From c00b38e9fbd417ffafd3c0508ababec92527b969 Mon Sep 17 00:00:00 2001
From: Nadrieril <nadrieril+git@gmail.com>
Date: Fri, 16 Feb 2024 02:57:24 +0100
Subject: [PATCH] Don't bother to save a block

---
 .../rustc_mir_build/src/build/matches/mod.rs  |   4 -
 .../issue_101867.main.built.after.mir         |  20 ++-
 .../building/issue_49232.main.built.after.mir |  34 ++--
 ...n_conditional.test_complex.built.after.mir | 150 ++++++++++--------
 ...se_edges.full_tested_match.built.after.mir |  58 ++++---
 ...e_edges.full_tested_match2.built.after.mir |  58 ++++---
 .../match_false_edges.main.built.after.mir    |  86 +++++-----
 .../simple_match.match_bool.built.after.mir   |  18 ++-
 ...e_out.move_out_by_subslice.built.after.mir |  34 ++--
 ...move_out.move_out_from_end.built.after.mir |  34 ++--
 tests/mir-opt/issue_72181.bar.built.after.mir |   4 +
 .../mir-opt/issue_72181.main.built.after.mir  |  16 +-
 tests/mir-opt/issue_91633.bar.built.after.mir |  14 +-
 tests/mir-opt/issue_91633.hey.built.after.mir |   8 +-
 .../issue_99325.main.built.after.32bit.mir    | 100 ++++++------
 .../issue_99325.main.built.after.64bit.mir    | 100 ++++++------
 16 files changed, 425 insertions(+), 313 deletions(-)

diff --git a/compiler/rustc_mir_build/src/build/matches/mod.rs b/compiler/rustc_mir_build/src/build/matches/mod.rs
index 35f5a6bfac5..0f681801815 100644
--- a/compiler/rustc_mir_build/src/build/matches/mod.rs
+++ b/compiler/rustc_mir_build/src/build/matches/mod.rs
@@ -1226,10 +1226,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             if let Some(last_otherwise_block) = otherwise_block {
                 last_otherwise_block
             } else {
-                // Any remaining candidates are unreachable.
-                if unmatched_candidates.is_empty() {
-                    return;
-                }
                 self.cfg.start_new_block()
             }
         } else {
diff --git a/tests/mir-opt/building/issue_101867.main.built.after.mir b/tests/mir-opt/building/issue_101867.main.built.after.mir
index 028d7ee7cd8..19a777cb03b 100644
--- a/tests/mir-opt/building/issue_101867.main.built.after.mir
+++ b/tests/mir-opt/building/issue_101867.main.built.after.mir
@@ -27,13 +27,13 @@ fn main() -> () {
         StorageLive(_5);
         PlaceMention(_1);
         _6 = discriminant(_1);
-        switchInt(move _6) -> [1: bb5, otherwise: bb4];
+        switchInt(move _6) -> [1: bb6, otherwise: bb4];
     }
 
     bb1: {
         StorageLive(_3);
         StorageLive(_4);
-        _4 = begin_panic::<&str>(const "explicit panic") -> bb8;
+        _4 = begin_panic::<&str>(const "explicit panic") -> bb10;
     }
 
     bb2: {
@@ -48,14 +48,22 @@ fn main() -> () {
     }
 
     bb4: {
-        goto -> bb7;
+        goto -> bb9;
     }
 
     bb5: {
-        falseEdge -> [real: bb6, imaginary: bb4];
+        goto -> bb3;
     }
 
     bb6: {
+        falseEdge -> [real: bb8, imaginary: bb4];
+    }
+
+    bb7: {
+        goto -> bb4;
+    }
+
+    bb8: {
         _5 = ((_1 as Some).0: u8);
         _0 = const ();
         StorageDead(_5);
@@ -63,12 +71,12 @@ fn main() -> () {
         return;
     }
 
-    bb7: {
+    bb9: {
         StorageDead(_5);
         goto -> bb1;
     }
 
-    bb8 (cleanup): {
+    bb10 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/issue_49232.main.built.after.mir b/tests/mir-opt/building/issue_49232.main.built.after.mir
index 7c1f5a6ec72..d09a1748a8b 100644
--- a/tests/mir-opt/building/issue_49232.main.built.after.mir
+++ b/tests/mir-opt/building/issue_49232.main.built.after.mir
@@ -17,7 +17,7 @@ fn main() -> () {
     }
 
     bb1: {
-        falseUnwind -> [real: bb2, unwind: bb12];
+        falseUnwind -> [real: bb2, unwind: bb14];
     }
 
     bb2: {
@@ -25,7 +25,7 @@ fn main() -> () {
         StorageLive(_3);
         _3 = const true;
         PlaceMention(_3);
-        switchInt(_3) -> [0: bb4, otherwise: bb5];
+        switchInt(_3) -> [0: bb4, otherwise: bb6];
     }
 
     bb3: {
@@ -34,37 +34,45 @@ fn main() -> () {
     }
 
     bb4: {
-        falseEdge -> [real: bb6, imaginary: bb5];
+        falseEdge -> [real: bb8, imaginary: bb6];
     }
 
     bb5: {
-        _0 = const ();
-        goto -> bb11;
+        goto -> bb3;
     }
 
     bb6: {
-        _2 = const 4_i32;
-        goto -> bb9;
+        _0 = const ();
+        goto -> bb13;
     }
 
     bb7: {
-        unreachable;
+        goto -> bb3;
     }
 
     bb8: {
-        goto -> bb9;
+        _2 = const 4_i32;
+        goto -> bb11;
     }
 
     bb9: {
+        unreachable;
+    }
+
+    bb10: {
+        goto -> bb11;
+    }
+
+    bb11: {
         FakeRead(ForLet(None), _2);
         StorageDead(_3);
         StorageLive(_5);
         StorageLive(_6);
         _6 = &_2;
-        _5 = std::mem::drop::<&i32>(move _6) -> [return: bb10, unwind: bb12];
+        _5 = std::mem::drop::<&i32>(move _6) -> [return: bb12, unwind: bb14];
     }
 
-    bb10: {
+    bb12: {
         StorageDead(_6);
         StorageDead(_5);
         _1 = const ();
@@ -72,13 +80,13 @@ fn main() -> () {
         goto -> bb1;
     }
 
-    bb11: {
+    bb13: {
         StorageDead(_3);
         StorageDead(_2);
         return;
     }
 
