From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_query_system/src/dep_graph/mod.rs | 106 +++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 compiler/rustc_query_system/src/dep_graph/mod.rs

(limited to 'compiler/rustc_query_system/src/dep_graph/mod.rs')

diff --git a/compiler/rustc_query_system/src/dep_graph/mod.rs b/compiler/rustc_query_system/src/dep_graph/mod.rs
new file mode 100644
index 000000000..342d95ca4
--- /dev/null
+++ b/compiler/rustc_query_system/src/dep_graph/mod.rs
@@ -0,0 +1,106 @@
+pub mod debug;
+mod dep_node;
+mod graph;
+mod query;
+mod serialized;
+
+pub use dep_node::{DepNode, DepNodeParams, WorkProductId};
+pub use graph::{
+    hash_result, DepGraph, DepNodeColor, DepNodeIndex, TaskDeps, TaskDepsRef, WorkProduct,
+};
+pub use query::DepGraphQuery;
+pub use serialized::{SerializedDepGraph, SerializedDepNodeIndex};
+
+use crate::ich::StableHashingContext;
+use rustc_data_structures::profiling::SelfProfilerRef;
+use rustc_serialize::{opaque::FileEncoder, Encodable};
+use rustc_session::Session;
+
+use std::fmt;
+use std::hash::Hash;
+
+pub trait DepContext: Copy {
+    type DepKind: self::DepKind;
+
+    /// Create a hashing context for hashing new results.
+    fn with_stable_hashing_context<R>(&self, f: impl FnOnce(StableHashingContext<'_>) -> R) -> R;
+
+    /// Access the DepGraph.
+    fn dep_graph(&self) -> &DepGraph<Self::DepKind>;
+
+    /// Access the profiler.
+    fn profiler(&self) -> &SelfProfilerRef;
+
+    /// Access the compiler session.
+    fn sess(&self) -> &Session;
+
+    /// Return whether this kind always require evaluation.
+    fn is_eval_always(&self, kind: Self::DepKind) -> bool;
+
+    fn fingerprint_style(&self, kind: Self::DepKind) -> FingerprintStyle;
+
+    /// Try to force a dep node to execute and see if it's green.
+    fn try_force_from_dep_node(&self, dep_node: DepNode<Self::DepKind>) -> bool;
+
+    /// Load data from the on-disk cache.
+    fn try_load_from_on_disk_cache(&self, dep_node: DepNode<Self::DepKind>);
+}
+
+pub trait HasDepContext: Copy {
+    type DepKind: self::DepKind;
+    type DepContext: self::DepContext<DepKind = Self::DepKind>;
+
+    fn dep_context(&self) -> &Self::DepContext;
+}
+
+impl<T: DepContext> HasDepContext for T {
+    type DepKind = T::DepKind;
+    type DepContext = Self;
+
+    fn dep_context(&self) -> &Self::DepContext {
+        self
+    }
+}
+
+/// Describes the contents of the fingerprint generated by a given query.
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+pub enum FingerprintStyle {
+    /// The fingerprint is actually a DefPathHash.
+    DefPathHash,
+    /// Query key was `()` or equivalent, so fingerprint is just zero.
+    Unit,
+    /// Some opaque hash.
+    Opaque,
+}
+
+impl FingerprintStyle {
+    #[inline]
+    pub fn reconstructible(self) -> bool {
+        match self {
+            FingerprintStyle::DefPathHash | FingerprintStyle::Unit => true,
+            FingerprintStyle::Opaque => false,
+        }
+    }
+}
+
+/// Describe the different families of dependency nodes.
+pub trait DepKind: Copy + fmt::Debug + Eq + Hash + Send + Encodable<FileEncoder> + 'static {
+    /// DepKind to use when incr. comp. is turned off.
+    const NULL: Self;
+
+    /// DepKind to use to create the initial forever-red node.
+    const RED: Self;
+
+    /// Implementation of `std::fmt::Debug` for `DepNode`.
+    fn debug_node(node: &DepNode<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result;
+
+    /// Execute the operation with provided dependencies.
+    fn with_deps<OP, R>(deps: TaskDepsRef<'_, Self>, op: OP) -> R
+    where
+        OP: FnOnce() -> R;
+
+    /// Access dependencies from current implicit context.
+    fn read_deps<OP>(op: OP)
+    where
+        OP: for<'a> FnOnce(TaskDepsRef<'a, Self>);
+}
-- 
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