https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97241
Bug ID: 97241
Summary: [11 Regression] ICE in vectorizable_reduction, at
tree-vect-loop.c:6503
Product: gcc
Version: 11.0
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-11.0.0-alpha20200927 snapshot (g:e24817aa7a1c6d12039b486ab5ea9b5ee0a46cd4)
ICEs when compiling the following testcase w/ -O3 --param
max-loop-header-insns=2:
short int *ev;
int l4;
short int
a7 (void)
{
short int uo = ev[0], ie = uo;
for (int kp = 0; kp < l4; kp += 4)
{
uo += ev[kp + 1];
ie += ev[kp];
}
return uo + ie;
}
% gcc-11.0.0 -O3 --param max-loop-header-insns=2 -c u56c7vpf.c
during GIMPLE pass: vect
u56c7vpf.c: In function 'a7':
u56c7vpf.c:5:1: internal compiler error: in vectorizable_reduction, at
tree-vect-loop.c:6503
5 | a7 (void)
| ^~
0x70b14d vectorizable_reduction(_loop_vec_info*, _stmt_vec_info*, _slp_tree*,
_slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-loop.c:6503
0x1012baf vect_analyze_stmt(vec_info*, _stmt_vec_info*, bool*, _slp_tree*,
_slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-stmts.c:10718
0x1046a5b vect_slp_analyze_node_operations_1
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:2814
0x1046a5b vect_slp_analyze_node_operations
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:2948
0x1046946 vect_slp_analyze_node_operations
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:2940
0x1046946 vect_slp_analyze_node_operations
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:2940
0x1046946 vect_slp_analyze_node_operations
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:2940
0x1048b06 vect_slp_analyze_operations(vec_info*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-slp.c:3129
0x102bf43 vect_analyze_loop_2
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-loop.c:2338
0x102bf43 vect_analyze_loop(loop*, vec_info_shared*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vect-loop.c:2799
0x104f761 try_vectorize_loop_1
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vectorizer.c:999
0x10501c1 vectorize_loops()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200927/work/gcc-11-20200927/gcc/tree-vectorizer.c:1234