-    bb12 (cleanup): {
+    bb14 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/logical_or_in_conditional.test_complex.built.after.mir b/tests/mir-opt/building/logical_or_in_conditional.test_complex.built.after.mir
index d7c758d8876..89572177b1d 100644
--- a/tests/mir-opt/building/logical_or_in_conditional.test_complex.built.after.mir
+++ b/tests/mir-opt/building/logical_or_in_conditional.test_complex.built.after.mir
@@ -19,13 +19,13 @@ fn test_complex() -> () {
     bb0: {
         StorageLive(_1);
         StorageLive(_2);
-        _2 = E::f() -> [return: bb1, unwind: bb33];
+        _2 = E::f() -> [return: bb1, unwind: bb37];
     }
 
     bb1: {
         PlaceMention(_2);
         _3 = discriminant(_2);
-        switchInt(move _3) -> [0: bb4, otherwise: bb3];
+        switchInt(move _3) -> [0: bb5, otherwise: bb3];
     }
 
     bb2: {
@@ -34,163 +34,179 @@ fn test_complex() -> () {
     }
 
     bb3: {
-        goto -> bb20;
+        goto -> bb22;
     }
 
     bb4: {
-        falseEdge -> [real: bb5, imaginary: bb3];
+        goto -> bb2;
     }
 
     bb5: {
-        StorageLive(_4);
-        _4 = always_true() -> [return: bb6, unwind: bb33];
+        falseEdge -> [real: bb7, imaginary: bb3];
     }
 
     bb6: {
-        switchInt(move _4) -> [0: bb8, otherwise: bb7];
+        goto -> bb3;
     }
 
     bb7: {
+        StorageLive(_4);
+        _4 = always_true() -> [return: bb8, unwind: bb37];
+    }
+
+    bb8: {
+        switchInt(move _4) -> [0: bb10, otherwise: bb9];
+    }
+
+    bb9: {
         StorageLive(_5);
         StorageLive(_6);
         StorageLive(_7);
         _7 = Droppy(const 0_u8);
         _6 = (_7.0: u8);
         _5 = Gt(move _6, const 0_u8);
-        switchInt(move _5) -> [0: bb10, otherwise: bb9];
-    }
-
-    bb8: {
-        goto -> bb14;
-    }
-
-    bb9: {
-        drop(_7) -> [return: bb11, unwind: bb33];
+        switchInt(move _5) -> [0: bb12, otherwise: bb11];
     }
 
     bb10: {
-        goto -> bb12;
+        goto -> bb16;
     }
 
     bb11: {
-        StorageDead(_7);
-        StorageDead(_6);
-        goto -> bb17;
+        drop(_7) -> [return: bb13, unwind: bb37];
     }
 
     bb12: {
-        drop(_7) -> [return: bb13, unwind: bb33];
+        goto -> bb14;
     }
 
     bb13: {
         StorageDead(_7);
         StorageDead(_6);
-        goto -> bb14;
+        goto -> bb19;
     }
 
     bb14: {
+        drop(_7) -> [return: bb15, unwind: bb37];
+    }
+
+    bb15: {
+        StorageDead(_7);
+        StorageDead(_6);
+        goto -> bb16;
+    }
+
+    bb16: {
         StorageLive(_8);
         StorageLive(_9);
         StorageLive(_10);
         _10 = Droppy(const 1_u8);
         _9 = (_10.0: u8);
         _8 = Gt(move _9, const 1_u8);
-        switchInt(move _8) -> [0: bb16, otherwise: bb15];
-    }
-
-    bb15: {
-        drop(_10) -> [return: bb17, unwind: bb33];
-    }
-
-    bb16: {
-        goto -> bb18;
+        switchInt(move _8) -> [0: bb18, otherwise: bb17];
     }
 
     bb17: {
-        StorageDead(_10);
-        StorageDead(_9);
-        _1 = const ();
-        goto -> bb21;
+        drop(_10) -> [return: bb19, unwind: bb37];
     }
 
     bb18: {
-        drop(_10) -> [return: bb19, unwind: bb33];
+        goto -> bb20;
     }
 
     bb19: {
         StorageDead(_10);
         StorageDead(_9);
-        goto -> bb20;
+        _1 = const ();
+        goto -> bb23;
     }
 
     bb20: {
-        _1 = const ();
-        goto -> bb21;
+        drop(_10) -> [return: bb21, unwind: bb37];
     }
 
     bb21: {
+        StorageDead(_10);
+        StorageDead(_9);
+        goto -> bb22;
+    }
+
+    bb22: {
+        _1 = const ();
+        goto -> bb23;
+    }
+
+    bb23: {
         StorageDead(_8);
         StorageDead(_5);
         StorageDead(_4);
         StorageDead(_2);
         StorageDead(_1);
         StorageLive(_11);
-        _11 = always_true() -> [return: bb22, unwind: bb33];
-    }
-
-    bb22: {
-        switchInt(move _11) -> [0: bb24, otherwise: bb23];
-    }
-
-    bb23: {
-        goto -> bb31;
+        _11 = always_true() -> [return: bb24, unwind: bb37];
     }
 
     bb24: {
-        goto -> bb25;
+        switchInt(move _11) -> [0: bb26, otherwise: bb25];
     }
 
     bb25: {
-        StorageLive(_12);
-        _12 = E::f() -> [return: bb26, unwind: bb33];
+        goto -> bb35;
     }
 
     bb26: {
-        PlaceMention(_12);
-        _13 = discriminant(_12);
-        switchInt(move _13) -> [1: bb29, otherwise: bb28];
+        goto -> bb27;
     }
 
     bb27: {
+        StorageLive(_12);
+        _12 = E::f() -> [return: bb28, unwind: bb37];
+    }
+
+    bb28: {
+        PlaceMention(_12);
+        _13 = discriminant(_12);
+        switchInt(move _13) -> [1: bb32, otherwise: bb30];
+    }
+
+    bb29: {
         FakeRead(ForMatchedPlace(None), _12);
         unreachable;
     }
 
-    bb28: {
-        goto -> bb31;
-    }
-
-    bb29: {
-        falseEdge -> [real: bb30, imaginary: bb28];
-    }
-
     bb30: {
-        _0 = const ();
-        goto -> bb32;
+        goto -> bb35;
     }
 
     bb31: {
-        _0 = const ();
-        goto -> bb32;
+        goto -> bb29;
     }
 
     bb32: {
+        falseEdge -> [real: bb34, imaginary: bb30];
+    }
+
+    bb33: {
+        goto -> bb30;
+    }
+
+    bb34: {
+        _0 = const ();
+        goto -> bb36;
+    }
+
+    bb35: {
+        _0 = const ();
+        goto -> bb36;
+    }
+
+    bb36: {
         StorageDead(_11);
         StorageDead(_12);
         return;
     }
 
