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Re: [RFC PATCH v3 26/34] Hexagon (target/hexagon) macros referenced in i
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From: |
Richard Henderson |
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Subject: |
Re: [RFC PATCH v3 26/34] Hexagon (target/hexagon) macros referenced in instruction semantics |
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Date: |
Fri, 9 Oct 2020 07:59:29 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 10/8/20 3:54 PM, Taylor Simpson wrote:
> I'll reach out to the architects and ask if there is a case where doing the
> store first could be a problem - and also about the priority of exceptions.
Of course there are cases where doing the store first will cause problems.
> This may or may not be possible. We already have to reorder to put .new
> consumers after the producers, and we have to keep the change-of-flow
> instructions in the original order. So, I'm reluctant to go down this path
> worrying that there will be a long tail of corner case bugs to engineer out.
Well, do as you like, I suppose, but I think the merging thing that you were
trying to do is just as fraught with peril.
r~