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updating-llvm: keep a calm tone #1449

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Nov 20, 2022
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updating-llvm: keep a calm tone #1449

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updating-llvm: keep a calm tone
tshepang Aug 27, 2022
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tshepang Nov 20, 2022
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tshepang Nov 20, 2022
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23 changes: 9 additions & 14 deletions src/backend/updating-llvm.md
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Expand Up @@ -2,20 +2,15 @@

<!-- toc -->

The Rust compiler uses LLVM as its primary codegen backend today, and naturally
we want to at least occasionally update this dependency! Currently we do not
have a strict policy about when to update LLVM or what it can be updated to, but
a few guidelines are applied:

* We try to always support the latest released version of LLVM
* We try to support the "last few" versions of LLVM (how many is changing over
time)
* We allow moving to arbitrary commits during development.
* Strongly prefer to upstream all patches to LLVM before including them in
rustc.

This policy may change over time (or may actually start to exist as a formal
policy!), but for now these are rough guidelines!
Comment on lines -17 to -18
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Why did you remove this sentence? This caution looks useful to me.

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It's basically repeated, so I keep it in one place... see line 6 of new changes.

<!-- date-check: Aug 2022 -->
There is no formal policy about when to update LLVM or what it can be updated to,
but a few guidelines are applied:

* We try to always support the latest released version
* We try to support the last few versions of LLVM
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(and the number changes over time)
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@JohnTitor JohnTitor Aug 31, 2022 •
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The former removed "of LLVM" whereas the latter keeps it, it's inconsistent (I mean, we don't have to remove the "of LLVM").

* We allow moving to arbitrary commits during development
* We Strongly prefer to upstream all patches to LLVM before including them in rustc
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## Why update LLVM?

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