-    bb33 (cleanup): {
+    bb37 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/match_false_edges.full_tested_match.built.after.mir b/tests/mir-opt/building/match_false_edges.full_tested_match.built.after.mir
index 88292dd0597..4e91eb6f76f 100644
--- a/tests/mir-opt/building/match_false_edges.full_tested_match.built.after.mir
+++ b/tests/mir-opt/building/match_false_edges.full_tested_match.built.after.mir
@@ -28,7 +28,7 @@ fn full_tested_match() -> () {
         _2 = Option::<i32>::Some(const 42_i32);
         PlaceMention(_2);
         _3 = discriminant(_2);
-        switchInt(move _3) -> [0: bb2, 1: bb3, otherwise: bb1];
+        switchInt(move _3) -> [0: bb2, 1: bb4, otherwise: bb1];
     }
 
     bb1: {
@@ -38,30 +38,38 @@ fn full_tested_match() -> () {
 
     bb2: {
         _1 = (const 3_i32, const 3_i32);
-        goto -> bb11;
+        goto -> bb13;
     }
 
     bb3: {
-        falseEdge -> [real: bb5, imaginary: bb4];
+        goto -> bb1;
     }
 
     bb4: {
-        falseEdge -> [real: bb10, imaginary: bb2];
+        falseEdge -> [real: bb7, imaginary: bb5];
     }
 
     bb5: {
+        falseEdge -> [real: bb12, imaginary: bb2];
+    }
+
+    bb6: {
+        goto -> bb1;
+    }
+
+    bb7: {
         StorageLive(_6);
         _6 = &((_2 as Some).0: i32);
         _4 = &fake _2;
         StorageLive(_7);
-        _7 = guard() -> [return: bb6, unwind: bb13];
+        _7 = guard() -> [return: bb8, unwind: bb16];
     }
 
-    bb6: {
-        switchInt(move _7) -> [0: bb8, otherwise: bb7];
+    bb8: {
+        switchInt(move _7) -> [0: bb10, otherwise: bb9];
     }
 
-    bb7: {
+    bb9: {
         StorageDead(_7);
         FakeRead(ForMatchGuard, _4);
         FakeRead(ForGuardBinding, _6);
@@ -73,20 +81,20 @@ fn full_tested_match() -> () {
         StorageDead(_8);
         StorageDead(_5);
         StorageDead(_6);
-        goto -> bb11;
-    }
-
-    bb8: {
-        goto -> bb9;
-    }
-
-    bb9: {
-        StorageDead(_7);
-        StorageDead(_6);
-        goto -> bb4;
+        goto -> bb13;
     }
 
     bb10: {
+        goto -> bb11;
+    }
+
+    bb11: {
+        StorageDead(_7);
+        StorageDead(_6);
+        goto -> bb5;
+    }
+
+    bb12: {
         StorageLive(_9);
         _9 = ((_2 as Some).0: i32);
         StorageLive(_10);
@@ -94,10 +102,10 @@ fn full_tested_match() -> () {
         _1 = (const 2_i32, move _10);
         StorageDead(_10);
         StorageDead(_9);
-        goto -> bb11;
+        goto -> bb13;
     }
 
-    bb11: {
+    bb13: {
         PlaceMention(_1);
         StorageDead(_2);
         StorageDead(_1);
@@ -105,12 +113,16 @@ fn full_tested_match() -> () {
         return;
     }
 
-    bb12: {
+    bb14: {
         FakeRead(ForMatchedPlace(None), _1);
         unreachable;
     }
 
-    bb13 (cleanup): {
+    bb15: {
+        goto -> bb14;
+    }
+
+    bb16 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/match_false_edges.full_tested_match2.built.after.mir b/tests/mir-opt/building/match_false_edges.full_tested_match2.built.after.mir
index 205bb4980d9..0c67cc9f71e 100644
--- a/tests/mir-opt/building/match_false_edges.full_tested_match2.built.after.mir
+++ b/tests/mir-opt/building/match_false_edges.full_tested_match2.built.after.mir
@@ -28,7 +28,7 @@ fn full_tested_match2() -> () {
         _2 = Option::<i32>::Some(const 42_i32);
         PlaceMention(_2);
         _3 = discriminant(_2);
-        switchInt(move _3) -> [0: bb2, 1: bb3, otherwise: bb1];
+        switchInt(move _3) -> [0: bb2, 1: bb4, otherwise: bb1];
     }
 
     bb1: {
@@ -37,14 +37,18 @@ fn full_tested_match2() -> () {
     }
 
     bb2: {
-        falseEdge -> [real: bb10, imaginary: bb4];
+        falseEdge -> [real: bb12, imaginary: bb5];
     }
 
     bb3: {
-        falseEdge -> [real: bb5, imaginary: bb2];
+        goto -> bb1;
     }
 
     bb4: {
+        falseEdge -> [real: bb7, imaginary: bb2];
+    }
+
+    bb5: {
         StorageLive(_9);
         _9 = ((_2 as Some).0: i32);
         StorageLive(_10);
@@ -52,22 +56,26 @@ fn full_tested_match2() -> () {
         _1 = (const 2_i32, move _10);
         StorageDead(_10);
         StorageDead(_9);
-        goto -> bb11;
+        goto -> bb13;
     }
 
-    bb5: {
+    bb6: {
+        goto -> bb1;
+    }
+
+    bb7: {
         StorageLive(_6);
         _6 = &((_2 as Some).0: i32);
         _4 = &fake _2;
         StorageLive(_7);
-        _7 = guard() -> [return: bb6, unwind: bb13];
+        _7 = guard() -> [return: bb8, unwind: bb16];
     }
 
-    bb6: {
-        switchInt(move _7) -> [0: bb8, otherwise: bb7];
+    bb8: {
+        switchInt(move _7) -> [0: bb10, otherwise: bb9];
     }
 
