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fiigii

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If you’ve done serious compiler optimization work on a product with a sufficiently large user base, you’ve almost certainly seen bug reports like this:

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@fiigii In our case, it's also often just blocked by the memory model requirements.

@fiigii In our case, it's also often just blocked by the memory model requirements.

Properties5
typearchive
sourcetwitter
date2026-08-26
tagsarchive, twitter, fiigii
description@fiigii In our case, it's also often just blocked by the memory model requirements.

Aug 26, 20261 min read

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  • URL: https://x.com/EgorBo/status/2092617152461173205
  • Author: EgorBo (@EgorBo)
  • Posted: 2026-08-26 14:16:22

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1/ @EgorBo

@fiigii

In our case, it’s also often just blocked by the memory model requirements. Why can’t you perform these two stores via SLP? Well, because the alignment is unknown in this case and the memory model requires atomic assignments.

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  • If you’ve done serious compiler optimization work on a product with a sufficiently large user base, you’ve almost certainly seen bug reports like this:

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