https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128581
Bug ID: 128581
Summary: ICE: in extract_insn, at recog.cc:2896 unrecognizable
insn: (set (reg:RVVM1SI 134 [ b.0_1 ]) with
-mrvv-vector-bits=zvl
-fno-fuse-ops-with-volatile-access -mcpu=xt-c920
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 66120
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=66120&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -mrvv-vector-bits=zvl
-fno-fuse-ops-with-volatile-access -mcpu=xt-c920 testcase.c
testcase.c: In function 'foo':
testcase.c:1:71: error: unrecognizable insn:
1 | void foo() { volatile __attribute__((__vector_size__(16))) int b = b; }
| ^
(insn 6 5 7 2 (set (reg:RVVM1SI 134 [ b.0_1 ])
(mem/v/c:RVVM1SI (reg/f:DI 135) [1 b+0 S16 A128])) "testcase.c":1:64 -1
(nil))
during RTL pass: vregs
testcase.c:1:71: internal compiler error: in extract_insn, at recog.cc:2896
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
0xd32c8b _fatal_insn_not_found(rtx_insn const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0xd21dea extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2896
0x1633146 instantiate_virtual_regs_in_insn
/repo/gcc-trunk/gcc/function.cc:1690
0x1633146 instantiate_virtual_regs
/repo/gcc-trunk/gcc/function.cc:2066
0x1633146 execute
/repo/gcc-trunk/gcc/function.cc:2113
/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
-mrvv-vector-bits=zvl -mcpu=xt-c920
-march=rv64imafdc_zicntr_zihpm_zmmul_zaamo_zalrsc_zfh_zfhmin_zca_zcd_xtheadba_xtheadbb_xtheadbs_xtheadcmo_xtheadcondmov_xtheadfmemidx_xtheadmac_xtheadmemidx_xtheadmempair_xtheadsync_xtheadvector
-mabi=lp64d -misa-spec=2.2 -mtls-dialect=trad
-march=rv64imafdc_zicntr_zihpm_zmmul_zaamo_zalrsc_zfh_zfhmin_zca_zcd_xtheadba_xtheadbb_xtheadbs_xtheadcmo_xtheadcondmov_xtheadfmemidx_xtheadmac_xtheadmemidx_xtheadmempair_xtheadsync_xtheadvector
-fno-fuse-ops-with-volatile-access -o /tmp/ccH9QyMA.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)
