https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83512
--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
I've finally cloned PR82881 as I apparently don't have permissions to reopen
that PR. I'm also adding another similar testcase for the case:
int u3;
int
w7 (int *a9)
{
for (;;)
{
for (*a9 = 0; *a9 < 1; *a9++)
{
}
++u3;
}
}
% gcc-8.0.0-alpha20171217 -O2 -freorder-blocks-algorithm=simple -c mvsp6303.c
during RTL pass: bbro
mvsp6303.c: In function 'w7':
mvsp6303.c:14:1: internal compiler error: in df_compact_blocks, at
df-core.c:1729
}
^
0x5d7389 df_compact_blocks()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171217/work/gcc-8-20171217/gcc/df-core.c:1729
0x13acd65 compact_blocks()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171217/work/gcc-8-20171217/gcc/cfg.c:160
0x13a3f08 reorder_basic_blocks
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171217/work/gcc-8-20171217/gcc/bb-reorder.c:2480
0x13a3f08 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171217/work/gcc-8-20171217/gcc/bb-reorder.c:2570
(as of r255766)
