Rollup merge of rust-lang#66457 - cjgillot:just_hashstable, r=Zoxc

Just derive Hashstable in librustc

Split out of rust-lang#66279

r? @Zoxc

Author: Centril

Cargo.lock

@@ -3719,6 +3719,7 @@ dependencies = [
  "rustc_errors",
  "rustc_index",
  "rustc_lexer",
+ "rustc_macros",
  "rustc_target",
  "serialize",
  "smallvec 1.0.0",

src/librustc/dep_graph/dep_node.rs

@@ -578,7 +578,7 @@ impl<'tcx> DepNodeParams<'tcx> for HirId {
 /// the need to be mapped or unmapped. (This ensures we can serialize
 /// them even in the absence of a tcx.)
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash,
-         RustcEncodable, RustcDecodable)]
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct WorkProductId {
     hash: Fingerprint
 }
@@ -599,7 +599,3 @@ impl WorkProductId {
         }
     }
 }
-
-impl_stable_hash_for!(struct crate::dep_graph::WorkProductId {
-    hash
-});

src/librustc/hir/map/definitions.rs

@@ -313,11 +313,9 @@ pub enum DefPathData {
 }
 
 #[derive(Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord, Debug,
-         RustcEncodable, RustcDecodable)]
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct DefPathHash(pub Fingerprint);
 
-impl_stable_hash_for!(tuple_struct DefPathHash { fingerprint });
-
 impl Borrow<Fingerprint> for DefPathHash {
     #[inline]
     fn borrow(&self) -> &Fingerprint {

src/librustc/hir/mod.rs

@@ -1215,7 +1215,7 @@ impl UnOp {
 }
 
 /// A statement.
-#[derive(RustcEncodable, RustcDecodable)]
+#[derive(RustcEncodable, RustcDecodable, HashStable)]
 pub struct Stmt {
     pub hir_id: HirId,
     pub kind: StmtKind,

src/librustc/ich/impls_hir.rs

@@ -140,13 +140,6 @@ impl<'a> HashStable<StableHashingContext<'a>> for hir::Ty {
 
 impl_stable_hash_for_spanned!(hir::BinOpKind);
 
-impl_stable_hash_for!(struct hir::Stmt {
-    hir_id,
-    kind,
-    span,
-});
-
-
 impl_stable_hash_for_spanned!(ast::Name);
 
 impl<'a> HashStable<StableHashingContext<'a>> for hir::Expr {

src/librustc/infer/outlives/free_region_map.rs

@@ -1,7 +1,7 @@
 use crate::ty::{self, Lift, TyCtxt, Region};
 use rustc_data_structures::transitive_relation::TransitiveRelation;
 
-#[derive(Clone, RustcEncodable, RustcDecodable, Debug, Default)]
+#[derive(Clone, RustcEncodable, RustcDecodable, Debug, Default, HashStable)]
 pub struct FreeRegionMap<'tcx> {
     // Stores the relation `a < b`, where `a` and `b` are regions.
     //
@@ -89,10 +89,6 @@ fn is_free_or_static(r: Region<'_>) -> bool {
     }
 }
 
-impl_stable_hash_for!(struct FreeRegionMap<'tcx> {
-    relation
-});
-
 impl<'a, 'tcx> Lift<'tcx> for FreeRegionMap<'a> {
     type Lifted = FreeRegionMap<'tcx>;
     fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<FreeRegionMap<'tcx>> {

src/librustc/lint/mod.rs

@@ -543,18 +543,11 @@ impl LintId {
 }
 
 /// Setting for how to handle a lint.
-#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
+#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash, HashStable)]
 pub enum Level {
     Allow, Warn, Deny, Forbid,
 }
 
-impl_stable_hash_for!(enum self::Level {
-    Allow,
-    Warn,
-    Deny,
-    Forbid
-});
-
 impl Level {
     /// Converts a level to a lower-case string.
     pub fn as_str(self) -> &'static str {
@@ -590,7 +583,7 @@ impl Level {
 }
 
 /// How a lint level was set.
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy, PartialEq, Eq, HashStable)]
 pub enum LintSource {
     /// Lint is at the default level as declared
     /// in rustc or a plugin.
@@ -603,12 +596,6 @@ pub enum LintSource {
     CommandLine(Symbol),
 }
 
-impl_stable_hash_for!(enum self::LintSource {
-    Default,
-    Node(name, span, reason),
-    CommandLine(text)
-});
-
 pub type LevelSource = (Level, LintSource);
 
 pub mod builtin;

src/librustc/middle/exported_symbols.rs

@@ -11,17 +11,12 @@ use crate::ty::subst::SubstsRef;
 /// kind of crate, including cdylibs which export very few things.
 /// `Rust` will only be exported if the crate produced is a Rust
 /// dylib.
-#[derive(Eq, PartialEq, Debug, Copy, Clone, RustcEncodable, RustcDecodable)]
+#[derive(Eq, PartialEq, Debug, Copy, Clone, RustcEncodable, RustcDecodable, HashStable)]
 pub enum SymbolExportLevel {
     C,
     Rust,
 }
 
