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[Bug target/82398] New: error: qsort comparator non-negative on sorted output: 2 in fill_vec_av_set at gcc/sel-sched.c:3725


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82398

            Bug ID: 82398
           Summary: error: qsort comparator non-negative on sorted output:
                    2 in fill_vec_av_set at gcc/sel-sched.c:3725
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: ppc64le-linux-gnu

Using cross-compiler one can see after Alexander's commit r253295:

$ ppc64-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr56195.c  -Ofast
-fselective-scheduling
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr56195.c: In
function ‘fn’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr56195.c:31:1:
error: qsort comparator non-negative on sorted output: 2
 }
 ^
during RTL pass: sched1
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr56195.c:31:1:
internal compiler error: qsort checking failed
0x57afe6 qsort_chk_error
        .././../gcc/vec.c:222
0x128f3b5 qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
        .././../gcc/vec.c:274
0xb11ca3 vec<_expr*, va_heap, vl_embed>::qsort(int (*)(void const*, void
const*))
        .././../gcc/vec.h:973
0xb11ca3 vec<_expr*, va_heap, vl_ptr>::qsort(int (*)(void const*, void const*))
        .././../gcc/vec.h:1735
0xb11ca3 fill_vec_av_set
        .././../gcc/sel-sched.c:3725
0xb14493 fill_ready_list
        .././../gcc/sel-sched.c:4022
0xb14493 find_best_expr
        .././../gcc/sel-sched.c:4382
0xb14493 fill_insns
        .././../gcc/sel-sched.c:5539
0xb165b0 schedule_on_fences
        .././../gcc/sel-sched.c:7356
0xb165b0 sel_sched_region_2
        .././../gcc/sel-sched.c:7494
0xb18ae1 sel_sched_region_1
        .././../gcc/sel-sched.c:7536
0xb18ae1 sel_sched_region(int)
        .././../gcc/sel-sched.c:7637
0xb190c9 run_selective_scheduling()
        .././../gcc/sel-sched.c:7713
0xaf182d rest_of_handle_sched
        .././../gcc/sched-rgn.c:3715
0xaf182d execute
        .././../gcc/sched-rgn.c:3825

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