src/test/mir-opt/early_otherwise_branch_noopt.rs

   1 // compile-flags: -Z mir-opt-level=3
   2
   3 // must not optimize as it does not follow the pattern of
   4 // left and right hand side being the same variant
   5
   6 // EMIT_MIR early_otherwise_branch_noopt.noopt1.EarlyOtherwiseBranch.diff
   7 fn noopt1(x: Option<u32>, y: Option<u32>) -> u32 {
   8     match (x, y) {
   9         (Some(a), Some(b)) => 0,
  10         (Some(a), None) => 1,
  11         (None, Some(b)) => 2,
  12         (None, None) => 3,
  13     }
  14 }
  15
  16 // must not optimize as the types being matched on are not identical
  17 // EMIT_MIR early_otherwise_branch_noopt.noopt2.EarlyOtherwiseBranch.diff
  18 fn noopt2(x: Option<u32>, y: Option<bool>) -> u32 {
  19     match (x, y) {
  20         (Some(a), Some(b)) => 0,
  21         _ => 1,
  22     }
  23 }
  24
  25 fn main() {
  26     noopt1(None, Some(0));
  27     noopt2(None, Some(true));
  28 }