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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/109535] [13 regression] internal compiler error: in
 finalize_new_accesses, at rtl-ssa/changes.cc:471
Date: Thu, 04 May 2023 03:22:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109535

--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Kito Cheng <kito@gcc.gnu.org=
>:

https://gcc.gnu.org/g:5821f378b58443e21c77c0f8c673067fc7655fcb

commit r13-7285-g5821f378b58443e21c77c0f8c673067fc7655fcb
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>
    (cherry picked from commit a2d12abedc89a9439fd6aadc38730fdadca0684f)=