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FileCheck uninhabited_enum_branching.

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This commit is contained in:
Camille GILLOT 2023-10-21 13:45:25 +00:00
parent cb918904fe
commit ae2e21114b
7 changed files with 126 additions and 245 deletions
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18
tests/mir-opt/uninhabited_enum_branching2.main.UninhabitedEnumBranching.diff → tests/mir-opt/uninhabited_enum_branching.byref.UninhabitedEnumBranching.diff
View File

@ -1,12 +1,12 @@
- // MIR for `main` before UninhabitedEnumBranching
+ // MIR for `main` after UninhabitedEnumBranching
- // MIR for `byref` before UninhabitedEnumBranching
+ // MIR for `byref` after UninhabitedEnumBranching
fn main() -> () {
fn byref() -> () {
let mut _0: ();
let _1: Plop;
let mut _2: Test1;
let mut _2: Test3;
let _3: &str;
let mut _4: &Test1;
let mut _4: &Test3;
let mut _5: isize;
let _6: &str;
let _7: &str;
@ -23,12 +23,12 @@
bb0: {
StorageLive(_1);
StorageLive(_2);
_2 = Test1::C;
_1 = Plop { xx: const 51_u32, test1: move _2 };
_2 = Test3::C;
_1 = Plop { xx: const 51_u32, test3: move _2 };
StorageDead(_2);
StorageLive(_3);
StorageLive(_4);
_4 = &(_1.1: Test1);
_4 = &(_1.1: Test3);
_5 = discriminant((*_4));
- switchInt(move _5) -> [0: bb3, 1: bb4, 2: bb5, 3: bb1, otherwise: bb2];
+ switchInt(move _5) -> [0: bb12, 1: bb12, 2: bb5, 3: bb1, otherwise: bb12];
@ -71,7 +71,7 @@
StorageDead(_4);
StorageDead(_3);
StorageLive(_9);
_10 = discriminant((_1.1: Test1));
_10 = discriminant((_1.1: Test3));
- switchInt(move _10) -> [0: bb8, 1: bb9, 2: bb10, 3: bb7, otherwise: bb2];
+ switchInt(move _10) -> [0: bb12, 1: bb12, 2: bb10, 3: bb7, otherwise: bb12];
}

48
tests/mir-opt/uninhabited_enum_branching.custom_discriminant.UninhabitedEnumBranching.diff Normal file
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@ -0,0 +1,48 @@
- // MIR for `custom_discriminant` before UninhabitedEnumBranching
+ // MIR for `custom_discriminant` after UninhabitedEnumBranching
fn custom_discriminant() -> () {
let mut _0: ();
let _1: &str;
let mut _2: Test2;
let mut _3: isize;
let _4: &str;
bb0: {
StorageLive(_1);
StorageLive(_2);
_2 = Test2::D;
_3 = discriminant(_2);
- switchInt(move _3) -> [4: bb3, 5: bb1, otherwise: bb2];
+ switchInt(move _3) -> [4: bb3, 5: bb1, otherwise: bb5];
}
bb1: {
StorageLive(_4);
_4 = const "E";
_1 = &(*_4);
StorageDead(_4);
goto -> bb4;
}
bb2: {
unreachable;
}
bb3: {
_1 = const "D";
goto -> bb4;
}
bb4: {
StorageDead(_2);
StorageDead(_1);
_0 = const ();
return;
+ }
+
+ bb5: {
+ unreachable;
}
}

65
tests/mir-opt/uninhabited_enum_branching.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir
View File

@ -1,65 +0,0 @@
// MIR for `main` after SimplifyCfg-after-uninhabited-enum-branching
fn main() -> () {
let mut _0: ();
let _1: &str;
let mut _2: Test1;
let mut _3: isize;
let _4: &str;
let _5: &str;
let _6: &str;
let mut _7: Test2;
let mut _8: isize;
let _9: &str;
let mut _10: bool;
let mut _11: bool;
let mut _12: bool;
bb0: {
StorageLive(_1);
StorageLive(_2);
_2 = Test1::C;
_3 = discriminant(_2);
_10 = Ne(_3, const 0_isize);
assume(move _10);
_11 = Ne(_3, const 1_isize);
assume(move _11);
_12 = Eq(_3, const 2_isize);
assume(move _12);
StorageLive(_5);
_5 = const "C";
_1 = &(*_5);
StorageDead(_5);
StorageDead(_2);
StorageDead(_1);
StorageLive(_6);
StorageLive(_7);
_7 = Test2::D;
_8 = discriminant(_7);
switchInt(move _8) -> [4: bb3, 5: bb2, otherwise: bb1];
}
bb1: {
unreachable;
}
bb2: {
StorageLive(_9);
_9 = const "E";
_6 = &(*_9);
StorageDead(_9);
goto -> bb4;
}
bb3: {
_6 = const "D";
goto -> bb4;
}
bb4: {
StorageDead(_7);
StorageDead(_6);
_0 = const ();
return;
}
}

