src/test/mir-opt/early_otherwise_branch.rs

   1 // compile-flags: -Z mir-opt-level=4 -Z unsound-mir-opts
   2 // EMIT_MIR early_otherwise_branch.opt1.EarlyOtherwiseBranch.diff
   3 fn opt1(x: Option<u32>, y: Option<u32>) -> u32 {
   4     match (x, y) {
   5         (Some(a), Some(b)) => 0,
   6         _ => 1,
   7     }
   8 }
   9
  10 // EMIT_MIR early_otherwise_branch.opt2.EarlyOtherwiseBranch.diff
  11 fn opt2(x: Option<u32>, y: Option<u32>) -> u32 {
  12     match (x, y) {
  13         (Some(a), Some(b)) => 0,
  14         (None, None) => 0,
  15         _ => 1,
  16     }
  17 }
  18
  19 fn main() {
  20     opt1(None, Some(0));
  21     opt2(None, Some(0));
  22 }