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)
