mirror of https://github.com/rust-lang/rust
30 lines
744 B
Rust
30 lines
744 B
Rust
//@ test-mir-pass: InstSimplify-after-simplifycfg
|
|
|
|
#![feature(custom_mir, core_intrinsics)]
|
|
#![crate_type = "lib"]
|
|
|
|
use std::intrinsics::mir::*;
|
|
|
|
// EMIT_MIR duplicate_switch_targets.assert_zero.InstSimplify-after-simplifycfg.diff
|
|
#[custom_mir(dialect = "runtime", phase = "post-cleanup")]
|
|
pub unsafe fn assert_zero(x: u8) -> u8 {
|
|
// CHECK-LABEL: fn assert_zero(
|
|
// CHECK: switchInt({{.*}}) -> [0: {{bb.*}}, otherwise: {{bb.*}}]
|
|
mir! {
|
|
{
|
|
match x {
|
|
0 => retblock,
|
|
1 => unreachable,
|
|
_ => unreachable,
|
|
}
|
|
}
|
|
unreachable = {
|
|
Unreachable()
|
|
}
|
|
retblock = {
|
|
RET = x;
|
|
Return()
|
|
}
|
|
}
|
|
}
|