mirror of https://github.com/rust-lang/rust
28 lines
666 B
Rust
28 lines
666 B
Rust
// This test verifies that the MIR we output using the `matches!()` macro is close
|
|
// to the MIR for an `if let` branch.
|
|
|
|
pub enum Foo {
|
|
A,
|
|
B,
|
|
C,
|
|
D,
|
|
E,
|
|
F,
|
|
}
|
|
|
|
// EMIT_MIR matches_macro.issue_77355_opt.PreCodegen.after.mir
|
|
fn issue_77355_opt(num: Foo) -> u64 {
|
|
// CHECK-LABEL: fn issue_77355_opt(
|
|
// CHECK: switchInt({{.*}}) -> [1: bb1, 2: bb1, otherwise: bb2];
|
|
// CHECK: bb1: {
|
|
// CHECK-NEXT: _0 = const 23_u64;
|
|
// CHECK-NEXT: return;
|
|
// CHECK: bb2: {
|
|
// CHECK-NEXT: _0 = const 42_u64;
|
|
// CHECK-NEXT: return;
|
|
if matches!(num, Foo::B | Foo::C) { 23 } else { 42 }
|
|
}
|
|
fn main() {
|
|
issue_77355_opt(Foo::A);
|
|
}
|