-    bb7: {
+    bb9: {
         StorageDead(_7);
         FakeRead(ForMatchGuard, _4);
         FakeRead(ForGuardBinding, _6);
@@ -79,25 +87,25 @@ fn full_tested_match2() -> () {
         StorageDead(_8);
         StorageDead(_5);
         StorageDead(_6);
-        goto -> bb11;
-    }
-
-    bb8: {
-        goto -> bb9;
-    }
-
-    bb9: {
-        StorageDead(_7);
-        StorageDead(_6);
-        falseEdge -> [real: bb4, imaginary: bb2];
+        goto -> bb13;
     }
 
     bb10: {
-        _1 = (const 3_i32, const 3_i32);
         goto -> bb11;
     }
 
     bb11: {
+        StorageDead(_7);
+        StorageDead(_6);
+        falseEdge -> [real: bb5, imaginary: bb2];
+    }
+
+    bb12: {
+        _1 = (const 3_i32, const 3_i32);
+        goto -> bb13;
+    }
+
+    bb13: {
         PlaceMention(_1);
         StorageDead(_2);
         StorageDead(_1);
@@ -105,12 +113,16 @@ fn full_tested_match2() -> () {
         return;
     }
 
-    bb12: {
+    bb14: {
         FakeRead(ForMatchedPlace(None), _1);
         unreachable;
     }
 
-    bb13 (cleanup): {
+    bb15: {
+        goto -> bb14;
+    }
+
+    bb16 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/match_false_edges.main.built.after.mir b/tests/mir-opt/building/match_false_edges.main.built.after.mir
index 21f377a6404..b71b2412cdf 100644
--- a/tests/mir-opt/building/match_false_edges.main.built.after.mir
+++ b/tests/mir-opt/building/match_false_edges.main.built.after.mir
@@ -39,7 +39,7 @@ fn main() -> () {
         _2 = Option::<i32>::Some(const 1_i32);
         PlaceMention(_2);
         _4 = discriminant(_2);
-        switchInt(move _4) -> [1: bb7, otherwise: bb2];
+        switchInt(move _4) -> [1: bb8, otherwise: bb2];
     }
 
     bb1: {
@@ -48,12 +48,12 @@ fn main() -> () {
     }
 
     bb2: {
-        falseEdge -> [real: bb14, imaginary: bb5];
+        falseEdge -> [real: bb15, imaginary: bb6];
     }
 
     bb3: {
         _3 = discriminant(_2);
-        switchInt(move _3) -> [1: bb5, otherwise: bb4];
+        switchInt(move _3) -> [1: bb6, otherwise: bb4];
     }
 
     bb4: {
@@ -61,38 +61,42 @@ fn main() -> () {
         _14 = _2;
         _1 = const 4_i32;
         StorageDead(_14);
-        goto -> bb20;
+        goto -> bb21;
     }
 
     bb5: {
-        falseEdge -> [real: bb15, imaginary: bb4];
+        goto -> bb1;
     }
 
     bb6: {
-        goto -> bb4;
+        falseEdge -> [real: bb16, imaginary: bb4];
     }
 
     bb7: {
-        falseEdge -> [real: bb9, imaginary: bb2];
+        goto -> bb4;
     }
 
     bb8: {
-        goto -> bb2;
+        falseEdge -> [real: bb10, imaginary: bb2];
     }
 
     bb9: {
+        goto -> bb2;
+    }
+
+    bb10: {
         StorageLive(_7);
         _7 = &((_2 as Some).0: i32);
         _5 = &fake _2;
         StorageLive(_8);
-        _8 = guard() -> [return: bb10, unwind: bb22];
-    }
-
-    bb10: {
-        switchInt(move _8) -> [0: bb12, otherwise: bb11];
+        _8 = guard() -> [return: bb11, unwind: bb24];
     }
 
     bb11: {
+        switchInt(move _8) -> [0: bb13, otherwise: bb12];
+    }
+
+    bb12: {
         StorageDead(_8);
         FakeRead(ForMatchGuard, _5);
         FakeRead(ForGuardBinding, _7);
@@ -101,42 +105,42 @@ fn main() -> () {
         _1 = const 1_i32;
         StorageDead(_6);
         StorageDead(_7);
-        goto -> bb20;
-    }
-
-    bb12: {
-        goto -> bb13;
+        goto -> bb21;
     }
 
     bb13: {
-        StorageDead(_8);
-        StorageDead(_7);
-        falseEdge -> [real: bb8, imaginary: bb2];
+        goto -> bb14;
     }
 
     bb14: {
+        StorageDead(_8);
+        StorageDead(_7);
+        falseEdge -> [real: bb9, imaginary: bb2];
+    }
+
+    bb15: {
         StorageLive(_9);
         _9 = _2;
         _1 = const 2_i32;
         StorageDead(_9);
-        goto -> bb20;
+        goto -> bb21;
     }
 
-    bb15: {
+    bb16: {
         StorageLive(_11);
         _11 = &((_2 as Some).0: i32);
         _5 = &fake _2;
         StorageLive(_12);
         StorageLive(_13);
         _13 = (*_11);
-        _12 = guard2(move _13) -> [return: bb16, unwind: bb22];
-    }
-
-    bb16: {
-        switchInt(move _12) -> [0: bb18, otherwise: bb17];
+        _12 = guard2(move _13) -> [return: bb17, unwind: bb24];
     }
 
     bb17: {
+        switchInt(move _12) -> [0: bb19, otherwise: bb18];
+    }
+
+    bb18: {
         StorageDead(_13);
         StorageDead(_12);
         FakeRead(ForMatchGuard, _5);
@@ -146,21 +150,21 @@ fn main() -> () {
         _1 = const 3_i32;
         StorageDead(_10);
         StorageDead(_11);
-        goto -> bb20;
-    }
-
-    bb18: {
-        goto -> bb19;
+        goto -> bb21;
     }
 
     bb19: {
-        StorageDead(_13);
-        StorageDead(_12);
-        StorageDead(_11);
-        falseEdge -> [real: bb6, imaginary: bb4];
+        goto -> bb20;
     }
 
     bb20: {
+        StorageDead(_13);
+        StorageDead(_12);
+        StorageDead(_11);
+        falseEdge -> [real: bb7, imaginary: bb4];
+    }
+
+    bb21: {
         PlaceMention(_1);
         StorageDead(_2);
         StorageDead(_1);
@@ -168,12 +172,16 @@ fn main() -> () {
         return;
     }
 
-    bb21: {
+    bb22: {
         FakeRead(ForMatchedPlace(None), _1);
         unreachable;
     }
 
