https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127484
Bug ID: 127484
Summary: [17 Regression] ICE: SIGSEGV (infinite recursion in
force_reg / force_reg / emit_move_insn /
emit_move_multi_word / operand_subword_force) with -O
-march=rv64gv -mabi=lp64
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 65633
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65633&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O -march=rv64gv -mabi=lp64 testcase.c
riscv64-unknown-linux-gnu-gcc: internal compiler error: cc1 terminated by
signal 11 (Segmentation fault)
Segmentation fault
/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc -O
-march=rv64gv -mabi=lp64 testcase.c
$ 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-20260918150049-r17-4418-gdb655b1fdce54a-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-20260918150049-r17-4418-gdb655b1fdce54a-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260918 (experimental) (GCC)
