[Bug target/112598] RISC-V regression testsuite errors with rv64gcv_zvl512b

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112598

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Pan Li <panli@gcc.gnu.org>:

https://gcc.gnu.org/g:de6f3e12bd188fee30bc79a5e323e16e0dbbe8ca

commit r14-5755-gde6f3e12bd188fee30bc79a5e323e16e0dbbe8ca
Author: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Date:   Wed Nov 22 18:53:22 2023 +0800

    RISC-V: Fix incorrect use of vcompress in permutation auto-vectorization

    This patch fixes following FAILs on zvl512b of RV32 system:

    FAIL: gcc.target/riscv/rvv/autovec/struct/struct_vect_run-12.c execution
test
    FAIL: gcc.target/riscv/rvv/autovec/struct/struct_vect_run-9.c execution
test

    The root cause is that for permutation indice = {0,3,7,0} use vcompress
optimization
    which is incorrect. Fix vcompress optimization bug.

            PR target/112598

    gcc/ChangeLog:

            * config/riscv/riscv-v.cc (shuffle_compress_patterns): Fix
vcompress bug.

    gcc/testsuite/ChangeLog:

            * gcc.target/riscv/rvv/autovec/pr112598-3.c: New test.