incr.comp.: Compute hashes of all query results.

Author: michaelwoerister

src/librustc/ich/hcx.rs

@@ -13,9 +13,10 @@ use hir::def_id::DefId;
 use hir::map::DefPathHash;
 use ich::{self, CachingCodemapView};
 use session::config::DebugInfoLevel::NoDebugInfo;
-use ty::TyCtxt;
-use util::nodemap::{NodeMap, ItemLocalMap};
+use ty::{self, TyCtxt, fast_reject};
+use util::nodemap::{NodeMap, NodeSet, ItemLocalMap};
 
+use std::cmp::Ord;
 use std::hash as std_hash;
 use std::collections::{HashMap, HashSet, BTreeMap};
 
@@ -47,6 +48,7 @@ pub struct StableHashingContext<'a, 'gcx: 'a+'tcx, 'tcx: 'a> {
 #[derive(PartialEq, Eq, Clone, Copy)]
 pub enum NodeIdHashingMode {
     Ignore,
+    CheckedIgnore,
     HashDefPath,
     HashTraitsInScope,
 }
@@ -148,7 +150,7 @@ impl<'a, 'gcx, 'tcx> StableHashingContext<'a, 'gcx, 'tcx> {
             self.overflow_checks_enabled = true;
         }
         let prev_hash_node_ids = self.node_id_hashing_mode;
-        self.node_id_hashing_mode = NodeIdHashingMode::Ignore;
+        self.node_id_hashing_mode = NodeIdHashingMode::CheckedIgnore;
 
         f(self);
 
@@ -202,6 +204,9 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for ast::N
         let hir_id = hcx.tcx.hir.node_to_hir_id(*self);
         match hcx.node_id_hashing_mode {
             NodeIdHashingMode::Ignore => {
+                // Don't do anything.
+            }
+            NodeIdHashingMode::CheckedIgnore => {
                 // Most NodeIds in the HIR can be ignored, but if there is a
                 // corresponding entry in the `trait_map` we need to hash that.
                 // Make sure we don't ignore too much by checking that there is
@@ -321,7 +326,7 @@ pub fn hash_stable_hashmap<'a, 'gcx, 'tcx, K, V, R, SK, F, W>(
     let mut keys: Vec<_> = map.keys()
                               .map(|k| (extract_stable_key(hcx, k), k))
                               .collect();
-    keys.sort_unstable_by_key(|&(ref stable_key, _)| stable_key.clone());
+    keys.sort_unstable_by(|&(ref sk1, _), &(ref sk2, _)| sk1.cmp(sk2));
     keys.len().hash_stable(hcx, hasher);
     for (stable_key, key) in keys {
         stable_key.hash_stable(hcx, hasher);
@@ -354,8 +359,25 @@ pub fn hash_stable_nodemap<'a, 'tcx, 'gcx, V, W>(
     where V: HashStable<StableHashingContext<'a, 'gcx, 'tcx>>,
           W: StableHasherResult,
 {
-    hash_stable_hashmap(hcx, hasher, map, |hcx, node_id| {
-        hcx.tcx.hir.definitions().node_to_hir_id(*node_id).local_id
+    let definitions = hcx.tcx.hir.definitions();
+    hash_stable_hashmap(hcx, hasher, map, |_, node_id| {
+        let hir_id = definitions.node_to_hir_id(*node_id);
+        let owner_def_path_hash = definitions.def_path_hash(hir_id.owner);
+        (owner_def_path_hash, hir_id.local_id)
+    });
+}
+
+pub fn hash_stable_nodeset<'a, 'tcx, 'gcx, W>(
+    hcx: &mut StableHashingContext<'a, 'gcx, 'tcx>,
+    hasher: &mut StableHasher<W>,
+    map: &NodeSet)
+    where W: StableHasherResult,
+{
+    let definitions = hcx.tcx.hir.definitions();
+    hash_stable_hashset(hcx, hasher, map, |_, node_id| {
+        let hir_id = definitions.node_to_hir_id(*node_id);
+        let owner_def_path_hash = definitions.def_path_hash(hir_id.owner);
+        (owner_def_path_hash, hir_id.local_id)
     });
 }
 
