https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112740
Bug ID: 112740 Summary: [14 Regression] wrong code with vector compare on riscv64 at -O0 Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: wrong-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 56704 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56704&action=edit reduced testcase Output: $ riscv64-unknown-linux-gnu-gcc testcase.c -static $ qemu-riscv64 -- ./a.out Aborted "x" is "ffff...ffff" instead of 0 I am using qemu userspace emulation, so this might be a false positive: $ qemu-riscv64 -version qemu-riscv64 version 8.1.3 Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers $ 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-r14-5898-20231127211931-gce52f1f7074-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/14.0.0/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-cloog --with-ppl --with-isl --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-r14-5898-20231127211931-gce52f1f7074-checking-yes-rtl-df-extra-riscv64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.0 20231128 (experimental) (GCC)