0a42dfc2fa
Previously, we would set up the source lines for `match` expressions so
that the code generated to perform the test of the scrutinee was matched
to the line of the arm that required the test and then jump from the arm
block to the "next" block was matched to all of the lines in the `match`
expression.
While that makes sense, it has the side effect of causing strange
stepping behavior in debuggers.
I've changed the source information so that all of the generated tests
are sourced to `match {scrutinee}` and the jumps are sourced to the last
line of the block they are inside. This resolves the weird stepping
behavior in all debuggers and resolves some instances of "ambiguous
symbol" errors in WinDbg preventing the user from setting breakpoints at
`match` expressions.
107 lines
9.5 KiB
Diff
107 lines
9.5 KiB
Diff
- // MIR for `main` before UninhabitedEnumBranching
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+ // MIR for `main` after UninhabitedEnumBranching
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fn main() -> () {
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let mut _0: (); // return place in scope 0 at $DIR/uninhabited_enum_branching.rs:19:11: 19:11
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let _1: &str; // in scope 0 at $DIR/uninhabited_enum_branching.rs:20:5: 24:6
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let mut _2: Test1; // in scope 0 at $DIR/uninhabited_enum_branching.rs:20:11: 20:19
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let mut _3: isize; // in scope 0 at $DIR/uninhabited_enum_branching.rs:21:9: 21:20
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let _4: &str; // in scope 0 at $DIR/uninhabited_enum_branching.rs:22:24: 22:34
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let _5: &str; // in scope 0 at $DIR/uninhabited_enum_branching.rs:23:21: 23:24
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let _6: &str; // in scope 0 at $DIR/uninhabited_enum_branching.rs:26:5: 29:6
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let mut _7: Test2; // in scope 0 at $DIR/uninhabited_enum_branching.rs:26:11: 26:19
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let mut _8: isize; // in scope 0 at $DIR/uninhabited_enum_branching.rs:27:9: 27:17
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let _9: &str; // in scope 0 at $DIR/uninhabited_enum_branching.rs:28:21: 28:24
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bb0: {
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StorageLive(_1); // scope 0 at $DIR/uninhabited_enum_branching.rs:20:5: 24:6
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StorageLive(_2); // scope 0 at $DIR/uninhabited_enum_branching.rs:20:11: 20:19
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discriminant(_2) = 2; // scope 0 at $DIR/uninhabited_enum_branching.rs:20:11: 20:19
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_3 = discriminant(_2); // scope 0 at $DIR/uninhabited_enum_branching.rs:20:11: 20:19
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- switchInt(move _3) -> [0_isize: bb2, 1_isize: bb3, otherwise: bb1]; // scope 0 at $DIR/uninhabited_enum_branching.rs:20:5: 20:19
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+ switchInt(move _3) -> bb1; // scope 0 at $DIR/uninhabited_enum_branching.rs:20:5: 20:19
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}
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bb1: {
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StorageLive(_5); // scope 0 at $DIR/uninhabited_enum_branching.rs:23:21: 23:24
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_5 = const "C"; // scope 0 at $DIR/uninhabited_enum_branching.rs:23:21: 23:24
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// ty::Const
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// + ty: &str
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// + val: Value(Slice { data: Allocation { bytes: [67], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 })
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// mir::Constant
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// + span: $DIR/uninhabited_enum_branching.rs:23:21: 23:24
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// + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [67], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 }) }
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_1 = &(*_5); // scope 0 at $DIR/uninhabited_enum_branching.rs:23:21: 23:24
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StorageDead(_5); // scope 0 at $DIR/uninhabited_enum_branching.rs:23:23: 23:24
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goto -> bb4; // scope 0 at $DIR/uninhabited_enum_branching.rs:23:23: 23:24
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}
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bb2: {
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_1 = const "A(Empty)"; // scope 0 at $DIR/uninhabited_enum_branching.rs:21:24: 21:34
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// ty::Const
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// + ty: &str
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// + val: Value(Slice { data: Allocation { bytes: [65, 40, 69, 109, 112, 116, 121, 41], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 8 })
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// mir::Constant
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// + span: $DIR/uninhabited_enum_branching.rs:21:24: 21:34
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// + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [65, 40, 69, 109, 112, 116, 121, 41], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 8 }) }
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goto -> bb4; // scope 0 at $DIR/uninhabited_enum_branching.rs:21:24: 21:34
