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Enable AVR as a Tier 3 target upstream #69478

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merged 9 commits into from
Jun 12, 2020
Merged

Enable AVR as a Tier 3 target upstream #69478

merged 9 commits into from
Jun 12, 2020

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dylanmckay
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@dylanmckay dylanmckay commented Feb 26, 2020 •
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Tracking issue: #44052.

Things intentionally left out of the initial upstream:

  • The target_cpu flag

I have made the cleanup suggestions by @jplatte and @jplatte in avr-rust@043550d.

Anybody feel free to give the branch a test and see how it fares, or make suggestions on the code patch itself.

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r? @estebank

(rust_highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 26, 2020
@dylanmckay dylanmckay closed this Feb 26, 2020
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Dammit, meant to raise this on avr-rust/rust first, I always do this

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Actually, come to think of it, might as well keep it here for tracking.

Code reviews welcome, but let's hold off merging until some more testing has been done,

@dylanmckay dylanmckay reopened this Feb 26, 2020
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@dylanmckay dylanmckay changed the title Preliminary Pull Request: AVR support upstream WIP: Enable AVR as a Tier 3 target upstream Feb 26, 2020
@dylanmckay dylanmckay force-pushed the avr-support-upstream branch 2 times, most recently from 5d9b2ba to e3b36d7 Compare February 26, 2020 11:04
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added some commits almost 4 years ago

How time flies!

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@dylanmckay dylanmckay force-pushed the avr-support-upstream branch 2 times, most recently from 9522529 to 37b32f0 Compare March 3, 2020 06:38
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Any suggestions for where to put an AVR README or just AVR-specific documentation like build/usage instructions?

@dylanmckay dylanmckay mentioned this pull request Mar 3, 2020
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The only remaining failing automated test is related to name mangling, seems odd.

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shepmaster commented Mar 3, 2020 •
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We may need to re-bless the test output for the ABI failure tests (ui/feature-gates/feature-gate-abi-avr-interrupt.r)

@dylanmckay
[AVR] Re-bless the UI tests
e369cf6 
Patch generated with `./x.py test --stage 1 src/test/ui/feature-gates --bless`.
@dylanmckay
[AVR] Update the compiletest library to recognize AVR as a 16-bit target
b4a041c
@dylanmckay
[AVR] Remove AVR-specific logic from libstd
8ba9cbd 
It is not possible to compile libstd for AVR anyway.
@dylanmckay
[AVR] Rename the 'none_base' target spec module to 'freestanding_base'
1f0652f
@dylanmckay
[AVR] Update ABI type classification logic to match the the AVR-Clang…
0340359 
… ABI

This patch brings the AVR calling convention argument classification
logic in line with AVR Clang's behaviour.

AVR-Clang currently uses the `clang::DefaultABIInfo` ABI implementation.
This calling convention promotes all aggregates to indirect, no matter their
size.

It is also unnecessary to perform any integer width extension for AVR as
the minimum argument size matches the minimum describable size of
abi::Primitive::Int - 8 bits.

At some point in the future, an AVR-GCC compatible argument
classification implementation should be adopted in both Clang and Rust.
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Rebased, and the calling convention re-blessing removed from the git history.

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@bors r+

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bors commented Jun 9, 2020

📌 Commit 0340359 has been approved by jonas-schievink

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jun 9, 2020
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bors commented Jun 11, 2020

⌛ Testing commit 0340359 with merge 0b208d1125cca703f2f834db83a8a41988ffa813...

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@bors retry yield

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@bors p=1

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bors commented Jun 12, 2020

⌛ Testing commit 0340359 with merge e91bf6c...

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bors commented Jun 12, 2020

☀️ Test successful - checks-azure
Approved by: jonas-schievink
Pushing e91bf6c to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Jun 12, 2020
@bors bors merged commit e91bf6c into rust-lang:master Jun 12, 2020
This was referenced Jun 12, 2020
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I have made the cleanup suggestions by @jplatte and @jplatte in avr-rust/rust-legacy-fork@043550d.

(from the original post)

Typo?

@shepmaster shepmaster deleted the avr-support-upstream branch June 12, 2020 14:09
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jplatte commented Jun 12, 2020

@Restioson the wording of that commit is a bit weird, but I did make two suggestions, so it was likely intentional. (not meant to mention somebody else, at least).

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Ah, okay.

dylanmckay added a commit to dylanmckay/rust that referenced this pull request Jun 19, 2020
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[AVR] Re-bless the 'test/ui/symbol-names' tests
05e8729 
Adding a new ABI changes the hashes of all previous ABIs.

Fix suggested by @shepmaster in
rust-lang#69478 (comment).
@mati865 mati865 mentioned this pull request Sep 8, 2020
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merged-by-bors This PR was explicitly merged by bors. O-AVR Target: AVR processors (ATtiny, ATmega, etc.) relnotes Marks issues that should be documented in the release notes of the next release. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. WG-embedded Working group: Embedded systems
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