32 lines
839 B
Rust
32 lines
839 B
Rust
//@ compile-flags: -Copt-level=2
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#![crate_type = "lib"]
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#![no_std]
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// This test is paired with the arch-specific -opt3.rs test.
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// The code is from https://github.com/rust-lang/rust/issues/122805.
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// Ensure we do not generate the shufflevector instruction
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// to avoid complicating the code.
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// CHECK-LABEL: define{{.*}}void @convert(
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// CHECK-NOT: shufflevector
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#[no_mangle]
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pub fn convert(value: [u16; 8]) -> [u8; 16] {
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#[cfg(target_endian = "little")]
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let bswap = u16::to_be;
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#[cfg(target_endian = "big")]
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let bswap = u16::to_le;
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let addr16 = [
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bswap(value[0]),
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bswap(value[1]),
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bswap(value[2]),
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bswap(value[3]),
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bswap(value[4]),
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bswap(value[5]),
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bswap(value[6]),
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bswap(value[7]),
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];
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unsafe { core::mem::transmute::<_, [u8; 16]>(addr16) }
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}
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