Organize intrinsics promotion checks #66275
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The code LGTM, but please add some more comments as indicated in my comments above. |
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Certainly not in this PR, this just fixes our existing checks.
They are both already implemented in Miri, so this is just a matter of moving that implementation into rustc. The main issue here is that these are unsafe, and we are currently not yet willing to provide unsafe operations in |
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rebased and added FIXME @bors r=RalfJung |
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📌 Commit 5cef094 has been approved by |
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…r=RalfJung Organize intrinsics promotion checks cc @vertexclique supersedes #61835 r? @RalfJung
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☀️ Test successful - checks-azure |
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Tested on commit rust-lang/rust@7fa0465. Direct link to PR: <rust-lang/rust#66275> 💔 miri on windows: test-pass → test-fail (cc @oli-obk @eddyb @RalfJung, @rust-lang/infra). 💔 miri on linux: test-pass → test-fail (cc @oli-obk @eddyb @RalfJung, @rust-lang/infra).
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Ah dang, we finally got Miri in shape for the next nightly... |
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Most of these have to be deleted; the various power_of_two functions use `intrinsics::ctlz_nonzero` internally, so they can't be made const before rust-lang#66275 is merged.
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Most of the tests had to be deleted; the various power_of_two functions use `intrinsics::ctlz_nonzero` internally, so they can't be made const before rust-lang#66275 is merged.
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cc @vertexclique
supersedes #61835
r? @RalfJung