3 files changed, 19 insertions, 26 deletions
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 5a447aa6237..976d7c2b9ec 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -3,14 +3,14 @@
 
 pub use crate::options::*;
 
-use crate::lint;
 use crate::search_paths::SearchPath;
 use crate::utils::{CanonicalizedPath, NativeLib, NativeLibKind};
 use crate::{early_error, early_warn, Session};
+use crate::{lint, HashStableContext};
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_data_structures::impl_stable_hash_via_hash;
 
+use rustc_data_structures::stable_hasher::ToStableHashKey;
 use rustc_target::abi::{Align, TargetDataLayout};
 use rustc_target::spec::{LinkerFlavor, SplitDebuginfo, Target, TargetTriple, TargetWarnings};
 use rustc_target::spec::{PanicStrategy, SanitizerSet, TARGETS};
@@ -80,7 +80,7 @@ pub enum CFProtection {
     Full,
 }
 
-#[derive(Clone, Copy, Debug, PartialEq, Hash)]
+#[derive(Clone, Copy, Debug, PartialEq, Hash, HashStable_Generic)]
 pub enum OptLevel {
     No,         // -O0
     Less,       // -O1
@@ -90,8 +90,6 @@ pub enum OptLevel {
     SizeMin,    // -Oz
 }
 
-impl_stable_hash_via_hash!(OptLevel);
-
 /// This is what the `LtoCli` values get mapped to after resolving defaults and
 /// and taking other command line options into account.
 ///
@@ -232,15 +230,13 @@ impl SwitchWithOptPath {
     }
 }
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, HashStable_Generic)]
 #[derive(Encodable, Decodable)]
 pub enum SymbolManglingVersion {
     Legacy,
     V0,
 }
 
-impl_stable_hash_via_hash!(SymbolManglingVersion);
-
 #[derive(Clone, Copy, Debug, PartialEq, Hash)]
 pub enum DebugInfo {
     None,
@@ -279,7 +275,7 @@ impl FromStr for SplitDwarfKind {
     }
 }
 
-#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, PartialOrd, Ord)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, PartialOrd, Ord, HashStable_Generic)]
 #[derive(Encodable, Decodable)]
 pub enum OutputType {
     Bitcode,
@@ -292,7 +288,13 @@ pub enum OutputType {
     DepInfo,
 }
 
-impl_stable_hash_via_hash!(OutputType);
+impl<HCX: HashStableContext> ToStableHashKey<HCX> for OutputType {
+    type KeyType = Self;
+
+    fn to_stable_hash_key(&self, _: &HCX) -> Self::KeyType {
+        *self
+    }
+}
 
 impl OutputType {
     fn is_compatible_with_codegen_units_and_single_output_file(&self) -> bool {
@@ -398,7 +400,7 @@ pub enum TrimmedDefPaths {
 /// *Do not* switch `BTreeMap` out for an unsorted container type! That would break
 /// dependency tracking for command-line arguments. Also only hash keys, since tracking
 /// should only depend on the output types, not the paths they're written to.
-#[derive(Clone, Debug, Hash)]
+#[derive(Clone, Debug, Hash, HashStable_Generic)]
 pub struct OutputTypes(BTreeMap<OutputType, Option<PathBuf>>);
 
 impl OutputTypes {
@@ -630,7 +632,7 @@ impl Input {
     }
 }
 
-#[derive(Clone, Hash, Debug)]
+#[derive(Clone, Hash, Debug, HashStable_Generic)]
 pub struct OutputFilenames {
     pub out_directory: PathBuf,
     filestem: String,
@@ -639,8 +641,6 @@ pub struct OutputFilenames {
     pub outputs: OutputTypes,
 }
 
-impl_stable_hash_via_hash!(OutputFilenames);
-
 pub const RLINK_EXT: &str = "rlink";
 pub const RUST_CGU_EXT: &str = "rcgu";
 pub const DWARF_OBJECT_EXT: &str = "dwo";
@@ -854,15 +854,14 @@ impl DebuggingOptions {
 }
 
 // The type of entry function, so users can have their own entry functions
-#[derive(Copy, Clone, PartialEq, Hash, Debug)]
+#[derive(Copy, Clone, PartialEq, Hash, Debug, HashStable_Generic)]
 pub enum EntryFnType {
     Main,
     Start,
 }
 
-impl_stable_hash_via_hash!(EntryFnType);
-
 #[derive(Copy, PartialEq, PartialOrd, Clone, Ord, Eq, Hash, Debug, Encodable, Decodable)]
+#[derive(HashStable_Generic)]
 pub enum CrateType {
     Executable,
     Dylib,
@@ -872,8 +871,6 @@ pub enum CrateType {
     ProcMacro,
 }
 
-impl_stable_hash_via_hash!(CrateType);
-
 impl CrateType {
     /// When generated, is this crate type an archive?
     pub fn is_archive(&self) -> bool {
diff --git a/compiler/rustc_session/src/search_paths.rs b/compiler/rustc_session/src/search_paths.rs
index b6bde28233d..56a6b6f3b03 100644
--- a/compiler/rustc_session/src/search_paths.rs
+++ b/compiler/rustc_session/src/search_paths.rs
@@ -26,7 +26,7 @@ pub struct SearchPathFile {
     pub file_name_str: String,
 }
 
-#[derive(PartialEq, Clone, Copy, Debug, Hash, Eq, Encodable, Decodable)]
+#[derive(PartialEq, Clone, Copy, Debug, Hash, Eq, Encodable, Decodable, HashStable_Generic)]
 pub enum PathKind {
     Native,
     Crate,
@@ -36,8 +36,6 @@ pub enum PathKind {
     All,
 }
 
-rustc_data_structures::impl_stable_hash_via_hash!(PathKind);
-
 impl PathKind {
     pub fn matches(&self, kind: PathKind) -> bool {
         match (self, kind) {
diff --git a/compiler/rustc_session/src/utils.rs b/compiler/rustc_session/src/utils.rs
index 9a286d94ab8..8064c217457 100644
--- a/compiler/rustc_session/src/utils.rs
+++ b/compiler/rustc_session/src/utils.rs
@@ -18,6 +18,7 @@ impl Session {
 }
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Encodable, Decodable)]
+#[derive(HashStable_Generic)]
 pub enum NativeLibKind {
     /// Static library (e.g. `libfoo.a` on Linux or `foo.lib` on Windows/MSVC)
     Static {
@@ -57,9 +58,8 @@ impl NativeLibKind {
     }
 }
 
-rustc_data_structures::impl_stable_hash_via_hash!(NativeLibKind);
-
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Encodable, Decodable)]
+#[derive(HashStable_Generic)]
 pub struct NativeLib {
     pub name: String,
     pub new_name: Option<String>,
@@ -73,8 +73,6 @@ impl NativeLib {
     }
 }
 
-rustc_data_structures::impl_stable_hash_via_hash!(NativeLib);
-
 /// A path that has been canonicalized along with its original, non-canonicalized form
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub struct CanonicalizedPath {