No. Such pattern you pointed I already supported.
The operation is very simple.
Just use a single vmv.v.i but larger SEW is enough. No need vzext.



juzhe.zhong@rivai.ai
 
From: Robin Dapp
Date: 2023-06-12 22:43
To: juzhe.zhong; gcc-patches
CC: rdapp.gcc; kito.cheng; kito.cheng; palmer; palmer; jeffreyalaw
Subject: Re: [PATCH] RISC-V: Enhance RVV VLA SLP auto-vectorization with decompress operation
Hi Juzhe,
 
seems a nice improvement, looks good to me.  While reading I was wondering
if vzext could help synthesize some (zero-based) patterns as well
(e.g. 0 3 0 3...).
However the sequences I could come up with were not shorter than what we
are already emitting, so probably not.
 
Regards
Robin