test intrinsic fallback bodies with Miri #140903
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The Miri subtree was changed cc @rust-lang/miri |
WaffleLapkin
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May 11, 2025
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@bors r+ |
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Rollup of 7 pull requests Successful merges: - rust-lang#140792 (Use intrinsics for `{f16,f32,f64,f128}::{minimum,maximum}` operations) - rust-lang#140795 (Prefer to suggest stable candidates rather than unstable ones) - rust-lang#140865 (Make t letter looks like lowercase rather than uppercase) - rust-lang#140878 (Two expand-related cleanups) - rust-lang#140882 (Split duration_constructors to get non-controversial constructors out) - rust-lang#140886 (Update deps of bootstrap for Cygwin) - rust-lang#140903 (test intrinsic fallback bodies with Miri) r? `@ghost` `@rustbot` modify labels: rollup
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Something seems to have gone wrong, it doesn't look like it ran any tests in the CI run. |
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Rollup merge of rust-lang#140903 - RalfJung:fallback-body-tests, r=WaffleLapkin test intrinsic fallback bodies with Miri `@Urgau` noted in rust-lang#140792 that fallback bodies our backends don't use are untested... which is correct, and it is a problem. So this adds a testing-only flag to Miri to force the use of fallback bodies, and adds a run of the Miri test suite with that flag to CI. This should not take much more than a minute so I hope it's fine? Let's see how long it actually takes. While at it, I made that test run also enable MIR optimizations. Miri's CI has a run with that, and it has caught mir-opt bugs in the past -- this way we'd see the CI failure earlier. r? `@scottmcm`
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Damn, the rollup landed it.^^ Will post a follw-up... |
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Thanks for working on this! I'd be quite happy to remove the one-off testing for some of them in rust/library/core/src/intrinsics/fallback.rs Lines 3 to 5 in d97326e that I'd added, but not done consistently. |
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@Urgau noted in #140792 that fallback bodies our backends don't use are untested... which is correct, and it is a problem. So this adds a testing-only flag to Miri to force the use of fallback bodies, and adds a run of the Miri test suite with that flag to CI. This should not take much more than a minute so I hope it's fine? Let's see how long it actually takes.
While at it, I made that test run also enable MIR optimizations. Miri's CI has a run with that, and it has caught mir-opt bugs in the past -- this way we'd see the CI failure earlier.
r? @scottmcm