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-rw-r--r--Cargo.lock1
-rw-r--r--compiler/rustc_attr_data_structures/src/encode_cross_crate.rs42
-rw-r--r--compiler/rustc_attr_data_structures/src/lib.rs2
-rw-r--r--compiler/rustc_codegen_gcc/src/builder.rs4
-rw-r--r--compiler/rustc_codegen_llvm/src/builder.rs3
-rw-r--r--compiler/rustc_codegen_ssa/src/traits/builder.rs2
-rw-r--r--compiler/rustc_feature/Cargo.toml3
-rw-r--r--compiler/rustc_feature/src/builtin_attrs.rs7
-rw-r--r--compiler/rustc_metadata/src/rmeta/encoder.rs10
9 files changed, 59 insertions, 15 deletions
diff --git a/Cargo.lock b/Cargo.lock
index b44dbd6ee60..e95cacf1f6d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3724,6 +3724,7 @@ dependencies = [
 name = "rustc_feature"
 version = "0.0.0"
 dependencies = [
+ "rustc_attr_data_structures",
  "rustc_data_structures",
  "rustc_span",
  "serde",
diff --git a/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
new file mode 100644
index 00000000000..e41dd8bde8f
--- /dev/null
+++ b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
@@ -0,0 +1,42 @@
+use crate::AttributeKind;
+
+#[derive(PartialEq)]
+pub enum EncodeCrossCrate {
+    Yes,
+    No,
+}
+
+impl AttributeKind {
+    pub fn encode_cross_crate(&self) -> EncodeCrossCrate {
+        use AttributeKind::*;
+        use EncodeCrossCrate::*;
+
+        match self {
+            Align { .. } => No,
+            AllowConstFnUnstable(..) => No,
+            AllowInternalUnstable(..) => Yes,
+            AsPtr(..) => Yes,
+            BodyStability { .. } => No,
+            Confusables { .. } => Yes,
+            ConstStability { .. } => Yes,
+            ConstStabilityIndirect => No,
+            Deprecation { .. } => Yes,
+            DocComment { .. } => Yes,
+            Inline(..) => No,
+            MacroTransparency(..) => Yes,
+            Repr(..) => No,
+            Stability { .. } => Yes,
+            Cold(..) => No,
+            ConstContinue(..) => No,
+            LoopMatch(..) => No,
+            MayDangle(..) => No,
+            MustUse { .. } => Yes,
+            Naked(..) => No,
+            NoMangle(..) => No,
+            Optimize(..) => No,
+            PubTransparent(..) => Yes,
+            SkipDuringMethodDispatch { .. } => No,
+            TrackCaller(..) => Yes,
+        }
+    }
+}
diff --git a/compiler/rustc_attr_data_structures/src/lib.rs b/compiler/rustc_attr_data_structures/src/lib.rs
index f8355be09ad..86c73f0d9a0 100644
--- a/compiler/rustc_attr_data_structures/src/lib.rs
+++ b/compiler/rustc_attr_data_structures/src/lib.rs
@@ -9,6 +9,7 @@
 // tidy-alphabetical-end
 
 mod attributes;
+mod encode_cross_crate;
 mod stability;
 mod version;
 
@@ -17,6 +18,7 @@ pub mod lints;
 use std::num::NonZero;
 
 pub use attributes::*;
+pub use encode_cross_crate::EncodeCrossCrate;
 use rustc_abi::Align;
 use rustc_ast::token::CommentKind;
 use rustc_ast::{AttrStyle, IntTy, UintTy};
diff --git a/compiler/rustc_codegen_gcc/src/builder.rs b/compiler/rustc_codegen_gcc/src/builder.rs
index a2e34d1f8fb..7852aebe0c2 100644
--- a/compiler/rustc_codegen_gcc/src/builder.rs
+++ b/compiler/rustc_codegen_gcc/src/builder.rs
@@ -1591,9 +1591,9 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         (value1, value2)
     }
 
-    fn filter_landing_pad(&mut self, pers_fn: RValue<'gcc>) -> (RValue<'gcc>, RValue<'gcc>) {
+    fn filter_landing_pad(&mut self, pers_fn: RValue<'gcc>) {
         // TODO(antoyo): generate the correct landing pad
-        self.cleanup_landing_pad(pers_fn)
+        self.cleanup_landing_pad(pers_fn);
     }
 
     #[cfg(feature = "master")]
diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs
index 5e9594dd06b..d0aa7320b4b 100644
--- a/compiler/rustc_codegen_llvm/src/builder.rs
+++ b/compiler/rustc_codegen_llvm/src/builder.rs
@@ -1166,11 +1166,10 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         (self.extract_value(landing_pad, 0), self.extract_value(landing_pad, 1))
     }
 
