user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add test for simd from array repeat codegen

Browse source
This commit is contained in:
Folkert de Vries 2026-01-30 17:50:52 +01:00
parent 55407b8cdb
commit ef7a7809c7
No known key found for this signature in database
GPG key ID: 1F17F6FFD112B97C
1 changed files with 40 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

40
tests/codegen-llvm/simd/array-repeat.rs Normal file
View file

@ -0,0 +1,40 @@
//@ add-minicore
//@ revisions: X86 AARCH64 RISCV S390X
//@ [X86] compile-flags: -Copt-level=3 --target=x86_64-unknown-linux-gnu
//@ [X86] needs-llvm-components: x86
//@ [AARCH64] compile-flags: -Copt-level=3 --target=aarch64-unknown-linux-gnu
//@ [AARCH64] needs-llvm-components: aarch64
//@ [RISCV] compile-flags: -Copt-level=3 --target riscv64gc-unknown-linux-gnu -Ctarget-feature=+v
//@ [RISCV] needs-llvm-components: riscv
//@ [S390X] compile-flags: -Copt-level=3 --target s390x-unknown-linux-gnu -Ctarget-feature=+vector
//@ [S390X] needs-llvm-components: systemz
#![crate_type = "lib"]
#![feature(repr_simd)]
#![feature(no_core)]
#![no_std]
#![no_core]
extern crate minicore;
use minicore::*;
#[repr(simd)]
pub struct Simd<T, const N: usize>(pub [T; N]);
pub type u8x16 = Simd<u8, 16>;
// Regression test for https://github.com/rust-lang/rust/issues/97804.
#[unsafe(no_mangle)]
fn foo(v: u16, p: &mut [u8; 16]) {
// An array repeat transmuted into a SIMD type should emit a canonical LLVM splat sequence:
//
// CHECK-LABEL: foo
// CHECK: start
// CHECK-NEXT: %0 = insertelement <8 x i16> poison, i16 %v, i64 0
// CHECK-NEXT: %1 = shufflevector <8 x i16> %0, <8 x i16> poison, <8 x i32> zeroinitializer
// CHECK-NEXT: store <8 x i16> %1, ptr %p, align 1
// CHECK-NEXT: ret void
unsafe {
let v: u8x16 = mem::transmute([v; 8]);
*p = mem::transmute(v);
}
}