[Bug target/109535] [13/14] internal compiler error: in finalize_new_accesses, at rtl-ssa/changes.cc:471

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109535

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Kito Cheng <kito@gcc.gnu.org>:

https://gcc.gnu.org/g:a2d12abedc89a9439fd6aadc38730fdadca0684f

commit r14-113-ga2d12abedc89a9439fd6aadc38730fdadca0684f
Author: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
Date:   Wed Apr 19 18:41:51 2023 +0800

    RISC-V: Fix wrong check of register occurrences [PR109535]

    count_occurrences will conly count same RTX (same code and same mode),
    but what we want to track is the occurrence of a register, a register
    might appeared in the insn with different mode or contain in SUBREG.

    Testcase coming from Kito.

    gcc/ChangeLog:

            PR target/109535
            * config/riscv/riscv-vsetvl.cc (count_regno_occurrences): New
function.
            (pass_vsetvl::cleanup_insns): Fix bug.

    gcc/testsuite/ChangeLog:

            PR target/109535
            * g++.target/riscv/rvv/base/pr109535.C: New test.
            * gcc.target/riscv/rvv/base/pr109535.c: New test.

    Signed-off-by: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
    Co-authored-by: kito-cheng <kito.cheng@sifive.com>