https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83852
Bug ID: 83852
Summary: [8 Regression] ICE in sel_redirect_edge_and_branch, at
sel-sched-ir.c:5644 on 32-bit BE powerpc targets
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu, powerpcspe-*-linux-gnu
gcc-8.0.0-alpha20180114 snapshot (r256677) ICEs when compiling the following
snippet w/ -O2 -fselective-scheduling -fno-if-conversion -fno-tree-dse:
long long int uo;
unsigned int vt;
void
r5 (long long int h8, long long int pu)
{
short int wj;
long long int *mh = h8;
for (wj = 0; wj < 3; ++wj)
{
int oq;
long long int ns, xf;
h8 += 2;
oq = !!h8 && !!wj;
++uo;
vt ^= oq + uo;
ns = !!uo && !!vt;
xf = (h8 != 0) ? mh : 1;
pu += ns < xf;
}
for (pu = 0; pu < 1; ++pu)
{
int *sc;
sc = (int *)&pu;
*sc = 0;
}
}
% powerpc-e300c3-linux-gnu-gcc-8.0.0-alpha20180114 -O2 -fselective-scheduling
-fno-if-conversion -fno-tree-dse -w -c dii05jbd.c
during RTL pass: sched1
dii05jbd.c: In function 'r5':
dii05jbd.c:31:1: internal compiler error: in sel_redirect_edge_and_branch, at
sel-sched-ir.c:5644
}
^
0xbeaf73 sel_redirect_edge_and_branch(edge_def*, basic_block_def*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched-ir.c:5644
0xbebea9 maybe_tidy_empty_bb
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched-ir.c:3796
0xbec05b tidy_control_flow(basic_block_def*, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched-ir.c:3833
0xbec718 sel_remove_insn(rtx_insn*, bool, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched-ir.c:3970
0xbec8fe return_nop_to_pool(rtx_insn*, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched-ir.c:1062
0xbfb4c8 remove_temp_moveop_nops
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:4995
0xbfb4c8 schedule_expr_on_boundary
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:5470
0xbff0d1 fill_insns
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:5587
0xc00f0e schedule_on_fences
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7361
0xc00f0e sel_sched_region_2
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7499
0xc03711 sel_sched_region_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7541
0xc03711 sel_sched_region(int)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7642
0xc03de1 run_selective_scheduling()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7718
0xbdabd4 rest_of_handle_sched
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sched-rgn.c:3715
0xbdabd4 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sched-rgn.c:3825
