gcc-3.1 ICE on ppc-linux, regression wrt 2.95

gcc-3.1 ICE on ppc-linux, regression wrt 2.95

[Michal Moskal]

Following code, compiled with 'gcc -O2 -c' :

#define NULL 0
#define PATH_MAX 1024
extern int verbose;

int pkgdir_update(int *npatches) 
{
    char            foo[PATH_MAX], tmpath[PATH_MAX], path[PATH_MAX];
    char            *linebuf = NULL;
    int             line_size = 0, nread, nerr = 0;

    
    while ((nread = getline(&linebuf, &line_size, NULL)) > 0) {
        char *p;

        if ((p = strchr(p, ' ')) == NULL) {
            nerr++;
            break;
        }
        (*npatches)++;
    }
    

    if (*npatches == 0)         /* outdated and no patches */
       nerr++;

    if (nerr == 0) {
        if (vf_localdirpath(tmpath, sizeof(tmpath), path) < (int)sizeof(tmpath)) {
            verbose--; /* verbosity need to be reorganized... */
            rm_dir_files(tmpath);
           verbose++;
        }
        
        
    }
    
    return nerr == 0;
}

causes gcc 3.1 20020415 to ICE.

Reading specs from /usr/lib/gcc-lib/ppc-pld-linux/3.1/specs
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --enable-shared --enable-threads=posix
--enable-languages=c,c++,f77,gcov,java,objc,ksi,ada --enable-long-long
--enable-multilib --with-gnu-as --with-gnu-ld --with-system-zlib
--with-slibdir=/lib --without-x ppc-pld-linux
Thread model: posix
gcc version 3.1 20020415 (prerelease)

Example was destiled from bigger source (poldek pkg managment tool by
Pawel Gajda), I'm unable to cut it down.

It compiles fine with gcc 2.95.

-- 
: Michal Moskal :::::::: malekith/at/pld.org.pl :  GCS {C,UL}++++$ a? !tv
: PLD Linux ::::::: Wroclaw University, CS Dept :  {E-,w}-- {b++,e}>+++ h

Re: gcc-3.1 ICE on ppc-linux, regression wrt 2.95

[Michal Moskal]

On Wed, Apr 24, 2002 at 05:35:23PM +0200, Michal Moskal wrote:
> Following code, compiled with 'gcc -O2 -c' :
[snip]
> causes gcc 3.1 20020415 to ICE.

[instbld@eu11 instbld]$ gcc -c -O2 test.c                                                                    
test.c: In function `pkgdir_update':
test.c:37: unrecognizable insn:
(insn 208 82 209 (set (reg:SI 9 r9)
        (plus:SI (eq:SI (reg:SI 0 r0 [132])
                (const_int 0 [0x0]))
            (reg/v:SI 30 r30 [124]))) -1 (nil)
    (nil))
test.c:37: Internal compiler error in extract_insn, at recog.c:2132
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
[instbld@eu11 instbld]$ 

-- 
: Michal Moskal :::::::: malekith/at/pld.org.pl :  GCS {C,UL}++++$ a? !tv
: PLD Linux ::::::: Wroclaw University, CS Dept :  {E-,w}-- {b++,e}>+++ h

Re: gcc-3.1 ICE on ppc-linux, regression wrt 2.95

[David Edelsohn]

	Interesting.  The instruction exists with an additional CLOBBER,
but is not being recognized.

David