rust/tests/mir-opt/deref-patterns/string.foo.PreCodegen.after.mir

// MIR for `foo` after PreCodegen

fn foo(_1: Option<String>) -> i32 {
    debug s => _1;                       // in scope 0 at $DIR/string.rs:+0:12: +0:13
    let mut _0: i32;                     // return place in scope 0 at $DIR/string.rs:+0:34: +0:37
    let mut _2: bool;                    // in scope 0 at $DIR/string.rs:+5:1: +5:2
    let mut _3: isize;                   // in scope 0 at $DIR/string.rs:+2:9: +2:18
    let mut _4: &std::string::String;    // in scope 0 at $DIR/string.rs:+2:14: +2:17
    let mut _5: &str;                    // in scope 0 at $DIR/string.rs:+2:14: +2:17
    let mut _6: bool;                    // in scope 0 at $DIR/string.rs:+2:14: +2:17
    let _7: std::option::Option<std::string::String>; // in scope 0 at $DIR/string.rs:+3:9: +3:10
    scope 1 {
        debug s => _7;                   // in scope 1 at $DIR/string.rs:+3:9: +3:10
    }

    bb0: {
        _2 = const false;                // scope 0 at $DIR/string.rs:+1:11: +1:12
        _2 = const true;                 // scope 0 at $DIR/string.rs:+1:11: +1:12
        _3 = discriminant(_1);           // scope 0 at $DIR/string.rs:+1:11: +1:12
        switchInt(move _3) -> [1: bb1, otherwise: bb5]; // scope 0 at $DIR/string.rs:+1:5: +1:12
    }

    bb1: {
        _4 = &((_1 as Some).0: std::string::String); // scope 0 at $DIR/string.rs:+2:14: +2:17
        _5 = <String as Deref>::deref(move _4) -> [return: bb2, unwind unreachable]; // scope 0 at $DIR/string.rs:+2:14: +2:17
                                         // mir::Constant
                                         // + span: $DIR/string.rs:9:14: 9:17
                                         // + literal: Const { ty: for<'a> fn(&'a String) -> &'a <String as Deref>::Target {<String as Deref>::deref}, val: Value(<ZST>) }
    }

    bb2: {
        _6 = <str as PartialEq>::eq(_5, const "a") -> [return: bb3, unwind unreachable]; // scope 0 at $DIR/string.rs:+2:14: +2:17
                                         // mir::Constant
                                         // + span: $DIR/string.rs:9:14: 9:17
                                         // + literal: Const { ty: for<'a, 'b> fn(&'a str, &'b str) -> bool {<str as PartialEq>::eq}, val: Value(<ZST>) }
                                         // mir::Constant
                                         // + span: $DIR/string.rs:9:14: 9:17
                                         // + literal: Const { ty: &str, val: Value(Slice(..)) }
    }

    bb3: {
        switchInt(move _6) -> [0: bb5, otherwise: bb4]; // scope 0 at $DIR/string.rs:+2:14: +2:17
    }

    bb4: {
        _0 = const 1234_i32;             // scope 0 at $DIR/string.rs:+2:22: +2:26
        goto -> bb7;                     // scope 0 at $DIR/string.rs:+2:22: +2:26
    }

    bb5: {
        StorageLive(_7);                 // scope 0 at $DIR/string.rs:+3:9: +3:10
        _2 = const false;                // scope 0 at $DIR/string.rs:+3:9: +3:10
        _7 = move _1;                    // scope 0 at $DIR/string.rs:+3:9: +3:10
        _0 = const 4321_i32;             // scope 1 at $DIR/string.rs:+3:14: +3:18
        drop(_7) -> [return: bb6, unwind unreachable]; // scope 0 at $DIR/string.rs:+3:17: +3:18
    }

    bb6: {
        StorageDead(_7);                 // scope 0 at $DIR/string.rs:+3:17: +3:18
        goto -> bb7;                     // scope 0 at $DIR/string.rs:+3:17: +3:18
    }

    bb7: {
        switchInt(_2) -> [0: bb9, otherwise: bb8]; // scope 0 at $DIR/string.rs:+5:1: +5:2
    }

    bb8: {
        drop(_1) -> [return: bb9, unwind unreachable]; // scope 0 at $DIR/string.rs:+5:1: +5:2
    }

    bb9: {
        return;                          // scope 0 at $DIR/string.rs:+5:2: +5:2
    }
}