Auto merge of #73081 - Dylan-DPC:rollup-1aqk215, r=Dylan-DPC

Rollup of 5 pull requests

Successful merges:

 - #72810 (validate basic sanity for TerminatorKind)
 - #72989 (Revert pr 71840)
 - #72993 (Count the beta prerelease number just from master)
 - #73057 (Clean up E0644 explanation)
 - #73059 (remove outdated comment)

Failed merges:

r? @ghost

src/bootstrap/lib.rs

@@ -963,29 +963,15 @@ fn beta_prerelease_version(&self) -> u32 {
             return s;
         }
 
-        let beta = output(
-            Command::new("git").arg("ls-remote").arg("origin").arg("beta").current_dir(&self.src),
-        );
-        let beta = beta.trim().split_whitespace().next().unwrap();
-        let master = output(
-            Command::new("git").arg("ls-remote").arg("origin").arg("master").current_dir(&self.src),
-        );
-        let master = master.trim().split_whitespace().next().unwrap();
-
-        // Figure out where the current beta branch started.
-        let base = output(
-            Command::new("git").arg("merge-base").arg(beta).arg(master).current_dir(&self.src),
-        );
-        let base = base.trim();
-
-        // Next figure out how many merge commits happened since we branched off
-        // beta. That's our beta number!
+        // Figure out how many merge commits happened since we branched off master.
+        // That's our beta number!
+        // (Note that we use a `..` range, not the `...` symmetric difference.)
         let count = output(
             Command::new("git")
                 .arg("rev-list")
                 .arg("--count")
                 .arg("--merges")
-                .arg(format!("{}...HEAD", base))
+                .arg("refs/remotes/origin/master..HEAD")
                 .current_dir(&self.src),
         );
         let n = count.trim().parse().unwrap();

src/librustc_error_codes/error_codes/E0644.md

 A closure or generator was constructed that references its own type.
 
-Erroneous example:
+Erroneous code example:
 
 ```compile_fail,E0644
 fn fix<F>(f: &F)

src/librustc_middle/ty/sty.rs

@@ -724,10 +724,6 @@ pub fn iter<'a>(
 ///
 /// Trait references also appear in object types like `Foo<U>`, but in
 /// that case the `Self` parameter is absent from the substitutions.
-///
-/// Note that a `TraitRef` introduces a level of region binding, to
-/// account for higher-ranked trait bounds like `T: for<'a> Foo<&'a U>`
-/// or higher-ranked object types.
 #[derive(Copy, Clone, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
 #[derive(HashStable, TypeFoldable)]
 pub struct TraitRef<'tcx> {

src/librustc_mir/dataflow/move_paths/builder.rs

@@ -362,18 +362,17 @@ fn gather_rvalue(&mut self, rvalue: &Rvalue<'tcx>) {
     fn gather_terminator(&mut self, term: &Terminator<'tcx>) {
         match term.kind {
             TerminatorKind::Goto { target: _ }
-            | TerminatorKind::FalseEdges { .. }
-            | TerminatorKind::FalseUnwind { .. }
-            // In some sense returning moves the return place into the current
-            // call's destination, however, since there are no statements after
-            // this that could possibly access the return place, this doesn't
-            // need recording.
-            | TerminatorKind::Return
             | TerminatorKind::Resume
             | TerminatorKind::Abort
             | TerminatorKind::GeneratorDrop
+            | TerminatorKind::FalseEdges { .. }
+            | TerminatorKind::FalseUnwind { .. }
             | TerminatorKind::Unreachable => {}
 
+            TerminatorKind::Return => {
+                self.gather_move(Place::return_place());
+            }
+
             TerminatorKind::Assert { ref cond, .. } => {
                 self.gather_operand(cond);
             }
@@ -417,7 +416,7 @@ fn gather_terminator(&mut self, term: &Terminator<'tcx>) {
                 ref operands,
                 options: _,
                 line_spans: _,
-                destination: _
+                destination: _,
             } => {
                 for op in operands {
                     match *op {

src/librustc_mir/interpret/terminator.rs

@@ -50,7 +50,13 @@ pub(super) fn eval_terminator(
                 self.go_to_block(target_block);
             }
 
-            Call { ref func, ref args, destination, ref cleanup, .. } => {
+            Call {
+                ref func,
+                ref args,
+                destination,
+                ref cleanup,
+                from_hir_call: _from_hir_call,
+            } => {
                 let old_stack = self.frame_idx();
                 let old_loc = self.frame().loc;
                 let func = self.eval_operand(func, None)?;

src/librustc_mir/transform/validate.rs

@@ -3,10 +3,13 @@
 use super::{MirPass, MirSource};
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::{
-    mir::{Body, Location, Operand, Rvalue, Statement, StatementKind},
-    ty::{ParamEnv, TyCtxt},
+    mir::{
+        BasicBlock, Body, Location, Operand, Rvalue, Statement, StatementKind, Terminator,
+        TerminatorKind,
+    },
+    ty::{self, ParamEnv, TyCtxt},
 };
-use rustc_span::{def_id::DefId, Span, DUMMY_SP};
+use rustc_span::def_id::DefId;
 
 pub struct Validator {
     /// Describes at which point in the pipeline this validation is happening.
@@ -30,14 +33,27 @@ struct TypeChecker<'a, 'tcx> {
 }
 
 impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
-    fn fail(&self, span: Span, msg: impl AsRef<str>) {
+    fn fail(&self, location: Location, msg: impl AsRef<str>) {
+        let span = self.body.source_info(location).span;
         // We use `delay_span_bug` as we might see broken MIR when other errors have already
         // occurred.
         self.tcx.sess.diagnostic().delay_span_bug(
             span,
-            &format!("broken MIR in {:?} ({}): {}", self.def_id, self.when, msg.as_ref()),
+            &format!(
+                "broken MIR in {:?} ({}) at {:?}:\n{}",
+                self.def_id,
+                self.when,
+                location,
+                msg.as_ref()
+            ),
         );
     }
+
+    fn check_bb(&self, location: Location, bb: BasicBlock) {
+        if self.body.basic_blocks().get(bb).is_none() {
+            self.fail(location, format!("encountered jump to invalid basic block {:?}", bb))
+        }
+    }
 }
 
 impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
@@ -45,12 +61,10 @@ fn visit_operand(&mut self, operand: &Operand<'tcx>, location: Location) {
         // `Operand::Copy` is only supposed to be used with `Copy` types.
         if let Operand::Copy(place) = operand {
             let ty = place.ty(&self.body.local_decls, self.tcx).ty;
+            let span = self.body.source_info(location).span;
 
-            if !ty.is_copy_modulo_regions(self.tcx, self.param_env, DUMMY_SP) {
-                self.fail(
-                    DUMMY_SP,
-                    format!("`Operand::Copy` with non-`Copy` type {} at {:?}", ty, location),
-                );
+            if !ty.is_copy_modulo_regions(self.tcx, self.param_env, span) {
+                self.fail(location, format!("`Operand::Copy` with non-`Copy` type {}", ty));
             }
         }
 
@@ -65,11 +79,8 @@ fn visit_statement(&mut self, statement: &Statement<'tcx>, location: Location) {
                 Rvalue::Use(Operand::Copy(src) | Operand::Move(src)) => {
                     if dest == src {
                         self.fail(
-                            DUMMY_SP,
-                            format!(
-                                "encountered `Assign` statement with overlapping memory at {:?}",
-                                location
-                            ),
+                            location,
+                            "encountered `Assign` statement with overlapping memory",
                         );
                     }
                 }
@@ -77,4 +88,98 @@ fn visit_statement(&mut self, statement: &Statement<'tcx>, location: Location) {
             }
         }
     }
+
+    fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) {
+        match &terminator.kind {
+            TerminatorKind::Goto { target } => {
+                self.check_bb(location, *target);
+            }
+            TerminatorKind::SwitchInt { targets, values, .. } => {
+                if targets.len() != values.len() + 1 {
+                    self.fail(
+                        location,
+                        format!(
+                            "encountered `SwitchInt` terminator with {} values, but {} targets (should be values+1)",
+                            values.len(),
+                            targets.len(),
+                        ),
+                    );
+                }
+                for target in targets {
+                    self.check_bb(location, *target);
+                }
+            }
+            TerminatorKind::Drop { target, unwind, .. } => {
+                self.check_bb(location, *target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::DropAndReplace { target, unwind, .. } => {
+                self.check_bb(location, *target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::Call { func, destination, cleanup, .. } => {
+                let func_ty = func.ty(&self.body.local_decls, self.tcx);
+                match func_ty.kind {
+                    ty::FnPtr(..) | ty::FnDef(..) => {}
+                    _ => self.fail(
+                        location,
+                        format!("encountered non-callable type {} in `Call` terminator", func_ty),
+                    ),
+                }
+                if let Some((_, target)) = destination {
+                    self.check_bb(location, *target);
+                }
+                if let Some(cleanup) = cleanup {
+                    self.check_bb(location, *cleanup);
+                }
+            }
+            TerminatorKind::Assert { cond, target, cleanup, .. } => {
+                let cond_ty = cond.ty(&self.body.local_decls, self.tcx);
+                if cond_ty != self.tcx.types.bool {
+                    self.fail(
+                        location,
+                        format!(
+                            "encountered non-boolean condition of type {} in `Assert` terminator",
+                            cond_ty
+                        ),
+                    );
+                }
+                self.check_bb(location, *target);
+                if let Some(cleanup) = cleanup {
+                    self.check_bb(location, *cleanup);
+                }
+            }
+            TerminatorKind::Yield { resume, drop, .. } => {
+                self.check_bb(location, *resume);
+                if let Some(drop) = drop {
+                    self.check_bb(location, *drop);
+                }
+            }
+            TerminatorKind::FalseEdges { real_target, imaginary_target } => {
+                self.check_bb(location, *real_target);
+                self.check_bb(location, *imaginary_target);
+            }
+            TerminatorKind::FalseUnwind { real_target, unwind } => {
+                self.check_bb(location, *real_target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::InlineAsm { destination, .. } => {
+                if let Some(destination) = destination {
+                    self.check_bb(location, *destination);
+                }
+            }
+            // Nothing to validate for these.
+            TerminatorKind::Resume
+            | TerminatorKind::Abort
+            | TerminatorKind::Return
+            | TerminatorKind::Unreachable
+            | TerminatorKind::GeneratorDrop => {}
+        }
+    }
 }

src/librustc_mir/util/elaborate_drops.rs

@@ -233,6 +233,8 @@ pub fn elaborate_drop(&mut self, bb: BasicBlock) {
                     .patch_terminator(bb, TerminatorKind::Goto { target: self.succ });
             }
             DropStyle::Static => {
+                let loc = self.terminator_loc(bb);
+                self.elaborator.clear_drop_flag(loc, self.path, DropFlagMode::Deep);
                 self.elaborator.patch().patch_terminator(
                     bb,
                     TerminatorKind::Drop {
@@ -243,7 +245,9 @@ pub fn elaborate_drop(&mut self, bb: BasicBlock) {
                 );
             }
             DropStyle::Conditional => {
-                let drop_bb = self.complete_drop(self.succ, self.unwind);
+                let unwind = self.unwind; // FIXME(#43234)
+                let succ = self.succ;
+                let drop_bb = self.complete_drop(Some(DropFlagMode::Deep), succ, unwind);
                 self.elaborator
                     .patch()
                     .patch_terminator(bb, TerminatorKind::Goto { target: drop_bb });
@@ -315,7 +319,7 @@ fn drop_subpath(
                 // our own drop flag.
                 path: self.path,
             }
-            .complete_drop(succ, unwind)
+            .complete_drop(None, succ, unwind)
         }
     }
 
@@ -344,7 +348,13 @@ fn drop_ladder_bottom(&mut self) -> (BasicBlock, Unwind) {
         // Clear the "master" drop flag at the end. This is needed
         // because the "master" drop protects the ADT's discriminant,
         // which is invalidated after the ADT is dropped.