@@ -386,10 +408,56 @@ pub fn hash_stable_btreemap<'a, 'tcx, 'gcx, K, V, SK, F, W>(
     let mut keys: Vec<_> = map.keys()
                               .map(|k| (extract_stable_key(hcx, k), k))
                               .collect();
-    keys.sort_unstable_by_key(|&(ref stable_key, _)| stable_key.clone());
+    keys.sort_unstable_by(|&(ref sk1, _), &(ref sk2, _)| sk1.cmp(sk2));
     keys.len().hash_stable(hcx, hasher);
     for (stable_key, key) in keys {
         stable_key.hash_stable(hcx, hasher);
         map[key].hash_stable(hcx, hasher);
     }
 }
+
+pub fn hash_stable_trait_impls<'a, 'tcx, 'gcx, W, R>(
+    hcx: &mut StableHashingContext<'a, 'gcx, 'tcx>,
+    hasher: &mut StableHasher<W>,
+    blanket_impls: &Vec<DefId>,
+    non_blanket_impls: &HashMap<fast_reject::SimplifiedType, Vec<DefId>, R>)
+    where W: StableHasherResult,
+          R: std_hash::BuildHasher,
+{
+    {
+        let mut blanket_impls: AccumulateVec<[_; 8]> = blanket_impls
+            .iter()
+            .map(|&def_id| hcx.def_path_hash(def_id))
+            .collect();
+
+        if blanket_impls.len() > 1 {
+            blanket_impls.sort_unstable();
+        }
+
+        blanket_impls.hash_stable(hcx, hasher);
+    }
+
+    {
+        let tcx = hcx.tcx();
+        let mut keys: AccumulateVec<[_; 8]> =
+            non_blanket_impls.keys()
+                             .map(|k| (k, k.map_def(|d| tcx.def_path_hash(d))))
+                             .collect();
+        keys.sort_unstable_by(|&(_, ref k1), &(_, ref k2)| k1.cmp(k2));
+        keys.len().hash_stable(hcx, hasher);
+        for (key, ref stable_key) in keys {
+            stable_key.hash_stable(hcx, hasher);
+            let mut impls : AccumulateVec<[_; 8]> = non_blanket_impls[key]
+                .iter()
+                .map(|&impl_id| hcx.def_path_hash(impl_id))
+                .collect();
+
+            if impls.len() > 1 {
+                impls.sort_unstable();
+            }
+
+            impls.hash_stable(hcx, hasher);
+        }
+    }
+}
+

src/librustc/ich/impls_cstore.rs

@@ -38,3 +38,10 @@ impl_stable_hash_for!(enum middle::cstore::LinkagePreference {
     RequireDynamic,
     RequireStatic
 });
+
+impl_stable_hash_for!(struct middle::cstore::ExternCrate {
+    def_id,
+    span,
+    direct,
+    path_len
+});

src/librustc/ich/impls_hir.rs

@@ -13,13 +13,12 @@
 
 use hir;
 use hir::def_id::{DefId, CrateNum, CRATE_DEF_INDEX};
-use ich::{StableHashingContext, NodeIdHashingMode};
-use std::mem;
-
-use syntax::ast;
-
+use ich::{self, StableHashingContext, NodeIdHashingMode};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher,
                                            StableHasherResult};
+use std::mem;
+use syntax::ast;
+use util::nodemap::DefIdSet;
 
 impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for DefId {
     #[inline]
@@ -30,6 +29,16 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for DefId
     }
 }
 
+impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for DefIdSet
+{
+    fn hash_stable<W: StableHasherResult>(&self,
+                                          hcx: &mut StableHashingContext<'a, 'gcx, 'tcx>,
+                                          hasher: &mut StableHasher<W>) {
+        ich::hash_stable_hashset(hcx, hasher, self, |hcx, def_id| {
+            hcx.def_path_hash(*def_id)
+        });
+    }
+}
 
 impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::HirId {
     #[inline]
@@ -235,7 +244,7 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::T
             hir::TyTypeof(..)      |
             hir::TyErr             |
             hir::TyInfer           => {
-                NodeIdHashingMode::Ignore
+                NodeIdHashingMode::CheckedIgnore
             }
             hir::TyPath(..) => {
                 NodeIdHashingMode::HashTraitsInScope
@@ -403,7 +412,7 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::P
             hir::PatKind::Lit(..)     |
             hir::PatKind::Range(..)   |
             hir::PatKind::Slice(..)   => {
-                NodeIdHashingMode::Ignore
+                NodeIdHashingMode::CheckedIgnore
             }
             hir::PatKind::Path(..)        |
             hir::PatKind::Struct(..)      |
@@ -574,21 +583,21 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::E
                 hir::ExprRepeat(..)     |
                 hir::ExprTup(..)        => {
                     // For these we only hash the span when debuginfo is on.
-                    (false, NodeIdHashingMode::Ignore)
+                    (false, NodeIdHashingMode::CheckedIgnore)
                 }
                 // For the following, spans might be significant because of
                 // panic messages indicating the source location.
                 hir::ExprBinary(op, ..) => {
-                    (hcx.binop_can_panic_at_runtime(op.node), NodeIdHashingMode::Ignore)
+                    (hcx.binop_can_panic_at_runtime(op.node), NodeIdHashingMode::CheckedIgnore)
                 }
                 hir::ExprUnary(op, _) => {
-                    (hcx.unop_can_panic_at_runtime(op), NodeIdHashingMode::Ignore)
+                    (hcx.unop_can_panic_at_runtime(op), NodeIdHashingMode::CheckedIgnore)
                 }
                 hir::ExprAssignOp(op, ..) => {
-                    (hcx.binop_can_panic_at_runtime(op.node), NodeIdHashingMode::Ignore)
+                    (hcx.binop_can_panic_at_runtime(op.node), NodeIdHashingMode::CheckedIgnore)
                 }
                 hir::ExprIndex(..) => {
-                    (true, NodeIdHashingMode::Ignore)
+                    (true, NodeIdHashingMode::CheckedIgnore)
                 }
                 // For these we don't care about the span, but want to hash the
                 // trait in scope
@@ -899,7 +908,7 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::I
             hir::ItemStatic(..)      |
             hir::ItemConst(..)       |
             hir::ItemFn(..)          => {
-                (NodeIdHashingMode::Ignore, hcx.hash_spans())
+                (NodeIdHashingMode::CheckedIgnore, hcx.hash_spans())
             }
             hir::ItemUse(..) => {
                 (NodeIdHashingMode::HashTraitsInScope, false)
@@ -916,7 +925,7 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for hir::I
             hir::ItemEnum(..)        |
             hir::ItemStruct(..)      |
             hir::ItemUnion(..)       => {
-                (NodeIdHashingMode::Ignore, false)
+                (NodeIdHashingMode::CheckedIgnore, false)
             }
         };
 
@@ -1160,3 +1169,20 @@ for ::middle::lang_items::LangItem {
         ::std::hash::Hash::hash(self, hasher);
     }
 }
+
+impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>>
+for hir::TraitCandidate {
+    fn hash_stable<W: StableHasherResult>(&self,
+                                          hcx: &mut StableHashingContext<'a, 'gcx, 'tcx>,
+                                          hasher: &mut StableHasher<W>) {
+        hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
+            let hir::TraitCandidate {
+                def_id,
+                import_id,
+            } = *self;
+
+            def_id.hash_stable(hcx, hasher);
+            import_id.hash_stable(hcx, hasher);
+        });
+    }
+}