[Bug rtl-optimization/82395] [8 Regression] qsort comparator non-negative on sorted output: 1 in color_allocnos

["sje at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82395

Steve Ellcey <sje at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sje at gcc dot gnu.org

--- Comment #2 from Steve Ellcey <sje at gcc dot gnu.org> ---
I tried the patch on an aarch64 bootstrap and it still fails, though the trace
looks different.

/home/sellcey/gcc-stdc/obj/gcc/aarch64-unknown-linux-gnu/libstdc++-v3/include/bits/deque.tcc:626:7:
error: qsort comparator non-negative on sorted output: 8
       }
       ^
during RTL pass: sched2
/home/sellcey/gcc-stdc/obj/gcc/aarch64-unknown-linux-gnu/libstdc++-v3/include/bits/deque.tcc:626:7:
internal compiler error: qsort checking failed
0x1d1c5c7 qsort_chk_error
        ../../../src/gcc/gcc/vec.c:222
0x1d1c9e7 qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
        ../../../src/gcc/gcc/vec.c:274
0x1be2ebf ready_sort_real
        ../../../src/gcc/gcc/haifa-sched.c:3087
0x1be2f53 ready_sort
        ../../../src/gcc/gcc/haifa-sched.c:3103
0x1bede13 schedule_block(basic_block_def**, void*)
        ../../../src/gcc/gcc/haifa-sched.c:6749
0x1285b9f schedule_region
        ../../../src/gcc/gcc/sched-rgn.c:3174
0x1286da3 schedule_insns()
        ../../../src/gcc/gcc/sched-rgn.c:3513
0x1287acf rest_of_handle_sched2
        ../../../src/gcc/gcc/sched-rgn.c:3737
0x1287d2f execute
        ../../../src/gcc/gcc/sched-rgn.c:3873
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