Rollup merge of #109280 - compiler-errors:no-vec-map, r=Mark-Simulacrum

Remove `VecMap`

Not sure what the use of this data structure is over just using `FxIndexMap` or a `Vec`.

r? ```@ghost```

compiler/rustc_borrowck/src/lib.rs

@@ -19,7 +19,6 @@ extern crate tracing;
 
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
 use rustc_data_structures::graph::dominators::Dominators;
-use rustc_data_structures::vec_map::VecMap;
 use rustc_errors::{Diagnostic, DiagnosticBuilder, DiagnosticMessage, SubdiagnosticMessage};
 use rustc_hir as hir;
 use rustc_hir::def_id::LocalDefId;
@@ -141,7 +140,7 @@ fn mir_borrowck(tcx: TyCtxt<'_>, def: ty::WithOptConstParam<LocalDefId>) -> &Bor
         debug!("Skipping borrowck because of injected body");
         // Let's make up a borrowck result! Fun times!
         let result = BorrowCheckResult {
-            concrete_opaque_types: VecMap::new(),
+            concrete_opaque_types: FxIndexMap::default(),
             closure_requirements: None,
             used_mut_upvars: SmallVec::new(),
             tainted_by_errors: None,

compiler/rustc_borrowck/src/nll.rs

@@ -2,7 +2,7 @@
 #![deny(rustc::diagnostic_outside_of_impl)]
 //! The entry point of the NLL borrow checker.
 
-use rustc_data_structures::vec_map::VecMap;
+use rustc_data_structures::fx::FxIndexMap;
 use rustc_hir::def_id::LocalDefId;
 use rustc_index::vec::IndexVec;
 use rustc_middle::mir::{create_dump_file, dump_enabled, dump_mir, PassWhere};
@@ -44,7 +44,7 @@ pub type PoloniusOutput = Output<RustcFacts>;
 /// closure requirements to propagate, and any generated errors.
 pub(crate) struct NllOutput<'tcx> {
     pub regioncx: RegionInferenceContext<'tcx>,
-    pub opaque_type_values: VecMap<LocalDefId, OpaqueHiddenType<'tcx>>,
+    pub opaque_type_values: FxIndexMap<LocalDefId, OpaqueHiddenType<'tcx>>,
     pub polonius_input: Option<Box<AllFacts>>,
     pub polonius_output: Option<Rc<PoloniusOutput>>,
     pub opt_closure_req: Option<ClosureRegionRequirements<'tcx>>,
@@ -377,7 +377,7 @@ pub(super) fn dump_annotation<'tcx>(
     body: &Body<'tcx>,
     regioncx: &RegionInferenceContext<'tcx>,
     closure_region_requirements: &Option<ClosureRegionRequirements<'tcx>>,
-    opaque_type_values: &VecMap<LocalDefId, OpaqueHiddenType<'tcx>>,
+    opaque_type_values: &FxIndexMap<LocalDefId, OpaqueHiddenType<'tcx>>,
     errors: &mut crate::error::BorrowckErrors<'tcx>,
 ) {
     let tcx = infcx.tcx;

compiler/rustc_borrowck/src/region_infer/opaque_types.rs

@@ -1,5 +1,4 @@
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
-use rustc_data_structures::vec_map::VecMap;
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::OpaqueTyOrigin;
@@ -61,9 +60,9 @@ impl<'tcx> RegionInferenceContext<'tcx> {
     pub(crate) fn infer_opaque_types(
         &self,
         infcx: &InferCtxt<'tcx>,
-        opaque_ty_decls: VecMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
-    ) -> VecMap<LocalDefId, OpaqueHiddenType<'tcx>> {
-        let mut result: VecMap<LocalDefId, OpaqueHiddenType<'tcx>> = VecMap::new();
+        opaque_ty_decls: FxIndexMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
+    ) -> FxIndexMap<LocalDefId, OpaqueHiddenType<'tcx>> {
+        let mut result: FxIndexMap<LocalDefId, OpaqueHiddenType<'tcx>> = FxIndexMap::default();
 
         let member_constraints: FxIndexMap<_, _> = self
             .member_constraints

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -10,7 +10,6 @@ use either::Either;
 use hir::OpaqueTyOrigin;
 use rustc_data_structures::frozen::Frozen;
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
-use rustc_data_structures::vec_map::VecMap;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::LocalDefId;
@@ -894,7 +893,7 @@ pub(crate) struct MirTypeckResults<'tcx> {
     pub(crate) constraints: MirTypeckRegionConstraints<'tcx>,
     pub(crate) universal_region_relations: Frozen<UniversalRegionRelations<'tcx>>,
     pub(crate) opaque_type_values:
-        VecMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
+        FxIndexMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
 }
 
 /// A collection of region constraints that must be satisfied for the