-        (self.drop_flag_reset_block(DropFlagMode::Shallow, self.succ, self.unwind), self.unwind)
+        let (succ, unwind) = (self.succ, self.unwind); // FIXME(#43234)
+        (
+            self.drop_flag_reset_block(DropFlagMode::Shallow, succ, unwind),
+            unwind.map(|unwind| {
+                self.drop_flag_reset_block(DropFlagMode::Shallow, unwind, Unwind::InCleanup)
+            }),
+        )
     }
 
     /// Creates a full drop ladder, consisting of 2 connected half-drop-ladders
@@ -878,7 +888,11 @@ fn open_drop(&mut self) -> BasicBlock {
                     self.open_drop_for_adt(def, substs)
                 }
             }
-            ty::Dynamic(..) => self.complete_drop(self.succ, self.unwind),
+            ty::Dynamic(..) => {
+                let unwind = self.unwind; // FIXME(#43234)
+                let succ = self.succ;
+                self.complete_drop(Some(DropFlagMode::Deep), succ, unwind)
+            }
             ty::Array(ety, size) => {
                 let size = size.try_eval_usize(self.tcx(), self.elaborator.param_env());
                 self.open_drop_for_array(ety, size)
@@ -889,10 +903,20 @@ fn open_drop(&mut self) -> BasicBlock {
         }
     }
 
-    fn complete_drop(&mut self, succ: BasicBlock, unwind: Unwind) -> BasicBlock {
-        debug!("complete_drop(succ={:?}, unwind={:?})", succ, unwind);
+    fn complete_drop(
+        &mut self,
+        drop_mode: Option<DropFlagMode>,
+        succ: BasicBlock,
+        unwind: Unwind,
+    ) -> BasicBlock {
+        debug!("complete_drop({:?},{:?})", self, drop_mode);
 
         let drop_block = self.drop_block(succ, unwind);
+        let drop_block = if let Some(mode) = drop_mode {
+            self.drop_flag_reset_block(mode, drop_block, unwind)
+        } else {
+            drop_block
+        };
 
         self.drop_flag_test_block(drop_block, succ, unwind)
     }
@@ -907,11 +931,6 @@ fn drop_flag_reset_block(
     ) -> BasicBlock {
         debug!("drop_flag_reset_block({:?},{:?})", self, mode);
 
-        if unwind.is_cleanup() {
-            // The drop flag isn't read again on the unwind path, so don't
-            // bother setting it.
-            return succ;
-        }
         let block = self.new_block(unwind, TerminatorKind::Goto { target: succ });
         let block_start = Location { block, statement_index: 0 };
         self.elaborator.clear_drop_flag(block_start, self.path, mode);
@@ -1028,6 +1047,11 @@ fn new_temp(&mut self, ty: Ty<'tcx>) -> Local {
         self.elaborator.patch().new_temp(ty, self.source_info.span)
     }
 
+    fn terminator_loc(&mut self, bb: BasicBlock) -> Location {
+        let body = self.elaborator.body();
+        self.elaborator.patch().terminator_loc(body, bb)
+    }
+
     fn constant_usize(&self, val: u16) -> Operand<'tcx> {
         Operand::Constant(box Constant {
             span: self.source_info.span,

src/librustc_mir/util/graphviz.rs

@@ -98,17 +98,12 @@ pub fn write_node_label<W: Write, INIT, FINI>(
     write!(w, r#"<table border="0" cellborder="1" cellspacing="0">"#)?;
 
     // Basic block number at the top.
-    let (blk, color) = if data.is_cleanup {
-        (format!("{} (cleanup)", block.index()), "lightblue")
-    } else {
-        (format!("{}", block.index()), "gray")
-    };
     write!(
         w,
-        r#"<tr><td bgcolor="{color}" align="center" colspan="{colspan}">{blk}</td></tr>"#,
+        r#"<tr><td {attrs} colspan="{colspan}">{blk}</td></tr>"#,
+        attrs = r#"bgcolor="gray" align="center""#,
         colspan = num_cols,
-        blk = blk,
-        color = color
+        blk = block.index()
     )?;
 
     init(w)?;

src/librustc_mir_build/build/block.rs

@@ -28,16 +28,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         self.in_opt_scope(opt_destruction_scope.map(|de| (de, source_info)), move |this| {
             this.in_scope((region_scope, source_info), LintLevel::Inherited, move |this| {
                 if targeted_by_break {
-                    this.in_breakable_scope(None, destination, span, |this| {
-                        Some(this.ast_block_stmts(
-                            destination,
-                            block,
-                            span,
-                            stmts,
-                            expr,
-                            safety_mode,
-                        ))
-                    })
+                    // This is a `break`-able block
+                    let exit_block = this.cfg.start_new_block();
+                    let block_exit =
+                        this.in_breakable_scope(None, exit_block, destination, |this| {
+                            this.ast_block_stmts(destination, block, span, stmts, expr, safety_mode)
+                        });
+                    this.cfg.goto(unpack!(block_exit), source_info, exit_block);
+                    exit_block.unit()
                 } else {
                     this.ast_block_stmts(destination, block, span, stmts, expr, safety_mode)
                 }

src/librustc_mir_build/build/expr/into.rs

@@ -135,19 +135,23 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 // body, even when the exact code in the body cannot unwind
 
                 let loop_block = this.cfg.start_new_block();
+                let exit_block = this.cfg.start_new_block();
 
                 // Start the loop.
                 this.cfg.goto(block, source_info, loop_block);
 
-                this.in_breakable_scope(Some(loop_block), destination, expr_span, move |this| {
+                this.in_breakable_scope(Some(loop_block), exit_block, destination, move |this| {
                     // conduct the test, if necessary
                     let body_block = this.cfg.start_new_block();
+                    let diverge_cleanup = this.diverge_cleanup();
                     this.cfg.terminate(
                         loop_block,
                         source_info,
-                        TerminatorKind::FalseUnwind { real_target: body_block, unwind: None },
+                        TerminatorKind::FalseUnwind {
+                            real_target: body_block,
+                            unwind: Some(diverge_cleanup),
+                        },
                     );
-                    this.diverge_from(loop_block);
 
                     // The “return” value of the loop body must always be an unit. We therefore
                     // introduce a unit temporary as the destination for the loop body.
@@ -155,10 +159,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     // Execute the body, branching back to the test.
                     let body_block_end = unpack!(this.into(tmp, body_block, body));
                     this.cfg.goto(body_block_end, source_info, loop_block);
-
-                    // Loops are only exited by `break` expressions.
-                    None
-                })
+                });
+                exit_block.unit()
             }
             ExprKind::Call { ty, fun, args, from_hir_call } => {
                 let intrinsic = match ty.kind {
@@ -200,6 +202,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         .collect();
 
                     let success = this.cfg.start_new_block();
+                    let cleanup = this.diverge_cleanup();
 
                     this.record_operands_moved(&args);
 
@@ -209,7 +212,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         TerminatorKind::Call {
                             func: fun,
                             args,
-                            cleanup: None,
+                            cleanup: Some(cleanup),
                             // FIXME(varkor): replace this with an uninhabitedness-based check.
                             // This requires getting access to the current module to call
                             // `tcx.is_ty_uninhabited_from`, which is currently tricky to do.
@@ -221,7 +224,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                             from_hir_call,
                         },
                     );
-                    this.diverge_from(block);
                     success.unit()
                 }
             }
@@ -425,12 +427,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 let scope = this.local_scope();
                 let value = unpack!(block = this.as_operand(block, scope, value));
                 let resume = this.cfg.start_new_block();
+                let cleanup = this.generator_drop_cleanup();
                 this.cfg.terminate(
                     block,
                     source_info,
-                    TerminatorKind::Yield { value, resume, resume_arg: destination, drop: None },
+                    TerminatorKind::Yield { value, resume, resume_arg: destination, drop: cleanup },
                 );
-                this.generator_drop_cleanup(block);
                 resume.unit()
             }
 

src/librustc_mir_build/build/matches/mod.rs

@@ -225,6 +225,8 @@ fn lower_match_arms(
         outer_source_info: SourceInfo,
         fake_borrow_temps: Vec<(Place<'tcx>, Local)>,
     ) -> BlockAnd<()> {
+        let match_scope = self.scopes.topmost();
+
         let arm_end_blocks: Vec<_> = arm_candidates
             .into_iter()
             .map(|(arm, candidate)| {
@@ -245,7 +247,7 @@ fn lower_match_arms(
                     let arm_block = this.bind_pattern(
                         outer_source_info,
                         candidate,
-                        arm.guard.as_ref(),
+                        arm.guard.as_ref().map(|g| (g, match_scope)),
                         &fake_borrow_temps,
                         scrutinee_span,
                         Some(arm.scope),
@@ -282,7 +284,7 @@ fn bind_pattern(
         &mut self,
         outer_source_info: SourceInfo,
         candidate: Candidate<'_, 'tcx>,
-        guard: Option<&Guard<'tcx>>,
+        guard: Option<(&Guard<'tcx>, region::Scope)>,
         fake_borrow_temps: &Vec<(Place<'tcx>, Local)>,
         scrutinee_span: Span,
         arm_scope: Option<region::Scope>,
@@ -1588,7 +1590,7 @@ fn bind_and_guard_matched_candidate<'pat>(
         &mut self,
         candidate: Candidate<'pat, 'tcx>,
         parent_bindings: &[(Vec<Binding<'tcx>>, Vec<Ascription<'tcx>>)],
-        guard: Option<&Guard<'tcx>>,
+        guard: Option<(&Guard<'tcx>, region::Scope)>,
         fake_borrows: &Vec<(Place<'tcx>, Local)>,
         scrutinee_span: Span,
         schedule_drops: bool,
@@ -1700,7 +1702,7 @@ fn bind_and_guard_matched_candidate<'pat>(
         //      the reference that we create for the arm.
         //    * So we eagerly create the reference for the arm and then take a
         //      reference to that.
-        if let Some(guard) = guard {
+        if let Some((guard, region_scope)) = guard {
             let tcx = self.hir.tcx();
             let bindings = parent_bindings
                 .iter()
@@ -1744,7 +1746,12 @@ fn bind_and_guard_matched_candidate<'pat>(
                 unreachable
             });
             let outside_scope = self.cfg.start_new_block();
-            self.exit_top_scope(otherwise_post_guard_block, outside_scope, source_info);
+            self.exit_scope(
+                source_info.span,
+                region_scope,
+                otherwise_post_guard_block,
+                outside_scope,
+            );
             self.false_edges(
                 outside_scope,
                 otherwise_block,

src/librustc_mir_build/build/matches/test.rs

@@ -423,6 +423,7 @@ fn non_scalar_compare(
         let bool_ty = self.hir.bool_ty();
         let eq_result = self.temp(bool_ty, source_info.span);
         let eq_block = self.cfg.start_new_block();
+        let cleanup = self.diverge_cleanup();
         self.cfg.terminate(
             block,
             source_info,
@@ -440,11 +441,10 @@ fn non_scalar_compare(
                 }),
                 args: vec![val, expect],
                 destination: Some((eq_result, eq_block)),
-                cleanup: None,
+                cleanup: Some(cleanup),
                 from_hir_call: false,
             },
         );
-        self.diverge_from(block);
 
         if let [success_block, fail_block] = *make_target_blocks(self) {
             // check the result

src/librustc_mir_build/build/mod.rs

@@ -327,6 +327,11 @@ struct Builder<'a, 'tcx> {
 
     var_debug_info: Vec<VarDebugInfo<'tcx>>,
 
+    /// Cached block with the `RESUME` terminator; this is created
+    /// when first set of cleanups are built.
+    cached_resume_block: Option<BasicBlock>,
+    /// Cached block with the `RETURN` terminator.
+    cached_return_block: Option<BasicBlock>,
     /// Cached block with the `UNREACHABLE` terminator.
     cached_unreachable_block: Option<BasicBlock>,
 }
@@ -585,34 +590,50 @@ fn construct_fn<'a, 'tcx, A>(
         region::Scope { id: body.value.hir_id.local_id, data: region::ScopeData::CallSite };
     let arg_scope =
         region::Scope { id: body.value.hir_id.local_id, data: region::ScopeData::Arguments };
+    let mut block = START_BLOCK;
     let source_info = builder.source_info(span);
     let call_site_s = (call_site_scope, source_info);
-    unpack!(builder.in_scope(call_site_s, LintLevel::Inherited, |builder| {
-        let arg_scope_s = (arg_scope, source_info);
-        // Attribute epilogue to function's closing brace
-        let fn_end = span.shrink_to_hi();
-        let return_block =
-            unpack!(builder.in_breakable_scope(None, Place::return_place(), fn_end, |builder| {
-                Some(builder.in_scope(arg_scope_s, LintLevel::Inherited, |builder| {
-                    builder.args_and_body(
-                        START_BLOCK,
-                        fn_def_id.to_def_id(),
-                        &arguments,
-                        arg_scope,
-                        &body.value,
-                    )
-                }))
-            }));
-        let source_info = builder.source_info(fn_end);
-        builder.cfg.terminate(return_block, source_info, TerminatorKind::Return);
-        let should_abort = should_abort_on_panic(tcx, fn_def_id, abi);
-        builder.build_drop_trees(should_abort);
-        // Attribute any unreachable codepaths to the function's closing brace
-        if let Some(unreachable_block) = builder.cached_unreachable_block {
-            builder.cfg.terminate(unreachable_block, source_info, TerminatorKind::Unreachable);
-        }
-        return_block.unit()
-    }));
+    unpack!(
+        block = builder.in_scope(call_site_s, LintLevel::Inherited, |builder| {
+            if should_abort_on_panic(tcx, fn_def_id, abi) {
+                builder.schedule_abort();
+            }
+
+            let arg_scope_s = (arg_scope, source_info);
+            // `return_block` is called when we evaluate a `return` expression, so
+            // we just use `START_BLOCK` here.
