[Bug c/53262] New: ICE compiling busybox 1.19.3 with gcc 4.7.0

[Bug c/53262] New: ICE compiling busybox 1.19.3 with gcc 4.7.0

[ncahill_alt at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53262

             Bug #: 53262
           Summary: ICE compiling busybox 1.19.3 with gcc 4.7.0
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ncahill_alt@yahoo.com


This code produces an internal compiler error with gcc 4.7.0.  Build it with
this command: gcc -O2 -o a a.c.

This is gcc built from the original 4.7.0 source, x86 32-bit.

**** a.c ******
typedef unsigned int size_t;
enum { 
 _ISalnum = 1  
};
extern __const unsigned short int **__ctype_b_loc (void) __attribute__
((__nothrow__)) __attribute__ ((__const));

void parse_config_file(char *map, size_t len) {
  char *end_3 = map + len - 3;
  char *end_7 = map + len - 7;
  char *p = map;
  char *q;
  int off;
  for (; p <= end_3; p++) {
    if (!(((*__ctype_b_loc ())[(int) ((*p))] & (unsigned short int) _ISalnum)
|| *p == '_'))    continue;
    if (p < end_7 && p[6] == '_') {
      if (!memcmp(p, "CONFIG", 6)) goto conf7;
    }
    continue;

    conf7: off = 7;
    for (q = p; q < end_3+3; q++) {}
    if (q != p) {
      use_config(p, q-p);
    }
  }
}

***** end a.c ****

a.c: In function 'parse_config_file':
a.c:28:10: internal compiler error: Segmentation fault


Thank you.
Neil Cahill.

[Bug c/53262] ICE compiling busybox 1.19.3 with gcc 4.7.0

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53262

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |i?86-*-*

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-07 11:15:15 UTC ---
Works for me on x86_64 with -m32.

[Bug middle-end/53262] ICE compiling busybox 1.19.3 with gcc 4.7.0

[ncahill_alt at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53262

--- Comment #2 from ncahill_alt at yahoo dot com 2012-05-07 17:54:44 UTC ---
Unfortunately, this is no longer happening for me.  I have made system changes
today but no changes to gcc at all.  But now the test passes just fine.  So
there is no longer any problem.  If it happens again, I'll be sure to report
that.  But yeah, it works.  It can only really be because of a difference in
the layout of the /dev folder.  But there is now no problem.

Please mark this as presumed working.  Thanks.

Neil Cahill.

[Bug middle-end/53262] ICE compiling busybox 1.19.3 with gcc 4.7.0

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53262

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-08 10:16:41 UTC ---
Fixed then.