https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103800
Bug ID: 103800
Summary: ICE in vectorizable_phi, at tree-vect-loop.c:7861 with
-O3 -march=skylake-avx512
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
Link to the Compiler Explorer: https://godbolt.org/z/bWdof9c8s
Reproducer:
int a;
long b;
extern int c[], d[];
extern bool e[];
void f() {
if (a)
;
for (;;) {
for (int g = 2; g; g = a)
d[g] = 0;
for (int h = 1; h < 13; h++)
e[h] = b ? (short)c[4 + h - 1] : c[4 + h - 1];
}
}
Error:
>$ g++ -O3 -march=skylake-avx512 -c func.cpp
during GIMPLE pass: slp
func.cpp: In function 'void f()':
func.cpp:5:6: internal compiler error: in vectorizable_phi, at
tree-vect-loop.c:7861
5 | void f() {
| ^
0x8bca05 vectorizable_phi(vec_info*, _stmt_vec_info*, gimple**, _slp_tree*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/testing/gcc/gcc_src_master/gcc/tree-vect-loop.c:7861
0x20abd84 vect_analyze_stmt(vec_info*, _stmt_vec_info*, bool*, _slp_tree*,
_slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/testing/gcc/gcc_src_master/gcc/tree-vect-stmts.c:11125
0x14a2186 vect_slp_analyze_node_operations_1
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4481
0x14a2186 vect_slp_analyze_node_operations
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4640
0x14a2097 vect_slp_analyze_node_operations
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4620
0x14a2097 vect_slp_analyze_node_operations
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4620
0x14a2097 vect_slp_analyze_node_operations
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4620
0x14a4811 vect_slp_analyze_operations(vec_info*)
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:4879
0x14a9605 vect_slp_analyze_bb_1
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:5817
0x14a9605 vect_slp_region
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:5864
0x14aae33 vect_slp_bbs
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:6056
0x14ab22c vect_slp_function(function*)
/testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:6144
0x14b1c82 execute
/testing/gcc/gcc_src_master/gcc/tree-vectorizer.c:1503
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
GCC version:
gcc version 12.0.0 20211219 (fcbf94a5be9e0c1ecad92da773a6632b86b7f70a) (GCC)
