https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121599
Bug ID: 121599
Summary: [15/16 Regression] ICE (unrecognizable insn) with SVE2
saturating add intrinsics
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
The following fails:
$ cat t.c
#include <arm_sve.h>
svuint8_t foo(svbool_t j, svuint8_t g, uint8_t e, svint8_t c) {
return svsqadd_u8_z(j, g, svuqadd_n_s8_z(svpfalse(), c, e));
}
$ gcc/xgcc -B gcc -c t.c -S -o /dev/null -O2 -march=armv8.2-a+sve2
t.c: In function ‘foo’:
t.c:5:1: error: unrecognizable insn:
5 | }
| ^
(insn 10 9 14 2 (set (reg:VNx16QI 101 [ <retval> ])
(unspec:VNx16QI [
(reg/v:VNx16BI 102 [ j ])
(unspec:VNx16QI [
(const_vector:VNx16QI repeat [
(const_int -1 [0xffffffffffffffff])
])
(unspec:VNx16QI [
(reg/v:VNx16QI 103 [ g ])
(reg:VNx16QI 106)
] UNSPEC_USQADD)
] UNSPEC_PRED_X)
(reg:VNx16QI 106)
] UNSPEC_SEL)) "t.c":4:10 discrim 1 -1
(nil))
during RTL pass: vregs
t.c:5:1: internal compiler error: in extract_insn, at recog.cc:2884
0x232d8cb internal_error(char const*, ...)
/home/alecop01/toolchain/src/gcc/gcc/diagnostic-global-context.cc:534
0x8092df fancy_abort(char const*, int, char const*)
/home/alecop01/toolchain/src/gcc/gcc/diagnostics/context.cc:1687
0x7e857f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.cc:108
0x7e85b3 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/alecop01/toolchain/src/gcc/gcc/rtl-error.cc:116
0xfa110b extract_insn(rtx_insn*)
/home/alecop01/toolchain/src/gcc/gcc/recog.cc:2884
0xbf5087 instantiate_virtual_regs_in_insn
/home/alecop01/toolchain/src/gcc/gcc/function.cc:1609
0xbf5087 instantiate_virtual_regs
/home/alecop01/toolchain/src/gcc/gcc/function.cc:1985
0xbf5087 execute
/home/alecop01/toolchain/src/gcc/gcc/function.cc:2032
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
