[Bug target/112853] RISC-V: RVV: SPEC2017 525.x264 regression

[vineetg at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112853

--- Comment #2 from Vineet Gupta <vineetg at gcc dot gnu.org> ---
Bisected to

commit 97ddebb6b4f6b132b0a8072b26d030077b418963
Author: Juzhe-Zhong <juzhe.zh...@rivai.ai>
Date:   Thu Nov 23 18:55:03 2023 +0800

    RISC-V: Refine some codes of riscv-v.cc[NFC]

    This patch is NFC patch to refine unreasonable codes I notice.

    Tested on zvl128b/zvl256b/zvl512b/zvl1024b no regression.

    Committed.

    gcc/ChangeLog:

            * config/riscv/riscv-v.cc (emit_vlmax_gather_insn): Refine codes.
            (emit_vlmax_masked_gather_mu_insn): Ditto.
            (modulo_sel_indices): Ditto.
            (expand_vec_perm): Ditto.
            (shuffle_generic_patterns): Ditto.