From 8f3e96d6589fad610107fa05ba80fc708965561b Mon Sep 17 00:00:00 2001
From: Camille GILLOT <gillot.camille@gmail.com>
Date: Sat, 28 Mar 2020 13:12:20 +0100
Subject: [PATCH] Monomorphise try_execute_query.

---
 src/librustc_query_system/query/config.rs   |  6 ++
 src/librustc_query_system/query/plumbing.rs | 75 +++++++++------------
 2 files changed, 38 insertions(+), 43 deletions(-)

diff --git a/src/librustc_query_system/query/config.rs b/src/librustc_query_system/query/config.rs
index 48fbdfb153e..a334e897e40 100644
--- a/src/librustc_query_system/query/config.rs
+++ b/src/librustc_query_system/query/config.rs
@@ -28,6 +28,7 @@ pub(crate) struct QueryVtable<CTX: QueryContext, K, V> {
     pub anon: bool,
     pub dep_kind: CTX::DepKind,
     pub eval_always: bool,
+    pub to_dep_node: fn(CTX, &K) -> DepNode<CTX::DepKind>,
 
     // Don't use this method to compute query results, instead use the methods on TyCtxt
     pub compute: fn(CTX, K) -> V,
@@ -39,6 +40,10 @@ pub(crate) struct QueryVtable<CTX: QueryContext, K, V> {
 }
 
 impl<CTX: QueryContext, K, V> QueryVtable<CTX, K, V> {
+    pub(crate) fn to_dep_node(&self, tcx: CTX, key: &K) -> DepNode<CTX::DepKind> {
+        (self.to_dep_node)(tcx, key)
+    }
+
     pub(crate) fn compute(&self, tcx: CTX, key: K) -> V {
         (self.compute)(tcx, key)
     }
@@ -112,6 +117,7 @@ where
     const VTABLE: QueryVtable<CTX, Q::Key, Q::Value> = QueryVtable {
         anon: Q::ANON,
         dep_kind: Q::DEP_KIND,
+        to_dep_node: Q::to_dep_node,
         eval_always: Q::EVAL_ALWAYS,
         compute: Q::compute,
         hash_result: Q::hash_result,
diff --git a/src/librustc_query_system/query/plumbing.rs b/src/librustc_query_system/query/plumbing.rs
index ff01538d95e..74a2288cfa7 100644
--- a/src/librustc_query_system/query/plumbing.rs
+++ b/src/librustc_query_system/query/plumbing.rs
@@ -382,17 +382,21 @@ where
 }
 
 #[inline(always)]
-fn try_execute_query<Q, CTX>(
+fn try_execute_query<CTX, C>(
     tcx: CTX,
+    state: &QueryState<CTX, C>,
     span: Span,
-    key: Q::Key,
-    lookup: QueryLookup<'_, CTX, Q::Key, <Q::Cache as QueryCache>::Sharded>,
-) -> Q::Stored
+    key: C::Key,
+    lookup: QueryLookup<'_, CTX, C::Key, C::Sharded>,
+    query: &QueryVtable<CTX, C::Key, C::Value>,
+) -> C::Stored
 where
-    Q: QueryDescription<CTX>,
+    C: QueryCache,
+    C::Key: Eq + Clone + Debug,
+    C::Stored: Clone,
     CTX: QueryContext,
 {
-    let job = match JobOwner::try_start(tcx, Q::query_state(tcx), span, &key, lookup, &Q::VTABLE) {
+    let job = match JobOwner::try_start(tcx, state, span, &key, lookup, query) {
         TryGetJob::NotYetStarted(job) => job,
         TryGetJob::Cycle(result) => return result,
         #[cfg(parallel_compiler)]
@@ -406,18 +410,32 @@ where
     // expensive for some `DepKind`s.
     if !tcx.dep_graph().is_fully_enabled() {
         let null_dep_node = DepNode::new_no_params(DepKind::NULL);
-        return force_query_with_job(tcx, key, job, null_dep_node, &Q::VTABLE).0;
+        return force_query_with_job(tcx, key, job, null_dep_node, query).0;
     }
 
-    if Q::ANON {
-        let (result, dep_node_index) = try_execute_anon_query(tcx, key, job.id, &Q::VTABLE);
+    if query.anon {
+        let prof_timer = tcx.profiler().query_provider();
+
+        let ((result, dep_node_index), diagnostics) = with_diagnostics(|diagnostics| {
+            tcx.start_query(job.id, diagnostics, |tcx| {
+                tcx.dep_graph().with_anon_task(query.dep_kind, || query.compute(tcx, key))
+            })
+        });
+
+        prof_timer.finish_with_query_invocation_id(dep_node_index.into());
+
+        tcx.dep_graph().read_index(dep_node_index);
+
+        if unlikely!(!diagnostics.is_empty()) {
+            tcx.store_diagnostics_for_anon_node(dep_node_index, diagnostics);
+        }
 
         return job.complete(tcx, result, dep_node_index);
     }
 
-    let dep_node = Q::to_dep_node(tcx, &key);
+    let dep_node = query.to_dep_node(tcx, &key);
 
-    if !Q::EVAL_ALWAYS {
+    if !query.eval_always {
         // The diagnostics for this query will be
         // promoted to the current session during
         // `try_mark_green()`, so we can ignore them here.
@@ -431,7 +449,7 @@ where
                         prev_dep_node_index,
                         dep_node_index,
                         &dep_node,
-                        &Q::VTABLE,
+                        query,
                     ),
                     dep_node_index,
                 )
@@ -442,40 +460,11 @@ where
         }
     }
 
-    let (result, dep_node_index) = force_query_with_job(tcx, key, job, dep_node, &Q::VTABLE);
+    let (result, dep_node_index) = force_query_with_job(tcx, key, job, dep_node, query);
     tcx.dep_graph().read_index(dep_node_index);
     result
 }
 
-fn try_execute_anon_query<CTX, K, V>(
-    tcx: CTX,
-    key: K,
-    job_id: QueryJobId<CTX::DepKind>,
-    query: &QueryVtable<CTX, K, V>,
-) -> (V, DepNodeIndex)
-where
-    CTX: QueryContext,
-{
-    debug_assert!(query.anon);
-    let prof_timer = tcx.profiler().query_provider();
-
-    let ((result, dep_node_index), diagnostics) = with_diagnostics(|diagnostics| {
-        tcx.start_query(job_id, diagnostics, |tcx| {
-            tcx.dep_graph().with_anon_task(query.dep_kind, || query.compute(tcx, key))
-        })
-    });
-
-    prof_timer.finish_with_query_invocation_id(dep_node_index.into());
-
-    tcx.dep_graph().read_index(dep_node_index);
-
-    if unlikely!(!diagnostics.is_empty()) {
-        tcx.store_diagnostics_for_anon_node(dep_node_index, diagnostics);
-    }
-
-    (result, dep_node_index)
-}
-
 fn load_from_disk_and_cache_in_memory<CTX, K, V>(
     tcx: CTX,
     key: K,
@@ -639,7 +628,7 @@ where
             tcx.dep_graph().read_index(index);
             value.clone()
         },
-        |key, lookup| try_execute_query::<Q, _>(tcx, span, key, lookup),
+        |key, lookup| try_execute_query(tcx, Q::query_state(tcx), span, key, lookup, &Q::VTABLE),
     )
 }