https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96755
Bug ID: 96755
Summary: ICE in final_scan_insn_1, at final.c:3073 with -O3
-march=skylake-avx512
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
>$ g++ -O3 -march=skylake-avx512 -c func.cpp
func.cpp: In function ‘void test(short unsigned int, unsigned char, long long
int)’:
func.cpp:13:1: error: could not split insn
13 | }
| ^
(insn 644 21 817 50 (set (reg:DI 70 k2 [orig:83 D.4406 ] [83])
(zero_extend:DI (not:SI (reg:SI 70 k2 [orig:505 b ] [505]))))
"func.cpp":10:18 622 {*one_cmplsi2_1_zext}
(nil))
during RTL pass: final
func.cpp:13:1: internal compiler error: in final_scan_insn_1, at final.c:3073
0x7cf5e7 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/gcc/rtl-error.c:108
0x75b978 final_scan_insn_1
/gcc/final.c:3073
0xd9b5cf final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/gcc/final.c:3152
0xd9b8c7 final_1
/gcc/final.c:2020
0xd9c298 rest_of_handle_final
/gcc/final.c:4658
0xd9c298 execute
/gcc/final.c:4736
Reproducer:
extern long var_22;
extern int arr_3[];
extern int arr_4[][20][9];
short a;
void test(unsigned short b, unsigned char e, long long g) {
for (long c = 0; c < 20ULL; c = g)
for (short d = 0; d < 9; d++)
for (char f = e; f < 8; f += 4) {
arr_3[f] = 0;
var_22 = ~(unsigned)b;
arr_4[c][d][f] = a;
}
}
gcc version 11.0.0 20200823 (87c753ac241f25d222d46ba1ac66ceba89d6a200)
