Avoid overflow in GVN constant indexing. #119052
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r? @wesleywiser (rustbot has picked a reviewer for you, use r? to override) |
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
| from_end: false, | ||
| }; | ||
| projection.to_mut()[i] = | ||
| ProjectionElem::ConstantIndex { offset, min_length, from_end: false }; |
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Do you know why ConstantIndex stores min_length instead of, e.g., the "max index" of the last value?
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Well I guess it doesn't make sense to index at usize::MAX anyways.
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min_length comes from slice match. I supposed it's easier to compute from the length of the pattern.
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Dec 17, 2023
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@bors r+ rollup |
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…iaskrgr Rollup of 4 pull requests Successful merges: - rust-lang#118880 (More expressions correctly are marked to end with curly braces) - rust-lang#118928 (fix: Overlapping spans in delimited meta-vars) - rust-lang#119022 (Remove unnecessary constness from ProjectionCandidate) - rust-lang#119052 (Avoid overflow in GVN constant indexing.) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#119052 - cjgillot:gvn-index-overflow, r=compiler-errors Avoid overflow in GVN constant indexing. Fixes rust-lang#118992 Fixes rust-lang#119008
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Fixes #118992
Fixes #119008