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| author | bors <bors@rust-lang.org> | 2024-01-25 05:16:53 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2024-01-25 05:16:53 +0000 |
| commit | 039d887928361df98ca530471b609378be93983a (patch) | |
| tree | a06e4735c666d23260c03f360fb45af94745ff53 /compiler/rustc_mir_transform/src/coverage/spans.rs | |
| parent | 68411c955458ffbc98649d6dd057c4be3b187f38 (diff) | |
| parent | 9dccd5dce11f2fcce81fc77f4271eaf2359e2626 (diff) | |
| download | rust-039d887928361df98ca530471b609378be93983a.tar.gz rust-039d887928361df98ca530471b609378be93983a.zip | |
Auto merge of #119911 - NCGThompson:is-statically-known, r=oli-obk
Replacement of #114390: Add new intrinsic `is_var_statically_known` and optimize pow for powers of two This adds a new intrinsic `is_val_statically_known` that lowers to [``@llvm.is.constant.*`](https://llvm.org/docs/LangRef.html#llvm-is-constant-intrinsic).` It also applies the intrinsic in the int_pow methods to recognize and optimize the idiom `2isize.pow(x)`. See #114390 for more discussion. While I have extended the scope of the power of two optimization from #114390, I haven't added any new uses for the intrinsic. That can be done in later pull requests. Note: When testing or using the library, be sure to use `--stage 1` or higher. Otherwise, the intrinsic will be a noop and the doctests will be skipped. If you are trying out edits, you may be interested in [`--keep-stage 0`](https://rustc-dev-guide.rust-lang.org/building/suggested.html#faster-builds-with---keep-stage). Fixes #47234 Resolves #114390 `@Centri3`
Diffstat (limited to 'compiler/rustc_mir_transform/src/coverage/spans.rs')
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