70
tests/mir-opt/uninhabited_enum_branching.rs
View File

@ -1,11 +1,11 @@
// skip-filecheck
enum Empty { }
// unit-test: UninhabitedEnumBranching
enum Empty {}
// test matching an enum with uninhabited variants
enum Test1 {
A(Empty),
B(Empty),
C
C,
}
// test an enum where the discriminants don't match the variant indexes
@ -15,17 +15,75 @@ enum Test2 {
E = 5,
}
// EMIT_MIR uninhabited_enum_branching.main.UninhabitedEnumBranching.diff
// EMIT_MIR uninhabited_enum_branching.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir
fn main() {
// test matching an enum with uninhabited variants and multiple inhabited
enum Test3 {
A(Empty),
B(Empty),
C,
D,
}
struct Plop {
xx: u32,
test3: Test3,
}
// EMIT_MIR uninhabited_enum_branching.simple.UninhabitedEnumBranching.diff
fn simple() {
// CHECK-LABEL: fn simple(
// CHECK: [[discr:_.*]] = discriminant(
// CHECK: switchInt(move [[discr]]) -> [0: [[unreachable:bb.*]], 1: [[unreachable]], 2: bb1, otherwise: [[unreachable]]];
// CHECK: [[unreachable]]: {
// CHECK-NEXT: unreachable;
match Test1::C {
Test1::A(_) => "A(Empty)",
Test1::B(_) => "B(Empty)",
Test1::C => "C",
};
}
// EMIT_MIR uninhabited_enum_branching.custom_discriminant.UninhabitedEnumBranching.diff
fn custom_discriminant() {
// CHECK-LABEL: fn custom_discriminant(
// CHECK: [[discr:_.*]] = discriminant(
// CHECK: switchInt(move [[discr]]) -> [4: bb3, 5: bb1, otherwise: bb5];
// CHECK: bb5: {
// CHECK-NEXT: unreachable;
match Test2::D {
Test2::D => "D",
Test2::E => "E",
};
}
// EMIT_MIR uninhabited_enum_branching.byref.UninhabitedEnumBranching.diff
fn byref() {
// CHECK-LABEL: fn byref(
let plop = Plop { xx: 51, test3: Test3::C };
// CHECK: [[ref_discr:_.*]] = discriminant((*
// CHECK: switchInt(move [[ref_discr]]) -> [0: [[unreachable:bb.*]], 1: [[unreachable]], 2: bb5, 3: bb1, otherwise: [[unreachable]]];
match &plop.test3 {
Test3::A(_) => "A(Empty)",
Test3::B(_) => "B(Empty)",
Test3::C => "C",
Test3::D => "D",
};
// CHECK: [[discr:_.*]] = discriminant(
// CHECK: switchInt(move [[discr]]) -> [0: [[unreachable]], 1: [[unreachable]], 2: bb10, 3: bb7, otherwise: [[unreachable]]];
match plop.test3 {
Test3::A(_) => "A(Empty)",
Test3::B(_) => "B(Empty)",
Test3::C => "C",
Test3::D => "D",
};
// CHECK: [[unreachable]]: {
// CHECK-NEXT: unreachable;
}
fn main() {
simple();
custom_discriminant();
byref();
}

38
tests/mir-opt/uninhabited_enum_branching.main.UninhabitedEnumBranching.diff → tests/mir-opt/uninhabited_enum_branching.simple.UninhabitedEnumBranching.diff
View File

