rust/src/test/codegen/slice-reverse.rs, branch beta

rust/src/test/codegen/slice-reverse.rs, branch beta https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=beta 2023-01-11T09:32:08+00:00 Move /src/test to /tests 2023-01-11T09:32:08+00:00 Albert Larsan 74931857+albertlarsan68@users.noreply.github.com 2023-01-05T08:13:28+00:00 urn:sha1:cf2dff2b1e3fa55fa5415d524200070d0d7aacfe Don't run the codegen test when `debug_assert` is enabled 2021-11-15T00:24:31+00:00 Scott McMurray scottmcm@users.noreply.github.com 2021-11-15T00:24:31+00:00 urn:sha1:f541dd13f17fd41800c65019e7d133a0a8e63370 MIRI says `reverse` is UB, so replace it with an implementation that LLVM can vectorize 2021-11-12T04:32:18+00:00 Scott McMurray scottmcm@users.noreply.github.com 2021-11-12T04:32:18+00:00 urn:sha1:71f5cfb21f3fd2f1740bced061c66ff112fec259 For small types with padding, the current implementation is UB because it does integer operations on uninit values. But LLVM has gotten smarter since I wrote the previous implementation in 2017, so remove all the manual magic and just write it in such a way that LLVM will vectorize. This code is much simpler (albeit nuanced) and has very little `unsafe`, and is actually faster to boot!