https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120659
Bug ID: 120659
Summary: ICE: in riscv_sched_variable_issue, at
config/riscv/riscv.cc:9879 with -O2 -mcpu=sifive-x280
Product: gcc
Version: 16.0
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 61642
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61642&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O2 -mcpu=sifive-x280 testcase.c
during RTL pass: sched1
testcase.c: In function 'foo':
testcase.c:2:22: internal compiler error: in riscv_sched_variable_issue, at
config/riscv/riscv.cc:10111
2 | void foo() { f /= 3; }
| ^
0x31052c1 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0xf8a2af fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1803
0xc93380 riscv_sched_variable_issue
/repo/gcc-trunk/gcc/config/riscv/riscv.cc:10111
0xc93380 riscv_sched_variable_issue
/repo/gcc-trunk/gcc/config/riscv/riscv.cc:10091
0x2e7ea8a schedule_block(basic_block_def**, void*)
/repo/gcc-trunk/gcc/haifa-sched.cc:6928
0x17331fa schedule_region
/repo/gcc-trunk/gcc/sched-rgn.cc:3213
0x17331fa schedule_insns()
/repo/gcc-trunk/gcc/sched-rgn.cc:3535
0x173363c schedule_insns()
/repo/gcc-trunk/gcc/sched-rgn.cc:3521
0x173363c rest_of_handle_sched
/repo/gcc-trunk/gcc/sched-rgn.cc:3739
0x173363c execute
/repo/gcc-trunk/gcc/sched-rgn.cc:3849
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-20250615095650-r16-1515-gafe3401f2e73e2-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/16.0.0/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-20250615095650-r16-1515-gafe3401f2e73e2-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20250615 (experimental) (GCC)
