[Bug middle-end/94526] [10 Regression] cselib ICE building glibc sigpause for m68k and microblaze since r10-7575-g8662d0593438ecd498

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94526

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[10 Regression] cselib ICE  |[10 Regression] cselib ICE
                   |building glibc sigpause for |building glibc sigpause for
                   |m68k and microblaze         |m68k and microblaze since
                   |                            |r10-7575-g8662d0593438ecd49
                   |                            |8
      Known to fail|                            |10.0
     Ever confirmed|0                           |1
      Known to work|                            |9.3.0
   Target Milestone|---                         |10.0
   Last reconfirmed|                            |2020-04-08
             Status|UNCONFIRMED                 |NEW
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:

$ cat ice.i
typedef struct
{
  int __val[8 * sizeof 0];
} __sigset_t;

void
fn1 (__sigset_t *p1)
{
  __sigset_t *a = p1;
}

void fn3 ();

void
fn2 ()
{
  __sigset_t b;
  fn1 (&b);
  fn3 (b);
}

$ ./xgcc -B. -O2 -g ice.i
during RTL pass: vartrack
ice.i: In function ‘fn2’:
ice.i:20:1: internal compiler error: in new_elt_loc_list, at cselib.c:298
   20 | }
      | ^
0xb1538a new_elt_loc_list
        ../../gcc/cselib.c:298
0xb154ea new_elt_loc_list
        ../../gcc/cselib.c:322
0xb1a993 cselib_lookup_1
        ../../gcc/cselib.c:2301
0xb1aa39 cselib_lookup(rtx_def*, machine_mode, int, machine_mode)
        ../../gcc/cselib.c:2330
0x15511c7 use_type
        ../../gcc/var-tracking.c:5516
0x1551741 add_uses
        ../../gcc/var-tracking.c:5678
0x1551f8e add_uses_1
        ../../gcc/var-tracking.c:5832
0x109b117 note_uses(rtx_def**, void (*)(rtx_def**, void*), void*)
        ../../gcc/rtlanal.c:2042
0x15551c4 add_with_sets
        ../../gcc/var-tracking.c:6589
0xb1bc1e cselib_record_sets
        ../../gcc/cselib.c:2835
0xb1c40a cselib_process_insn(rtx_insn*)
        ../../gcc/cselib.c:2997
0x1560a96 vt_initialize
        ../../gcc/var-tracking.c:10228
0x156148c variable_tracking_main_1
        ../../gcc/var-tracking.c:10457
0x15615d7 variable_tracking_main()
        ../../gcc/var-tracking.c:10510
0x1561664 execute
        ../../gcc/var-tracking.c:10547
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