https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105624
Bug ID: 105624
Summary: [13 Regression] ICE in final_scan_insn_1, at
final.cc:2861 (error: could not split 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-pc-linux-gnu
gcc 13.0.0 20220515 snapshot (g:18547874ee205d830acb31f1e3c1c89fc7725c14) ICEs
when compiling the following testcase w/ -march=k8 -O1:
union U {
double d;
unsigned long long int i;
};
double
fabs (double x)
{
union U u;
u.d = x;
u.i &= ~0ULL >> 1;
return u.d;
}
% x86_64-pc-linux-gnu-gcc-13.0.0 -march=k8 -O1 -c ifnwa4ea.c
ifnwa4ea.c: In function 'fabs':
ifnwa4ea.c:15:1: error: could not split insn
15 | }
| ^
(insn 8 17 18 2 (parallel [
(set (reg:DI 0 ax [91])
(and:DI (reg:DI 0 ax [91])
(reg:DI 20 xmm0 [89])))
(clobber (reg:CC 17 flags))
]) "ifnwa4ea.c":14:11 530 {*anddi_1_btr}
(expr_list:REG_DEAD (reg:DI 20 xmm0 [89])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
during RTL pass: final
ifnwa4ea.c:15:1: internal compiler error: in final_scan_insn_1, at
final.cc:2861
0x73a629 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/rtl-error.cc:108
0x6c15f7 final_scan_insn_1
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/final.cc:2861
0xb6e51b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/final.cc:2940
0xb6e775 final_1
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/final.cc:1997
0xb6f351 rest_of_handle_final
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/final.cc:4285
0xb6f351 execute
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220515/work/gcc-13-20220515/gcc/final.cc:4363
