pass full InstanceDef to run_passes

src/librustc_mir/borrow_check/nll/type_check/mod.rs

@@ -2428,7 +2428,7 @@ pub struct TypeckMir;
 
 impl MirPass for TypeckMir {
     fn run_pass<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, src: MirSource, mir: &mut Mir<'tcx>) {
-        let def_id = src.def_id;
+        let def_id = src.def_id();
         debug!("run_pass: {:?}", def_id);
 
         // When NLL is enabled, the borrow checker runs the typeck

src/librustc_mir/shim.rs

@@ -116,7 +116,7 @@ fn make_shim<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     };
     debug!("make_shim({:?}) = untransformed {:?}", instance, result);
 
-    run_passes(tcx, &mut result, instance.def_id(), MirPhase::Const, &[
+    run_passes(tcx, &mut result, instance, MirPhase::Const, &[
         &add_moves_for_packed_drops::AddMovesForPackedDrops,
         &no_landing_pads::NoLandingPads,
         &remove_noop_landing_pads::RemoveNoopLandingPads,

src/librustc_mir/transform/add_moves_for_packed_drops.rs

@@ -46,7 +46,7 @@ impl MirPass for AddMovesForPackedDrops {
                           mir: &mut Mir<'tcx>)
     {
         debug!("add_moves_for_packed_drops({:?} @ {:?})", src, mir.span);
-        add_moves_for_packed_drops(tcx, mir, src.def_id);
+        add_moves_for_packed_drops(tcx, mir, src.def_id());
     }
 }
 

src/librustc_mir/transform/const_prop.rs

@@ -30,31 +30,31 @@ pub struct ConstProp;
 impl MirPass for ConstProp {
     fn run_pass<'a, 'tcx>(&self,
                           tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                          source: MirSource,
+                          source: MirSource<'tcx>,
                           mir: &mut Mir<'tcx>) {
         // will be evaluated by miri and produce its errors there
         if source.promoted.is_some() {
             return;
         }
 
         use rustc::hir::map::blocks::FnLikeNode;
-        let node_id = tcx.hir().as_local_node_id(source.def_id)
+        let node_id = tcx.hir().as_local_node_id(source.def_id())
                              .expect("Non-local call to local provider is_const_fn");
 
         let is_fn_like = FnLikeNode::from_node(tcx.hir().get(node_id)).is_some();
-        let is_assoc_const = match tcx.describe_def(source.def_id) {
+        let is_assoc_const = match tcx.describe_def(source.def_id()) {
             Some(Def::AssociatedConst(_)) => true,
             _ => false,
         };
 
         // Only run const prop on functions, methods, closures and associated constants
         if !is_fn_like && !is_assoc_const  {
             // skip anon_const/statics/consts because they'll be evaluated by miri anyway
-            trace!("ConstProp skipped for {:?}", source.def_id);
+            trace!("ConstProp skipped for {:?}", source.def_id());
             return
         }
 
-        trace!("ConstProp starting for {:?}", source.def_id);
+        trace!("ConstProp starting for {:?}", source.def_id());
 
         // FIXME(oli-obk, eddyb) Optimize locals (or even local paths) to hold
         // constants, instead of just checking for const-folding succeeding.
@@ -63,7 +63,7 @@ impl MirPass for ConstProp {
         let mut optimization_finder = ConstPropagator::new(mir, tcx, source);
         optimization_finder.visit_mir(mir);
 
-        trace!("ConstProp done for {:?}", source.def_id);
+        trace!("ConstProp done for {:?}", source.def_id());
     }
 }
 