+            unpack!(
+                block = builder.in_breakable_scope(
+                    None,
+                    START_BLOCK,
+                    Place::return_place(),
+                    |builder| {
+                        builder.in_scope(arg_scope_s, LintLevel::Inherited, |builder| {
+                            builder.args_and_body(
+                                block,
+                                fn_def_id.to_def_id(),
+                                &arguments,
+                                arg_scope,
+                                &body.value,
+                            )
+                        })
+                    },
+                )
+            );
+            // Attribute epilogue to function's closing brace
+            let fn_end = span.shrink_to_hi();
+            let source_info = builder.source_info(fn_end);
+            let return_block = builder.return_block();
+            builder.cfg.goto(block, source_info, return_block);
+            builder.cfg.terminate(return_block, source_info, TerminatorKind::Return);
+            // Attribute any unreachable codepaths to the function's closing brace
+            if let Some(unreachable_block) = builder.cached_unreachable_block {
+                builder.cfg.terminate(unreachable_block, source_info, TerminatorKind::Unreachable);
+            }
+            return_block.unit()
+        })
+    );
+    assert_eq!(block, builder.return_block());
 
     let spread_arg = if abi == Abi::RustCall {
         // RustCall pseudo-ABI untuples the last argument.
@@ -646,7 +667,8 @@ fn construct_const<'a, 'tcx>(
     let source_info = builder.source_info(span);
     builder.cfg.terminate(block, source_info, TerminatorKind::Return);
 
-    builder.build_drop_trees(false);
+    // Constants can't `return` so a return block should not be created.
+    assert_eq!(builder.cached_return_block, None);
 
     // Constants may be match expressions in which case an unreachable block may
     // be created, so terminate it properly.
@@ -713,7 +735,7 @@ fn new(
             fn_span: span,
             arg_count,
             generator_kind,
-            scopes: scope::Scopes::new(),
+            scopes: Default::default(),
             block_context: BlockContext::new(),
             source_scopes: IndexVec::new(),
             source_scope: OUTERMOST_SOURCE_SCOPE,
@@ -726,6 +748,8 @@ fn new(
             var_indices: Default::default(),
             unit_temp: None,
             var_debug_info: vec![],
+            cached_resume_block: None,
+            cached_return_block: None,
             cached_unreachable_block: None,
         };
 
@@ -957,6 +981,17 @@ fn get_unit_temp(&mut self) -> Place<'tcx> {
             }
         }
     }
+
+    fn return_block(&mut self) -> BasicBlock {
+        match self.cached_return_block {
+            Some(rb) => rb,
+            None => {
+                let rb = self.cfg.start_new_block();
+                self.cached_return_block = Some(rb);
+                rb
+            }
+        }
+    }
 }
 
 ///////////////////////////////////////////////////////////////////////////

src/test/codegen/drop.rs

@@ -23,13 +23,13 @@ pub fn droppy() {
 // FIXME(eddyb) the `void @` forces a match on the instruction, instead of the
 // comment, that's `; call core::intrinsics::drop_in_place::<drop::SomeUniqueName>`
 // for the `v0` mangling, should switch to matching on that once `legacy` is gone.
-// CHECK-NOT: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
-// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
-// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK-NOT: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK-NOT: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK-NOT: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
 // The next line checks for the } that ends the function definition

src/test/mir-opt/basic_assignment/rustc.main.SimplifyCfg-initial.after.mir

@@ -47,14 +47,30 @@ fn main() -> () {
         StorageLive(_5);                 // scope 3 at $DIR/basic_assignment.rs:19:9: 19:15
         StorageLive(_6);                 // scope 4 at $DIR/basic_assignment.rs:23:14: 23:20
         _6 = move _4;                    // scope 4 at $DIR/basic_assignment.rs:23:14: 23:20
-        replace(_5 <- move _6) -> [return: bb1, unwind: bb5]; // scope 4 at $DIR/basic_assignment.rs:23:5: 23:11
+        replace(_5 <- move _6) -> [return: bb2, unwind: bb5]; // scope 4 at $DIR/basic_assignment.rs:23:5: 23:11
     }
 
-    bb1: {
-        drop(_6) -> [return: bb2, unwind: bb6]; // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/basic_assignment.rs:10:1: 24:2
     }
 
     bb2: {
+        drop(_6) -> [return: bb6, unwind: bb4]; // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    }
+
+    bb3 (cleanup): {
+        drop(_4) -> bb1;                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
+    }
+
+    bb4 (cleanup): {
+        drop(_5) -> bb3;                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
+    }
+
+    bb5 (cleanup): {
+        drop(_6) -> bb4;                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    }
+
+    bb6: {
         StorageDead(_6);                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
         _0 = const ();                   // scope 0 at $DIR/basic_assignment.rs:10:11: 24:2
                                          // ty::Const
@@ -63,34 +79,18 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/basic_assignment.rs:10:11: 24:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_5) -> [return: bb3, unwind: bb7]; // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
+        drop(_5) -> [return: bb7, unwind: bb3]; // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
     }
 
-    bb3: {
+    bb7: {
         StorageDead(_5);                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
-        drop(_4) -> [return: bb4, unwind: bb8]; // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
+        drop(_4) -> [return: bb8, unwind: bb1]; // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
     }
 
-    bb4: {
+    bb8: {
         StorageDead(_4);                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
         StorageDead(_2);                 // scope 1 at $DIR/basic_assignment.rs:24:1: 24:2
         StorageDead(_1);                 // scope 0 at $DIR/basic_assignment.rs:24:1: 24:2
         return;                          // scope 0 at $DIR/basic_assignment.rs:24:2: 24:2
     }
-
-    bb5 (cleanup): {
-        drop(_6) -> bb6;                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
-    }
-
-    bb6 (cleanup): {
-        drop(_5) -> bb7;                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
-    }
-
-    bb7 (cleanup): {
-        drop(_4) -> bb8;                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
-    }
-
-    bb8 (cleanup): {
-        resume;                          // scope 0 at $DIR/basic_assignment.rs:10:1: 24:2
-    }
 }

src/test/mir-opt/box_expr/rustc.main.ElaborateDrops.before.mir

@@ -14,7 +14,7 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/box_expr.rs:7:9: 7:10
         StorageLive(_2);                 // scope 0 at $DIR/box_expr.rs:7:13: 7:25
         _2 = Box(S);                     // scope 0 at $DIR/box_expr.rs:7:13: 7:25
-        (*_2) = const S::new() -> [return: bb1, unwind: bb7]; // scope 0 at $DIR/box_expr.rs:7:17: 7:25
+        (*_2) = const S::new() -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/box_expr.rs:7:17: 7:25
                                          // ty::Const
                                          // + ty: fn() -> S {S::new}
                                          // + val: Value(Scalar(<ZST>))
@@ -23,17 +23,25 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> S {S::new}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
-        _1 = move _2;                    // scope 0 at $DIR/box_expr.rs:7:13: 7:25
-        drop(_2) -> bb2;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/box_expr.rs:6:1: 9:2
     }
 
     bb2: {
+        _1 = move _2;                    // scope 0 at $DIR/box_expr.rs:7:13: 7:25
+        drop(_2) -> bb4;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    }
+
+    bb3 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    }
+
+    bb4: {
         StorageDead(_2);                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
         StorageLive(_3);                 // scope 1 at $DIR/box_expr.rs:8:5: 8:12
         StorageLive(_4);                 // scope 1 at $DIR/box_expr.rs:8:10: 8:11
         _4 = move _1;                    // scope 1 at $DIR/box_expr.rs:8:10: 8:11
-        _3 = const std::mem::drop::<std::boxed::Box<S>>(move _4) -> [return: bb3, unwind: bb5]; // scope 1 at $DIR/box_expr.rs:8:5: 8:12
+        _3 = const std::mem::drop::<std::boxed::Box<S>>(move _4) -> [return: bb5, unwind: bb7]; // scope 1 at $DIR/box_expr.rs:8:5: 8:12
                                          // ty::Const
                                          // + ty: fn(std::boxed::Box<S>) {std::mem::drop::<std::boxed::Box<S>>}
                                          // + val: Value(Scalar(<ZST>))
@@ -42,7 +50,7 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(std::boxed::Box<S>) {std::mem::drop::<std::boxed::Box<S>>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb3: {
+    bb5: {
         StorageDead(_4);                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
         StorageDead(_3);                 // scope 1 at $DIR/box_expr.rs:8:12: 8:13
         _0 = const ();                   // scope 0 at $DIR/box_expr.rs:6:11: 9:2
@@ -52,27 +60,19 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/box_expr.rs:6:11: 9:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_1) -> bb4;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
-    }
-
-    bb4: {
-        StorageDead(_1);                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
-        return;                          // scope 0 at $DIR/box_expr.rs:9:2: 9:2
-    }
-
-    bb5 (cleanup): {
-        drop(_4) -> bb6;                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
+        drop(_1) -> bb8;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
     }
 
     bb6 (cleanup): {
-        drop(_1) -> bb8;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
     }
 
     bb7 (cleanup): {
-        drop(_2) -> bb8;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+        drop(_4) -> bb6;                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
     }
 
-    bb8 (cleanup): {
-        resume;                          // scope 0 at $DIR/box_expr.rs:6:1: 9:2
+    bb8: {
+        StorageDead(_1);                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
+        return;                          // scope 0 at $DIR/box_expr.rs:9:2: 9:2
     }
 }

src/test/mir-opt/const-promotion-extern-static/rustc.BAR.PromoteTemps.diff

@@ -33,7 +33,7 @@
 +                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(DefId(0:6 ~ const_promotion_extern_static[317d]::BAR[0]), [], Some(promoted[0])) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:35
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:35
-          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
+          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
                                            // ty::Const
                                            // + ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}
                                            // + val: Value(Scalar(<ZST>))
@@ -42,15 +42,15 @@
                                            // + literal: Const { ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
+      }
+  
+      bb2: {
 -         StorageDead(_5);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:43: 9:44
 -         StorageDead(_3);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:43: 9:44
           return;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
-      }
 - }
 - 
 - alloc0 (static: Y, size: 4, align: 4) {

src/test/mir-opt/const-promotion-extern-static/rustc.FOO.PromoteTemps.diff

@@ -35,7 +35,7 @@
 +                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(DefId(0:7 ~ const_promotion_extern_static[317d]::FOO[0]), [], Some(promoted[0])) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:46
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:46
-          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
+          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
                                            // ty::Const
                                            // + ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}
                                            // + val: Value(Scalar(<ZST>))
@@ -44,15 +44,15 @@
                                            // + literal: Const { ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
+      }
+  
+      bb2: {
 -         StorageDead(_5);                 // scope 0 at $DIR/const-promotion-extern-static.rs:13:54: 13:55
 -         StorageDead(_3);                 // scope 0 at $DIR/const-promotion-extern-static.rs:13:54: 13:55
           return;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
-      }
   }
 - 
 - alloc2 (extern static: X)

src/test/mir-opt/const_prop/boxes/rustc.main.ConstProp.diff

@@ -35,10 +35,14 @@
                                            // + span: $DIR/boxes.rs:12:25: 12:26
                                            // + literal: Const { ty: i32, val: Value(Scalar(0x00000000)) }
           StorageDead(_2);                 // scope 0 at $DIR/boxes.rs:12:25: 12:26
-          drop(_3) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/boxes.rs:12:26: 12:27
+          drop(_3) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/boxes.rs:12:26: 12:27
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/boxes.rs:11:1: 13:2
+      }
+  
+      bb2: {
           StorageDead(_3);                 // scope 0 at $DIR/boxes.rs:12:26: 12:27
           _0 = const ();                   // scope 0 at $DIR/boxes.rs:11:11: 13:2
                                            // ty::Const
@@ -50,9 +54,5 @@
           StorageDead(_1);                 // scope 0 at $DIR/boxes.rs:13:1: 13:2
           return;                          // scope 0 at $DIR/boxes.rs:13:2: 13:2
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/boxes.rs:11:1: 13:2
-      }
   }
   

src/test/mir-opt/generator-drop-cleanup/rustc.main-{{closure}}.generator_drop.0.mir

@@ -21,31 +21,31 @@ fn main::{{closure}}#0(_1: *mut [generator@$DIR/generator-drop-cleanup.rs:10:15:
 
     bb0: {
         _9 = discriminant((*_1));        // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
-        switchInt(move _9) -> [0u32: bb7, 3u32: bb10, otherwise: bb11]; // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        switchInt(move _9) -> [0u32: bb7, 3u32: bb11, otherwise: bb12]; // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb1: {
-        StorageDead(_5);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:13: 12:14
-        StorageDead(_4);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:14: 12:15
-        drop((((*_1) as variant#3).0: std::string::String)) -> [return: bb2, unwind: bb5]; // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb2: {
+    bb2 (cleanup): {
         nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
         goto -> bb8;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb3: {
-        return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        StorageDead(_5);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:13: 12:14
+        StorageDead(_4);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:14: 12:15
+        drop((((*_1) as variant#3).0: std::string::String)) -> [return: bb4, unwind: bb2]; // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
-    bb4 (cleanup): {
-        resume;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+    bb4: {
+        nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+        goto -> bb9;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
-    bb5 (cleanup): {
-        nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
-        goto -> bb4;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb5: {
+        return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
     bb6: {
@@ -53,24 +53,28 @@ fn main::{{closure}}#0(_1: *mut [generator@$DIR/generator-drop-cleanup.rs:10:15:
     }
 
     bb7: {
-        goto -> bb9;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb10;                    // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb8: {
-        goto -> bb3;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb8 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb9: {
-        goto -> bb6;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb5;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb10: {
+        goto -> bb6;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+    }
+
+    bb11: {
         StorageLive(_4);                 // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
         StorageLive(_5);                 // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
-        goto -> bb1;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb3;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb11: {
+    bb12: {
         return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 }

src/test/mir-opt/generator-storage-dead-unwind/rustc.main-{{closure}}.StateTransform.before.mir

@@ -39,16 +39,20 @@ yields ()
         StorageLive(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
         StorageLive(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
         _6 = ();                         // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
-        _5 = yield(move _6) -> [resume: bb1, drop: bb5]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
+        _5 = yield(move _6) -> [resume: bb2, drop: bb4]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
+    }
+
+    bb2: {
         StorageDead(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:13: 25:14
         StorageDead(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:14: 25:15
         StorageLive(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
         StorageLive(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:14: 26:15
         _8 = move _3;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:14: 26:15
-        _7 = const take::<Foo>(move _8) -> [return: bb2, unwind: bb9]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
+        _7 = const take::<Foo>(move _8) -> [return: bb7, unwind: bb9]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
                                          // ty::Const
                                          // + ty: fn(Foo) {take::<Foo>}
                                          // + val: Value(Scalar(<ZST>))
@@ -57,80 +61,76 @@ yields ()
                                          // + literal: Const { ty: fn(Foo) {take::<Foo>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb2: {
-        StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
