https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95272
Bug ID: 95272
Summary: ice in vectorizable_reduction, at
tree-vect-loop.c:6197
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C++ code:
enum { a = 5, b };
typedef struct {
int c[b];
} d;
extern d e[];
int f;
int g[6];
void h() {
int i;
for (; f; f++) {
i = 0;
for (; i < b; i++)
if (e[f].c[i])
g[i] = e[f].c[i];
}
}
compiled by recent gcc trunk and compiler flags -w -c -O3 -march=cooperlake,
I get:
during GIMPLE pass: vect
bug613.cc: In function ‘void h()’:
bug613.cc:8:6: internal compiler error: in vectorizable_reduction, at
tree-vect-
loop.c:6197
8 | void h() {
| ^
0x11e91f5 vectorizable_reduction(_loop_vec_info*, _stmt_vec_info*, _slp_tree*,
_
slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
../../trunk.git/gcc/tree-vect-loop.c:6197
0x11bb55d vect_analyze_stmt(vec_info*, _stmt_vec_info*, bool*, _slp_tree*,
_slp_
instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
../../trunk.git/gcc/tree-vect-stmts.c:11067
0x120767d vect_slp_analyze_node_operations_1(vec_info*, _slp_tree*,
_slp_instanc
e*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
../../trunk.git/gcc/tree-vect-slp.c:2676
0x120767d vect_slp_analyze_node_operations(vec_info*, _slp_tree*,
_slp_instance*
, hash_set<_slp_tree*, false, default_hash_traits<_slp_tree*> >&,
hash_set<_slp_
tree*, false, default_hash_traits<_slp_tree*> >&, vec<stmt_info_for_cost,
va_hea
p, vl_ptr>*)
../../trunk.git/gcc/tree-vect-slp.c:2844
The problem first seems to occur sometime between dates 20200521 and
20200522. git hashes f094665d465..e740f3d7314
