rust/src/test/mir-opt/unreachable/rustc.main.UnreachablePropagation.diff

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- // MIR for `main` before UnreachablePropagation
+ // MIR for `main` after UnreachablePropagation
fn main() -> () {
let mut _0: (); // return place in scope 0 at $DIR/unreachable.rs:8:11: 8:11
let mut _1: std::option::Option<Empty>; // in scope 0 at $DIR/unreachable.rs:9:23: 9:30
let mut _2: isize; // in scope 0 at $DIR/unreachable.rs:9:12: 9:20
let _3: Empty; // in scope 0 at $DIR/unreachable.rs:9:17: 9:19
let _5: (); // in scope 0 at $DIR/unreachable.rs:12:9: 16:10
let mut _6: bool; // in scope 0 at $DIR/unreachable.rs:12:12: 12:16
let mut _7: !; // in scope 0 at $DIR/unreachable.rs:18:9: 18:21
scope 1 {
debug _x => _3; // in scope 1 at $DIR/unreachable.rs:9:17: 9:19
let mut _4: i32; // in scope 1 at $DIR/unreachable.rs:10:13: 10:19
scope 2 {
debug _y => _4; // in scope 2 at $DIR/unreachable.rs:10:13: 10:19
}
}
bb0: {
StorageLive(_1); // bb0[0]: scope 0 at $DIR/unreachable.rs:9:23: 9:30
_1 = const empty() -> bb1; // bb0[1]: scope 0 at $DIR/unreachable.rs:9:23: 9:30
// ty::Const
// + ty: fn() -> std::option::Option<Empty> {empty}
// + val: Value(Scalar(<ZST>))
// mir::Constant
// + span: $DIR/unreachable.rs:9:23: 9:28
// + literal: Const { ty: fn() -> std::option::Option<Empty> {empty}, val: Value(Scalar(<ZST>)) }
}
bb1: {
_2 = discriminant(_1); // bb1[0]: scope 0 at $DIR/unreachable.rs:9:12: 9:20
- switchInt(move _2) -> [1isize: bb3, otherwise: bb2]; // bb1[1]: scope 0 at $DIR/unreachable.rs:9:12: 9:20
+ goto -> bb2; // bb1[1]: scope 0 at $DIR/unreachable.rs:9:12: 9:20
}
bb2: {
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_0 = const (); // bb2[0]: scope 0 at $DIR/unreachable.rs:9:5: 19:6
// ty::Const
// + ty: ()
// + val: Value(Scalar(<ZST>))
// mir::Constant
// + span: $DIR/unreachable.rs:9:5: 19:6
// + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
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StorageDead(_1); // bb2[1]: scope 0 at $DIR/unreachable.rs:20:1: 20:2
return; // bb2[2]: scope 0 at $DIR/unreachable.rs:20:2: 20:2
- }
-
- bb3: {
- StorageLive(_3); // bb3[0]: scope 0 at $DIR/unreachable.rs:9:17: 9:19
- _3 = move ((_1 as Some).0: Empty); // bb3[1]: scope 0 at $DIR/unreachable.rs:9:17: 9:19
- StorageLive(_4); // bb3[2]: scope 1 at $DIR/unreachable.rs:10:13: 10:19
- StorageLive(_5); // bb3[3]: scope 2 at $DIR/unreachable.rs:12:9: 16:10
- StorageLive(_6); // bb3[4]: scope 2 at $DIR/unreachable.rs:12:12: 12:16
- _6 = const true; // bb3[5]: scope 2 at $DIR/unreachable.rs:12:12: 12:16
- // ty::Const
- // + ty: bool
- // + val: Value(Scalar(0x01))
- // mir::Constant
- // + span: $DIR/unreachable.rs:12:12: 12:16
- // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
- switchInt(_6) -> [false: bb4, otherwise: bb5]; // bb3[6]: scope 2 at $DIR/unreachable.rs:12:9: 16:10
- }
-
- bb4: {
- _4 = const 42i32; // bb4[0]: scope 2 at $DIR/unreachable.rs:15:13: 15:20
- // ty::Const
- // + ty: i32
- // + val: Value(Scalar(0x0000002a))
- // mir::Constant
- // + span: $DIR/unreachable.rs:15:18: 15:20
- // + literal: Const { ty: i32, val: Value(Scalar(0x0000002a)) }
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- _5 = const (); // bb4[1]: scope 2 at $DIR/unreachable.rs:14:16: 16:10
- // ty::Const
- // + ty: ()
- // + val: Value(Scalar(<ZST>))
- // mir::Constant
- // + span: $DIR/unreachable.rs:14:16: 16:10
- // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
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- goto -> bb6; // bb4[2]: scope 2 at $DIR/unreachable.rs:12:9: 16:10
- }
-
- bb5: {
- _4 = const 21i32; // bb5[0]: scope 2 at $DIR/unreachable.rs:13:13: 13:20
- // ty::Const
- // + ty: i32
- // + val: Value(Scalar(0x00000015))
- // mir::Constant
- // + span: $DIR/unreachable.rs:13:18: 13:20
- // + literal: Const { ty: i32, val: Value(Scalar(0x00000015)) }
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- _5 = const (); // bb5[1]: scope 2 at $DIR/unreachable.rs:12:17: 14:10
- // ty::Const
- // + ty: ()
- // + val: Value(Scalar(<ZST>))
- // mir::Constant
- // + span: $DIR/unreachable.rs:12:17: 14:10
- // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
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- goto -> bb6; // bb5[2]: scope 2 at $DIR/unreachable.rs:12:9: 16:10
- }
-
- bb6: {
- StorageDead(_6); // bb6[0]: scope 2 at $DIR/unreachable.rs:16:9: 16:10
- StorageDead(_5); // bb6[1]: scope 2 at $DIR/unreachable.rs:16:9: 16:10
- StorageLive(_7); // bb6[2]: scope 2 at $DIR/unreachable.rs:18:9: 18:21
- unreachable; // bb6[3]: scope 2 at $DIR/unreachable.rs:18:15: 18:17
}
}