https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100757
Bug ID: 100757
Summary: arm: ICE (unrecognizable insn) with MVE VPSELQ_S
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
This appears to be a recent regression on the trunk:
$ gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=gcc/xgcc
Target: arm-eabi
Configured with: /home/alecop01/toolchain/src/gcc/configure
--prefix=/data_sdb/toolchain/cc1s/arm --enable-languages=c,c++
--disable-bootstrap --target=arm-eabi
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210525 (experimental) (GCC)
$ cat test.c
extern int a[];
int n;
void foo(int x, _Bool b) {
for (int i = 0; i < n; i++)
a[i] = x || b;
}
$ gcc/xgcc -B gcc -c test.c -march=armv8.1-m.main+mve -mfloat-abi=hard -O
-ftree-vectorize -mtune=cortex-a55
test.c: In function ‘foo’:
test.c:6:1: error: unrecognizable insn:
6 | }
| ^
(insn 44 43 45 6 (set (reg:V4SI 131 [ vect_patt_4.10 ])
(unspec:V4SI [
(reg:V4SI 149)
(reg:V4SI 150)
(reg:V4SI 148 [ mask__2.9 ])
] VPSELQ_S)) -1
(nil))
during RTL pass: vregs
test.c:6:1: internal compiler error: in extract_insn, at recog.c:2770
0x5e9fc6 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.c:108
0x5e9fe5 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.c:116
0xc770c7 extract_insn(rtx_insn*)
/home/alecop01/toolchain/src/gcc/gcc/recog.c:2770
0x9aa78a instantiate_virtual_regs_in_insn
/home/alecop01/toolchain/src/gcc/gcc/function.c:1609
0x9aa78a instantiate_virtual_regs
/home/alecop01/toolchain/src/gcc/gcc/function.c:1983
0x9aa78a execute
/home/alecop01/toolchain/src/gcc/gcc/function.c:2032
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.