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}
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bb3: {
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StorageLive(_4); // scope 0 at $DIR/uninhabited_enum_branching.rs:22:24: 22:34
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_4 = const "B(Empty)"; // scope 0 at $DIR/uninhabited_enum_branching.rs:22:24: 22:34
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// ty::Const
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// + ty: &str
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// + val: Value(Slice { data: Allocation { bytes: [66, 40, 69, 109, 112, 116, 121, 41], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 8 })
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// mir::Constant
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// + span: $DIR/uninhabited_enum_branching.rs:22:24: 22:34
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// + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [66, 40, 69, 109, 112, 116, 121, 41], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 8 }) }
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_1 = &(*_4); // scope 0 at $DIR/uninhabited_enum_branching.rs:22:24: 22:34
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StorageDead(_4); // scope 0 at $DIR/uninhabited_enum_branching.rs:22:33: 22:34
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goto -> bb4; // scope 0 at $DIR/uninhabited_enum_branching.rs:22:33: 22:34
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}
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bb4: {
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StorageDead(_2); // scope 0 at $DIR/uninhabited_enum_branching.rs:24:6: 24:7
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StorageDead(_1); // scope 0 at $DIR/uninhabited_enum_branching.rs:24:6: 24:7
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StorageLive(_6); // scope 0 at $DIR/uninhabited_enum_branching.rs:26:5: 29:6
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StorageLive(_7); // scope 0 at $DIR/uninhabited_enum_branching.rs:26:11: 26:19
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discriminant(_7) = 0; // scope 0 at $DIR/uninhabited_enum_branching.rs:26:11: 26:19
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_8 = discriminant(_7); // scope 0 at $DIR/uninhabited_enum_branching.rs:26:11: 26:19
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switchInt(move _8) -> [4_isize: bb6, otherwise: bb5]; // scope 0 at $DIR/uninhabited_enum_branching.rs:26:5: 26:19
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}
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bb5: {
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StorageLive(_9); // scope 0 at $DIR/uninhabited_enum_branching.rs:28:21: 28:24
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_9 = const "E"; // scope 0 at $DIR/uninhabited_enum_branching.rs:28:21: 28:24
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// ty::Const
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// + ty: &str
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// + val: Value(Slice { data: Allocation { bytes: [69], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 })
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// mir::Constant
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// + span: $DIR/uninhabited_enum_branching.rs:28:21: 28:24
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// + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [69], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 }) }
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_6 = &(*_9); // scope 0 at $DIR/uninhabited_enum_branching.rs:28:21: 28:24
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StorageDead(_9); // scope 0 at $DIR/uninhabited_enum_branching.rs:28:23: 28:24
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goto -> bb7; // scope 0 at $DIR/uninhabited_enum_branching.rs:28:23: 28:24
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}
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bb6: {
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_6 = const "D"; // scope 0 at $DIR/uninhabited_enum_branching.rs:27:21: 27:24
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// ty::Const
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// + ty: &str
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// + val: Value(Slice { data: Allocation { bytes: [68], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 })
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// mir::Constant
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// + span: $DIR/uninhabited_enum_branching.rs:27:21: 27:24
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// + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [68], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [1], len: Size { raw: 1 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 1 }) }
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goto -> bb7; // scope 0 at $DIR/uninhabited_enum_branching.rs:27:21: 27:24
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}
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bb7: {
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StorageDead(_7); // scope 0 at $DIR/uninhabited_enum_branching.rs:29:6: 29:7
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StorageDead(_6); // scope 0 at $DIR/uninhabited_enum_branching.rs:29:6: 29:7
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_0 = const (); // scope 0 at $DIR/uninhabited_enum_branching.rs:19:11: 30:2
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return; // scope 0 at $DIR/uninhabited_enum_branching.rs:30:2: 30:2
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}
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}
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