https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126269
Bug ID: 126269
Summary: ICE: in calculate_ratio, at
config/riscv/riscv-v.cc:916 with -Os -fwrapv
-march=rv64gv
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 65050
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65050&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -Os -fwrapv -march=rv64gv testcase.c
during RTL pass: vsetvl
testcase.c: In function 'foo':
testcase.c:17:1: internal compiler error: in calculate_ratio, at
config/riscv/riscv-v.cc:916
17 | }
| ^
0x388d19d internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0x11817fb fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0xdd1d07 riscv_vector::calculate_ratio(unsigned int, riscv_vector::vlmul_type)
/repo/gcc-trunk/gcc/config/riscv/riscv-v.cc:916
0x1f71b03 vsetvl_info::parse_insn(rtl_ssa::insn_info*)
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:1230
0x1f6c6df vsetvl_info::vsetvl_info(rtl_ssa::insn_info*)
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:974
0x1f6c6df pre_vsetvl::fuse_local_vsetvl_info()
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:3064
0x1f6f2da pass_vsetvl::lazy_vsetvl()
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:3969
0x1f6faca pass_vsetvl::execute(function*)
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:4038
0x1f6faca pass_vsetvl::execute(function*)
/repo/gcc-trunk/gcc/config/riscv/riscv-vsetvl.cc:4021
/repo/gcc-trunk/binary-trunk-20260714104339-r17-2390-gdeb5f74feeaf3a-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-20260714104339-r17-2390-gdeb5f74feeaf3a-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=rv64gv -mabi=lp64d -misa-spec=2.2 -mtls-dialect=trad
-march=rv64imafdv_zmmul_zaamo_zalrsc_zve32f_zve32x_zve64d_zve64f_zve64x_zvl128b_zvl32b_zvl64b
-Os -fwrapv -o /tmp/cczEH3d6.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-20260714104339-r17-2390-gdeb5f74feeaf3a-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
--enable-libsanitizer --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
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20260714104339-r17-2390-gdeb5f74feeaf3a-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260714 (experimental) (GCC)
