https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100225
Bug ID: 100225
Summary: [8/9/10/11/12 Regression] ICE in
add_cross_iteration_register_deps, at ddg.c:291
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: aarch64-linux-gnu
gcc-11.0.1-alpha20210418 snapshot (g:b412ce8e961052e6becea3bc783a53e1d5feaa0f)
ICEs when compiling the following testcase w/ -O1 -fmodulo-sched:
void
vorbis_synthesis_lapout (void);
void
ov_info (int **lappcm, int ov_info_i)
{
while (ov_info_i < 1)
lappcm[ov_info_i++] = __builtin_alloca (1);
vorbis_synthesis_lapout ();
}
% aarch64-linux-gnu-gcc-11.0.1 -O1 -fmodulo-sched -c oacjgazv.c
during RTL pass: sms
oacjgazv.c: In function 'ov_info':
oacjgazv.c:11:1: internal compiler error: in add_cross_iteration_register_deps,
at ddg.c:291
11 | }
| ^
0x8913fa add_cross_iteration_register_deps
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210418/work/gcc-11-20210418/gcc/ddg.c:291
0x8913fa build_inter_loop_deps
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210418/work/gcc-11-20210418/gcc/ddg.c:360
0x8913fa create_ddg(basic_block_def*, int)
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210418/work/gcc-11-20210418/gcc/ddg.c:605
0x1a90489 sms_schedule
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210418/work/gcc-11-20210418/gcc/modulo-sched.c:1513
0x1a9066f execute
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210418/work/gcc-11-20210418/gcc/modulo-sched.c:3345
