|  | //@ assembly-output: emit-asm | 
|  | //@ compile-flags: -Zinstrument-xray=always -Cllvm-args=-x86-asm-syntax=intel | 
|  |  | 
|  | //@ revisions: x86_64-linux | 
|  | //@[x86_64-linux] compile-flags: --target=x86_64-unknown-linux-gnu | 
|  | //@[x86_64-linux] needs-llvm-components: x86 | 
|  | //@[x86_64-linux] only-x86_64-unknown-linux-gnu | 
|  |  | 
|  | //@ revisions: x86_64-darwin | 
|  | //@[x86_64-darwin] compile-flags: --target=x86_64-apple-darwin | 
|  | //@[x86_64-darwin] needs-llvm-components: x86 | 
|  | //@[x86_64-darwin] only-x86_64-apple-darwin | 
|  |  | 
|  | #![crate_type = "lib"] | 
|  |  | 
|  | // CHECK-LABEL: xray_func: | 
|  | #[no_mangle] | 
|  | pub fn xray_func() { | 
|  | // CHECK: nop word ptr [rax + rax + 512] | 
|  |  | 
|  | std::hint::black_box(()); | 
|  |  | 
|  | // CHECK: ret | 
|  | // CHECK-NEXT: nop word ptr cs:[rax + rax + 512] | 
|  | } |