overview]
Message-ID: <20020912124212.23573.qmail@sources.redhat.com> (raw)
Synopsis: wrong code produced by GCC 3.1
State-Changed-From-To: feedback->closed
State-Changed-By: nathan
State-Changed-When: Thu Sep 12 05:42:11 2002
State-Changed-Why:
With a power pc 3.2 compiler the unoptimized code looks like
...
addi 10,31,16
lwz 9,0(10)
mr 11,9
lwz 7,32(31)
lwz 8,36(31)
stw 7,0(11)
stw 8,4(11)
addi 9,9,8
stw 9,0(10)
..
which looks correct for a single *dbplp++
the optimised loop looks like
.L13:
stw 9,0(3)
stw 10,4(3)
stwu 9,8(3)
stw 10,4(3)
stwu 9,8(3)
stw 10,4(3)
stwu 9,8(3)
stw 10,4(3)
addi 3,3,8
bdnz .L13
mr 11,3
which again looks correct.
If the problem persists, please provide
the target triplet, a *complete* code sample, and
indicate in the assembly where the error is, if possible.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7888
next reply other threads:[~2002-09-12 12:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-12 5:42 nathan [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-09-16 0:56 Nathan Sidwell
2002-09-15 17:56 Andrew Pinski
2002-09-13 2:56 Raul Tabasso
2002-09-12 2:36 Raul Tabasso
2002-09-11 9:01 nathan
2002-09-11 8:06 tabasso
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