- // MIR for `map` before SimplifyLocals-before-const-prop + // MIR for `map` after SimplifyLocals-before-const-prop fn map(_1: Option<Box<()>>) -> Option<Box<()>> { debug x => _1; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+0:8: +0:9 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 let mut _2: isize; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+2:9: +2:13 let _3: std::boxed::Box<()>; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:14: +3:15 let mut _4: std::boxed::Box<()>; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:25: +3:26 - let mut _5: bool; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+5:1: +5:2 - let mut _6: isize; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+5:1: +5:2 - let mut _7: isize; // in scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+5:1: +5:2 scope 1 { debug x => _3; // in scope 1 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:14: +3:15 } bb0: { - _5 = const false; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+1:11: +1:12 - _5 = const true; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+1:11: +1:12 _2 = discriminant(_1); // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+1:11: +1:12 switchInt(move _2) -> [0: bb3, 1: bb1, otherwise: bb2]; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+1:5: +1:12 } bb1: { StorageLive(_3); // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:14: +3:15 _3 = move ((_1 as Some).0: std::boxed::Box<()>); // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:14: +3:15 StorageLive(_4); // scope 1 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:25: +3:26 _4 = move _3; // scope 1 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:25: +3:26 _0 = Option::<Box<()>>::Some(move _4); // scope 1 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:20: +3:27 StorageDead(_4); // scope 1 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:26: +3:27 StorageDead(_3); // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:26: +3:27 goto -> bb4; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+3:26: +3:27 } bb2: { unreachable; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+1:11: +1:12 } bb3: { _0 = Option::<Box<()>>::None; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+2:17: +2:21 goto -> bb4; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+2:17: +2:21 } bb4: { - _6 = discriminant(_1); // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+5:1: +5:2 return; // scope 0 at $DIR/simplify_locals_removes_unused_discriminant_reads.rs:+5:2: +5:2 } }