-    bb22 (cleanup): {
+    bb23: {
+        goto -> bb22;
+    }
+
+    bb24 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/simple_match.match_bool.built.after.mir b/tests/mir-opt/building/simple_match.match_bool.built.after.mir
index cd51c942bee..faa2456fd10 100644
--- a/tests/mir-opt/building/simple_match.match_bool.built.after.mir
+++ b/tests/mir-opt/building/simple_match.match_bool.built.after.mir
@@ -6,7 +6,7 @@ fn match_bool(_1: bool) -> usize {
 
     bb0: {
         PlaceMention(_1);
-        switchInt(_1) -> [0: bb2, otherwise: bb3];
+        switchInt(_1) -> [0: bb2, otherwise: bb4];
     }
 
     bb1: {
@@ -16,19 +16,27 @@ fn match_bool(_1: bool) -> usize {
 
     bb2: {
         _0 = const 20_usize;
-        goto -> bb5;
+        goto -> bb7;
     }
 
     bb3: {
-        falseEdge -> [real: bb4, imaginary: bb2];
+        goto -> bb1;
     }
 
     bb4: {
-        _0 = const 10_usize;
-        goto -> bb5;
+        falseEdge -> [real: bb6, imaginary: bb2];
     }
 
     bb5: {
+        goto -> bb2;
+    }
+
+    bb6: {
+        _0 = const 10_usize;
+        goto -> bb7;
+    }
+
+    bb7: {
         return;
     }
 }
diff --git a/tests/mir-opt/building/uniform_array_move_out.move_out_by_subslice.built.after.mir b/tests/mir-opt/building/uniform_array_move_out.move_out_by_subslice.built.after.mir
index 282c9704ffc..128af9c5602 100644
--- a/tests/mir-opt/building/uniform_array_move_out.move_out_by_subslice.built.after.mir
+++ b/tests/mir-opt/building/uniform_array_move_out.move_out_by_subslice.built.after.mir
@@ -30,7 +30,7 @@ fn move_out_by_subslice() -> () {
         StorageLive(_2);
         _3 = SizeOf(i32);
         _4 = AlignOf(i32);
-        _5 = alloc::alloc::exchange_malloc(move _3, move _4) -> [return: bb1, unwind: bb13];
+        _5 = alloc::alloc::exchange_malloc(move _3, move _4) -> [return: bb1, unwind: bb14];
     }
 
     bb1: {
@@ -38,7 +38,7 @@ fn move_out_by_subslice() -> () {
         _6 = ShallowInitBox(move _5, i32);
         (*_6) = const 1_i32;
         _2 = move _6;
-        drop(_6) -> [return: bb2, unwind: bb12];
+        drop(_6) -> [return: bb2, unwind: bb13];
     }
 
     bb2: {
@@ -46,7 +46,7 @@ fn move_out_by_subslice() -> () {
         StorageLive(_7);
         _8 = SizeOf(i32);
         _9 = AlignOf(i32);
-        _10 = alloc::alloc::exchange_malloc(move _8, move _9) -> [return: bb3, unwind: bb12];
+        _10 = alloc::alloc::exchange_malloc(move _8, move _9) -> [return: bb3, unwind: bb13];
     }
 
     bb3: {
@@ -54,18 +54,18 @@ fn move_out_by_subslice() -> () {
         _11 = ShallowInitBox(move _10, i32);
         (*_11) = const 2_i32;
         _7 = move _11;
-        drop(_11) -> [return: bb4, unwind: bb11];
+        drop(_11) -> [return: bb4, unwind: bb12];
     }
 
     bb4: {
         StorageDead(_11);
         _1 = [move _2, move _7];
-        drop(_7) -> [return: bb5, unwind: bb12];
+        drop(_7) -> [return: bb5, unwind: bb13];
     }
 
     bb5: {
         StorageDead(_7);
-        drop(_2) -> [return: bb6, unwind: bb13];
+        drop(_2) -> [return: bb6, unwind: bb14];
     }
 
     bb6: {
@@ -75,7 +75,7 @@ fn move_out_by_subslice() -> () {
         StorageLive(_12);
         _12 = move _1[0..2];
         _0 = const ();
-        drop(_12) -> [return: bb8, unwind: bb10];
+        drop(_12) -> [return: bb9, unwind: bb11];
     }
 
     bb7: {
@@ -84,28 +84,32 @@ fn move_out_by_subslice() -> () {
     }
 
     bb8: {
-        StorageDead(_12);
-        drop(_1) -> [return: bb9, unwind: bb13];
+        goto -> bb7;
     }
 
     bb9: {
+        StorageDead(_12);
+        drop(_1) -> [return: bb10, unwind: bb14];
+    }
+
+    bb10: {
         StorageDead(_1);
         return;
     }
 
-    bb10 (cleanup): {
-        drop(_1) -> [return: bb13, unwind terminate(cleanup)];
-    }
-
     bb11 (cleanup): {
-        drop(_7) -> [return: bb12, unwind terminate(cleanup)];
+        drop(_1) -> [return: bb14, unwind terminate(cleanup)];
     }
 
     bb12 (cleanup): {
-        drop(_2) -> [return: bb13, unwind terminate(cleanup)];
+        drop(_7) -> [return: bb13, unwind terminate(cleanup)];
     }
 
     bb13 (cleanup): {
+        drop(_2) -> [return: bb14, unwind terminate(cleanup)];
+    }
+
+    bb14 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/building/uniform_array_move_out.move_out_from_end.built.after.mir b/tests/mir-opt/building/uniform_array_move_out.move_out_from_end.built.after.mir
index d1956c91b88..d50a6872a41 100644
--- a/tests/mir-opt/building/uniform_array_move_out.move_out_from_end.built.after.mir
+++ b/tests/mir-opt/building/uniform_array_move_out.move_out_from_end.built.after.mir
@@ -30,7 +30,7 @@ fn move_out_from_end() -> () {
         StorageLive(_2);
         _3 = SizeOf(i32);
         _4 = AlignOf(i32);
-        _5 = alloc::alloc::exchange_malloc(move _3, move _4) -> [return: bb1, unwind: bb13];
+        _5 = alloc::alloc::exchange_malloc(move _3, move _4) -> [return: bb1, unwind: bb14];
     }
 
     bb1: {
@@ -38,7 +38,7 @@ fn move_out_from_end() -> () {
         _6 = ShallowInitBox(move _5, i32);
         (*_6) = const 1_i32;
         _2 = move _6;
-        drop(_6) -> [return: bb2, unwind: bb12];
+        drop(_6) -> [return: bb2, unwind: bb13];
     }
 
