| //@ compile-flags: -Copt-level=2 |
| |
| #![crate_type = "lib"] |
| #![no_std] |
| |
| // This test is paired with the arch-specific -opt3.rs test. |
| |
| // 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 |
| #[no_mangle] |
| pub fn convert(value: [u16; 8]) -> [u8; 16] { |
| #[cfg(target_endian = "little")] |
| let bswap = u16::to_be; |
| #[cfg(target_endian = "big")] |
| let bswap = u16::to_le; |
| let addr16 = [ |
| bswap(value[0]), |
| bswap(value[1]), |
| bswap(value[2]), |
| bswap(value[3]), |
| bswap(value[4]), |
| bswap(value[5]), |
| bswap(value[6]), |
| bswap(value[7]), |
| ]; |
| unsafe { core::mem::transmute::<_, [u8; 16]>(addr16) } |
| } |
