https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83238
Bug ID: 83238
Summary: [8 Regression] [graphite] ICE in
graphite_can_represent_scev, at
graphite-scop-detection.c:971
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20171126 snapshot (r255155) ICEs when compiling the following
snippet w/ -O2 -floop-parallelize-all:
void
vw (int *dk, int zd, int jb)
{
int sq;
int *kv = &sq;
for (sq = 0; sq < 2; ++sq)
{
int u1;
for (u1 = 0; u1 < 5; ++u1)
if (zd == 0)
return;
}
for (;;)
{
++zd;
if (zd == 0)
while (jb != 0)
kv = &jb;
while (*dk < 1)
{
for (jb = 0; jb < 2; ++jb)
{
}
++*dk;
}
for (*kv = 0; *kv < 2; ++*kv)
for (*dk = 0; *dk < 2; ++*dk)
{
}
}
}
% gcc-8.0.0-alpha20171126 -O2 -floop-parallelize-all -w -c kgclon2i.c
during GIMPLE pass: graphite
kgclon2i.c: In function 'vw':
kgclon2i.c:2:1: internal compiler error: in graphite_can_represent_scev, at
graphite-scop-detection.c:971
vw (int *dk, int zd, int jb)
^~
0x13f337e graphite_can_represent_scev
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:970
0x7e6c4e graphite_can_represent_expr
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:999
0x7e6c4e stmt_simple_for_scop_p
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:1104
0x7e6c4e harmful_loop_in_region
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:768
0x13f4177 build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:637
0x13f3df2 build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:628
0x13f4a31 build_scops(vec<scop*, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite-scop-detection.c:1658
0x13eb36d graphite_transform_loops()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:364
0x13ec4c0 graphite_transforms
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:447
0x13ec4c0 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171126/work/gcc-8-20171126/gcc/graphite.c:524
