src/test/mir-opt/simplify_locals_removes_unused_discriminant_reads.map.SimplifyLocals.diff

   1 - // MIR for `map` before SimplifyLocals
   2 + // MIR for `map` after SimplifyLocals
   3
   4   fn map(_1: Option<Box<()>>) -> Option<Box<()>> {
   5       debug x => _1;                       // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+0:8: +0:9
   6       let mut _0: std::option::Option<std::boxed::Box<()>>; // return place in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+0:31: +0:46
   7       let mut _2: isize;                   // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+2:9: +2:13
   8       let _3: std::boxed::Box<()>;         // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:14: +3:15
   9       let mut _4: std::boxed::Box<()>;     // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:25: +3:26
  10 -     let mut _5: bool;                    // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+5:1: +5:2
  11 -     let mut _6: isize;                   // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+5:1: +5:2
  12 -     let mut _7: isize;                   // in scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+5:1: +5:2
  13       scope 1 {
  14           debug x => _3;                   // in scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:14: +3:15
  15       }
  16
  17       bb0: {
  18 -         _5 = const false;                // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+1:11: +1:12
  19 -         _5 = const true;                 // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+1:11: +1:12
  20           _2 = discriminant(_1);           // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+1:11: +1:12
  21           switchInt(move _2) -> [0_isize: bb3, 1_isize: bb1, otherwise: bb2]; // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+1:5: +1:12
  22       }
  23
  24       bb1: {
  25           StorageLive(_3);                 // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:14: +3:15
  26           _3 = move ((_1 as Some).0: std::boxed::Box<()>); // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:14: +3:15
  27           StorageLive(_4);                 // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:25: +3:26
  28           _4 = move _3;                    // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:25: +3:26
  29           Deinit(_0);                      // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:20: +3:27
  30           ((_0 as Some).0: std::boxed::Box<()>) = move _4; // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:20: +3:27
  31           discriminant(_0) = 1;            // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:20: +3:27
  32           StorageDead(_4);                 // scope 1 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:26: +3:27
  33           StorageDead(_3);                 // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:26: +3:27
  34           goto -> bb4;                     // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+3:26: +3:27
  35       }
  36
  37       bb2: {
  38           unreachable;                     // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+1:11: +1:12
  39       }
  40
  41       bb3: {
  42           Deinit(_0);                      // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+2:17: +2:21
  43           discriminant(_0) = 0;            // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+2:17: +2:21
  44           goto -> bb4;                     // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+2:17: +2:21
  45       }
  46
  47       bb4: {
  48 -         _6 = discriminant(_1);           // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+5:1: +5:2
  49           return;                          // scope 0 at $DIR/simplify-locals-removes-unused-discriminant-reads.rs:+5:2: +5:2
  50       }
  51   }
  52