-impl_stable_hash_for!(enum self::SymbolExportLevel {
-    C,
-    Rust
-});
-
 impl SymbolExportLevel {
     pub fn is_below_threshold(self, threshold: SymbolExportLevel) -> bool {
         threshold == SymbolExportLevel::Rust // export everything from Rust dylibs

src/librustc/middle/resolve_lifetime.rs

@@ -207,20 +207,14 @@ struct NamedRegionMap {
 }
 
 /// See [`NamedRegionMap`].
-#[derive(Default)]
+#[derive(Default, HashStable)]
 pub struct ResolveLifetimes {
     defs: FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Region>>,
     late_bound: FxHashMap<LocalDefId, FxHashSet<ItemLocalId>>,
     object_lifetime_defaults:
         FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>>,
 }
 
-impl_stable_hash_for!(struct crate::middle::resolve_lifetime::ResolveLifetimes {
-    defs,
-    late_bound,
-    object_lifetime_defaults
-});
-
 struct LifetimeContext<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,
     map: &'a mut NamedRegionMap,

src/librustc/middle/stability.rs

@@ -52,7 +52,7 @@ enum AnnotationKind {
 }
 
 /// An entry in the `depr_map`.
-#[derive(Clone)]
+#[derive(Clone, HashStable)]
 pub struct DeprecationEntry {
     /// The metadata of the attribute associated with this entry.
     pub attr: Deprecation,
@@ -61,11 +61,6 @@ pub struct DeprecationEntry {
     origin: Option<HirId>,
 }
 
-impl_stable_hash_for!(struct self::DeprecationEntry {
-    attr,
-    origin
-});
-
 impl DeprecationEntry {
     fn local(attr: Deprecation, id: HirId) -> DeprecationEntry {
         DeprecationEntry {
@@ -90,6 +85,7 @@ impl DeprecationEntry {
 }
 
 /// A stability index, giving the stability level for items and methods.
+#[derive(HashStable)]
 pub struct Index<'tcx> {
     /// This is mostly a cache, except the stabilities of local items
     /// are filled by the annotator.
@@ -103,13 +99,6 @@ pub struct Index<'tcx> {
     active_features: FxHashSet<Symbol>,
 }
 
-impl_stable_hash_for!(struct self::Index<'tcx> {
-    stab_map,
-    depr_map,
-    staged_api,
-    active_features
-});
-
 // A private tree-walker for producing an Index.
 struct Annotator<'a, 'tcx> {
     tcx: TyCtxt<'tcx>,

src/librustc/mir/interpret/allocation.rs

@@ -4,7 +4,6 @@ use super::{
     Pointer, InterpResult, AllocId, ScalarMaybeUndef, write_target_uint, read_target_uint, Scalar,
 };
 
-use crate::mir;
 use crate::ty::layout::{Size, Align};
 
 use rustc_data_structures::sorted_map::SortedMap;
@@ -787,14 +786,13 @@ type Block = u64;
 
 /// A bitmask where each bit refers to the byte with the same index. If the bit is `true`, the byte
 /// is defined. If it is `false` the byte is undefined.
-#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash,
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct UndefMask {
     blocks: Vec<Block>,
     len: Size,
 }
 
-impl_stable_hash_for!(struct mir::interpret::UndefMask{blocks, len});
-
 impl UndefMask {
     pub const BLOCK_SIZE: u64 = 64;
 

src/librustc/mir/interpret/value.rs

@@ -458,7 +458,7 @@ impl<Tag> From<Pointer<Tag>> for Scalar<Tag> {
     }
 }
 
-#[derive(Clone, Copy, Eq, PartialEq, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Copy, Eq, PartialEq, RustcEncodable, RustcDecodable, HashStable)]
 pub enum ScalarMaybeUndef<Tag = (), Id = AllocId> {
     Scalar(Scalar<Tag, Id>),
     Undef,
@@ -583,11 +583,6 @@ impl<'tcx, Tag> ScalarMaybeUndef<Tag> {
     }
 }
 
