src/test/mir-opt/copy_propagation_arg/rustc.foo.CopyPropagation.diff

   1 - // MIR for `foo` before CopyPropagation
   2 + // MIR for `foo` after CopyPropagation
   3
   4   fn foo(_1: u8) -> () {
   5       debug x => _1;                       // in scope 0 at $DIR/copy_propagation_arg.rs:9:8: 9:13
   6       let mut _0: ();                      // return place in scope 0 at $DIR/copy_propagation_arg.rs:9:19: 9:19
   7       let mut _2: u8;                      // in scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17
   8       let mut _3: u8;                      // in scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16
   9
  10       bb0: {
  11           StorageLive(_2);                 // bb0[0]: scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17
  12           StorageLive(_3);                 // bb0[1]: scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16
  13           _3 = _1;                         // bb0[2]: scope 0 at $DIR/copy_propagation_arg.rs:11:15: 11:16
  14           _2 = const dummy(move _3) -> bb1; // bb0[3]: scope 0 at $DIR/copy_propagation_arg.rs:11:9: 11:17
  15                                            // ty::Const
  16                                            // + ty: fn(u8) -> u8 {dummy}
  17                                            // + val: Value(Scalar(<ZST>))
  18                                            // mir::Constant
  19                                            // + span: $DIR/copy_propagation_arg.rs:11:9: 11:14
  20                                            // + literal: Const { ty: fn(u8) -> u8 {dummy}, val: Value(Scalar(<ZST>)) }
  21       }
  22
  23       bb1: {
  24           StorageDead(_3);                 // bb1[0]: scope 0 at $DIR/copy_propagation_arg.rs:11:16: 11:17
  25           _1 = move _2;                    // bb1[1]: scope 0 at $DIR/copy_propagation_arg.rs:11:5: 11:17
  26           StorageDead(_2);                 // bb1[2]: scope 0 at $DIR/copy_propagation_arg.rs:11:16: 11:17
  27           _0 = const ();                   // bb1[3]: scope 0 at $DIR/copy_propagation_arg.rs:9:19: 12:2
  28                                            // ty::Const
  29                                            // + ty: ()
  30                                            // + val: Value(Scalar(<ZST>))
  31                                            // mir::Constant
  32                                            // + span: $DIR/copy_propagation_arg.rs:9:19: 12:2
  33                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
  34           return;                          // bb1[4]: scope 0 at $DIR/copy_propagation_arg.rs:12:2: 12:2
  35       }
  36   }
  37