     bb2: {
@@ -46,7 +46,7 @@ fn move_out_from_end() -> () {
         StorageLive(_7);
         _8 = SizeOf(i32);
         _9 = AlignOf(i32);
-        _10 = alloc::alloc::exchange_malloc(move _8, move _9) -> [return: bb3, unwind: bb12];
+        _10 = alloc::alloc::exchange_malloc(move _8, move _9) -> [return: bb3, unwind: bb13];
     }
 
     bb3: {
@@ -54,18 +54,18 @@ fn move_out_from_end() -> () {
         _11 = ShallowInitBox(move _10, i32);
         (*_11) = const 2_i32;
         _7 = move _11;
-        drop(_11) -> [return: bb4, unwind: bb11];
+        drop(_11) -> [return: bb4, unwind: bb12];
     }
 
     bb4: {
         StorageDead(_11);
         _1 = [move _2, move _7];
-        drop(_7) -> [return: bb5, unwind: bb12];
+        drop(_7) -> [return: bb5, unwind: bb13];
     }
 
     bb5: {
         StorageDead(_7);
-        drop(_2) -> [return: bb6, unwind: bb13];
+        drop(_2) -> [return: bb6, unwind: bb14];
     }
 
     bb6: {
@@ -75,7 +75,7 @@ fn move_out_from_end() -> () {
         StorageLive(_12);
         _12 = move _1[1 of 2];
         _0 = const ();
-        drop(_12) -> [return: bb8, unwind: bb10];
+        drop(_12) -> [return: bb9, unwind: bb11];
     }
 
     bb7: {
@@ -84,28 +84,32 @@ fn move_out_from_end() -> () {
     }
 
     bb8: {
-        StorageDead(_12);
-        drop(_1) -> [return: bb9, unwind: bb13];
+        goto -> bb7;
     }
 
     bb9: {
+        StorageDead(_12);
+        drop(_1) -> [return: bb10, unwind: bb14];
+    }
+
+    bb10: {
         StorageDead(_1);
         return;
     }
 
-    bb10 (cleanup): {
-        drop(_1) -> [return: bb13, unwind terminate(cleanup)];
-    }
-
     bb11 (cleanup): {
-        drop(_7) -> [return: bb12, unwind terminate(cleanup)];
+        drop(_1) -> [return: bb14, unwind terminate(cleanup)];
     }
 
     bb12 (cleanup): {
-        drop(_2) -> [return: bb13, unwind terminate(cleanup)];
+        drop(_7) -> [return: bb13, unwind terminate(cleanup)];
     }
 
     bb13 (cleanup): {
+        drop(_2) -> [return: bb14, unwind terminate(cleanup)];
+    }
+
+    bb14 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/issue_72181.bar.built.after.mir b/tests/mir-opt/issue_72181.bar.built.after.mir
index b6cc7d22195..3ab9152f8bb 100644
--- a/tests/mir-opt/issue_72181.bar.built.after.mir
+++ b/tests/mir-opt/issue_72181.bar.built.after.mir
@@ -19,4 +19,8 @@ fn bar(_1: [(Never, u32); 1]) -> u32 {
         FakeRead(ForMatchedPlace(None), _1);
         unreachable;
     }
+
+    bb2: {
+        goto -> bb1;
+    }
 }
diff --git a/tests/mir-opt/issue_72181.main.built.after.mir b/tests/mir-opt/issue_72181.main.built.after.mir
index 12c4a2b6325..cff20702bf7 100644
--- a/tests/mir-opt/issue_72181.main.built.after.mir
+++ b/tests/mir-opt/issue_72181.main.built.after.mir
@@ -22,7 +22,7 @@ fn main() -> () {
 
     bb0: {
         StorageLive(_1);
-        _1 = std::mem::size_of::<Foo>() -> [return: bb1, unwind: bb5];
+        _1 = std::mem::size_of::<Foo>() -> [return: bb1, unwind: bb7];
     }
 
     bb1: {
@@ -42,7 +42,7 @@ fn main() -> () {
         _6 = const 0_usize;
         _7 = Len(_2);
         _8 = Lt(_6, _7);
-        assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, _6) -> [success: bb3, unwind: bb5];
+        assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, _6) -> [success: bb4, unwind: bb7];
     }
 
     bb2: {
@@ -51,6 +51,10 @@ fn main() -> () {
     }
 
     bb3: {
+        goto -> bb2;
+    }
+
+    bb4: {
         _5 = (_2[_6].0: u64);
         PlaceMention(_5);
         StorageDead(_6);
@@ -60,12 +64,16 @@ fn main() -> () {
         return;
     }
 
-    bb4: {
+    bb5: {
         FakeRead(ForMatchedPlace(None), _5);
         unreachable;
     }
 
-    bb5 (cleanup): {
+    bb6: {
+        goto -> bb5;
+    }
+
+    bb7 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/issue_91633.bar.built.after.mir b/tests/mir-opt/issue_91633.bar.built.after.mir
index 53829588a1b..3dcdcab9dea 100644
--- a/tests/mir-opt/issue_91633.bar.built.after.mir
+++ b/tests/mir-opt/issue_91633.bar.built.after.mir
@@ -12,7 +12,7 @@ fn bar(_1: Box<[T]>) -> () {
         StorageLive(_2);
         StorageLive(_3);
         _3 = &(*_1);
-        _2 = <[T] as Index<usize>>::index(move _3, const 0_usize) -> [return: bb1, unwind: bb4];
+        _2 = <[T] as Index<usize>>::index(move _3, const 0_usize) -> [return: bb1, unwind: bb5];
     }
 
     bb1: {
@@ -20,7 +20,7 @@ fn bar(_1: Box<[T]>) -> () {
         PlaceMention((*_2));
         StorageDead(_2);
         _0 = const ();
-        drop(_1) -> [return: bb3, unwind: bb5];
+        drop(_1) -> [return: bb4, unwind: bb6];
     }
 
     bb2: {
@@ -29,14 +29,18 @@ fn bar(_1: Box<[T]>) -> () {
     }
 
     bb3: {
+        goto -> bb2;
+    }
+
+    bb4: {
         return;
     }
 
-    bb4 (cleanup): {
-        drop(_1) -> [return: bb5, unwind terminate(cleanup)];
+    bb5 (cleanup): {
+        drop(_1) -> [return: bb6, unwind terminate(cleanup)];
     }
 
