4 #![crate_type = "rlib"]
11 pub unsafe fn pure(x: i32) {
13 asm!("", out("ax") y, in("bx") x, options(pure, nomem));
16 // CHECK-LABEL: @noreturn
17 // CHECK: call void asm
18 // CHECK-NEXT: unreachable
20 pub unsafe fn noreturn() {
21 asm!("", options(noreturn));
24 pub static mut VAR: i32 = 0;
25 pub static mut DUMMY_OUTPUT: i32 = 0;
27 // CHECK-LABEL: @readonly
28 // CHECK: call i32 asm
31 pub unsafe fn readonly() -> i32 {
33 asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly));
37 // CHECK-LABEL: @not_readonly
38 // CHECK: call i32 asm
41 pub unsafe fn not_readonly() -> i32 {
43 asm!("", out("ax") DUMMY_OUTPUT, options());
47 // CHECK-LABEL: @nomem
49 // CHECK: call i32 asm
53 pub unsafe fn nomem() -> i32 {
55 asm!("", out("ax") DUMMY_OUTPUT, options(pure, nomem));
60 // CHECK-LABEL: @nomem_nopure
62 // CHECK: call i32 asm
66 pub unsafe fn nomem_nopure() -> i32 {
68 asm!("", out("ax") DUMMY_OUTPUT, options(nomem));
73 // CHECK-LABEL: @not_nomem
75 // CHECK: call i32 asm
79 pub unsafe fn not_nomem() -> i32 {
81 asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly));
86 // CHECK-LABEL: @dont_remove_nonpure
87 // CHECK: call void asm
88 // CHECK: call void asm
89 // CHECK: call void asm
92 pub unsafe fn dont_remove_nonpure() {
94 asm!("", options(nomem));
95 asm!("", options(readonly));