https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102832
Bug ID: 102832
Summary: [12 Regression] ICE in vect_create_partial_epilog with
-O3 -msve-vector-bits=128
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
The following fails:
$ cat t.c
int a, b;
char c;
signed char d(int e, int f) { return e - f; }
void g() {
a = 0;
for (; a >= -17; a = d(a, 1))
c ^= b;
}
$ aarch64-linux-gnu-gcc -c t.c -march=armv8.2-a+sve -O3 -msve-vector-bits=128
during GIMPLE pass: vect
t.c: In function ‘g’:
t.c:4:6: internal compiler error: in vect_create_partial_epilog, at
tree-vect-loop.c:5038
4 | void g() {
| ^
0x1156110 vect_create_partial_epilog
/home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:5035
0x1164be3 vect_transform_cycle_phi(_loop_vec_info*, _stmt_vec_info*, gimple**,
_slp_tree*, _slp_instance*)
/home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:7772
0x1150a1c vect_transform_stmt(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*)
/home/alecop01/toolchain/src/gcc/gcc/tree-vect-stmts.c:11107
0x1174723 vect_transform_loop(_loop_vec_info*, gimple*)
/home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:9731
0x11b0f44 try_vectorize_loop_1
/home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1111
0x11b1662 try_vectorize_loop_1
/home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1148
0x11b170b try_vectorize_loop
/home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1168
0x11b19e9 vectorize_loops()
/home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1249
0x1030ef3 execute
/home/alecop01/toolchain/src/gcc/gcc/tree-ssa-loop.c:413
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.
