https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93397
Bug ID: 93397
Summary: [10 Regression] ICE in
vect_create_epilog_for_reduction
Product: gcc
Version: 10.0
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: ---
Target: x86_64-pc-linux-gnu-gcc
gcc-10.0.0-alpha20200119 snapshot (g:3684bbb022cd75da55e1457673f269980aa12cdf)
ICEs when compiling the following testcase w/ -O1 -ftree-loop-vectorize:
char
bn (char *vu)
{
int b6;
char wv = 0;
for (b6 = 0; b6 <= 64; b6 += 4)
wv += vu[b6] + vu[b6 + 1];
return wv;
}
% x86_64-pc-linux-gnu-gcc-10.0.0-alpha20200119 -O1 -ftree-loop-vectorize -c
lpvpaf2g.c
during GIMPLE pass: vect
lpvpaf2g.c: In function 'bn':
lpvpaf2g.c:2:1: internal compiler error: Segmentation fault
2 | bn (char *vu)
| ^~
0xd8568f crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/toplev.c:328
0xfee25c vec<_stmt_vec_info*, va_heap, vl_ptr>::operator[](unsigned int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/vec.h:1433
0xfee25c vect_create_epilog_for_reduction
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-loop.c:5467
0xfee25c vectorizable_live_operation(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*, int, bool, vec<stmt_info_for_cost, va_heap,
vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-loop.c:7856
0xfb99fc can_vectorize_live_stmts
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-stmts.c:10707
0xfdc694 vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-stmts.c:11159
0xfde4ae vect_transform_loop_stmt
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-loop.c:8299
0xff4eda vect_transform_loop(_loop_vec_info*)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vect-loop.c:8699
0x1011f88 try_vectorize_loop_1
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vectorizer.c:989
0x1012c89 vectorize_loops()
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200119/work/gcc-10-20200119/gcc/tree-vectorizer.c:1125
