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Fix shuffle index constant not being monomorphized.

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This commit is contained in:
Caleb Zulawski 2021-09-16 02:59:49 +00:00
parent 1b3fe755ea
commit 4a4ca94151
2 changed files with 46 additions and 2 deletions
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8
compiler/rustc_codegen_ssa/src/mir/block.rs
View file

@ -665,8 +665,12 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
if i == 2 && intrinsic.as_str().starts_with("simd_shuffle") {
if let mir::Operand::Constant(constant) = arg {
let c = self.eval_mir_constant(constant);
let (llval, ty) =
self.simd_shuffle_indices(&bx, constant.span, constant.ty(), c);
let (llval, ty) = self.simd_shuffle_indices(
&bx,
constant.span,
self.monomorphize(constant.ty()),
c,
);
return OperandRef {
val: Immediate(llval),
layout: bx.layout_of(ty),

40
src/test/ui/simd/monomorphize-shuffle-index.rs Normal file
View file

@ -0,0 +1,40 @@
//run-pass
#![feature(repr_simd, platform_intrinsics)]
extern "platform-intrinsic" {
fn simd_shuffle<T, I, U>(a: T, b: T, i: I) -> U;
}
#[derive(Copy, Clone)]
#[repr(simd)]
struct Simd<T, const N: usize>([T; N]);
trait Shuffle<const N: usize> {
const I: [u32; N];
unsafe fn shuffle<T, const M: usize>(&self, a: Simd<T, M>, b: Simd<T, M>) -> Simd<T, N> {
simd_shuffle(a, b, Self::I)
}
}
fn main() {
struct I1;
impl Shuffle<4> for I1 {
const I: [u32; 4] = [0, 2, 4, 6];
}
struct I2;
impl Shuffle<2> for I2 {
const I: [u32; 2] = [1, 5];
}
let a = Simd::<u8, 4>([0, 1, 2, 3]);
let b = Simd::<u8, 4>([4, 5, 6, 7]);
unsafe {
let x: Simd<u8, 4> = I1.shuffle(a, b);
assert_eq!(x.0, [0, 2, 4, 6]);
let y: Simd<u8, 2> = I2.shuffle(a, b);
assert_eq!(y.0, [1, 5]);
}
}