From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Hubicka <jh@suse.cz>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org
Subject: Re: optimization/4054: ICE with "-O2 and -march=k6" on i686-pc-linux-gnu/gcc 3.1
Date: Thu, 23 Aug 2001 08:46:00 -0000
Message-id: <20010823154603.19786.qmail@sourceware.cygnus.com>
X-SW-Source: 2001-08/msg00593.html
List-Id: <gcc-prs.sourceware.org>

The following reply was made to PR optimization/4054; it has been noted by GNATS.

From: Jan Hubicka <jh@suse.cz>
To: cain@nationwide.net
Cc: gcc-gnats@gcc.gnu.org, cmonico@nd.edu
Subject: Re: optimization/4054: ICE with "-O2 and -march=k6" on i686-pc-linux-gnu/gcc 3.1
Date: Thu, 23 Aug 2001 17:38:34 +0200

 > 
 > >Number:         4054
 > >Category:       optimization
 > >Synopsis:       ICE with "-O2 and -march=k6" on i686-pc-linux-gnu/gcc 3.1
 > >Confidential:   no
 > >Severity:       critical
 > >Priority:       high
 > >Responsible:    unassigned
 > >State:          open
 > >Class:          ice-on-legal-code
 > >Submitter-Id:   net
 > >Arrival-Date:   Sat Aug 18 00:16:00 PDT 2001
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Roy Cain
 > >Release:        gcc version 3.1 20010723 (experimental)
 > >Organization:
 > >Environment:
 > Linux 2.4.5
 > Slackware 8.0
 > CPU K7 Athlon slot A 1.0 GHz
 > System type: i686-pc-linux-gnu
 > Configured with: /gcc_cvs/gcc/configure --enable-languages=c --disable-nls
 > >Description:
 > gcc -v -save-temps -DX86L -O2 -march=k6 verifypt.c
 > 
 > eccp109/verifypt.c: In function `hardVerifyPt':
 > eccp109/verifypt.c:77: Unrecognizable insn:
 > (insn 348 290 349 (parallel[ 
 >             (set (reg:SI 1 edx [58])
 >                 (const_int 0 [0x0]))
 >             (clobber (reg:CC 17 flags))
 >         ] ) -1 (nil)
 >     (expr_list:REG_UNUSED (reg:CC 17 flags)
 >         (nil)))
 > eccp109/verifypt.c:77: Internal compiler error in extract_insn, at recog.c:2127
 
 SHould be fixed by the attached patch I am about to install as obvious
 once bootstrap finish.
 
 Thu Aug 23 17:05:25 CEST 2001  Jan Hubicka  <jh@suse.cz>
 
 	* i386.md (setcc peep2): Fix load of zero.
 
 *** i386.md.old	Wed Aug 22 15:21:39 2001
 --- i386.md	Wed Aug 22 15:22:04 2001
 ***************
 *** 13145,13152 ****
   	(zero_extend (match_dup 1)))]
     "peep2_reg_dead_p (3, operands[1])
      && ! reg_overlap_mentioned_p (operands[3], operands[0])"
 !   [(parallel [(set (match_dup 3) (const_int 0))
 ! 	      (clobber (reg:CC 17))])
      (set (match_dup 4) (match_dup 0))
      (set (strict_low_part (match_dup 5))
   	(match_dup 2))]
 --- 13145,13151 ----
   	(zero_extend (match_dup 1)))]
     "peep2_reg_dead_p (3, operands[1])
      && ! reg_overlap_mentioned_p (operands[3], operands[0])"
 !   [(parallel [(set (match_dup 3) (const_int 0))])
      (set (match_dup 4) (match_dup 0))
      (set (strict_low_part (match_dup 5))
   	(match_dup 2))]