-        StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
-        StorageLive(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
-        StorageLive(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
-        _10 = move _4;                   // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
-        _9 = const take::<Bar>(move _10) -> [return: bb3, unwind: bb8]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
-                                         // ty::Const
-                                         // + ty: fn(Bar) {take::<Bar>}
-                                         // + val: Value(Scalar(<ZST>))
-                                         // mir::Constant
-                                         // + span: $DIR/generator-storage-dead-unwind.rs:27:9: 27:13
-                                         // + literal: Const { ty: fn(Bar) {take::<Bar>}, val: Value(Scalar(<ZST>)) }
-    }
-
-    bb3: {
-        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
-        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
-        _0 = const ();                   // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
-                                         // ty::Const
-                                         // + ty: ()
-                                         // + val: Value(Scalar(<ZST>))
-                                         // mir::Constant
-                                         // + span: $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
-                                         // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+    bb3 (cleanup): {
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> [return: bb4, unwind: bb11]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> bb1;                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb4: {
-        return;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:6: 28:6
-    }
-
-    bb5: {
         StorageDead(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:13: 25:14
         StorageDead(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:14: 25:15
         StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_3) -> [return: bb6, unwind: bb12]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_3) -> [return: bb5, unwind: bb3]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
-    bb6: {
+    bb5: {
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> [return: bb7, unwind: bb11]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> [return: bb6, unwind: bb1]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
-    bb7: {
+    bb6: {
         generator_drop;                  // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
     }
 
+    bb7: {
+        StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
+        StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
+        StorageLive(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
+        StorageLive(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
+        _10 = move _4;                   // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
+        _9 = const take::<Bar>(move _10) -> [return: bb10, unwind: bb11]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
+                                         // ty::Const
+                                         // + ty: fn(Bar) {take::<Bar>}
+                                         // + val: Value(Scalar(<ZST>))
+                                         // mir::Constant
+                                         // + span: $DIR/generator-storage-dead-unwind.rs:27:9: 27:13
+                                         // + literal: Const { ty: fn(Bar) {take::<Bar>}, val: Value(Scalar(<ZST>)) }
+    }
+
     bb8 (cleanup): {
-        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
-        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
-        goto -> bb10;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
+        StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> bb1;                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb9 (cleanup): {
         StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
         StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
-        goto -> bb10;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
+        goto -> bb8;                     // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
     }
 
-    bb10 (cleanup): {
+    bb10: {
+        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
+        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
+        _0 = const ();                   // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
+                                         // ty::Const
+                                         // + ty: ()
+                                         // + val: Value(Scalar(<ZST>))
+                                         // mir::Constant
+                                         // + span: $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
+                                         // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> bb11;                // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> [return: bb12, unwind: bb1]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
+        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
+        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
+        goto -> bb8;                     // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
     }
 
-    bb12 (cleanup): {
-        StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> bb11;                // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+    bb12: {
+        return;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:6: 28:6
     }
 }

src/test/mir-opt/graphviz/rustc.main.mir_map.0.dot

@@ -3,5 +3,8 @@ digraph Mir_0_3 {
     node [fontname="monospace"];
     edge [fontname="monospace"];
     label=<fn main() -&gt; ()<br align="left"/>>;
-    bb0__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">0</td></tr><tr><td align="left" balign="left">_0 = const ()<br/></td></tr><tr><td align="left">return</td></tr></table>>];
+    bb0__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">0</td></tr><tr><td align="left" balign="left">_0 = const ()<br/></td></tr><tr><td align="left">goto</td></tr></table>>];
+    bb1__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">1</td></tr><tr><td align="left">resume</td></tr></table>>];
+    bb2__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">2</td></tr><tr><td align="left">return</td></tr></table>>];
+    bb0__0_3 -> bb2__0_3 [label=""];
 }

src/test/mir-opt/inline/inline-into-box-place/32bit/rustc.main.Inline.diff

@@ -17,7 +17,7 @@
           StorageLive(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:8:9: 8:11
           StorageLive(_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
           _2 = Box(std::vec::Vec<u32>);    // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
--         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
+-         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         _4 = &mut (*_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         ((*_4).0: alloc::raw_vec::RawVec<u32>) = const alloc::raw_vec::RawVec::<u32> { ptr: std::ptr::Unique::<u32> { pointer: {0x4 as *const u32}, _marker: std::marker::PhantomData::<u32> }, cap: 0usize, alloc: std::alloc::Global }; // scope 2 at $SRC_DIR/liballoc/vec.rs:LL:COL
                                            // ty::Const
@@ -31,7 +31,11 @@
 -                                          // + literal: Const { ty: fn() -> std::vec::Vec<u32> {std::vec::Vec::<u32>::new}, val: Value(Scalar(<ZST>)) }
 -     }
 - 
--     bb1: {
+-     bb1 (cleanup): {
+-         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
+-     }
+- 
+-     bb2: {
 +                                          // + span: $SRC_DIR/liballoc/vec.rs:LL:COL
 +                                          // + user_ty: UserType(0)
 +                                          // + literal: Const { ty: alloc::raw_vec::RawVec<u32>, val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, size: Size { raw: 8 }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
@@ -51,29 +55,28 @@
                                            // mir::Constant
                                            // + span: $DIR/inline-into-box-place.rs:7:11: 9:2
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         drop(_1) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-+         drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         drop(_1) -> [return: bb3, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
       }
   
--     bb2: {
-+     bb1: {
-          StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-          return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
+-     bb3: {
+-         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
++     bb1 (cleanup): {
++         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
       }
   
--     bb3 (cleanup): {
-+     bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
--     }
-- 
 -     bb4 (cleanup): {
--         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb3; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
+-         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb1; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // ty::Const
 -                                          // + ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}
 -                                          // + val: Value(Scalar(<ZST>))
 -                                          // mir::Constant
 -                                          // + span: $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // + literal: Const { ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}, val: Value(Scalar(<ZST>)) }
++     bb2: {
++         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
       }
   }
   

src/test/mir-opt/inline/inline-into-box-place/64bit/rustc.main.Inline.diff

@@ -17,7 +17,7 @@
           StorageLive(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:8:9: 8:11
           StorageLive(_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
           _2 = Box(std::vec::Vec<u32>);    // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
--         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
+-         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         _4 = &mut (*_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         ((*_4).0: alloc::raw_vec::RawVec<u32>) = const alloc::raw_vec::RawVec::<u32> { ptr: std::ptr::Unique::<u32> { pointer: {0x4 as *const u32}, _marker: std::marker::PhantomData::<u32> }, cap: 0usize, alloc: std::alloc::Global }; // scope 2 at $SRC_DIR/liballoc/vec.rs:LL:COL
                                            // ty::Const
@@ -31,7 +31,11 @@
 -                                          // + literal: Const { ty: fn() -> std::vec::Vec<u32> {std::vec::Vec::<u32>::new}, val: Value(Scalar(<ZST>)) }
 -     }
 - 
--     bb1: {
+-     bb1 (cleanup): {
+-         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
+-     }
+- 
+-     bb2: {
 +                                          // + span: $SRC_DIR/liballoc/vec.rs:LL:COL
 +                                          // + user_ty: UserType(0)
 +                                          // + literal: Const { ty: alloc::raw_vec::RawVec<u32>, val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [65535], len: Size { raw: 16 } }, size: Size { raw: 16 }, align: Align { pow2: 3 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
@@ -51,29 +55,28 @@
                                            // mir::Constant
                                            // + span: $DIR/inline-into-box-place.rs:7:11: 9:2
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         drop(_1) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-+         drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         drop(_1) -> [return: bb3, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
       }
   
--     bb2: {
-+     bb1: {
-          StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-          return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
+-     bb3: {
+-         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
++     bb1 (cleanup): {
++         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
       }
   
--     bb3 (cleanup): {
-+     bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
--     }
-- 
 -     bb4 (cleanup): {
--         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb3; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
+-         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb1; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // ty::Const
 -                                          // + ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}
 -                                          // + val: Value(Scalar(<ZST>))
 -                                          // mir::Constant
 -                                          // + span: $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // + literal: Const { ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}, val: Value(Scalar(<ZST>)) }
++     bb2: {
++         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
       }
   }
   

src/test/mir-opt/issue-38669/rustc.main.SimplifyCfg-initial.after.mir

@@ -21,26 +21,30 @@ fn main() -> () {
                                          // + span: $DIR/issue-38669.rs:5:28: 5:33
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
         FakeRead(ForLet, _1);            // scope 0 at $DIR/issue-38669.rs:5:9: 5:25
-        goto -> bb1;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+        goto -> bb2;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
     }
 
-    bb1: {
-        falseUnwind -> [real: bb2, cleanup: bb6]; // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-38669.rs:4:1: 12:2
     }
 
     bb2: {
+        falseUnwind -> [real: bb3, cleanup: bb1]; // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+    }
+
+    bb3: {
         StorageLive(_3);                 // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
         StorageLive(_4);                 // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
         _4 = _1;                         // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
         FakeRead(ForMatchedPlace, _4);   // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
-        switchInt(_4) -> [false: bb4, otherwise: bb3]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
+        switchInt(_4) -> [false: bb5, otherwise: bb4]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
     }
 
-    bb3: {
-        falseEdges -> [real: bb5, imaginary: bb4]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
+    bb4: {
+        falseEdges -> [real: bb6, imaginary: bb5]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
     }
 
-    bb4: {
+    bb5: {
         _3 = const ();                   // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
                                          // ty::Const
                                          // + ty: ()
@@ -64,10 +68,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-38669.rs:6:10: 11:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb1;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+        goto -> bb2;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
     }
 
-    bb5: {
+    bb6: {
         _0 = const ();                   // scope 1 at $DIR/issue-38669.rs:8:13: 8:18
                                          // ty::Const
                                          // + ty: ()
@@ -80,8 +84,4 @@ fn main() -> () {
         StorageDead(_1);                 // scope 0 at $DIR/issue-38669.rs:12:1: 12:2
         return;                          // scope 0 at $DIR/issue-38669.rs:12:2: 12:2
     }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-38669.rs:4:1: 12:2
-    }
 }

src/test/mir-opt/issue-41110/rustc.main.ElaborateDrops.after.mir

@@ -32,7 +32,7 @@ fn main() -> () {
         StorageLive(_3);                 // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
         StorageLive(_4);                 // scope 0 at $DIR/issue-41110.rs:8:21: 8:22
         _4 = S;                          // scope 0 at $DIR/issue-41110.rs:8:21: 8:22
-        _3 = const S::id(move _4) -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
+        _3 = const S::id(move _4) -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
                                          // ty::Const
                                          // + ty: fn(S) -> S {S::id}
                                          // + val: Value(Scalar(<ZST>))
@@ -41,7 +41,11 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(S) -> S {S::id}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41110.rs:7:1: 9:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
         _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
                                          // ty::Const
@@ -50,7 +54,7 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41110.rs:8:13: 8:28
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
-        _1 = const S::other(move _2, move _3) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
+        _1 = const S::other(move _2, move _3) -> [return: bb6, unwind: bb5]; // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
                                          // ty::Const
                                          // + ty: fn(S, S) {S::other}
                                          // + val: Value(Scalar(<ZST>))
@@ -59,7 +63,19 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(S, S) {S::other}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb2: {
+    bb3 (cleanup): {
+        goto -> bb9;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb4 (cleanup): {
+        goto -> bb3;                     // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
+    }
+
+    bb5 (cleanup): {
+        goto -> bb3;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb6: {
         StorageDead(_3);                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
         _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
                                          // ty::Const
@@ -80,27 +96,22 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/issue-41110.rs:9:2: 9:2
     }
 
-    bb3 (cleanup): {
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
-    }
-
-    bb4 (cleanup): {
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
-    }
-
-    bb5 (cleanup): {
-        goto -> bb8;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
-    }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41110.rs:7:1: 9:2
-    }
-
     bb7 (cleanup): {
-        drop(_2) -> bb6;                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+        drop(_2) -> bb1;                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
     }
 
     bb8 (cleanup): {
-        switchInt(_5) -> [false: bb6, otherwise: bb7]; // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+        _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41110.rs:8:27: 8:28
