[Bug optimization/12177] New: -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[Bug optimization/12177] New: -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[peorth at artificial dot ath dot cx]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

           Summary: -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: peorth at artificial dot ath dot cx
                CC: gcc-bugs at gcc dot gnu dot org

When combining these options on some code, it aborts with an ICE. If any of these are omitted, 
there's no ICE.

Currently this happens in ffmpeg-0.4.7_pre20030624/libabcodec/h263.c:1592: internal compiler 
error: in reloads_to_loads, at ra-rewrite.c:1068. The line in the source file is just a closing bracket, 
so it doesn't appear to shed much light on why (but I'm no expert in this stuff).

The code block in this case appears to be:
/* must be called before writing the header */
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number){
    int time_div, time_mod;

    if(s->pict_type==I_TYPE){ //we will encode a vol header
        int dummy;
        av_reduce(&s->time_increment_resolution, &dummy, s->avctx->frame_rate, 
s->avctx->frame_rate_base, (1<<16)-1);

        s->time_increment_bits = av_log2(s->time_increment_resolution - 1) + 1;
    }

    if(s->current_picture.pts)
        s->time= (s->current_picture.pts*s->time_increment_resolution + 500*1000)/(1000*1000);
    else
        s->time= av_rescale(picture_number*(int64_t)s->avctx->frame_rate_base, 
s->time_increment_resolution, s->avctx->fram$
    time_div= s->time/s->time_increment_resolution;
    time_mod= s->time%s->time_increment_resolution;

    if(s->pict_type==B_TYPE){
        s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
    }else{
        s->last_time_base= s->time_base;
        s->time_base= time_div;
        s->pp_time= s->time - s->last_non_b_time;
        s->last_non_b_time= s->time;
    }
}

The pre-processed source it said to attach appears the same from it, so I won't be redundant.

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[peorth at artificial dot ath dot cx]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177



------- Additional Comments From peorth at artificial dot ath dot cx  2003-09-05 07:36 -------
Created an attachment (id=4703)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4703&action=view)
preprocessed source

preprocessed source code from h623.c, which causes the ICE.

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[peorth at artificial dot ath dot cx]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177



------- Additional Comments From peorth at artificial dot ath dot cx  2003-09-05 07:38 -------
I forgot to mention, the command line in this case is:
gcc -O2 -pipe -fomit-frame-pointer -fnew-ra -Wall -g -DHAVE_AV_CONFIG_H -I.. 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE -c -o h263.o h263.c -ftracer
gcc -v is:
Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/specs
Configured with: /var/tmp/portage/gcc-3.3.1/work/gcc-3.3.1/configure --prefix=/usr 
--bindir=/usr/i686-pc-linux-gnu/gcc-bin/3.3 --includedir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.
1/include --datadir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3 
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3/man 
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3/info --enable-shared --host=i686-pc-linux-gnu 
--target=i686-pc-linux-gnu --with-system-zlib --enable-languages=c,c++,ada,f77,objc,java 
--enable-threads=posix --enable-long-long --disable-checking --enable-cstdio=stdio 
--enable-clocale=generic --enable-__cxa_atexit --enable-version-specific-runtime-libs 
--with-gxx-include-dir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/include/g++-v3 
--with-local-prefix=/usr/local --enable-shared --enable-nls --without-included-gettext 
--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib --enable-interpreter 
--enable-java-awt=xlib --with-x --disable-multilib
Thread model: posix
gcc version 3.3.1  (Gentoo Linux 3.3.1, propolice)

Despite what it says, the propolice+etc protection code shouldn't actually be enabled when 
compiling anything.

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[pinskia at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177



------- Additional Comments From pinskia at gcc dot gnu dot org  2003-09-05 15:04 -------
Most likely related to bug 11379 and bug 12143.

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |13246
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |3.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[dhazeghi at yahoo dot com]

------- Additional Comments From dhazeghi at yahoo dot com  2004-01-18 01:23 -------
Created an attachment (id=5511)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5511&action=view)
reduced testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug optimization/12177] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[dhazeghi at yahoo dot com]

------- Additional Comments From dhazeghi at yahoo dot com  2004-01-18 01:45 -------
Confirmed with mainline (20040117)

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2004-01-18 01:45:45
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug optimization/12177] [new-ra] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[1319 at bot dot ru]

------- Additional Comments From 1319 at bot dot ru  2004-03-24 08:05 -------
Another obscure new RA bug (bug?) eaten quietly.
(i.e. current new RA compiles foo.c happily)

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug optimization/12177] [new-ra] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-24 15:51 -------
Keeping this one suspended as it is fixed on the new-ra brnach, thanks Serge Belyshev for testing.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|3.3.1                       |new-ra


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177

[Bug rtl-optimization/12177] [new-ra] -new-ra with -ftracer, -fomit-frame-pointer, and -O2 ICE

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-17 15:18 -------
Closing as wiill not fix as new-ra was removed from the mainline.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|SUSPENDED                   |RESOLVED
         Resolution|                            |WONTFIX
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12177