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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/115068] RISC-V: Illegal instruction of vfwadd
Date: Fri, 31 May 2024 20:36:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115068

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Robin Dapp <rdapp@gcc.gnu.org>:

https://gcc.gnu.org/g:a2fd0812a54cf51520f15e900df4cfb5874b75ed

commit r15-951-ga2fd0812a54cf51520f15e900df4cfb5874b75ed
Author: Robin Dapp <rdapp@ventanamicro.com>
Date:   Mon May 13 13:49:57 2024 +0200

    RISC-V: Do not allow v0 as dest when merging [PR115068].

    This patch splits the vfw...wf pattern so we do not emit e.g. vfwadd.wf
    v0,v8,fa5,v0.t anymore.

    gcc/ChangeLog:

            PR target/115068

            * config/riscv/vector.md:  Split vfw<insn>.wf pattern.

    gcc/testsuite/ChangeLog:

            * gcc.target/riscv/rvv/base/pr115068-run.c: New test.
            * gcc.target/riscv/rvv/base/pr115068.c: New test.=