rust/compiler/rustc_span
bors 9136560d32 Auto merge of #115933 - oli-obk:simd_shuffle_const, r=workingjubilee
Prototype using const generic for simd_shuffle IDX array

cc https://github.com/rust-lang/rust/issues/85229

r? `@workingjubilee` on the design

TLDR: there is now a `fn simd_shuffle_generic<T, U, const IDX: &'static [u32]>(x: T, y: T) -> U;` intrinsic that allows replacing

```rust
simd_shuffle(a, b, const { stuff })
```

with

```rust
simd_shuffle_generic::<_, _, {&stuff}>(a, b)
```

which makes the compiler implementations much simpler, if we manage to at some point eliminate `simd_shuffle`.

There are some issues with this today though (can't do math without bubbling it up in the generic arguments). With this change, we can start porting the simple cases and get better data on the others.
2023-09-30 04:05:26 +00:00
..
src Auto merge of #115933 - oli-obk:simd_shuffle_const, r=workingjubilee 2023-09-30 04:05:26 +00:00
Cargo.toml Upgrade to indexmap 2.0.0 2023-07-03 13:51:54 -07:00