https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84032
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-01-31
CC| |dmalcolm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Confirmed (with --target=powerpc-linux_spe and r257097 fwiw)
Assertion fails here:
#2 0x00000000013584ef in optimize_sc (g=0x1f2cf30, g=0x1f2cf30, ps=0x1f939b0)
at ../../src/gcc/modulo-sched.c:1064
1064 gcc_assert (success && (num_splits == 0));
within this recovery code:
1045 gcc_assert (num_splits == 0);
1046 if (!success)
1047 {
1048 if (dump_file)
1049 fprintf (dump_file,
1050 "SMS failed to schedule branch at cycle: %d, "
1051 "bringing it back to cycle %d\n", c,
branch_cycle);
1052
1053 /* The branch was failed to be placed in row ii - 1.
1054 Put it back in it's original place in the partial
1055 schedualing. */
1056 set_must_precede_follow (&tmp_follow, must_follow,
&tmp_precede,
1057 must_precede, branch_cycle, start,
end,
1058 step);
1059 success =
1060 try_scheduling_node_in_cycle (ps, g->closing_branch->cuid,
1061 branch_cycle, sched_nodes,
1062 &num_splits, tmp_precede,
1063 tmp_follow);
1064 gcc_assert (success && (num_splits == 0));
1065 ok = false;
(gdb) p num_splits
$4 = 0
(gdb) p success
$5 = <optimized out>
but presumably try_scheduling_node_in_cycle returned 0
