https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123870
--- Comment #40 from Ilya Kurdyukov <jpegqs at gmail dot com> --- Created attachment 63575 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63575&action=edit th_vmv2r.i.zip > 3. GCC 14.3.0 -O2, uses invalid th.vmv2r instruction for xtheadvector Originally this error was on -O2, but after some changes it is now reproduced only on -O0, because on gcc-14 -O2 now crashes with ICE (validate_change_or_fail), like gcc-15. You can run the same with -O2 and get another error. $ gcc-14 -O0 -march=rv64gc_xtheadvector th_vmv2r.i -c /tmp/cc2xrsCJ.s: Assembler messages: /tmp/cc2xrsCJ.s:9285: Error: unrecognized opcode `th.vmv2r.v v2,v4' $ gcc-14 -v Using built-in specs. COLLECT_GCC=gcc-14 COLLECT_LTO_WRAPPER=/usr/libexec/gcc/riscv64-linux-gnu/14/lto-wrapper Target: riscv64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 14.3.0-10' --with-bugurl=file:///usr/share/doc/gcc-14/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2,rust --prefix=/usr --with-gcc-major-version-only --program-suffix=-14 --program-prefix=riscv64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/libexec --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-libstdcxx-backtrace --enable-gnu-unique-object --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --disable-multilib --with-arch=rv64gc --with-abi=lp64d --enable-checking=release --build=riscv64-linux-gnu --host=riscv64-linux-gnu --target=riscv64-linux-gnu Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.3.0 (Debian 14.3.0-10)
