Ok. I prefer just keep scalar load + vmv.v.x by default since I believe most
machines
prefer this way.
juzhe.zh...@rivai.ai
From: Jeff Law
Date: 2023-05-31 06:09
To: 钟居哲; andrew; rdapp.gcc
CC: gcc-patches; kito.cheng; palmer
Subject: Re: [PATCH] RISC-V: Synthesize power-of-two constants.
I agree with Andrew.
And I don't think this patch is appropriate for following reasons:
1. This patch increases vector workload in machine since
it convert scalar load + vmv.v.x into vmv.v.i + vsll.vi.
2. For multi-issue OoO machine, scalar instructions are very cheap
when they are locat