-    bb5 (cleanup): {
+    bb6 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/issue_91633.hey.built.after.mir b/tests/mir-opt/issue_91633.hey.built.after.mir
index a537e509996..e782f4d1a23 100644
--- a/tests/mir-opt/issue_91633.hey.built.after.mir
+++ b/tests/mir-opt/issue_91633.hey.built.after.mir
@@ -14,7 +14,7 @@ fn hey(_1: &[T]) -> () {
         StorageLive(_3);
         StorageLive(_4);
         _4 = &(*_1);
-        _3 = <[T] as Index<usize>>::index(move _4, const 0_usize) -> [return: bb1, unwind: bb3];
+        _3 = <[T] as Index<usize>>::index(move _4, const 0_usize) -> [return: bb1, unwind: bb4];
     }
 
     bb1: {
@@ -32,7 +32,11 @@ fn hey(_1: &[T]) -> () {
         unreachable;
     }
 
-    bb3 (cleanup): {
+    bb3: {
+        goto -> bb2;
+    }
+
+    bb4 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/issue_99325.main.built.after.32bit.mir b/tests/mir-opt/issue_99325.main.built.after.32bit.mir
index 53254f76dbc..f8e195466ee 100644
--- a/tests/mir-opt/issue_99325.main.built.after.32bit.mir
+++ b/tests/mir-opt/issue_99325.main.built.after.32bit.mir
@@ -67,7 +67,7 @@ fn main() -> () {
         StorageLive(_2);
         StorageLive(_3);
         StorageLive(_4);
-        _4 = function_with_bytes::<&*b"AAAA">() -> [return: bb1, unwind: bb23];
+        _4 = function_with_bytes::<&*b"AAAA">() -> [return: bb1, unwind: bb25];
     }
 
     bb1: {
@@ -91,7 +91,7 @@ fn main() -> () {
         _11 = &(*_8);
         StorageLive(_12);
         _12 = &(*_9);
-        _10 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _11, move _12) -> [return: bb3, unwind: bb23];
+        _10 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _11, move _12) -> [return: bb4, unwind: bb25];
     }
 
     bb2: {
@@ -100,20 +100,24 @@ fn main() -> () {
     }
 
     bb3: {
-        switchInt(move _10) -> [0: bb5, otherwise: bb4];
+        goto -> bb2;
     }
 
     bb4: {
-        StorageDead(_12);
-        StorageDead(_11);
-        goto -> bb9;
+        switchInt(move _10) -> [0: bb6, otherwise: bb5];
     }
 
     bb5: {
-        goto -> bb6;
+        StorageDead(_12);
+        StorageDead(_11);
+        goto -> bb10;
     }
 
     bb6: {
+        goto -> bb7;
+    }
+
+    bb7: {
         StorageDead(_12);
         StorageDead(_11);
         StorageLive(_14);
@@ -132,10 +136,10 @@ fn main() -> () {
         _19 = &(*_20);
         StorageLive(_21);
         _21 = Option::<Arguments<'_>>::None;
-        _15 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _16, move _17, move _19, move _21) -> bb23;
+        _15 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _16, move _17, move _19, move _21) -> bb25;
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_21);
         StorageDead(_19);
         StorageDead(_17);
@@ -147,23 +151,23 @@ fn main() -> () {
         unreachable;
     }
 
-    bb8: {
-        goto -> bb10;
-    }
-
     bb9: {
-        _1 = const ();
-        goto -> bb10;
+        goto -> bb11;
     }
 
     bb10: {
-        StorageDead(_10);
-        StorageDead(_9);
-        StorageDead(_8);
+        _1 = const ();
         goto -> bb11;
     }
 
     bb11: {
+        StorageDead(_10);
+        StorageDead(_9);
+        StorageDead(_8);
+        goto -> bb12;
+    }
+
+    bb12: {
         StorageDead(_7);
         StorageDead(_6);
         StorageDead(_4);
@@ -173,10 +177,10 @@ fn main() -> () {
         StorageLive(_23);
         StorageLive(_24);
         StorageLive(_25);
-        _25 = function_with_bytes::<&*b"AAAA">() -> [return: bb12, unwind: bb23];
+        _25 = function_with_bytes::<&*b"AAAA">() -> [return: bb13, unwind: bb25];
     }
 
-    bb12: {
+    bb13: {
         _24 = &_25;
         StorageLive(_26);
         StorageLive(_27);
@@ -195,29 +199,33 @@ fn main() -> () {
         _31 = &(*_28);
         StorageLive(_32);
         _32 = &(*_29);
-        _30 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _31, move _32) -> [return: bb14, unwind: bb23];
+        _30 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _31, move _32) -> [return: bb16, unwind: bb25];
     }
 
-    bb13: {
+    bb14: {
         FakeRead(ForMatchedPlace(None), _23);
         unreachable;
     }
 
-    bb14: {
-        switchInt(move _30) -> [0: bb16, otherwise: bb15];
-    }
-
     bb15: {
-        StorageDead(_32);
-        StorageDead(_31);
-        goto -> bb20;
+        goto -> bb14;
     }
 
     bb16: {
-        goto -> bb17;
+        switchInt(move _30) -> [0: bb18, otherwise: bb17];
     }
 
     bb17: {
+        StorageDead(_32);
+        StorageDead(_31);
+        goto -> bb22;
+    }
+
+    bb18: {
+        goto -> bb19;
+    }
+
+    bb19: {
         StorageDead(_32);
         StorageDead(_31);
         StorageLive(_34);
@@ -236,10 +244,10 @@ fn main() -> () {
         _39 = &(*_40);
         StorageLive(_41);
         _41 = Option::<Arguments<'_>>::None;
-        _35 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _36, move _37, move _39, move _41) -> bb23;
+        _35 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _36, move _37, move _39, move _41) -> bb25;
     }
 
-    bb18: {
+    bb20: {
         StorageDead(_41);
         StorageDead(_39);
         StorageDead(_37);
@@ -251,23 +259,23 @@ fn main() -> () {
         unreachable;
     }
 
-    bb19: {
-        goto -> bb21;
-    }
-
-    bb20: {
-        _22 = const ();
-        goto -> bb21;
-    }
-
     bb21: {
-        StorageDead(_30);
-        StorageDead(_29);
-        StorageDead(_28);
-        goto -> bb22;
+        goto -> bb23;
     }
 
     bb22: {
+        _22 = const ();
+        goto -> bb23;
+    }
+
+    bb23: {
+        StorageDead(_30);
+        StorageDead(_29);
+        StorageDead(_28);
+        goto -> bb24;
+    }
+
+    bb24: {
         StorageDead(_27);
         StorageDead(_25);
         StorageDead(_23);
@@ -276,7 +284,7 @@ fn main() -> () {
         return;
     }
 
