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From: Richard Henderson <rth@redhat.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: optimization/8178: __builtin_ffs broken
Date: Thu, 13 Mar 2003 00:46:00 -0000 [thread overview]
Message-ID: <20030313004600.21253.qmail@sources.redhat.com> (raw)
The following reply was made to PR optimization/8178; it has been noted by GNATS.
From: Richard Henderson <rth@redhat.com>
To: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
Cc: christianbiere@gmx.de, gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org,
falk.hueffner@student.uni-tuebingen.de, ebotcazou@libertysurf.fr,
gcc-patches@gcc.gnu.org
Subject: Re: optimization/8178: __builtin_ffs broken
Date: Wed, 12 Mar 2003 16:42:15 -0800
On Wed, Mar 12, 2003 at 01:30:29PM +0100, Volker Reichelt wrote:
> I can confirm that the problem is still present on k6.
> According to Phil's tester the problem for the ix86 was fixed
> between 2003-01-31 and 2003-02-01.
Backporting the patch you mention isn't an option, but
this bug is fixable for 3.2/3.3 trivially.
r~
* config/i386/i386.md (ffssi2): Tighten op1 predicate to
match the requirements of the output insns.
Index: gcc/config/i386/i386.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/i386/i386.md,v
retrieving revision 1.404.2.10
diff -c -p -d -u -r1.404.2.10 i386.md
--- gcc/config/i386/i386.md 12 Mar 2003 09:35:27 -0000 1.404.2.10
+++ gcc/config/i386/i386.md 13 Mar 2003 00:41:08 -0000
@@ -13671,7 +13671,7 @@
\f
(define_expand "ffssi2"
[(set (match_operand:SI 0 "nonimmediate_operand" "")
- (ffs:SI (match_operand:SI 1 "general_operand" "")))]
+ (ffs:SI (match_operand:SI 1 "nonimmediate_operand" "")))]
""
{
rtx out = gen_reg_rtx (SImode), tmp = gen_reg_rtx (SImode);
next reply other threads:[~2003-03-13 0:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-13 0:46 Richard Henderson [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-04-18 16:26 Falk Hueffner
2003-04-18 15:36 reichelt
2003-03-12 12:36 Volker Reichelt
2003-03-10 15:46 Eric Botcazou
2003-03-10 15:06 Volker Reichelt
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