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb7;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb9 (cleanup): {
+        switchInt(_5) -> [false: bb1, otherwise: bb8]; // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
     }
 }

src/test/mir-opt/issue-41110/rustc.test.ElaborateDrops.after.mir

@@ -37,7 +37,7 @@ fn test() -> () {
         StorageLive(_3);                 // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
         StorageLive(_4);                 // scope 2 at $DIR/issue-41110.rs:17:10: 17:11
         _4 = move _2;                    // scope 2 at $DIR/issue-41110.rs:17:10: 17:11
-        _3 = const std::mem::drop::<S>(move _4) -> [return: bb1, unwind: bb7]; // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
+        _3 = const std::mem::drop::<S>(move _4) -> [return: bb2, unwind: bb5]; // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
                                          // ty::Const
                                          // + ty: fn(S) {std::mem::drop::<S>}
                                          // + val: Value(Scalar(<ZST>))
@@ -46,7 +46,11 @@ fn test() -> () {
                                          // + literal: Const { ty: fn(S) {std::mem::drop::<S>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41110.rs:14:1: 19:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
         StorageDead(_3);                 // scope 2 at $DIR/issue-41110.rs:17:12: 17:13
         StorageLive(_5);                 // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
@@ -61,11 +65,27 @@ fn test() -> () {
         goto -> bb12;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
-    bb2: {
-        goto -> bb3;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
+    bb3 (cleanup): {
+        goto -> bb15;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb4 (cleanup): {
+        goto -> bb3;                     // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb5 (cleanup): {
+        goto -> bb4;                     // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
+    }
+
+    bb6: {
+        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
+    }
+
+    bb7 (cleanup): {
+        goto -> bb4;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
     }
 
-    bb3: {
+    bb8: {
         StorageDead(_5);                 // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
         _0 = const ();                   // scope 0 at $DIR/issue-41110.rs:14:15: 19:2
                                          // ty::Const
@@ -74,15 +94,15 @@ fn test() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41110.rs:14:15: 19:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_2) -> [return: bb4, unwind: bb9]; // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
+        drop(_2) -> [return: bb9, unwind: bb3]; // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
-    bb4: {
+    bb9: {
         StorageDead(_2);                 // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        goto -> bb10;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
-    bb5: {
+    bb10: {
         _6 = const false;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
                                          // ty::Const
                                          // + ty: bool
@@ -94,41 +114,32 @@ fn test() -> () {
         return;                          // scope 0 at $DIR/issue-41110.rs:19:2: 19:2
     }
 
-    bb6 (cleanup): {
-        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
-    }
-
-    bb7 (cleanup): {
-        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
-    }
-
-    bb8 (cleanup): {
-        goto -> bb9;                     // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
-    }
-
-    bb9 (cleanup): {
-        goto -> bb14;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
-    }
-
-    bb10 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41110.rs:14:1: 19:2
-    }
-
     bb11 (cleanup): {
         _2 = move _5;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
-        goto -> bb6;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
+        goto -> bb7;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
     bb12: {
         _2 = move _5;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
-        goto -> bb2;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
+        goto -> bb6;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
     bb13 (cleanup): {
-        drop(_1) -> bb10;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
     bb14 (cleanup): {
-        switchInt(_6) -> [false: bb10, otherwise: bb13]; // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        _6 = const false;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41110.rs:19:1: 19:2
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb13;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb15 (cleanup): {
+        switchInt(_6) -> [false: bb1, otherwise: bb14]; // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 }

src/test/mir-opt/issue-41697/32bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir

@@ -18,15 +18,15 @@
                                          // mir::Constant
                                          // + span: $DIR/issue-41697.rs:18:21: 18:22
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000001)) }
-        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb1, unwind: bb2]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb2, unwind: bb1]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb1: {
-        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
-        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb2: {
+        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 }

src/test/mir-opt/issue-41697/64bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir

@@ -18,15 +18,15 @@
                                          // mir::Constant
                                          // + span: $DIR/issue-41697.rs:18:21: 18:22
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000001)) }
-        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb1, unwind: bb2]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb2, unwind: bb1]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb1: {
-        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
-        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb2: {
+        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 }

src/test/mir-opt/issue-41888/rustc.main.ElaborateDrops.after.mir

@@ -44,7 +44,7 @@ fn main() -> () {
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
         StorageLive(_1);                 // scope 0 at $DIR/issue-41888.rs:7:9: 7:10
         StorageLive(_2);                 // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
-        _2 = const cond() -> [return: bb1, unwind: bb11]; // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
+        _2 = const cond() -> [return: bb2, unwind: bb3]; // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
                                          // ty::Const
                                          // + ty: fn() -> bool {cond}
                                          // + val: Value(Scalar(<ZST>))
@@ -53,11 +53,19 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> bool {cond}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
-        switchInt(_2) -> [false: bb2, otherwise: bb3]; // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41888.rs:6:1: 15:2
     }
 
     bb2: {
+        switchInt(_2) -> [false: bb4, otherwise: bb5]; // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+    }
+
+    bb3 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    }
+
+    bb4: {
         _0 = const ();                   // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
                                          // ty::Const
                                          // + ty: ()
@@ -65,10 +73,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:8:5: 14:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
     }
 
-    bb3: {
+    bb5: {
         StorageLive(_3);                 // scope 1 at $DIR/issue-41888.rs:9:13: 9:20
         StorageLive(_4);                 // scope 1 at $DIR/issue-41888.rs:9:18: 9:19
         _4 = K;                          // scope 1 at $DIR/issue-41888.rs:9:18: 9:19
@@ -77,17 +85,21 @@ fn main() -> () {
         goto -> bb14;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
-    bb4: {
-        goto -> bb5;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
+    bb6: {
+        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
     }
 
-    bb5: {
+    bb7 (cleanup): {
+        goto -> bb3;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
+    }
+
+    bb8: {
         StorageDead(_3);                 // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
         _5 = discriminant(_1);           // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
-        switchInt(move _5) -> [0isize: bb7, otherwise: bb6]; // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
+        switchInt(move _5) -> [0isize: bb10, otherwise: bb9]; // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
     }
 
-    bb6: {
+    bb9: {
         _0 = const ();                   // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
                                          // ty::Const
                                          // + ty: ()
@@ -95,10 +107,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:10:9: 13:10
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
     }
 
-    bb7: {
+    bb10: {
         StorageLive(_6);                 // scope 1 at $DIR/issue-41888.rs:10:21: 10:23
         _9 = const false;                // scope 1 at $DIR/issue-41888.rs:10:21: 10:23
                                          // ty::Const
@@ -116,14 +128,14 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:10:29: 13:10
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         StorageDead(_6);                 // scope 1 at $DIR/issue-41888.rs:13:9: 13:10
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
     }
 
-    bb8: {
-        goto -> bb20;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb11: {
+        goto -> bb21;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb9: {
+    bb12: {
         _7 = const false;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
                                          // ty::Const
                                          // + ty: bool
@@ -150,18 +162,6 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/issue-41888.rs:15:2: 15:2
     }
 
-    bb10 (cleanup): {
-        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
-    }
-
-    bb11 (cleanup): {
-        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-    }
-
-    bb12 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41888.rs:6:1: 15:2
-    }
-
     bb13 (cleanup): {
         _7 = const true;                 // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
                                          // ty::Const
@@ -185,7 +185,7 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:9:9: 9:10
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         _1 = move _3;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
-        goto -> bb10;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
+        goto -> bb7;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
     bb14: {
@@ -211,7 +211,7 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:9:9: 9:10
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         _1 = move _3;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
-        goto -> bb4;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
+        goto -> bb6;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
     bb15: {
@@ -222,36 +222,47 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:15:1: 15:2
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
-        goto -> bb9;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb16 (cleanup): {
-        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _7 = const false;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41888.rs:15:1: 15:2
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb1;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb17: {
-        drop(_1) -> [return: bb15, unwind: bb12]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb17 (cleanup): {
+        goto -> bb16;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb18 (cleanup): {
-        drop(_1) -> bb12;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb18: {
+        drop(_1) -> [return: bb15, unwind: bb16]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb19: {
-        _10 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-        switchInt(move _10) -> [0isize: bb15, otherwise: bb17]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb19 (cleanup): {
+        drop(_1) -> bb16;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb20: {
-        switchInt(_7) -> [false: bb15, otherwise: bb19]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _10 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        switchInt(move _10) -> [0isize: bb15, otherwise: bb18]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb21 (cleanup): {
-        _11 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-        switchInt(move _11) -> [0isize: bb16, otherwise: bb18]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb21: {
+        switchInt(_7) -> [false: bb15, otherwise: bb20]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb22 (cleanup): {
-        switchInt(_7) -> [false: bb12, otherwise: bb21]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _11 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        switchInt(move _11) -> [0isize: bb17, otherwise: bb19]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    }
+
+    bb23 (cleanup): {
+        switchInt(_7) -> [false: bb16, otherwise: bb22]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 }

src/test/mir-opt/issue-49232/rustc.main.mir_map.0.mir

@@ -17,10 +17,14 @@ fn main() -> () {
     }
 
     bb1: {
-        falseUnwind -> [real: bb2, cleanup: bb11]; // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
+        falseUnwind -> [real: bb3, cleanup: bb4]; // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
     }
 
     bb2: {
+        goto -> bb14;                    // scope 0 at $DIR/issue-49232.rs:15:2: 15:2
+    }
+
+    bb3: {
         StorageLive(_2);                 // scope 0 at $DIR/issue-49232.rs:7:13: 7:19
         StorageLive(_3);                 // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
         _3 = const true;                 // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
@@ -31,14 +35,18 @@ fn main() -> () {
                                          // + span: $DIR/issue-49232.rs:8:19: 8:23
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         FakeRead(ForMatchedPlace, _3);   // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
-        switchInt(_3) -> [false: bb3, otherwise: bb4]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
+        switchInt(_3) -> [false: bb5, otherwise: bb6]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
     }
 
-    bb3: {
-        falseEdges -> [real: bb5, imaginary: bb4]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
+    bb4 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-49232.rs:5:1: 15:2
+    }
+
+    bb5: {
+        falseEdges -> [real: bb7, imaginary: bb6]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
     }
 
-    bb4: {
+    bb6: {
         _0 = const ();                   // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
                                          // ty::Const
                                          // + ty: ()
@@ -46,10 +54,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-49232.rs:10:25: 10:30
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb10;                    // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
     }
 
-    bb5: {
+    bb7: {
         _2 = const 4i32;                 // scope 0 at $DIR/issue-49232.rs:9:26: 9:27
                                          // ty::Const
                                          // + ty: i32
@@ -57,10 +65,20 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-49232.rs:9:26: 9:27
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000004)) }
-        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
+        goto -> bb12;                    // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
     }
 
-    bb6: {
+    bb8: {
+        StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
+        goto -> bb9;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+    }
+
+    bb9: {
+        StorageDead(_2);                 // scope 0 at $DIR/issue-49232.rs:14:5: 14:6
+        goto -> bb2;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+    }
+
+    bb10: {
         _4 = const ();                   // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
                                          // ty::Const
                                          // + ty: ()
@@ -71,17 +89,17 @@ fn main() -> () {
         unreachable;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
     }
 
-    bb7: {
-        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
+    bb11: {
+        goto -> bb12;                    // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
     }
 
-    bb8: {
+    bb12: {
         FakeRead(ForLet, _2);            // scope 0 at $DIR/issue-49232.rs:7:13: 7:19
         StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
         StorageLive(_5);                 // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
         StorageLive(_6);                 // scope 1 at $DIR/issue-49232.rs:13:14: 13:21
         _6 = &_2;                        // scope 1 at $DIR/issue-49232.rs:13:14: 13:21
-        _5 = const std::mem::drop::<&i32>(move _6) -> [return: bb9, unwind: bb11]; // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
+        _5 = const std::mem::drop::<&i32>(move _6) -> [return: bb13, unwind: bb4]; // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
                                          // ty::Const
                                          // + ty: fn(&i32) {std::mem::drop::<&i32>}
                                          // + val: Value(Scalar(<ZST>))
@@ -90,7 +108,7 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(&i32) {std::mem::drop::<&i32>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb9: {
+    bb13: {
         StorageDead(_6);                 // scope 1 at $DIR/issue-49232.rs:13:21: 13:22
         StorageDead(_5);                 // scope 1 at $DIR/issue-49232.rs:13:22: 13:23
         _1 = const ();                   // scope 0 at $DIR/issue-49232.rs:6:10: 14:6
@@ -104,13 +122,7 @@ fn main() -> () {
         goto -> bb1;                     // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
     }
 
-    bb10: {
-        StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
