a5cc1f663f
Use `unchecked_sub` in `split_at` LLVM currently isn't figuring it out on its own, even in the checked version where it hypothetically could. Before: <https://rust.godbolt.org/z/PEY38YrKs> ```llvm bb1: ; preds = %start %4 = getelementptr inbounds float, ptr %x.0, i64 %n %5 = sub i64 %x.1, %n ``` After: ```llvm bb1: ; preds = %start %4 = getelementptr inbounds float, ptr %x.0, i64 %n %5 = sub nuw i64 %x.1, %n ``` This is not using the wrapper because there's already a ubcheck covering it, so I don't want this to get a second one once #121571 lands. --- This is basically the same as #108763, since `split_at` is essentially doing two `get_unchecked`s. |
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| alloc | ||
| backtrace@e151306182 | ||
| core | ||
| panic_abort | ||
| panic_unwind | ||
| portable-simd | ||
| proc_macro | ||
| profiler_builtins | ||
| rtstartup | ||
| rustc-std-workspace-alloc | ||
| rustc-std-workspace-core | ||
| rustc-std-workspace-std | ||
| std | ||
| stdarch@c0257c1660 | ||
| sysroot | ||
| test | ||
| unwind | ||