https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120995
Bug ID: 120995
Summary: [RISC-V] ICE: unrecognizable insn
UNSPEC_COMPARE_AND_SWAP with rv64gc_zabha_zacas
Product: gcc
Version: 15.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sch...@linux-m68k.org
Target Milestone: ---
Target: riscv*-*-*
$ cat seeded_rng.i
_Bool atomic_bool_cmpxchg_v_0;
void atomic_bool_cmpxchg_old() {
__sync_bool_compare_and_swap(&atomic_bool_cmpxchg_v_0,
atomic_bool_cmpxchg_old, 0);
}
$ gcc/xgcc -B gcc/ -march=rv64gc_zabha_zacas -O2 -std=gnu11 -S seeded_rng.i
seeded_rng.i: In function ‘atomic_bool_cmpxchg_old’:
seeded_rng.i:5:1: error: unrecognizable insn:
5 | }
| ^
(insn 7 6 8 2 (parallel [
(set (reg:QI 136)
(mem/v:QI (lo_sum:DI (reg:DI 135)
(symbol_ref:DI ("atomic_bool_cmpxchg_v_0") [flags 0x86]
<var_decl 0x7f41a7bb9000 atomic_bool_cmpxchg_v_0>)) [-1 S1 A8]))
(set (mem/v:QI (lo_sum:DI (reg:DI 135)
(symbol_ref:DI ("atomic_bool_cmpxchg_v_0") [flags 0x86]
<var_decl 0x7f41a7bb9000 atomic_bool_cmpxchg_v_0>)) [-1 S1 A8])
(unspec_volatile:QI [
(reg:QI 138)
(const_int 0 [0])
(const_int 32773 [0x8005]) repeated x2
] UNSPEC_COMPARE_AND_SWAP))
]) "seeded_rng.i":3:3 -1
(nil))
during RTL pass: vregs
seeded_rng.i:5:1: internal compiler error: in extract_insn, at recog.cc:2882