-        StorageDead(_2);                 // scope 0 at $DIR/issue-49232.rs:14:5: 14:6
+    bb14: {
         return;                          // scope 0 at $DIR/issue-49232.rs:15:2: 15:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-49232.rs:5:1: 15:2
-    }
 }

src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir

@@ -30,7 +30,7 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
         StorageLive(_3);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         StorageLive(_4);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
         _4 = std::option::Option::<u32>::None; // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
-        _3 = const <std::option::Option<u32> as std::ops::Try>::into_result(move _4) -> [return: bb1, unwind: bb12]; // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
+        _3 = const <std::option::Option<u32> as std::ops::Try>::into_result(move _4) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
                                          // ty::Const
                                          // + ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}
                                          // + val: Value(Scalar(<ZST>))
@@ -39,32 +39,40 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-62289.rs:8:1: 10:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _5 = discriminant(_3);           // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
-        switchInt(move _5) -> [0isize: bb2, 1isize: bb4, otherwise: bb3]; // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
+        switchInt(move _5) -> [0isize: bb4, 1isize: bb6, otherwise: bb5]; // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
     }
 
-    bb2: {
+    bb3 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+    }
+
+    bb4: {
         StorageLive(_10);                // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         _10 = ((_3 as Ok).0: u32);       // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         (*_2) = _10;                     // scope 4 at $DIR/issue-62289.rs:9:15: 9:20
         StorageDead(_10);                // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _1 = move _2;                    // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
-        drop(_2) -> [return: bb7, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+        drop(_2) -> [return: bb12, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
     }
 
-    bb3: {
+    bb5: {
         unreachable;                     // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
     }
 
-    bb4: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _6 = ((_3 as Err).0: std::option::NoneError); // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         StorageLive(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         StorageLive(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         _9 = _6;                         // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
-        _8 = const <std::option::NoneError as std::convert::From<std::option::NoneError>>::from(move _9) -> [return: bb5, unwind: bb12]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
+        _8 = const <std::option::NoneError as std::convert::From<std::option::NoneError>>::from(move _9) -> [return: bb8, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
                                          // ty::Const
                                          // + ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}
                                          // + val: Value(Scalar(<ZST>))
@@ -73,9 +81,13 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
+    bb7: {
+        return;                          // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
+    }
+
+    bb8: {
         StorageDead(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
-        _0 = const <std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error(move _8) -> [return: bb6, unwind: bb12]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
+        _0 = const <std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error(move _8) -> [return: bb9, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
                                          // ty::Const
                                          // + ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}
                                          // + val: Value(Scalar(<ZST>))
@@ -84,44 +96,32 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
+    bb9: {
         StorageDead(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         StorageDead(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
-        drop(_2) -> bb9;                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
-    }
-
-    bb7: {
-        StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
-        _0 = std::option::Option::<std::boxed::Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:9:5: 9:22
-        drop(_1) -> bb8;                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        drop(_2) -> bb10;                // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
     }
 
-    bb8: {
-        StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
-        StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
-        goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
-    }
-
-    bb9: {
+    bb10: {
         StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
         StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
-        goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
-    }
-
-    bb10: {
-        return;                          // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
+        goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
     }
 
     bb11 (cleanup): {
-        drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        drop(_1) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
     }
 
-    bb12 (cleanup): {
-        drop(_2) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+    bb12: {
+        StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+        _0 = std::option::Option::<std::boxed::Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:9:5: 9:22
+        drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
     }
 
-    bb13 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-62289.rs:8:1: 10:2
+    bb13: {
+        StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
+        goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
     }
 }

src/test/mir-opt/loop_test/rustc.main.SimplifyCfg-qualify-consts.after.mir

@@ -23,14 +23,18 @@ fn main() -> () {
                                          // + span: $DIR/loop_test.rs:10:8: 10:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/loop_test.rs:10:8: 10:12
-        switchInt(_2) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+        switchInt(_2) -> [false: bb3, otherwise: bb2]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
     }
 
-    bb1: {
-        falseEdges -> [real: bb3, imaginary: bb2]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/loop_test.rs:6:1: 17:2
     }
 
     bb2: {
+        falseEdges -> [real: bb4, imaginary: bb3]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+    }
+
+    bb3: {
         _1 = const ();                   // scope 0 at $DIR/loop_test.rs:10:5: 12:6
                                          // ty::Const
                                          // + ty: ()
@@ -41,10 +45,10 @@ fn main() -> () {
         StorageDead(_2);                 // scope 0 at $DIR/loop_test.rs:12:5: 12:6
         StorageDead(_1);                 // scope 0 at $DIR/loop_test.rs:12:5: 12:6
         StorageLive(_4);                 // scope 0 at $DIR/loop_test.rs:13:5: 16:6
-        goto -> bb4;                     // scope 0 at $DIR/loop_test.rs:13:5: 16:6
+        goto -> bb5;                     // scope 0 at $DIR/loop_test.rs:13:5: 16:6
     }
 
-    bb3: {
+    bb4: {
         _0 = const ();                   // scope 0 at $DIR/loop_test.rs:11:9: 11:15
                                          // ty::Const
                                          // + ty: ()
@@ -57,11 +61,11 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/loop_test.rs:17:2: 17:2
     }
 
-    bb4: {
-        falseUnwind -> [real: bb5, cleanup: bb6]; // scope 0 at $DIR/loop_test.rs:13:5: 16:6
+    bb5: {
+        falseUnwind -> [real: bb6, cleanup: bb1]; // scope 0 at $DIR/loop_test.rs:13:5: 16:6
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/loop_test.rs:14:13: 14:14
         _6 = const 1i32;                 // scope 0 at $DIR/loop_test.rs:14:17: 14:18
                                          // ty::Const
@@ -72,10 +76,6 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         FakeRead(ForLet, _6);            // scope 0 at $DIR/loop_test.rs:14:13: 14:14
         StorageDead(_6);                 // scope 0 at $DIR/loop_test.rs:16:5: 16:6
-        goto -> bb4;                     // scope 0 at $DIR/loop_test.rs:1:1: 1:1
-    }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/loop_test.rs:6:1: 17:2
+        goto -> bb5;                     // scope 0 at $DIR/loop_test.rs:15:9: 15:17
     }
 }

src/test/mir-opt/match-arm-scopes/rustc.complicated_match.ElaborateDrops.after.mir

@@ -30,26 +30,30 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
     }
 
     bb0: {
-        switchInt((_2.0: bool)) -> [false: bb5, otherwise: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
+        switchInt((_2.0: bool)) -> [false: bb6, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
     }
 
-    bb1: {
-        switchInt((_2.1: bool)) -> [false: bb10, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
     }
 
     bb2: {
-        switchInt((_2.0: bool)) -> [false: bb3, otherwise: bb17]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+        switchInt((_2.1: bool)) -> [false: bb14, otherwise: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
     }
 
     bb3: {
+        switchInt((_2.0: bool)) -> [false: bb4, otherwise: bb21]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+    }
+
+    bb4: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
-        goto -> bb16;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb4: {
+    bb5: {
         _0 = const 1i32;                 // scope 1 at $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // ty::Const
                                          // + ty: i32
@@ -57,10 +61,10 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
-        drop(_7) -> [return: bb15, unwind: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        drop(_7) -> [return: bb19, unwind: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _6 = &(_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
@@ -68,16 +72,16 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
         StorageLive(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _10 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_10) -> [false: bb6, otherwise: bb7]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_10) -> [false: bb7, otherwise: bb8]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb6: {
+    bb7: {
         _9 = (*_6);                      // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _9) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _9) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb7: {
+    bb8: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -87,26 +91,40 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb11;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb8: {
+    bb9: {
+        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
+    }
+
+    bb10 (cleanup): {
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb11: {
+        drop(_2) -> [return: bb9, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb12: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageLive(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _5 = (_2.1: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
-        goto -> bb4;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb5;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb9: {
+    bb13: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        goto -> bb2;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb10: {
+    bb14: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _6 = &(_2.0: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
@@ -114,16 +132,16 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
         StorageLive(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _13 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_13) -> [false: bb11, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_13) -> [false: bb15, otherwise: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb11: {
+    bb15: {
         _12 = (*_6);                     // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _12) -> [false: bb14, otherwise: bb13]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _12) -> [false: bb18, otherwise: bb17]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb12: {
+    bb16: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -133,34 +151,36 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb11;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb13: {
+    bb17: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageLive(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _5 = (_2.0: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
-        goto -> bb4;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb5;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb14: {
+    bb18: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb2;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        goto -> bb3;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb15: {
+    bb19: {
         StorageDead(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb19;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb16: {
+    bb20: {
         _0 = const 2i32;                 // scope 2 at $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // ty::Const
                                          // + ty: i32
@@ -168,58 +188,48 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
-        drop(_16) -> [return: bb18, unwind: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
+        drop(_16) -> [return: bb22, unwind: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
     }
 
-    bb17: {
+    bb21: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
-        goto -> bb16;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb18: {
+    bb22: {
         StorageDead(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
         StorageDead(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
-        goto -> bb19;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb19: {
-        goto -> bb26;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb23: {
+        goto -> bb29;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb20: {
-        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        drop(_2) -> [return: bb21, unwind: bb23]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb24 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb21: {
-        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
-    }
-
-    bb22 (cleanup): {
-        goto -> bb27;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb23 (cleanup): {
-        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
+    bb25 (cleanup): {
+        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb24: {
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb26: {
+        goto -> bb9;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb25 (cleanup): {
-        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb27 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb26: {
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb28 (cleanup): {
+        goto -> bb27;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb27 (cleanup): {
-        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb29: {
+        goto -> bb26;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 }

src/test/mir-opt/match-arm-scopes/rustc.complicated_match.SimplifyCfg-initial.after.mir

@@ -31,38 +31,42 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
 
     bb0: {
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match-arm-scopes.rs:15:11: 15:16
-        switchInt((_2.0: bool)) -> [false: bb1, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
+        switchInt((_2.0: bool)) -> [false: bb2, otherwise: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
     }
 
-    bb1: {
-        falseEdges -> [real: bb8, imaginary: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:9: 16:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
     }
 
     bb2: {
-        switchInt((_2.1: bool)) -> [false: bb3, otherwise: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
+        falseEdges -> [real: bb9, imaginary: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:9: 16:22
     }
 
     bb3: {
-        falseEdges -> [real: bb14, imaginary: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:25: 16:38
+        switchInt((_2.1: bool)) -> [false: bb4, otherwise: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
     }
 
     bb4: {
-        switchInt((_2.0: bool)) -> [false: bb6, otherwise: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+        falseEdges -> [real: bb18, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:16:25: 16:38
     }
 
     bb5: {
-        falseEdges -> [real: bb22, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:17:9: 17:21
+        switchInt((_2.0: bool)) -> [false: bb7, otherwise: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
     }
 
     bb6: {
+        falseEdges -> [real: bb26, imaginary: bb7]; // scope 0 at $DIR/match-arm-scopes.rs:17:9: 17:21
+    }
+
+    bb7: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb7: {
+    bb8: {
         _0 = const 1i32;                 // scope 1 at $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // ty::Const
                                          // + ty: i32
@@ -70,10 +74,10 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
-        drop(_7) -> [return: bb20, unwind: bb27]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        drop(_7) -> [return: bb24, unwind: bb14]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
     }
 
-    bb8: {
+    bb9: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _6 = &(_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
@@ -84,20 +88,20 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _10 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         FakeRead(ForMatchedPlace, _10);  // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_10) -> [false: bb10, otherwise: bb9]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_10) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb9: {
-        falseEdges -> [real: bb11, imaginary: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+    bb10: {
+        falseEdges -> [real: bb12, imaginary: bb11]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb10: {
+    bb11: {