@ -1,17 +1,13 @@
- // MIR for `main` before UninhabitedEnumBranching
+ // MIR for `main` after UninhabitedEnumBranching
- // MIR for `simple` before UninhabitedEnumBranching
+ // MIR for `simple` after UninhabitedEnumBranching
fn main() -> () {
fn simple() -> () {
let mut _0: ();
let _1: &str;
let mut _2: Test1;
let mut _3: isize;
let _4: &str;
let _5: &str;
let _6: &str;
let mut _7: Test2;
let mut _8: isize;
let _9: &str;
bb0: {
StorageLive(_1);
@ -19,7 +15,7 @@
_2 = Test1::C;
_3 = discriminant(_2);
- switchInt(move _3) -> [0: bb3, 1: bb4, 2: bb1, otherwise: bb2];
+ switchInt(move _3) -> [0: bb9, 1: bb9, 2: bb1, otherwise: bb9];
+ switchInt(move _3) -> [0: bb6, 1: bb6, 2: bb1, otherwise: bb6];
}
bb1: {
@ -50,35 +46,11 @@
bb5: {
StorageDead(_2);
StorageDead(_1);
StorageLive(_6);
StorageLive(_7);
_7 = Test2::D;
_8 = discriminant(_7);
- switchInt(move _8) -> [4: bb7, 5: bb6, otherwise: bb2];
+ switchInt(move _8) -> [4: bb7, 5: bb6, otherwise: bb9];
}
bb6: {
StorageLive(_9);
_9 = const "E";
_6 = &(*_9);
StorageDead(_9);
goto -> bb8;
}
bb7: {
_6 = const "D";
goto -> bb8;
}
bb8: {
StorageDead(_7);
StorageDead(_6);
_0 = const ();
return;
+ }
+
+ bb9: {
+ bb6: {
+ unreachable;
}
}

97
tests/mir-opt/uninhabited_enum_branching2.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir
View File

@ -1,97 +0,0 @@
// MIR for `main` after SimplifyCfg-after-uninhabited-enum-branching
fn main() -> () {
let mut _0: ();
let _1: Plop;
let mut _2: Test1;
let _3: &str;
let mut _4: &Test1;
let mut _5: isize;
let _6: &str;
let _7: &str;
let _8: &str;
let _9: &str;
let mut _10: isize;
let _11: &str;
let _12: &str;
let _13: &str;
let mut _14: bool;
let mut _15: bool;
let mut _16: bool;
let mut _17: bool;
scope 1 {
debug plop => _1;
}
bb0: {
StorageLive(_1);
StorageLive(_2);
_2 = Test1::C;
_1 = Plop { xx: const 51_u32, test1: move _2 };
StorageDead(_2);
StorageLive(_3);
StorageLive(_4);
_4 = &(_1.1: Test1);
_5 = discriminant((*_4));
_16 = Ne(_5, const 0_isize);
assume(move _16);
_17 = Ne(_5, const 1_isize);
assume(move _17);
switchInt(move _5) -> [2: bb3, 3: bb1, otherwise: bb2];
}
bb1: {
StorageLive(_8);
_8 = const "D";
_3 = &(*_8);
StorageDead(_8);
goto -> bb4;
}
bb2: {
unreachable;
}
bb3: {
StorageLive(_7);
_7 = const "C";
_3 = &(*_7);
StorageDead(_7);
goto -> bb4;
}
bb4: {
StorageDead(_4);
StorageDead(_3);
StorageLive(_9);
_10 = discriminant((_1.1: Test1));
_14 = Ne(_10, const 0_isize);
assume(move _14);
_15 = Ne(_10, const 1_isize);
assume(move _15);
switchInt(move _10) -> [2: bb6, 3: bb5, otherwise: bb2];
}
bb5: {
StorageLive(_13);
_13 = const "D";
_9 = &(*_13);
StorageDead(_13);
goto -> bb7;
}
bb6: {
StorageLive(_12);
_12 = const "C";
_9 = &(*_12);
StorageDead(_12);
goto -> bb7;
}
bb7: {
StorageDead(_9);
_0 = const ();
StorageDead(_1);
return;
}
}

35
tests/mir-opt/uninhabited_enum_branching2.rs
View File

@ -1,35 +0,0 @@
// skip-filecheck
enum Empty { }
// test matching an enum with uninhabited variants
enum Test1 {
A(Empty),
B(Empty),
C,
D,
}
struct Plop {
xx: u32,
test1: Test1,
}
// EMIT_MIR uninhabited_enum_branching2.main.UninhabitedEnumBranching.diff
// EMIT_MIR uninhabited_enum_branching2.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir
fn main() {
let plop = Plop { xx: 51, test1: Test1::C };
match &plop.test1 {
Test1::A(_) => "A(Empty)",
Test1::B(_) => "B(Empty)",
Test1::C => "C",
Test1::D => "D",
};
match plop.test1 {
Test1::A(_) => "A(Empty)",
Test1::B(_) => "B(Empty)",
Test1::C => "C",
Test1::D => "D",
};
}