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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
Date: Sat, 08 Jan 2005 18:37:00 -0000 [thread overview]
Message-ID: <20050108183708.1096.qmail@sourceware.org> (raw)
In-Reply-To: <20050108182401.19331.giovannibajo@libero.it>
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-08 18:37 -------
Hmm, on PPC, the mainline produces much better code than 3.3.2.
3.3.2:
lbz r6,69(r1)
la r2,lo16(_params)(r7)
lwz r3,48(r2)
addi r1,r1,80
rlwinm r5,r6,26,31,31
rlwinm r4,r6,27,31,31
rlwinm r0,r6,28,31,31
rlwimi r3,r6,23,1,1
rlwimi r3,r5,29,2,2
rlwimi r3,r4,28,3,3
rlwimi r3,r0,27,4,4
stw r3,48(r2)
mainline:
lwz r2,60(r1)
lwz r0,48(r9)
addi r1,r1,80
rlwimi r0,r2,7,1,1
rlwimi r0,r2,7,2,2
rlwimi r0,r2,7,3,3
rlwimi r0,r2,7,4,4
stw r0,48(r9)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
next prev parent reply other threads:[~2005-01-08 18:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-08 18:24 [Bug rtl-optimization/19331] New: " giovannibajo at libero dot it
2005-01-08 18:24 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
2005-01-08 18:26 ` pinskia at gcc dot gnu dot org
2005-01-08 18:27 ` giovannibajo at libero dot it
2005-01-08 18:28 ` [Bug middle-end/19331] " pinskia at gcc dot gnu dot org
2005-01-08 18:28 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
2005-01-08 18:28 ` [Bug middle-end/19331] " giovannibajo at libero dot it
2005-01-08 18:37 ` pinskia at gcc dot gnu dot org [this message]
2005-01-08 19:02 ` pinskia at gcc dot gnu dot org
2005-01-27 0:23 ` steven at gcc dot gnu dot org
2005-02-01 0:33 ` pinskia at gcc dot gnu dot org
2005-02-01 5:57 ` pinskia at gcc dot gnu dot org
2005-03-13 15:08 ` [Bug middle-end/19331] [4.0/4.1 " giovannibajo at libero dot it
2005-03-13 22:34 ` cvs-commit at gcc dot gnu dot org
2005-03-13 23:29 ` [Bug middle-end/19331] [4.0 " pinskia at gcc dot gnu dot org
2005-03-14 3:49 ` cvs-commit at gcc dot gnu dot org
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
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