         _9 = (*_6);                      // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _9) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _9) -> [false: bb17, otherwise: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb11: {
+    bb12: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -107,10 +111,24 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb15;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb12: {
+    bb13: {
+        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
+    }
+
+    bb14 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb15: {
+        drop(_2) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb16: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         FakeRead(ForMatchGuard, _3);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
@@ -120,17 +138,17 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         _5 = (_2.1: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
-        goto -> bb7;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb8;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb13: {
+    bb17: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        falseEdges -> [real: bb2, imaginary: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        falseEdges -> [real: bb3, imaginary: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb14: {
+    bb18: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _6 = &(_2.0: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
@@ -141,20 +159,20 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _13 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         FakeRead(ForMatchedPlace, _13);  // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_13) -> [false: bb16, otherwise: bb15]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_13) -> [false: bb20, otherwise: bb19]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb15: {
-        falseEdges -> [real: bb17, imaginary: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+    bb19: {
+        falseEdges -> [real: bb21, imaginary: bb20]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb16: {
+    bb20: {
         _12 = (*_6);                     // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _12) -> [false: bb19, otherwise: bb18]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _12) -> [false: bb23, otherwise: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb17: {
+    bb21: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -164,10 +182,12 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb15;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb18: {
+    bb22: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         FakeRead(ForMatchGuard, _3);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
@@ -177,25 +197,25 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         _5 = (_2.0: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
-        goto -> bb7;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb8;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb19: {
+    bb23: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        falseEdges -> [real: bb4, imaginary: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        falseEdges -> [real: bb5, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb20: {
+    bb24: {
         StorageDead(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb28;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb21: {
+    bb25: {
         _0 = const 2i32;                 // scope 2 at $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // ty::Const
                                          // + ty: i32
@@ -203,42 +223,24 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
-        drop(_16) -> [return: bb23, unwind: bb27]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
+        drop(_16) -> [return: bb27, unwind: bb14]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
     }
 
-    bb22: {
+    bb26: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb23: {
+    bb27: {
         StorageDead(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
         StorageDead(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
-    }
-
-    bb24: {
-        drop(_2) -> [return: bb26, unwind: bb28]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb25: {
-        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        drop(_2) -> [return: bb26, unwind: bb28]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb26: {
-        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
-    }
-
-    bb27 (cleanup): {
-        drop(_2) -> bb28;                // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+        goto -> bb28;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb28 (cleanup): {
-        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
+    bb28: {
+        drop(_2) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 }

src/test/mir-opt/match_false_edges/rustc.full_tested_match.PromoteTemps.after.mir

@@ -35,10 +35,14 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x0000002a)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
         _3 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
-        switchInt(move _3) -> [0isize: bb1, 1isize: bb2, otherwise: bb4]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
+        switchInt(move _3) -> [0isize: bb2, 1isize: bb3, otherwise: bb5]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:14:1: 20:2
+    }
+
+    bb2: {
         _1 = (const 3i32, const 3i32);   // scope 0 at $DIR/match_false_edges.rs:18:17: 18:23
                                          // ty::Const
                                          // + ty: i32
@@ -52,22 +56,22 @@ fn full_tested_match() -> () {
                                          // mir::Constant
                                          // + span: $DIR/match_false_edges.rs:18:21: 18:22
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
-    }
-
-    bb2: {
-        falseEdges -> [real: bb5, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
     bb3: {
-        falseEdges -> [real: bb9, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:17:9: 17:16
+        falseEdges -> [real: bb6, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
     }
 
     bb4: {
-        unreachable;                     // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
+        falseEdges -> [real: bb10, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:17:9: 17:16
     }
 
     bb5: {
+        unreachable;                     // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
+    }
+
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
         _11 = const full_tested_match::promoted[0]; // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
                                          // ty::Const
@@ -79,7 +83,7 @@ fn full_tested_match() -> () {
         _6 = &(((*_11) as Some).0: i32); // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
         _4 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
-        _7 = const guard() -> [return: bb6, unwind: bb11]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+        _7 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -88,11 +92,11 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _7) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+    bb7: {
+        switchInt(move _7) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match_false_edges.rs:16:26: 16:27
         FakeRead(ForGuardBinding, _6);   // scope 0 at $DIR/match_false_edges.rs:16:26: 16:27
@@ -110,16 +114,16 @@ fn full_tested_match() -> () {
         StorageDead(_8);                 // scope 2 at $DIR/match_false_edges.rs:16:36: 16:37
         StorageDead(_5);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
-        goto -> bb3;                     // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+        goto -> bb4;                     // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
     }
 
-    bb9: {
+    bb10: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:17:14: 17:15
         _9 = ((_2 as Some).0: i32);      // scope 0 at $DIR/match_false_edges.rs:17:14: 17:15
         StorageLive(_10);                // scope 3 at $DIR/match_false_edges.rs:17:24: 17:25
@@ -133,10 +137,10 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_10);                // scope 3 at $DIR/match_false_edges.rs:17:25: 17:26
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:17:26: 17:27
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
-    bb10: {
+    bb11: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:19:6: 19:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:19:6: 19:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:14:28: 20:2
@@ -148,8 +152,4 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:20:2: 20:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:14:1: 20:2
-    }
 }

src/test/mir-opt/match_false_edges/rustc.full_tested_match2.PromoteTemps.before.mir

@@ -34,18 +34,22 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x0000002a)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
         _3 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
-        switchInt(move _3) -> [0isize: bb1, 1isize: bb2, otherwise: bb4]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+        switchInt(move _3) -> [0isize: bb2, 1isize: bb3, otherwise: bb5]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
     }
 
-    bb1: {
-        falseEdges -> [real: bb9, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:28:9: 28:13
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:25:1: 31:2
     }
 
     bb2: {
-        falseEdges -> [real: bb5, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+        falseEdges -> [real: bb10, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:28:9: 28:13
     }
 
     bb3: {
+        falseEdges -> [real: bb6, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+    }
+
+    bb4: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:29:14: 29:15
         _9 = ((_2 as Some).0: i32);      // scope 0 at $DIR/match_false_edges.rs:29:14: 29:15
         StorageLive(_10);                // scope 3 at $DIR/match_false_edges.rs:29:24: 29:25
@@ -59,19 +63,19 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_10);                // scope 3 at $DIR/match_false_edges.rs:29:25: 29:26
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:29:26: 29:27
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb4: {
+    bb5: {
         unreachable;                     // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:14: 27:15
         _6 = &((_2 as Some).0: i32);     // scope 0 at $DIR/match_false_edges.rs:27:14: 27:15
         _4 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
-        _7 = const guard() -> [return: bb6, unwind: bb11]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+        _7 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -80,11 +84,11 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _7) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+    bb7: {
+        switchInt(move _7) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match_false_edges.rs:27:26: 27:27
         FakeRead(ForGuardBinding, _6);   // scope 0 at $DIR/match_false_edges.rs:27:26: 27:27
@@ -102,16 +106,16 @@ fn full_tested_match2() -> () {
         StorageDead(_8);                 // scope 2 at $DIR/match_false_edges.rs:27:36: 27:37
         StorageDead(_5);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
-        falseEdges -> [real: bb3, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+        falseEdges -> [real: bb4, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
     }
 
-    bb9: {
+    bb10: {
         _1 = (const 3i32, const 3i32);   // scope 0 at $DIR/match_false_edges.rs:28:17: 28:23
                                          // ty::Const
                                          // + ty: i32
@@ -125,10 +129,10 @@ fn full_tested_match2() -> () {
                                          // mir::Constant
                                          // + span: $DIR/match_false_edges.rs:28:21: 28:22
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb10: {
+    bb11: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:30:6: 30:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:30:6: 30:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:25:29: 31:2
@@ -140,8 +144,4 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:31:2: 31:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:25:1: 31:2
-    }
 }

src/test/mir-opt/match_false_edges/rustc.main.PromoteTemps.before.mir

@@ -45,18 +45,22 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         _4 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
-        switchInt(move _4) -> [1isize: bb2, otherwise: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+        switchInt(move _4) -> [1isize: bb3, otherwise: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
     }
 
-    bb1: {
-        falseEdges -> [real: bb9, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:34:1: 41:2
     }
 
     bb2: {
-        falseEdges -> [real: bb5, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+        falseEdges -> [real: bb10, imaginary: bb5]; // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
     }
 
     bb3: {
+        falseEdges -> [real: bb6, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+    }
+
+    bb4: {
         StorageLive(_14);                // scope 0 at $DIR/match_false_edges.rs:39:9: 39:11
         _14 = _2;                        // scope 0 at $DIR/match_false_edges.rs:39:9: 39:11
         _1 = const 4i32;                 // scope 5 at $DIR/match_false_edges.rs:39:15: 39:16
@@ -67,19 +71,19 @@ fn main() -> () {
                                          // + span: $DIR/match_false_edges.rs:39:15: 39:16
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000004)) }
         StorageDead(_14);                // scope 0 at $DIR/match_false_edges.rs:39:16: 39:17
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb4: {
-        falseEdges -> [real: bb10, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:38:9: 38:16
+    bb5: {
+        falseEdges -> [real: bb11, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:38:9: 38:16
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:14: 36:16
         _7 = &((_2 as Some).0: i32);     // scope 0 at $DIR/match_false_edges.rs:36:14: 36:16
         _5 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         StorageLive(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
-        _8 = const guard() -> [return: bb6, unwind: bb15]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+        _8 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -88,11 +92,11 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _8) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+    bb7: {
+        switchInt(move _8) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         FakeRead(ForMatchGuard, _5);     // scope 0 at $DIR/match_false_edges.rs:36:27: 36:28
         FakeRead(ForGuardBinding, _7);   // scope 0 at $DIR/match_false_edges.rs:36:27: 36:28
@@ -107,16 +111,16 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
-        falseEdges -> [real: bb1, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+        falseEdges -> [real: bb2, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
     }
 
-    bb9: {
+    bb10: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
         _9 = _2;                         // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
         _1 = const 2i32;                 // scope 3 at $DIR/match_false_edges.rs:37:15: 37:16
@@ -127,17 +131,17 @@ fn main() -> () {
                                          // + span: $DIR/match_false_edges.rs:37:15: 37:16
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:37:16: 37:17
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb10: {
+    bb11: {
         StorageLive(_11);                // scope 0 at $DIR/match_false_edges.rs:38:14: 38:15
         _11 = &((_2 as Some).0: i32);    // scope 0 at $DIR/match_false_edges.rs:38:14: 38:15
         _5 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         StorageLive(_12);                // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
         StorageLive(_13);                // scope 0 at $DIR/match_false_edges.rs:38:27: 38:28
         _13 = (*_11);                    // scope 0 at $DIR/match_false_edges.rs:38:27: 38:28
-        _12 = const guard2(move _13) -> [return: bb11, unwind: bb15]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        _12 = const guard2(move _13) -> [return: bb12, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
                                          // ty::Const
                                          // + ty: fn(i32) -> bool {guard2}
                                          // + val: Value(Scalar(<ZST>))
@@ -146,12 +150,12 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(i32) -> bool {guard2}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb11: {
+    bb12: {
         StorageDead(_13);                // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
-        switchInt(move _12) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        switchInt(move _12) -> [false: bb14, otherwise: bb13]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
     }
 
-    bb12: {
+    bb13: {
         StorageDead(_12);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         FakeRead(ForMatchGuard, _5);     // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
         FakeRead(ForGuardBinding, _11);  // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
@@ -166,16 +170,16 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         StorageDead(_11);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb13: {
+    bb14: {
         StorageDead(_12);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         StorageDead(_11);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
-        falseEdges -> [real: bb3, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        falseEdges -> [real: bb4, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
     }
 
-    bb14: {
+    bb15: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:40:6: 40:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:40:6: 40:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:34:11: 41:2
@@ -187,8 +191,4 @@ fn main() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:41:2: 41:2
     }
-
-    bb15 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:34:1: 41:2
-    }
 }

src/test/mir-opt/nll/region-subtyping-basic/32bit/rustc.main.nll.0.mir

@@ -5,21 +5,21 @@
 | '_#1r | Local | ['_#1r]
 |
 | Inferred Region Values
-| '_#0r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#0r, '_#1r}
-| '_#1r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#1r}
+| '_#0r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#0r, '_#1r}
+| '_#1r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#1r}
 | '_#2r | U0 | {}
-| '_#3r | U0 | {bb1[0..=8], bb2[0], bb4[0..=2]}
-| '_#4r | U0 | {bb1[1..=8], bb2[0], bb4[0..=2]}
-| '_#5r | U0 | {bb1[4..=8], bb2[0], bb4[0..=2]}
+| '_#3r | U0 | {bb2[0..=8], bb3[0], bb5[0..=2]}