-    fn filter_landing_pad(&mut self, pers_fn: &'ll Value) -> (&'ll Value, &'ll Value) {
+    fn filter_landing_pad(&mut self, pers_fn: &'ll Value) {
         let ty = self.type_struct(&[self.type_ptr(), self.type_i32()], false);
         let landing_pad = self.landing_pad(ty, pers_fn, 1);
         self.add_clause(landing_pad, self.const_array(self.type_ptr(), &[]));
-        (self.extract_value(landing_pad, 0), self.extract_value(landing_pad, 1))
     }
 
     fn resume(&mut self, exn0: &'ll Value, exn1: &'ll Value) {
diff --git a/compiler/rustc_codegen_ssa/src/traits/builder.rs b/compiler/rustc_codegen_ssa/src/traits/builder.rs
index f35f551d590..d19de6f5d26 100644
--- a/compiler/rustc_codegen_ssa/src/traits/builder.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/builder.rs
@@ -516,7 +516,7 @@ pub trait BuilderMethods<'a, 'tcx>:
 
     // These are used by everyone except msvc
     fn cleanup_landing_pad(&mut self, pers_fn: Self::Function) -> (Self::Value, Self::Value);
-    fn filter_landing_pad(&mut self, pers_fn: Self::Function) -> (Self::Value, Self::Value);
+    fn filter_landing_pad(&mut self, pers_fn: Self::Function);
     fn resume(&mut self, exn0: Self::Value, exn1: Self::Value);
 
     // These are used only by msvc
diff --git a/compiler/rustc_feature/Cargo.toml b/compiler/rustc_feature/Cargo.toml
index a5ae06473cb..78d7b698b72 100644
--- a/compiler/rustc_feature/Cargo.toml
+++ b/compiler/rustc_feature/Cargo.toml
@@ -5,8 +5,9 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
+rustc_attr_data_structures = { path = "../rustc_attr_data_structures" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_span = { path = "../rustc_span" }
-serde = { version = "1.0.125", features = [ "derive" ] }
+serde = { version = "1.0.125", features = ["derive"] }
 serde_json = "1.0.59"
 # tidy-alphabetical-end
diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs
index 8c0f279e343..8e1392998d4 100644
--- a/compiler/rustc_feature/src/builtin_attrs.rs
+++ b/compiler/rustc_feature/src/builtin_attrs.rs
@@ -5,6 +5,7 @@ use std::sync::LazyLock;
 use AttributeDuplicates::*;
 use AttributeGate::*;
 use AttributeType::*;
+use rustc_attr_data_structures::EncodeCrossCrate;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_span::edition::Edition;
 use rustc_span::{Symbol, sym};
@@ -368,12 +369,6 @@ macro_rules! experimental {
     };
 }
 
-#[derive(PartialEq)]
-pub enum EncodeCrossCrate {
-    Yes,
-    No,
-}
-
 pub struct BuiltinAttribute {
     pub name: Symbol,
     /// Whether this attribute is encode cross crate.
diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs
index ed3c18a02a6..d74918235b6 100644
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@@ -5,7 +5,7 @@ use std::io::{Read, Seek, Write};
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
-use rustc_ast::attr::AttributeExt;
+use rustc_attr_data_structures::EncodeCrossCrate;
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
 use rustc_data_structures::memmap::{Mmap, MmapMut};
 use rustc_data_structures::sync::{join, par_for_each_in};
@@ -839,9 +839,13 @@ struct AnalyzeAttrState<'a> {
 /// visibility: this is a piece of data that can be computed once per defid, and not once per
 /// attribute. Some attributes would only be usable downstream if they are public.
 #[inline]
-fn analyze_attr(attr: &impl AttributeExt, state: &mut AnalyzeAttrState<'_>) -> bool {
+fn analyze_attr(attr: &hir::Attribute, state: &mut AnalyzeAttrState<'_>) -> bool {
     let mut should_encode = false;
-    if let Some(name) = attr.name()
+    if let hir::Attribute::Parsed(p) = attr
+        && p.encode_cross_crate() == EncodeCrossCrate::No
+    {
+        // Attributes not marked encode-cross-crate don't need to be encoded for downstream crates.
+    } else if let Some(name) = attr.name()
         && !rustc_feature::encode_cross_crate(name)
     {
         // Attributes not marked encode-cross-crate don't need to be encoded for downstream crates.