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Add the test case for #122805

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DianQK 2024-04-06 22:16:10 +08:00
parent 87519b258c
commit 5acfe772fa
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tests/codegen/issues/issue-122805.rs Normal file
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//@ compile-flags: -O
//@ min-llvm-version: 18.1.3
#![crate_type = "lib"]
#![no_std]
// The code is from https://github.com/rust-lang/rust/issues/122805.
// Ensure we do not generate the shufflevector instruction
// to avoid complicating the code.
// CHECK-LABEL: define{{.*}}void @convert(
// CHECK-NOT: shufflevector
// CHECK: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: insertelement <8 x i16>
// CHECK-NEXT: store <8 x i16>
// CHECK-NEXT: ret void
#[no_mangle]
pub fn convert(value: [u16; 8]) -> [u8; 16] {
let addr16 = [
value[0].to_be(),
value[1].to_be(),
value[2].to_be(),
value[3].to_be(),
value[4].to_be(),
value[5].to_be(),
value[6].to_be(),
value[7].to_be(),
];
unsafe { core::mem::transmute::<_, [u8; 16]>(addr16) }
}