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From: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
Date: Mon, 29 Aug 2022 11:38:23 +0530
Message-ID: <CAAgBjMnUJjvBMOowo_mCWeBXWuX4qhq4eOfO=v9_yn9duGsrhA@mail.gmail.com>
Subject: Re: Extend fold_vec_perm to fold VEC_PERM_EXPR in VLA manner
To: gcc Patches <gcc-patches@gcc.gnu.org>, Richard Biener <richard.guenther@gmail.com>, 
	Richard Sandiford <richard.sandiford@arm.com>
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On Wed, 17 Aug 2022 at 18:09, Prathamesh Kulkarni
<prathamesh.kulkarni@linaro.org> wrote:
>
> Hi,
> The attached prototype patch extends fold_vec_perm to fold VEC_PERM_EXPR
> in VLA manner, and currently handles the following cases:
> (a) fixed len arg0, arg1 and fixed len sel.
> (b) fixed len arg0, arg1 and vla sel
> (c) vla arg0, arg1 and vla sel with arg0, arg1 being VECTOR_CST.
>
> It seems to work for the VLA tests written in
> test_vec_perm_vla_folding (), and am working thru the fallout observed in
> regression testing.
>
> Does the approach taken in the patch look in the right direction ?
> I am not sure if I have got the conversion from "sel_index"
> to index of either arg0, or arg1 entirely correct.
> I would be grateful for suggestions on the patch.
ping https://gcc.gnu.org/pipermail/gcc-patches/2022-August/599888.html

Thanks,
Prathamesh
>
> Thanks,
> Prathamesh