mirror of https://github.com/rust-lang/rust
73 lines
1.5 KiB
Diff
73 lines
1.5 KiB
Diff
- // MIR for `if_let` before UnreachablePropagation
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+ // MIR for `if_let` after UnreachablePropagation
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fn if_let() -> () {
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let mut _0: ();
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let mut _1: std::option::Option<Empty>;
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let mut _2: isize;
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let _5: ();
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let mut _6: bool;
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let mut _7: !;
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+ let mut _8: bool;
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scope 1 {
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debug _x => _3;
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let _3: Empty;
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let mut _4: i32;
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scope 2 {
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debug _y => _4;
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}
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}
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bb0: {
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StorageLive(_1);
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_1 = empty() -> [return: bb1, unwind unreachable];
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}
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bb1: {
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_2 = discriminant(_1);
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- switchInt(move _2) -> [1: bb2, otherwise: bb6];
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+ _8 = Ne(_2, const 1_isize);
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+ assume(move _8);
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+ goto -> bb6;
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}
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bb2: {
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- StorageLive(_3);
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- _3 = move ((_1 as Some).0: Empty);
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- StorageLive(_4);
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- StorageLive(_5);
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- StorageLive(_6);
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- _6 = const true;
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- switchInt(move _6) -> [0: bb4, otherwise: bb3];
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+ unreachable;
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}
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bb3: {
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- _4 = const 21_i32;
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- _5 = const ();
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- goto -> bb5;
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+ unreachable;
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}
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bb4: {
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- _4 = const 42_i32;
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- _5 = const ();
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- goto -> bb5;
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+ unreachable;
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}
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bb5: {
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- StorageDead(_6);
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- StorageDead(_5);
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- StorageLive(_7);
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unreachable;
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}
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bb6: {
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_0 = const ();
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StorageDead(_1);
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return;
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}
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}
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