@@ -74,7 +74,7 @@ struct ConstPropagator<'a, 'mir, 'tcx:'a+'mir> {
     ecx: EvalContext<'a, 'mir, 'tcx, CompileTimeInterpreter<'a, 'mir, 'tcx>>,
     mir: &'mir Mir<'tcx>,
     tcx: TyCtxt<'a, 'tcx, 'tcx>,
-    source: MirSource,
+    source: MirSource<'tcx>,
     places: IndexVec<Local, Option<Const<'tcx>>>,
     can_const_prop: IndexVec<Local, bool>,
     param_env: ParamEnv<'tcx>,
@@ -107,10 +107,10 @@ impl<'a, 'mir, 'tcx> ConstPropagator<'a, 'mir, 'tcx> {
     fn new(
         mir: &'mir Mir<'tcx>,
         tcx: TyCtxt<'a, 'tcx, 'tcx>,
-        source: MirSource,
+        source: MirSource<'tcx>,
     ) -> ConstPropagator<'a, 'mir, 'tcx> {
-        let param_env = tcx.param_env(source.def_id);
-        let ecx = mk_eval_cx(tcx, tcx.def_span(source.def_id), param_env);
+        let param_env = tcx.param_env(source.def_id());
+        let ecx = mk_eval_cx(tcx, tcx.def_span(source.def_id()), param_env);
         ConstPropagator {
             ecx,
             mir,
@@ -284,13 +284,13 @@ impl<'a, 'mir, 'tcx> ConstPropagator<'a, 'mir, 'tcx> {
                 _ => None,
             },
             Place::Promoted(ref promoted) => {
-                let generics = self.tcx.generics_of(self.source.def_id);
+                let generics = self.tcx.generics_of(self.source.def_id());
                 if generics.requires_monomorphization(self.tcx) {
                     // FIXME: can't handle code with generics
                     return None;
                 }
-                let substs = Substs::identity_for_item(self.tcx, self.source.def_id);
-                let instance = Instance::new(self.source.def_id, substs);
+                let substs = Substs::identity_for_item(self.tcx, self.source.def_id());
+                let instance = Instance::new(self.source.def_id(), substs);
                 let cid = GlobalId {
                     instance,
                     promoted: Some(promoted.0),
@@ -358,10 +358,10 @@ impl<'a, 'mir, 'tcx> ConstPropagator<'a, 'mir, 'tcx> {
                 )))
             }
             Rvalue::UnaryOp(op, ref arg) => {
-                let def_id = if self.tcx.is_closure(self.source.def_id) {
-                    self.tcx.closure_base_def_id(self.source.def_id)
+                let def_id = if self.tcx.is_closure(self.source.def_id()) {
+                    self.tcx.closure_base_def_id(self.source.def_id())
                 } else {
-                    self.source.def_id
+                    self.source.def_id()
                 };
                 let generics = self.tcx.generics_of(def_id);
                 if generics.requires_monomorphization(self.tcx) {
@@ -398,10 +398,10 @@ impl<'a, 'mir, 'tcx> ConstPropagator<'a, 'mir, 'tcx> {
             Rvalue::BinaryOp(op, ref left, ref right) => {
                 trace!("rvalue binop {:?} for {:?} and {:?}", op, left, right);
                 let right = self.eval_operand(right, source_info)?;
-                let def_id = if self.tcx.is_closure(self.source.def_id) {
-                    self.tcx.closure_base_def_id(self.source.def_id)
+                let def_id = if self.tcx.is_closure(self.source.def_id()) {
+                    self.tcx.closure_base_def_id(self.source.def_id())
                 } else {
-                    self.source.def_id
+                    self.source.def_id()
                 };
                 let generics = self.tcx.generics_of(def_id);
                 if generics.requires_monomorphization(self.tcx) {
@@ -608,7 +608,7 @@ impl<'b, 'a, 'tcx> Visitor<'tcx> for ConstPropagator<'b, 'a, 'tcx> {
                     let node_id = self
                         .tcx
                         .hir()
-                        .as_local_node_id(self.source.def_id)
+                        .as_local_node_id(self.source.def_id())
                         .expect("some part of a failing const eval must be local");
                     use rustc::mir::interpret::EvalErrorKind::*;
                     let msg = match msg {

src/librustc_mir/transform/elaborate_drops.rs

@@ -28,8 +28,8 @@ impl MirPass for ElaborateDrops {
     {
         debug!("elaborate_drops({:?} @ {:?})", src, mir.span);
 
-        let id = tcx.hir().as_local_node_id(src.def_id).unwrap();
-        let param_env = tcx.param_env(src.def_id).with_reveal_all();
+        let id = tcx.hir().as_local_node_id(src.def_id()).unwrap();
+        let param_env = tcx.param_env(src.def_id()).with_reveal_all();
         let move_data = match MoveData::gather_moves(mir, tcx) {
             Ok(move_data) => move_data,
             Err((move_data, _move_errors)) => {

src/librustc_mir/transform/generator.rs

@@ -383,7 +383,7 @@ fn locals_live_across_suspend_points(
     FxHashMap<BasicBlock, liveness::LiveVarSet<Local>>,
 ) {
     let dead_unwinds = BitSet::new_empty(mir.basic_blocks().len());
-    let node_id = tcx.hir().as_local_node_id(source.def_id).unwrap();
+    let node_id = tcx.hir().as_local_node_id(source.def_id()).unwrap();
 
