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Re: [PATCH v4 22/33] target/nios2: Introduce dest_gpr


From: Richard Henderson
Subject: Re: [PATCH v4 22/33] target/nios2: Introduce dest_gpr
Date: Tue, 8 Mar 2022 10:53:15 -1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0

On 3/8/22 01:07, Peter Maydell wrote:
I assume the TCG dead-code elimination will mostly throw away the
write-to-R_ZERO stuff, but here for rdctl I suspect it won't.

I believe it will. We don't indicate that normal load has side effects (as opposed to guest load), so it should all fall out of unused values.

But probably real code doesn't do that kind of silly thing.

Indeed.


r~



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