https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97579
Bug ID: 97579
Summary: [11 Regression] ICE in gimple_expand_vec_cond_expr, at
gimple-isel.cc:201 since r11-4123-g128f43cf679e5156
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: marxin at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
The issue was probably latent:
$ cat meteor.c
int bad_odd_rows_0_0, rows_bad_row1, rows_bad_group_okay, calc_rows_row2;
int
rows_bad() {
int i, in_zeroes;
char block;
i = 0;
for (; i < 5; i++)
if (rows_bad_row1 & i)
in_zeroes = 0;
else {
if (!in_zeroes)
in_zeroes = 1;
if (block & 1)
rows_bad_group_okay = 1;
}
if (in_zeroes)
return rows_bad_group_okay;
}
void
calc_rows() {
for (; calc_rows_row2; calc_rows_row2++) {
rows_bad();
bad_odd_rows_0_0 = rows_bad();
}
}
$ gcc meteor.c --param=max-unswitch-insns=1024 -O3 -mavx512vl -c
during GIMPLE pass: isel
meteor.c: In function ‘calc_rows’:
meteor.c:22:1: internal compiler error: in gimple_expand_vec_cond_expr, at
gimple-isel.cc:201
22 | calc_rows() {
| ^~~~~~~~~
0x72d8f5 gimple_expand_vec_cond_expr
/home/marxin/Programming/gcc/gcc/gimple-isel.cc:201
0xff19d0 gimple_expand_vec_exprs
/home/marxin/Programming/gcc/gcc/gimple-isel.cc:247
0xff19d0 execute
/home/marxin/Programming/gcc/gcc/gimple-isel.cc:300
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.
The problematic statement is:
(gdb) p debug_gimple_stmt(stmt)
mask__581.198_1001 = VEC_COND_EXPR <mask__258.180_254, { 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0 }, mask__649.184_117>;
(gdb) p mode
$3 = E_HImode
(gdb) p cmp_op_mode
$4 = E_V16SImode
