https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97701
Bug ID: 97701
Summary: [10/11 Regression] aarch64: ICE in
extract_constrain_insn since r10-4447-g095f78c6
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
For the following testcase:
extern char a[][12][18][17][17];
extern short b[][12][18][17][17];
extern int c[][2][8][7];
short *d;
void e(signed f, int g, char h, char i, char j) {
for (int k = 648; k; k += f)
for (short l; l < j; l += 9)
for (long m = f + 6LL; m < (h ? h : i); m += 2)
for (int n = 0; n < 16; n += 3LL) {
for (int o = g; o; o++)
a[k][l][m][n][o] = b[k][l][m][n][o] = d[k] ? 2 : 0;
c[k][l][m][0] = 0;
}
}
AArch64 GCC ICEs at -O3 since
r10-4447-g095f78c62157124ad479a3f98b6995ced090b807. To reproduce:
$ aarch64-elf-gcc -c test.c -O3
test.c: In function 'e':
test.c:14:1: error: insn does not satisfy its constraints:
14 | }
| ^
(insn 2496 2495 2497 5 (set (reg:DI 32 v0 [1415])
(lo_sum:DI (reg:DI 6 x6 [1416])
(symbol_ref/u:DI ("*.LC0") [flags 0x82]))) 1007 {add_losym_di}
(nil))
during RTL pass: reload
test.c:14:1: internal compiler error: in extract_constrain_insn, at
recog.c:2212
0xd1ab2f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.c:108
0xd1ab60 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.c:118
0xcec957 extract_constrain_insn(rtx_insn*)
/home/alecop01/toolchain/src/gcc/gcc/recog.c:2212
0xbbe58d check_rtl
/home/alecop01/toolchain/src/gcc/gcc/lra.c:2038
0xbc3451 lra(_IO_FILE*)
/home/alecop01/toolchain/src/gcc/gcc/lra.c:2447
0xb76cff do_reload
/home/alecop01/toolchain/src/gcc/gcc/ira.c:5725
0xb76cff execute
/home/alecop01/toolchain/src/gcc/gcc/ira.c:5911
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
