https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105911
Bug ID: 105911
Summary: [13 Regression] ICE: in extract_insn, at recog.cc:2791
(error: unrecognizable insn)
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc 13.0.0 20220605 snapshot (g:ad6919374beafac4ec1a2f8059620f261019b02f) ICEs
when compiling the following testcase w/ -O1:
__int128 v;
void
bar (__int128, __int128);
void
foo (void)
{
bar (v /= v, v >> (v &= 0x100000001));
}
% x86_64-unknown-linux-gnu-gcc-13.0.0 -O1 yhk2zj2p.c
yhk2zj2p.c: In function 'foo':
yhk2zj2p.c:10:1: error: unrecognizable insn:
10 | }
| ^
(insn 20 8 21 2 (parallel [
(set (reg:DI 94)
(and:DI (subreg:DI (reg:TI 82 [ v.0_1 ]) 0)
(const_int 4294967297 [0x100000001])))
(clobber (reg:CC 17 flags))
]) "yhk2zj2p.c":9:3 -1
(nil))
during RTL pass: subreg3
yhk2zj2p.c:10:1: internal compiler error: in extract_insn, at recog.cc:2791
0x7258ef _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220605/work/gcc-13-20220605/gcc/rtl-error.cc:108
0x72590b _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220605/work/gcc-13-20220605/gcc/rtl-error.cc:116
0x723f05 extract_insn(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220605/work/gcc-13-20220605/gcc/recog.cc:2791
0x1dbab37 decompose_multiword_subregs
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220605/work/gcc-13-20220605/gcc/lower-subreg.cc:1555
0x1dbbafd execute
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220605/work/gcc-13-20220605/gcc/lower-subreg.cc:1818