     // Calculate when MIR locals have live storage. This gives us an upper bound of their
     // lifetimes.
@@ -880,7 +880,7 @@ impl MirPass for StateTransform {
 
         assert!(mir.generator_drop.is_none());
 
-        let def_id = source.def_id;
+        let def_id = source.def_id();
 
         // The first argument is the generator type passed by value
         let gen_ty = mir.local_decls.raw[1].ty;

src/librustc_mir/transform/inline.rs

@@ -40,7 +40,7 @@ struct CallSite<'tcx> {
 impl MirPass for Inline {
     fn run_pass<'a, 'tcx>(&self,
                           tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                          source: MirSource,
+                          source: MirSource<'tcx>,
                           mir: &mut Mir<'tcx>) {
         if tcx.sess.opts.debugging_opts.mir_opt_level >= 2 {
             Inliner { tcx, source }.run_pass(mir);
@@ -50,7 +50,7 @@ impl MirPass for Inline {
 
 struct Inliner<'a, 'tcx: 'a> {
     tcx: TyCtxt<'a, 'tcx, 'tcx>,
-    source: MirSource,
+    source: MirSource<'tcx>,
 }
 
 impl<'a, 'tcx> Inliner<'a, 'tcx> {
@@ -69,10 +69,10 @@ impl<'a, 'tcx> Inliner<'a, 'tcx> {
 
         let mut callsites = VecDeque::new();
 
-        let param_env = self.tcx.param_env(self.source.def_id);
+        let param_env = self.tcx.param_env(self.source.def_id());
 
         // Only do inlining into fn bodies.
-        let id = self.tcx.hir().as_local_node_id(self.source.def_id).unwrap();
+        let id = self.tcx.hir().as_local_node_id(self.source.def_id()).unwrap();
         if self.tcx.hir().body_owner_kind(id).is_fn_or_closure() && self.source.promoted.is_none() {
             for (bb, bb_data) in caller_mir.basic_blocks().iter_enumerated() {
                 if let Some(callsite) = self.get_valid_function_call(bb,
@@ -274,7 +274,7 @@ impl<'a, 'tcx> Inliner<'a, 'tcx> {
 
         // FIXME: Give a bonus to functions with only a single caller
 
-        let param_env = tcx.param_env(self.source.def_id);
+        let param_env = tcx.param_env(self.source.def_id());
 
         let mut first_block = true;
         let mut cost = 0;

src/librustc_mir/transform/mod.rs

@@ -2,7 +2,7 @@ use crate::borrow_check::nll::type_check;
 use crate::build;
 use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
 use rustc::mir::{Mir, MirPhase, Promoted};
-use rustc::ty::TyCtxt;
+use rustc::ty::{TyCtxt, InstanceDef};
 use rustc::ty::query::Providers;
 use rustc::ty::steal::Steal;
 use rustc::hir;
@@ -104,20 +104,25 @@ fn mir_built<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx Stea
 
 /// Where a specific Mir comes from.
 #[derive(Debug, Copy, Clone)]
-pub struct MirSource {
-    pub def_id: DefId,
+pub struct MirSource<'tcx> {
+    pub instance: InstanceDef<'tcx>,
 
     /// If `Some`, this is a promoted rvalue within the parent function.
     pub promoted: Option<Promoted>,
 }
 
-impl MirSource {
+impl<'tcx> MirSource<'tcx> {
     pub fn item(def_id: DefId) -> Self {
         MirSource {
-            def_id,
+            instance: InstanceDef::Item(def_id),
             promoted: None
         }
     }
+
+    #[inline]
+    pub fn def_id(&self) -> DefId {
+        self.instance.def_id()
+    }
 }
 
