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Tracking Issue for mir-inlining #81567

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oli-obk opened this issue Jan 30, 2021 · 1 comment
Open
4 of 5 tasks

Tracking Issue for mir-inlining #81567

oli-obk opened this issue Jan 30, 2021 · 1 comment
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A-mir-opt Area: MIR optimizations A-mir-opt-inlining Area: MIR inlining C-tracking-issue Category: A tracking issue for an RFC or an unstable feature.

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@oli-obk
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oli-obk commented Jan 30, 2021 •
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This is a tracking issue for the MIR inliner. You can currently enable it by passing -Zinline-mir or -Zmir-opt-level=3 to the compiler (although that also enables a bunch of other opts)

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

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Implementation history

cc @rust-lang/wg-mir-opt
@oli-obk oli-obk added C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. A-mir-opt Area: MIR optimizations A-mir-opt-inlining Area: MIR inlining labels Jan 30, 2021
@bjorn3 bjorn3 mentioned this issue Jan 31, 2021
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@cbeuw cbeuw mentioned this issue Sep 3, 2021
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@cjgillot cjgillot mentioned this issue Dec 10, 2021
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bors added a commit to rust-lang-ci/rust that referenced this issue Jul 2, 2022
@bors
Auto merge of rust-lang#91743 - cjgillot:enable_mir_inlining_inline_a…
0075bb4 
…ll, r=oli-obk

Enable MIR inlining

Continuation of rust-lang#82280 by `@wesleywiser.`

rust-lang#82280 has shown nice compile time wins could be obtained by enabling MIR inlining.
Most of the issues in rust-lang#81567 are now fixed,
except the interaction with polymorphization which is worked around specifically.

I believe we can proceed with enabling MIR inlining in the near future
(preferably just after beta branching, in case we discover new issues).

Steps before merging:
- [x] figure out the interaction with polymorphization;
- [x] figure out how miri should deal with extern types;
- [x] silence the extra arithmetic overflow warnings;
- [x] remove the codegen fulfilment ICE;
- [x] remove the type normalization ICEs while compiling nalgebra;
- [ ] tweak the inlining threshold.
@matthiaskrgr matthiaskrgr mentioned this issue Jul 2, 2022
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@bjorn3
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bjorn3 commented Jul 18, 2022

Since #91743 MIR inlining is enabled by default when optimizations are enabled.

@eduardosm eduardosm mentioned this issue Dec 4, 2022
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A-mir-opt Area: MIR optimizations A-mir-opt-inlining Area: MIR inlining C-tracking-issue Category: A tracking issue for an RFC or an unstable feature.
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