https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83963
Bug ID: 83963
Summary: [8 Regression] [graphite] ICE in merge_sese, at
graphite-scop-detection.c:517
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-alpha20180121 snapshot (r256935) ICEs when compiling the following
snippet w/ -O1 (-O2, -O3, -Ofast) -floop-nest-optimize -fno-tree-loop-im:
int mg, et;
void
s5 (int is)
{
if (is == 0)
{
g6:
++is;
}
while (mg < 1)
{
while (et < 1)
{
if (is == 0)
return;
++et;
}
while (mg < 1)
++mg;
}
goto g6;
}
% gcc-8.0.0-alpha20180121 -O1 -floop-nest-optimize -fno-tree-loop-im -c
x1nazdon.c
during GIMPLE pass: graphite
x1nazdon.c: In function 's5':
x1nazdon.c:4:1: internal compiler error: in merge_sese, at
graphite-scop-detection.c:517
s5 (int is)
^~
0x72330b merge_sese
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite-scop-detection.c:515
0x72330b build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite-scop-detection.c:550
0x14523d5 build_scop_depth
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite-scop-detection.c:543
0x1452f31 build_scops(vec<scop*, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite-scop-detection.c:1556
0x1446204 graphite_transform_loops()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite.c:389
0x1447ea0 graphite_transforms
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite.c:475
0x1447ea0 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180121/work/gcc-8-20180121/gcc/graphite.c:552