-impl_stable_hash_for!(enum crate::mir::interpret::ScalarMaybeUndef {
-    Scalar(v),
-    Undef
-});
-
 /// Gets the bytes of a constant slice value.
 pub fn get_slice_bytes<'tcx>(cx: &impl HasDataLayout, val: ConstValue<'tcx>) -> &'tcx [u8] {
     if let ConstValue::Slice { data, start, end } = val {

src/librustc/mir/mod.rs

@@ -70,7 +70,8 @@ impl<'tcx> HasLocalDecls<'tcx> for Body<'tcx> {
 /// The various "big phases" that MIR goes through.
 ///
 /// Warning: ordering of variants is significant.
-#[derive(Copy, Clone, RustcEncodable, RustcDecodable, Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Copy, Clone, RustcEncodable, RustcDecodable, HashStable,
+         Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub enum MirPhase {
     Build = 0,
     Const = 1,
@@ -86,7 +87,7 @@ impl MirPhase {
 }
 
 /// The lowered representation of a single function.
-#[derive(Clone, RustcEncodable, RustcDecodable, Debug, TypeFoldable)]
+#[derive(Clone, RustcEncodable, RustcDecodable, Debug, HashStable, TypeFoldable)]
 pub struct Body<'tcx> {
     /// A list of basic blocks. References to basic block use a newtyped index type `BasicBlock`
     /// that indexes into this vector.
@@ -412,24 +413,6 @@ pub enum Safety {
     ExplicitUnsafe(hir::HirId),
 }
 
-impl_stable_hash_for!(struct Body<'tcx> {
-    phase,
-    basic_blocks,
-    source_scopes,
-    source_scope_local_data,
-    yield_ty,
-    generator_drop,
-    generator_layout,
-    local_decls,
-    user_type_annotations,
-    arg_count,
-    __upvar_debuginfo_codegen_only_do_not_use,
-    spread_arg,
-    control_flow_destroyed,
-    span,
-    cache
-});
-
 impl<'tcx> Index<BasicBlock> for Body<'tcx> {
     type Output = BasicBlockData<'tcx>;
 
@@ -609,7 +592,7 @@ pub enum LocalKind {
     ReturnPointer,
 }
 
-#[derive(Clone, Debug, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Debug, RustcEncodable, RustcDecodable, HashStable)]
 pub struct VarBindingForm<'tcx> {
     /// Is variable bound via `x`, `mut x`, `ref x`, or `ref mut x`?
     pub binding_mode: ty::BindingMode,
@@ -642,7 +625,7 @@ pub enum BindingForm<'tcx> {
 }
 
 /// Represents what type of implicit self a function has, if any.
-#[derive(Clone, Copy, PartialEq, Debug, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Copy, PartialEq, Debug, RustcEncodable, RustcDecodable, HashStable)]
 pub enum ImplicitSelfKind {
     /// Represents a `fn x(self);`.
     Imm,
@@ -659,28 +642,6 @@ pub enum ImplicitSelfKind {
 
 CloneTypeFoldableAndLiftImpls! { BindingForm<'tcx>, }
 
-impl_stable_hash_for!(struct self::VarBindingForm<'tcx> {
-    binding_mode,
-    opt_ty_info,
-    opt_match_place,
-    pat_span
-});
-
-impl_stable_hash_for!(enum self::ImplicitSelfKind {
-    Imm,
-    Mut,
-    ImmRef,
-    MutRef,
-    None
-});
-
-impl_stable_hash_for!(enum self::MirPhase {
-    Build,
-    Const,
-    Validated,
-    Optimized,
-});
-
 mod binding_form_impl {
     use crate::ich::StableHashingContext;
     use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
@@ -707,7 +668,7 @@ mod binding_form_impl {
 /// involved in borrow_check errors, e.g., explanations of where the
 /// temporaries come from, when their destructors are run, and/or how
 /// one might revise the code to satisfy the borrow checker's rules.
-#[derive(Clone, Debug, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Debug, RustcEncodable, RustcDecodable, HashStable)]
 pub struct BlockTailInfo {
     /// If `true`, then the value resulting from evaluating this tail
     /// expression is ignored by the block's expression context.
@@ -717,8 +678,6 @@ pub struct BlockTailInfo {
     pub tail_result_is_ignored: bool,
 }
 
-impl_stable_hash_for!(struct BlockTailInfo { tail_result_is_ignored });
-
 /// A MIR local.
 ///
 /// This can be a binding declared by the user, a temporary inserted by the compiler, a function
@@ -1746,7 +1705,8 @@ pub enum PlaceBase<'tcx> {
 }
 
 /// We store the normalized type to avoid requiring normalization when reading MIR
-#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash,
+         RustcEncodable, RustcDecodable, HashStable)]
 pub struct Static<'tcx> {
     pub ty: Ty<'tcx>,
     pub kind: StaticKind<'tcx>,
@@ -1768,12 +1728,6 @@ pub enum StaticKind<'tcx> {
     Static,
 }
 
-impl_stable_hash_for!(struct Static<'tcx> {
-    ty,
-    kind,
-    def_id
-});
-
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[derive(RustcEncodable, RustcDecodable, HashStable)]
 pub enum ProjectionElem<V, T> {