https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128579
Bug ID: 128579
Summary: [17 Regression] ICE: in extract_constrain_insn, at
recog.cc:2797 insn does not satisfy its constraints:
{pred_single_widen_adduv2hi}
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: riscv64-unknown-linux-gnu
Created attachment 66118
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=66118&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O -march=rv64gcv -mabi=lp64d testcase.c
testcase.c: In function 'foo':
testcase.c:12:1: error: insn does not satisfy its constraints:
12 | }
| ^
(insn 54 68 73 2 (set (reg/v:V2HI 97 v1 [orig:138 <retval> ] [138])
(if_then_else:V2HI (unspec:V2BI [
(const_vector:V2BI [
(const_int 1 [0x1]) repeated x2
])
(const_int 2 [0x2]) repeated x4
(reg:SI 66 vl)
(reg:SI 67 vtype)
] UNSPEC_VPREDICATE)
(plus:V2HI (zero_extend:V2HI (reg:V2QI 97 v1 [orig:147 _7 ] [147]))
(reg:V2HI 98 v2 [167]))
(unspec:V2HI [
(reg:DI 0 zero)
] UNSPEC_VUNDEF))) "testcase.c":9:5 11659
{pred_single_widen_adduv2hi}
(nil))
during RTL pass: reload
testcase.c:12:1: internal compiler error: in extract_constrain_insn, at
recog.cc:2797
0x3c1cff9 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0x12256b7 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0xd32c0e _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0xd32c95 _fatal_insn_not_found(rtx_insn const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:118
0xd239b4 extract_constrain_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2797
0x1880724 check_rtl
/repo/gcc-trunk/gcc/lra.cc:2246
0x188633a lra(_IO_FILE*, int)
/repo/gcc-trunk/gcc/lra.cc:2698
0x182a9af do_reload
/repo/gcc-trunk/gcc/ira.cc:6097
0x182a9af execute
/repo/gcc-trunk/gcc/ira.cc:6285
/repo/gcc-trunk/binary-trunk-20261109120833-g9adb420e482-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/17.0.0/cc1
-quiet -imultilib . -iprefix
/repo/gcc-trunk/binary-trunk-20261109120833-g9adb420e482-checking-yes-rtl-df-extra-riscv64/bin/../lib/gcc/riscv64-unknown-linux-gnu/17.0.0/
testcase.c -quiet -dumpdir a- -dumpbase testcase.c -dumpbase-ext .c
-march=rv64gcv -mabi=lp64d -misa-spec=2.2 -mtls-dialect=trad
-march=rv64imafdcv_zmmul_zaamo_zalrsc_zca_zcd_zve32f_zve32x_zve64d_zve64f_zve64x_zvl128b_zvl32b_zvl64b
-O -o /tmp/cc7RIdwl.s
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.
$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20261109120833-g9adb420e482-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/17.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-isa-spec=2.2 --with-sysroot=/usr/riscv64-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--enable-libsanitizer --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20261109120833-g9adb420e482-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20261109 (experimental) (GCC)