-    bb23 (cleanup): {
+    bb25 (cleanup): {
         resume;
     }
 }
diff --git a/tests/mir-opt/issue_99325.main.built.after.64bit.mir b/tests/mir-opt/issue_99325.main.built.after.64bit.mir
index 53254f76dbc..f8e195466ee 100644
--- a/tests/mir-opt/issue_99325.main.built.after.64bit.mir
+++ b/tests/mir-opt/issue_99325.main.built.after.64bit.mir
@@ -67,7 +67,7 @@ fn main() -> () {
         StorageLive(_2);
         StorageLive(_3);
         StorageLive(_4);
-        _4 = function_with_bytes::<&*b"AAAA">() -> [return: bb1, unwind: bb23];
+        _4 = function_with_bytes::<&*b"AAAA">() -> [return: bb1, unwind: bb25];
     }
 
     bb1: {
@@ -91,7 +91,7 @@ fn main() -> () {
         _11 = &(*_8);
         StorageLive(_12);
         _12 = &(*_9);
-        _10 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _11, move _12) -> [return: bb3, unwind: bb23];
+        _10 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _11, move _12) -> [return: bb4, unwind: bb25];
     }
 
     bb2: {
@@ -100,20 +100,24 @@ fn main() -> () {
     }
 
     bb3: {
-        switchInt(move _10) -> [0: bb5, otherwise: bb4];
+        goto -> bb2;
     }
 
     bb4: {
-        StorageDead(_12);
-        StorageDead(_11);
-        goto -> bb9;
+        switchInt(move _10) -> [0: bb6, otherwise: bb5];
     }
 
     bb5: {
-        goto -> bb6;
+        StorageDead(_12);
+        StorageDead(_11);
+        goto -> bb10;
     }
 
     bb6: {
+        goto -> bb7;
+    }
+
+    bb7: {
         StorageDead(_12);
         StorageDead(_11);
         StorageLive(_14);
@@ -132,10 +136,10 @@ fn main() -> () {
         _19 = &(*_20);
         StorageLive(_21);
         _21 = Option::<Arguments<'_>>::None;
-        _15 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _16, move _17, move _19, move _21) -> bb23;
+        _15 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _16, move _17, move _19, move _21) -> bb25;
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_21);
         StorageDead(_19);
         StorageDead(_17);
@@ -147,23 +151,23 @@ fn main() -> () {
         unreachable;
     }
 
-    bb8: {
-        goto -> bb10;
-    }
-
     bb9: {
-        _1 = const ();
-        goto -> bb10;
+        goto -> bb11;
     }
 
     bb10: {
-        StorageDead(_10);
-        StorageDead(_9);
-        StorageDead(_8);
+        _1 = const ();
         goto -> bb11;
     }
 
     bb11: {
+        StorageDead(_10);
+        StorageDead(_9);
+        StorageDead(_8);
+        goto -> bb12;
+    }
+
+    bb12: {
         StorageDead(_7);
         StorageDead(_6);
         StorageDead(_4);
@@ -173,10 +177,10 @@ fn main() -> () {
         StorageLive(_23);
         StorageLive(_24);
         StorageLive(_25);
-        _25 = function_with_bytes::<&*b"AAAA">() -> [return: bb12, unwind: bb23];
+        _25 = function_with_bytes::<&*b"AAAA">() -> [return: bb13, unwind: bb25];
     }
 
-    bb12: {
+    bb13: {
         _24 = &_25;
         StorageLive(_26);
         StorageLive(_27);
@@ -195,29 +199,33 @@ fn main() -> () {
         _31 = &(*_28);
         StorageLive(_32);
         _32 = &(*_29);
-        _30 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _31, move _32) -> [return: bb14, unwind: bb23];
+        _30 = <&[u8] as PartialEq<&[u8; 4]>>::eq(move _31, move _32) -> [return: bb16, unwind: bb25];
     }
 
-    bb13: {
+    bb14: {
         FakeRead(ForMatchedPlace(None), _23);
         unreachable;
     }
 
-    bb14: {
-        switchInt(move _30) -> [0: bb16, otherwise: bb15];
-    }
-
     bb15: {
-        StorageDead(_32);
-        StorageDead(_31);
-        goto -> bb20;
+        goto -> bb14;
     }
 
     bb16: {
-        goto -> bb17;
+        switchInt(move _30) -> [0: bb18, otherwise: bb17];
     }
 
     bb17: {
+        StorageDead(_32);
+        StorageDead(_31);
+        goto -> bb22;
+    }
+
+    bb18: {
+        goto -> bb19;
+    }
+
+    bb19: {
         StorageDead(_32);
         StorageDead(_31);
         StorageLive(_34);
@@ -236,10 +244,10 @@ fn main() -> () {
         _39 = &(*_40);
         StorageLive(_41);
         _41 = Option::<Arguments<'_>>::None;
-        _35 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _36, move _37, move _39, move _41) -> bb23;
+        _35 = core::panicking::assert_failed::<&[u8], &[u8; 4]>(move _36, move _37, move _39, move _41) -> bb25;
     }
 
-    bb18: {
+    bb20: {
         StorageDead(_41);
         StorageDead(_39);
         StorageDead(_37);
@@ -251,23 +259,23 @@ fn main() -> () {
         unreachable;
     }
 
-    bb19: {
-        goto -> bb21;
-    }
-
-    bb20: {
-        _22 = const ();
-        goto -> bb21;
-    }
-
     bb21: {
-        StorageDead(_30);
-        StorageDead(_29);
-        StorageDead(_28);
-        goto -> bb22;
+        goto -> bb23;
     }
 
     bb22: {
+        _22 = const ();
+        goto -> bb23;
+    }
+
+    bb23: {
+        StorageDead(_30);
+        StorageDead(_29);
+        StorageDead(_28);
+        goto -> bb24;
+    }
+
+    bb24: {
         StorageDead(_27);
         StorageDead(_25);
         StorageDead(_23);
@@ -276,7 +284,7 @@ fn main() -> () {
         return;
     }
 
-    bb23 (cleanup): {
+    bb25 (cleanup): {
         resume;
     }
 }