Josh Stone 5365b3f7be Avoid superfluous UB checks in IndexRange ...

`IndexRange::len` is justified as an overall invariant, and
`take_prefix` and `take_suffix` are justified by local branch
conditions. A few more UB-checked calls remain in cases that are only
supported locally by `debug_assert!`, which won't do anything in
distributed builds, so those UB checks may still be useful.

We generally expect core's `#![rustc_preserve_ub_checks]` to optimize
away in user's release builds, but the mere presence of that extra code
can sometimes inhibit optimization, as seen in #131563.

2024-10-11 16:22:43 -07:00

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auxiliary

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issue-13018.rs

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issue-15953.rs

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issue-27130.rs

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issue-32031.rs

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issue-32364.rs

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issue-34634.rs

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issue-34947-pow-i32.rs

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issue-36010-some-box-is_some.rs

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issue-37945.rs

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issue-45222.rs

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issue-45466.rs

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issue-45964-bounds-check-slice-pos.rs

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issue-47278.rs

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issue-47442.rs

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issue-56267-2.rs

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issue-56267.rs

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issue-56927.rs

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issue-58881.rs

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issue-59352.rs

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issue-68667-unwrap-combinators.rs

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issue-69101-bounds-check.rs

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issue-73031.rs

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issue-73258.rs

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issue-73338-effecient-cmp.rs

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issue-73396-bounds-check-after-position.rs

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issue-73827-bounds-check-index-in-subexpr.rs

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issue-74938-array-split-at.rs

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issue-75525-bounds-checks.rs

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issue-75546.rs

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issue-75659.rs

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issue-75978.rs

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issue-77812.rs

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issue-81408-dllimport-thinlto-windows.rs

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issue-84268.rs

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issue-85872-multiple-reverse.rs

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issue-86106.rs

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issue-93036-assert-index.rs

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issue-96274.rs

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issue-96497-slice-size-nowrap.rs

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issue-98156-const-arg-temp-lifetime.rs

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issue-98294-get-mut-copy-from-slice-opt.rs

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issue-99960.rs

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issue-101048.rs

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issue-101082.rs

Avoid superfluous UB checks in IndexRange

2024-10-11 16:22:43 -07:00

issue-101814.rs

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issue-103132.rs

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issue-103285-ptr-addr-overflow-check.rs

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issue-103327.rs

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issue-103840.rs

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issue-105386-ub-in-debuginfo.rs

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issue-106369.rs

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issue-107681-unwrap_unchecked.rs

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issue-109328-split_first.rs

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issue-110797-enum-jump-same.rs

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issue-111603.rs

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issue-112509-slice-get-andthen-get.rs

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issue-113757-bounds-check-after-cmp-max.rs

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issue-114312.rs

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issue-115385-llvm-jump-threading.rs

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issue-116878.rs

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issue-118306.rs

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issue-118392.rs

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issue-119422.rs

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issue-121719-common-field-offset.rs

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issue-122600-ptr-discriminant-update.rs

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issue-122805.rs

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issue-123712-str-to-lower-autovectorization.rs

Improve autovectorization of to_lowercase / to_uppercase functions

2024-09-23 11:31:29 +02:00

issue-126585.rs

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str-to-string-128690.rs

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