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Allow isize/usize in simd_cast

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This commit is contained in:
Caleb Zulawski 2021-12-28 04:06:01 +00:00
parent 399ba6bb37
commit d32ca64692
2 changed files with 37 additions and 4 deletions
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20
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -1715,14 +1715,26 @@ unsupported {} from `{}` with element `{}` of size `{}` to `{}`"#,
let (in_style, in_width) = match in_elem.kind() { let (in_style, in_width) = match in_elem.kind() {
// vectors of pointer-sized integers should've been // vectors of pointer-sized integers should've been
// disallowed before here, so this unwrap is safe. // disallowed before here, so this unwrap is safe.
ty::Int(i) => (Style::Int(true), i.bit_width().unwrap()), ty::Int(i) => (
ty::Uint(u) => (Style::Int(false), u.bit_width().unwrap()), Style::Int(true),
i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Uint(u) => (
Style::Int(false),
u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Float(f) => (Style::Float, f.bit_width()), ty::Float(f) => (Style::Float, f.bit_width()),
_ => (Style::Unsupported, 0), _ => (Style::Unsupported, 0),
}; };
let (out_style, out_width) = match out_elem.kind() { let (out_style, out_width) = match out_elem.kind() {
ty::Int(i) => (Style::Int(true), i.bit_width().unwrap()), ty::Int(i) => (
ty::Uint(u) => (Style::Int(false), u.bit_width().unwrap()), Style::Int(true),
i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Uint(u) => (
Style::Int(false),
u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Float(f) => (Style::Float, f.bit_width()), ty::Float(f) => (Style::Float, f.bit_width()),
_ => (Style::Unsupported, 0), _ => (Style::Unsupported, 0),
}; };

21
src/test/ui/simd/intrinsic/generic-cast-pointer-width.rs Normal file
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@ -0,0 +1,21 @@
// run-pass
#![feature(repr_simd, platform_intrinsics)]
extern "platform-intrinsic" {
fn simd_cast<T, U>(x: T) -> U;
}
#[derive(Copy, Clone)]
#[repr(simd)]
struct V<T>([T; 4]);
fn main() {
let u = V::<usize>([0, 1, 2, 3]);
let uu32: V<u32> = unsafe { simd_cast(u) };
let ui64: V<i64> = unsafe { simd_cast(u) };
for (u, (uu32, ui64)) in u.0.iter().zip(uu32.0.iter().zip(ui64.0.iter())) {
assert_eq!(*u as u32, *uu32);
assert_eq!(*u as i64, *ui64);
}
}