src/test/mir-opt/simplify-arm.rs

   1 // compile-flags: -Z mir-opt-level=1
   2 // EMIT_MIR rustc.id.SimplifyArmIdentity.diff
   3 // EMIT_MIR rustc.id.SimplifyBranchSame.diff
   4 // EMIT_MIR rustc.id_result.SimplifyArmIdentity.diff
   5 // EMIT_MIR rustc.id_result.SimplifyBranchSame.diff
   6 // EMIT_MIR rustc.id_try.SimplifyArmIdentity.diff
   7 // EMIT_MIR rustc.id_try.SimplifyBranchSame.diff
   8
   9 fn id(o: Option<u8>) -> Option<u8> {
  10     match o {
  11         Some(v) => Some(v),
  12         None => None,
  13     }
  14 }
  15
  16 fn id_result(r: Result<u8, i32>) -> Result<u8, i32> {
  17     match r {
  18         Ok(x) => Ok(x),
  19         Err(y) => Err(y),
  20     }
  21 }
  22
  23 fn id_try(r: Result<u8, i32>) -> Result<u8, i32> {
  24     let x = r?;
  25     Ok(x)
  26 }
  27
  28 fn main() {
  29     id(None);
  30     id_result(Ok(4));
  31     id_try(Ok(4));
  32 }