+| '_#4r | U0 | {bb2[1..=8], bb3[0], bb5[0..=2]}
+| '_#5r | U0 | {bb2[4..=8], bb3[0], bb5[0..=2]}
 |
 | Inference Constraints
-| '_#0r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#1r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#3r live at {bb1[0]}
-| '_#4r live at {bb1[1..=3]}
-| '_#5r live at {bb1[4..=8], bb2[0], bb4[0..=2]}
-| '_#3r: '_#4r due to Assignment at Single(bb1[0])
-| '_#4r: '_#5r due to Assignment at Single(bb1[3])
+| '_#0r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#1r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#3r live at {bb2[0]}
+| '_#4r live at {bb2[1..=3]}
+| '_#5r live at {bb2[4..=8], bb3[0], bb5[0..=2]}
+| '_#3r: '_#4r due to Assignment at Single(bb2[0])
+| '_#4r: '_#5r due to Assignment at Single(bb2[3])
 |
 fn main() -> () {
     let mut _0: ();                      // return place in scope 0 at $DIR/region-subtyping-basic.rs:16:11: 16:11
@@ -76,34 +76,38 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000000)) }
         _4 = Len(_1);                    // bb0[6]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
         _5 = Lt(_3, _4);                 // bb0[7]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
-        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb1, unwind: bb8]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
+        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb2, unwind: bb1]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
     }
 
-    bb1: {
-        _2 = &'_#3r _1[_3];              // bb1[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
-        FakeRead(ForLet, _2);            // bb1[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
-        StorageLive(_6);                 // bb1[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        _6 = _2;                         // bb1[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
-        FakeRead(ForLet, _6);            // bb1[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        StorageLive(_7);                 // bb1[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        _7 = const Const(Value(Scalar(0x01)): bool); // bb1[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+    bb1 (cleanup): {
+        resume;                          // bb1[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    }
+
+    bb2: {
+        _2 = &'_#3r _1[_3];              // bb2[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
+        FakeRead(ForLet, _2);            // bb2[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
+        StorageLive(_6);                 // bb2[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        _6 = _2;                         // bb2[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
+        FakeRead(ForLet, _6);            // bb2[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        StorageLive(_7);                 // bb2[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        _7 = const Const(Value(Scalar(0x01)): bool); // bb2[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // ty::Const
                                          // + ty: bool
                                          // + val: Value(Scalar(0x01))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
-        FakeRead(ForMatchedPlace, _7);   // bb1[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb3, otherwise: bb2]; // bb1[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        FakeRead(ForMatchedPlace, _7);   // bb2[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb4, otherwise: bb3]; // bb2[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb2: {
-        falseEdges -> [real: bb4, imaginary: bb3]; // bb2[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+    bb3: {
+        falseEdges -> [real: bb5, imaginary: bb4]; // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb3: {
-        StorageLive(_10);                // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
-        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x00000016)): usize)) -> [return: bb6, unwind: bb8]; // bb3[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+    bb4: {
+        StorageLive(_10);                // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x00000016)): usize)) -> [return: bb7, unwind: bb1]; // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -118,11 +122,11 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000016)) }
     }
 
-    bb4: {
-        StorageLive(_8);                 // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
-        StorageLive(_9);                 // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _9 = (*_6);                      // bb4[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb5, unwind: bb8]; // bb4[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+    bb5: {
+        StorageLive(_8);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+        StorageLive(_9);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _9 = (*_6);                      // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb6, unwind: bb1]; // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -131,41 +135,37 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(usize) -> bool {use_x}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
-        StorageDead(_9);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
-        StorageDead(_8);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
+    bb6: {
+        StorageDead(_9);                 // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
+        StorageDead(_8);                 // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        goto -> bb8;                     // bb6[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb6: {
-        StorageDead(_10);                // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
+    bb7: {
+        StorageDead(_10);                // bb7[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb7[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
-    }
-
-    bb7: {
-        StorageDead(_6);                 // bb7[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_3);                 // bb7[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_2);                 // bb7[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_1);                 // bb7[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_7);                 // bb7[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        return;                          // bb7[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
+        goto -> bb8;                     // bb7[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb8 (cleanup): {
-        resume;                          // bb8[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    bb8: {
+        StorageDead(_6);                 // bb8[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_3);                 // bb8[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_2);                 // bb8[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_1);                 // bb8[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_7);                 // bb8[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        return;                          // bb8[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
     }
 }

src/test/mir-opt/nll/region-subtyping-basic/64bit/rustc.main.nll.0.mir

@@ -5,21 +5,21 @@
 | '_#1r | Local | ['_#1r]
 |
 | Inferred Region Values
-| '_#0r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#0r, '_#1r}
-| '_#1r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#1r}
+| '_#0r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#0r, '_#1r}
+| '_#1r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#1r}
 | '_#2r | U0 | {}
-| '_#3r | U0 | {bb1[0..=8], bb2[0], bb4[0..=2]}
-| '_#4r | U0 | {bb1[1..=8], bb2[0], bb4[0..=2]}
-| '_#5r | U0 | {bb1[4..=8], bb2[0], bb4[0..=2]}
+| '_#3r | U0 | {bb2[0..=8], bb3[0], bb5[0..=2]}
+| '_#4r | U0 | {bb2[1..=8], bb3[0], bb5[0..=2]}
+| '_#5r | U0 | {bb2[4..=8], bb3[0], bb5[0..=2]}
 |
 | Inference Constraints
-| '_#0r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#1r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#3r live at {bb1[0]}
-| '_#4r live at {bb1[1..=3]}
-| '_#5r live at {bb1[4..=8], bb2[0], bb4[0..=2]}
-| '_#3r: '_#4r due to Assignment at Single(bb1[0])
-| '_#4r: '_#5r due to Assignment at Single(bb1[3])
+| '_#0r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#1r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#3r live at {bb2[0]}
+| '_#4r live at {bb2[1..=3]}
+| '_#5r live at {bb2[4..=8], bb3[0], bb5[0..=2]}
+| '_#3r: '_#4r due to Assignment at Single(bb2[0])
+| '_#4r: '_#5r due to Assignment at Single(bb2[3])
 |
 fn main() -> () {
     let mut _0: ();                      // return place in scope 0 at $DIR/region-subtyping-basic.rs:16:11: 16:11
@@ -76,34 +76,38 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000000)) }
         _4 = Len(_1);                    // bb0[6]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
         _5 = Lt(_3, _4);                 // bb0[7]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
-        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb1, unwind: bb8]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
+        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb2, unwind: bb1]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
     }
 
-    bb1: {
-        _2 = &'_#3r _1[_3];              // bb1[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
-        FakeRead(ForLet, _2);            // bb1[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
-        StorageLive(_6);                 // bb1[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        _6 = _2;                         // bb1[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
-        FakeRead(ForLet, _6);            // bb1[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        StorageLive(_7);                 // bb1[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        _7 = const Const(Value(Scalar(0x01)): bool); // bb1[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+    bb1 (cleanup): {
+        resume;                          // bb1[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    }
+
+    bb2: {
+        _2 = &'_#3r _1[_3];              // bb2[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
+        FakeRead(ForLet, _2);            // bb2[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
+        StorageLive(_6);                 // bb2[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        _6 = _2;                         // bb2[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
+        FakeRead(ForLet, _6);            // bb2[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        StorageLive(_7);                 // bb2[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        _7 = const Const(Value(Scalar(0x01)): bool); // bb2[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // ty::Const
                                          // + ty: bool
                                          // + val: Value(Scalar(0x01))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
-        FakeRead(ForMatchedPlace, _7);   // bb1[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb3, otherwise: bb2]; // bb1[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        FakeRead(ForMatchedPlace, _7);   // bb2[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb4, otherwise: bb3]; // bb2[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb2: {
-        falseEdges -> [real: bb4, imaginary: bb3]; // bb2[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+    bb3: {
+        falseEdges -> [real: bb5, imaginary: bb4]; // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb3: {
-        StorageLive(_10);                // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
-        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x0000000000000016)): usize)) -> [return: bb6, unwind: bb8]; // bb3[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+    bb4: {
+        StorageLive(_10);                // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x0000000000000016)): usize)) -> [return: bb7, unwind: bb1]; // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -118,11 +122,11 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000016)) }
     }
 
-    bb4: {
-        StorageLive(_8);                 // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
-        StorageLive(_9);                 // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _9 = (*_6);                      // bb4[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb5, unwind: bb8]; // bb4[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+    bb5: {
+        StorageLive(_8);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+        StorageLive(_9);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _9 = (*_6);                      // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb6, unwind: bb1]; // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -131,41 +135,37 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(usize) -> bool {use_x}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
-        StorageDead(_9);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
-        StorageDead(_8);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
+    bb6: {
+        StorageDead(_9);                 // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
+        StorageDead(_8);                 // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        goto -> bb8;                     // bb6[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb6: {
-        StorageDead(_10);                // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
+    bb7: {
+        StorageDead(_10);                // bb7[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb7[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
-    }
-
-    bb7: {
-        StorageDead(_6);                 // bb7[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_3);                 // bb7[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_2);                 // bb7[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_1);                 // bb7[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_7);                 // bb7[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        return;                          // bb7[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
+        goto -> bb8;                     // bb7[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb8 (cleanup): {
-        resume;                          // bb8[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    bb8: {
+        StorageDead(_6);                 // bb8[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_3);                 // bb8[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_2);                 // bb8[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_1);                 // bb8[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_7);                 // bb8[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        return;                          // bb8[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
     }
 }

src/test/mir-opt/no-drop-for-inactive-variant/rustc.unwrap.SimplifyCfg-elaborate-drops.after.mir

@@ -14,12 +14,16 @@ fn unwrap(_1: std::option::Option<T>) -> T {
 
     bb0: {
         _2 = discriminant(_1);           // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
-        switchInt(move _2) -> [0isize: bb1, 1isize: bb3, otherwise: bb2]; // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
+        switchInt(move _2) -> [0isize: bb2, 1isize: bb4, otherwise: bb3]; // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:7:1: 12:2
+    }
+
+    bb2: {
         StorageLive(_4);                 // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
-        const std::rt::begin_panic::<&str>(const "explicit panic") -> bb4; // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
+        const std::rt::begin_panic::<&str>(const "explicit panic") -> bb5; // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
                                          // ty::Const
                                          // + ty: fn(&str) -> ! {std::rt::begin_panic::<&str>}
                                          // + val: Value(Scalar(<ZST>))
@@ -34,11 +38,11 @@ fn unwrap(_1: std::option::Option<T>) -> T {
                                          // + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [101, 120, 112, 108, 105, 99, 105, 116, 32, 112, 97, 110, 105, 99], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [16383], len: Size { raw: 14 } }, size: Size { raw: 14 }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 14 }) }
     }
 
-    bb2: {
+    bb3: {
         unreachable;                     // scope 0 at $DIR/no-drop-for-inactive-variant.rs:8:11: 8:14
     }
 
-    bb3: {
+    bb4: {
         StorageLive(_3);                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:14: 9:15
         _3 = move ((_1 as Some).0: T);   // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:14: 9:15
         _0 = move _3;                    // scope 1 at $DIR/no-drop-for-inactive-variant.rs:9:20: 9:21
@@ -47,11 +51,7 @@ fn unwrap(_1: std::option::Option<T>) -> T {
         return;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:2: 12:2
     }
 
-    bb4 (cleanup): {
-        drop(_1) -> bb5;                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:1: 12:2
-    }
-
     bb5 (cleanup): {
-        resume;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:7:1: 12:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:1: 12:2
     }
 }

src/test/mir-opt/simplify_try/rustc.try_identity.SimplifyArmIdentity.diff

@@ -83,7 +83,7 @@
 +         _0 = move _3;                    // scope 8 at $SRC_DIR/libcore/result.rs:LL:COL
           StorageDead(_3);                 // scope 0 at $DIR/simplify_try.rs:6:15: 6:16
           StorageDead(_2);                 // scope 0 at $DIR/simplify_try.rs:8:1: 8:2
-          goto -> bb3;                     // scope 0 at $DIR/simplify_try.rs:8:2: 8:2
+          goto -> bb3;                     // scope 0 at $DIR/simplify_try.rs:6:14: 6:15
       }
   
       bb3: {

src/test/mir-opt/storage_live_dead_in_statics/rustc.XXX.mir_map.0.mir

@@ -663,4 +663,8 @@ static XXX: &Foo = {
         StorageDead(_1);                 // scope 0 at $DIR/storage_live_dead_in_statics.rs:23:1: 23:2
         return;                          // scope 0 at $DIR/storage_live_dead_in_statics.rs:5:1: 23:3
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/storage_live_dead_in_statics.rs:5:1: 23:3
+    }
 }

src/test/mir-opt/unusual-item-types/32bit/rustc.E-V-{{constant}}.mir_map.0.mir

@@ -13,4 +13,8 @@ E::V::{{constant}}#0: isize = {
                                          // + literal: Const { ty: isize, val: Value(Scalar(0x00000005)) }
         return;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
+    }
 }