 /// Generates a default name for the pass based on the name of the
@@ -141,14 +146,14 @@ pub trait MirPass {
 
     fn run_pass<'a, 'tcx>(&self,
                           tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                          source: MirSource,
+                          source: MirSource<'tcx>,
                           mir: &mut Mir<'tcx>);
 }
 
 pub fn run_passes(
     tcx: TyCtxt<'a, 'tcx, 'tcx>,
     mir: &mut Mir<'tcx>,
-    def_id: DefId,
+    instance: InstanceDef<'tcx>,
     mir_phase: MirPhase,
     passes: &[&dyn MirPass],
 ) {
@@ -160,7 +165,7 @@ pub fn run_passes(
         }
 
         let source = MirSource {
-            def_id,
+            instance,
             promoted,
         };
         let mut index = 0;
@@ -198,7 +203,7 @@ fn mir_const<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx Stea
     let _ = tcx.unsafety_check_result(def_id);
 
     let mut mir = tcx.mir_built(def_id).steal();
-    run_passes(tcx, &mut mir, def_id, MirPhase::Const, &[
+    run_passes(tcx, &mut mir, InstanceDef::Item(def_id), MirPhase::Const, &[
         // What we need to do constant evaluation.
         &simplify::SimplifyCfg::new("initial"),
         &type_check::TypeckMir,
@@ -217,7 +222,7 @@ fn mir_validated<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx
     }
 
     let mut mir = tcx.mir_const(def_id).steal();
-    run_passes(tcx, &mut mir, def_id, MirPhase::Validated, &[
+    run_passes(tcx, &mut mir, InstanceDef::Item(def_id), MirPhase::Validated, &[
         // What we need to run borrowck etc.
         &qualify_consts::QualifyAndPromoteConstants,
         &simplify::SimplifyCfg::new("qualify-consts"),
@@ -235,7 +240,7 @@ fn optimized_mir<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx
     }
 
     let mut mir = tcx.mir_validated(def_id).steal();
-    run_passes(tcx, &mut mir, def_id, MirPhase::Optimized, &[
+    run_passes(tcx, &mut mir, InstanceDef::Item(def_id), MirPhase::Optimized, &[
         // Remove all things not needed by analysis
         &no_landing_pads::NoLandingPads,
         &simplify_branches::SimplifyBranches::new("initial"),

src/librustc_mir/transform/qualify_consts.rs

@@ -1171,7 +1171,7 @@ impl MirPass for QualifyAndPromoteConstants {
             return;
         }
 
-        let def_id = src.def_id;
+        let def_id = src.def_id();
         let id = tcx.hir().as_local_node_id(def_id).unwrap();
         let mut const_promoted_temps = None;
         let mode = match tcx.hir().body_owner_kind(id) {

src/librustc_mir/transform/rustc_peek.rs

@@ -25,7 +25,7 @@ pub struct SanityCheck;
 impl MirPass for SanityCheck {
     fn run_pass<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
                           src: MirSource, mir: &mut Mir<'tcx>) {
-        let def_id = src.def_id;
+        let def_id = src.def_id();
         let id = tcx.hir().as_local_node_id(def_id).unwrap();
         if !tcx.has_attr(def_id, "rustc_mir") {
             debug!("skipping rustc_peek::SanityCheck on {}", tcx.item_path_str(def_id));

src/librustc_mir/util/liveness.rs

@@ -317,7 +317,7 @@ pub fn dump_mir<'a, 'tcx, V: Idx>(
     }
     let node_path = item_path::with_forced_impl_filename_line(|| {
         // see notes on #41697 below
-        tcx.item_path_str(source.def_id)
+        tcx.item_path_str(source.def_id())
     });
     dump_matched_mir_node(tcx, pass_name, &node_path, source, mir, map, result);
 }
@@ -333,7 +333,7 @@ fn dump_matched_mir_node<'a, 'tcx, V: Idx>(
 ) {
     let mut file_path = PathBuf::new();
     file_path.push(Path::new(&tcx.sess.opts.debugging_opts.dump_mir_dir));
-    let item_id = tcx.hir().as_local_node_id(source.def_id).unwrap();
+    let item_id = tcx.hir().as_local_node_id(source.def_id()).unwrap();
     let file_name = format!("rustc.node{}{}-liveness.mir", item_id, pass_name);
     file_path.push(&file_name);
     let _ = fs::File::create(&file_path).and_then(|mut file| {