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[rust.git] / tests / codegen / try_question_mark_nop.rs
1 // min-llvm-version: 15.0
2 // compile-flags: -O -Z merge-functions=disabled --edition=2021
3 // only-x86_64
4
5 #![crate_type = "lib"]
6 #![feature(try_blocks)]
7
8 // These are now NOPs in LLVM 15, presumably thanks to nikic's change mentioned in
9 // <https://github.com/rust-lang/rust/issues/85133#issuecomment-1072168354>.
10 // Unfortunately, as of 2022-08-17 they're not yet nops for `u64`s nor `Option`.
11
12 use std::ops::ControlFlow::{self, Continue, Break};
13
14 // CHECK-LABEL: @result_nop_match_32
15 #[no_mangle]
16 pub fn result_nop_match_32(x: Result<i32, u32>) -> Result<i32, u32> {
17     // CHECK: start
18     // CHECK-NEXT: ret i64 %0
19     match x {
20         Ok(x) => Ok(x),
21         Err(x) => Err(x),
22     }
23 }
24
25 // CHECK-LABEL: @result_nop_traits_32
26 #[no_mangle]
27 pub fn result_nop_traits_32(x: Result<i32, u32>) -> Result<i32, u32> {
28     // CHECK: start
29     // CHECK-NEXT: ret i64 %0
30     try {
31         x?
32     }
33 }
34
35 // CHECK-LABEL: @control_flow_nop_match_32
36 #[no_mangle]
37 pub fn control_flow_nop_match_32(x: ControlFlow<i32, u32>) -> ControlFlow<i32, u32> {
38     // CHECK: start
39     // CHECK-NEXT: ret i64 %0
40     match x {
41         Continue(x) => Continue(x),
42         Break(x) => Break(x),
43     }
44 }
45
46 // CHECK-LABEL: @control_flow_nop_traits_32
47 #[no_mangle]
48 pub fn control_flow_nop_traits_32(x: ControlFlow<i32, u32>) -> ControlFlow<i32, u32> {
49     // CHECK: start
50     // CHECK-NEXT: ret i64 %0
51     try {
52         x?
53     }
54 }