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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/52306] ICE in CSE
Date: Sun, 25 Mar 2012 13:51:00 -0000 [thread overview]
Message-ID: <bug-52306-4-A7dleOfaml@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52306-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52306
Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-03-25
CC| |bernds at gcc dot gnu.org
Ever Confirmed|0 |1
--- Comment #2 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-03-25 13:46:43 UTC ---
FWIW, the problem is AFAICT still present in mainline, but it is latent, for
the testcase no longer triggers the problem that 4.6 did. The only change I
could find to relevant portions of the reload code was the fix for bug 47976,
but it doesn't seem to fix this particular issue. Regardless, maybe Bernd can
offer some guidance since he's the reload expert ;-)
In GCC 4.6 r185770, the reloads for insn 288 are:
Reloads for insn # 288
Reload 0: reload_in (SI) = (post_inc:SI (reg:SI 145 [ ivtmp.76 ]))
reload_out (SI) = (post_inc:SI (reg:SI 145 [ ivtmp.76 ]))
ADDR_REGS, RELOAD_FOR_OPERAND_ADDRESS (opnum = 1), inc by 4
reload_in_reg: (post_inc:SI (reg:SI 145 [ ivtmp.76 ]))
reload_reg_rtx: (reg:SI 9 %a1)
Reload 1: reload_out (SI) = (reg/f:SI 124 [ D.1788 ])
GENERAL_REGS, RELOAD_FOR_OUTPUT (opnum = 0), optional
reload_out_reg: (reg/f:SI 124 [ D.1788 ])
Reload 2: reload_in (SI) = (mem/f:SI (post_inc:SI (reg:SI 145 [ ivtmp.76 ])) [5
MEM[base: D.1889_285, offset: 0B]+0 S4 A16])
GENERAL_REGS, RELOAD_FOR_INPUT (opnum = 1), optional
reload_in_reg: (mem/f:SI (post_inc:SI (reg:SI 145 [ ivtmp.76 ])) [5
MEM[base: D.1889_285, offset: 0B]+0 S4 A16])
in GCC trunk r185451, the same insn is numbered 296, and it has a single
reload, for both pseudos already got REGs:
Reload 0: reload_in (SI) = (mem/f:SI (post_inc:SI (reg:SI 9 %a1 [orig:110
ivtmp.82 ] [110])) [4 MEM[base: D.1990_299, offset: 0B]+0 S4 A16])
GENERAL_REGS, RELOAD_FOR_INPUT (opnum = 1), optional
reload_in_reg: (mem/f:SI (post_inc:SI (reg:SI 9 %a1 [orig:110 ivtmp.82
] [110])) [4 MEM[base: D.1990_299, offset: 0B]+0 S4 A16])
next prev parent reply other threads:[~2012-03-25 13:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-18 23:32 [Bug middle-end/52306] New: " tg at mirbsd dot org
2012-03-25 12:47 ` [Bug middle-end/52306] " aoliva at gcc dot gnu.org
2012-03-25 13:51 ` aoliva at gcc dot gnu.org [this message]
2012-05-06 14:29 ` tg at mirbsd dot org
2012-05-06 17:05 ` tg at mirbsd dot org
2012-12-04 9:27 ` tg at mirbsd dot org
2012-12-04 10:29 ` mikpe at it dot uu.se
2012-12-04 12:59 ` tg at mirbsd dot org
2012-12-04 22:06 ` mikpe at it dot uu.se
2012-12-06 9:50 ` mikpe at it dot uu.se
2012-12-06 9:53 ` jakub at gcc dot gnu.org
2012-12-24 0:53 ` tg at mirbsd dot org
2013-01-29 21:17 ` [Bug middle-end/52306] ICE in cselib_record_set, at cselib.c:2158 tg at mirbsd dot org
2013-01-29 21:26 ` tg at mirbsd dot org
2013-01-29 23:30 ` tg at mirbsd dot org
2013-01-30 17:34 ` mikpe at it dot uu.se
2013-01-30 17:50 ` mikpe at it dot uu.se
2013-02-06 23:25 ` mikpe at it dot uu.se
2013-02-07 8:14 ` jakub at gcc dot gnu.org
2013-08-17 17:31 ` tg at mirbsd dot org
2013-08-17 18:44 ` tg at mirbsd dot org
2013-08-22 16:28 ` tg at mirbsd dot org
2013-12-19 9:02 ` schwab@linux-m68k.org
2013-12-19 10:40 ` mikpelinux at gmail dot com
2013-12-19 11:12 ` [Bug middle-end/52306] [4.8/4.9 regression] " ebotcazou at gcc dot gnu.org
2013-12-19 11:22 ` schwab@linux-m68k.org
2013-12-19 11:28 ` amker.cheng at gmail dot com
2013-12-19 15:18 ` rguenth at gcc dot gnu.org
2014-02-10 5:37 ` law at redhat dot com
2014-02-10 16:26 ` law at gcc dot gnu.org
2014-02-10 16:26 ` [Bug middle-end/52306] [4.8 " law at redhat dot com
2014-02-19 22:02 ` schwab@linux-m68k.org
2014-02-23 14:21 ` mikpelinux at gmail dot com
2014-05-22 9:07 ` rguenth at gcc dot gnu.org
2014-12-19 13:44 ` jakub at gcc dot gnu.org
2015-01-19 22:34 ` law at redhat dot com
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