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authorMatthias Krüger <matthias.krueger@famsik.de>2024-08-02 06:43:43 +0200
committerGitHub <noreply@github.com>2024-08-02 06:43:43 +0200
commit67fcb58347c10e0cc047fa3e33108643593ab851 (patch)
treeda1b3d30502d584567c416ca253bd61f671a0da4 /compiler/rustc_codegen_llvm/src/errors.rs
parent2dabaa01aaffd39236e091217937e89c915a7aa3 (diff)
parentf97aba2271baf1876940b42cc68f1b60ac97bf98 (diff)
downloadrust-67fcb58347c10e0cc047fa3e33108643593ab851.tar.gz
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Rollup merge of #128453 - RalfJung:raw_eq, r=saethlin
raw_eq: using it on bytes with provenance is not UB (outside const-eval)

The current behavior of raw_eq violates provenance monotonicity. See https://github.com/rust-lang/rust/pull/124921 for an explanation of provenance monotonicity. It is violated in raw_eq because comparing bytes without provenance is well-defined, but adding provenance makes the operation UB.

So remove the no-provenance requirement from raw_eq. However, the requirement stays in-place for compile-time invocations of raw_eq, that indeed cannot deal with provenance.

Cc `@rust-lang/opsem`
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/errors.rs')
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