https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90530
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-reduction |
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-05-20
Ever confirmed|0 |1
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
There's a reduced test-case:
$ cat expmed.ii
void fancy_abort(const char *, int, const char *);
enum machine_mode {
E_QImode,
E_HImodeE_DImode,
E_TImode,
MIN_MODE_INT = E_QImode,
MAX_MODE_INT = E_TImode
};
template <typename U> void is_a(machine_mode, U);
class A {};
struct B {
bool cheap[2][MAX_MODE_INT + 1];
};
struct C {
int cost[2][MAX_MODE_INT + 1];
};
struct {
B x_sdiv_pow2_cheap;
B x_smod_pow2_cheap;
C x_udiv_cost;
} a;
bool *expmed_op_cheap_ptr(B *p1, bool p2, machine_mode p3) {
return &p1->cheap[p2][p3];
}
int *expmed_op_cost_ptr(C *p1, bool p2, machine_mode p3) {
return &p1->cost[p2][p3];
}
bool *b, *c;
int d;
machine_mode e;
void init_expmed() {
machine_mode f;
int g = 0;
for (;; g++) {
f = MIN_MODE_INT;
for (; f <= MAX_MODE_INT; f = machine_mode(f + 1)) {
int *h = expmed_op_cost_ptr(&(&a)->x_udiv_cost, g, f);
*h = d;
b = expmed_op_cheap_ptr(&(&a)->x_sdiv_pow2_cheap, g, f);
*b = (c = expmed_op_cheap_ptr(&(&a)->x_smod_pow2_cheap, g, f));
*c = 0;
A i;
is_a(f, i);
for (; e;)
fancy_abort("", 9, __FUNCTION__);
}
}
}
$ /dev/shm/objdir2/gcc/xgcc -B/dev/shm/objdir2/gcc/ -c expmed.ii -O2
expmed.ii: In function ‘void init_expmed()’:
expmed.ii:48:1: error: unrecognizable insn:
48 | }
| ^
(insn 177 176 178 2 (set (reg:SI 52 %fr24)
(subreg:SI (reg:DI 51 %fr23) 4)) -1
(nil))
during RTL pass: reload
expmed.ii:48:1: internal compiler error: in extract_insn, at recog.c:2310
0x52bc60 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:108
0x52bc7e _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/marxin/Programming/gcc/gcc/rtl-error.c:116
0x52baac extract_insn(rtx_insn*)
/home/marxin/Programming/gcc/gcc/recog.c:2310
0xa2b29d extract_insn_cached(rtx_insn*)
/home/marxin/Programming/gcc/gcc/recog.c:2199
0x82540a cleanup_subreg_operands(rtx_insn*)
/home/marxin/Programming/gcc/gcc/final.c:3313
0xa54a49 reload(rtx_insn*, int)
/home/marxin/Programming/gcc/gcc/reload1.c:1235
0x9259c0 do_reload
/home/marxin/Programming/gcc/gcc/ira.c:5528
0x9259c0 execute
/home/marxin/Programming/gcc/gcc/ira.c:5700
