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21 lines
636 B
Rust
21 lines
636 B
Rust
//@ assembly-output: emit-asm
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//@ compile-flags: --crate-type=lib -Copt-level=3 -C llvm-args=-x86-asm-syntax=intel
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//@ only-x86_64
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//@ ignore-sgx
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//@ ignore-apple (manipulates rsp too)
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// Depending on various codegen choices, this might end up copying
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// a `<2 x i8>`, an `i16`, or two `i8`s.
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// Regardless of those choices, make sure the instructions use (2-byte) words.
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// CHECK-LABEL: array_copy_2_elements:
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#[no_mangle]
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pub fn array_copy_2_elements(a: &[u8; 2], p: &mut [u8; 2]) {
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// CHECK-NOT: byte
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// CHECK-NOT: mov
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// CHECK: mov{{.+}}, word ptr
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// CHECK-NEXT: mov word ptr
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// CHECK-NEXT: ret
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*p = *a;
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}
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