Auto merge of rust-lang#132435 - workingjubilee:rollup-3mgogw9, r=workingjubilee

Rollup of 9 pull requests

Successful merges:

 - rust-lang#131168 (Fix `target_os` for `mipsel-sony-psx`)
 - rust-lang#132209 (Fix validation when lowering `?` trait bounds)
 - rust-lang#132294 (Bump Fuchsia)
 - rust-lang#132357 (Improve missing_abi lint)
 - rust-lang#132385 (compiler: Move `rustc_target::spec::abi::Abi` to `rustc_abi::ExternAbi`)
 - rust-lang#132403 (continue `TypingMode` refactor)
 - rust-lang#132417 (macOS: Document the difference between Clang's `-darwin` and `-macosx` targets)
 - rust-lang#132421 (Remove `""` case from RISC-V `llvm_abiname` match statement)
 - rust-lang#132422 (llvm: Match new LLVM 128-bit integer alignment on sparc)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -3204,9 +3204,11 @@ dependencies = [
  "rand",
  "rand_xoshiro",
  "rustc_data_structures",
+ "rustc_feature",
  "rustc_index",
  "rustc_macros",
  "rustc_serialize",
+ "rustc_span",
  "tracing",
 ]
 
@@ -3749,11 +3751,11 @@ dependencies = [
 name = "rustc_hir_pretty"
 version = "0.0.0"
 dependencies = [
+ "rustc_abi",
  "rustc_ast",
  "rustc_ast_pretty",
  "rustc_hir",
  "rustc_span",
- "rustc_target",
 ]
 
 [[package]]
@@ -3938,14 +3940,14 @@ dependencies = [
 name = "rustc_lint_defs"
 version = "0.0.0"
 dependencies = [
+ "rustc_abi",
  "rustc_ast",
  "rustc_data_structures",
  "rustc_error_messages",
  "rustc_hir",
  "rustc_macros",
  "rustc_serialize",
  "rustc_span",
- "rustc_target",
  "serde",
 ]
 
@@ -4054,6 +4056,7 @@ version = "0.0.0"
 dependencies = [
  "either",
  "itertools",
+ "rustc_abi",
  "rustc_apfloat",
  "rustc_arena",
  "rustc_ast",
@@ -4069,7 +4072,6 @@ dependencies = [
  "rustc_pattern_analysis",
  "rustc_session",
  "rustc_span",
- "rustc_target",
  "rustc_trait_selection",
  "tracing",
 ]

compiler/rustc_abi/Cargo.toml

@@ -9,9 +9,11 @@ bitflags = "2.4.1"
 rand = { version = "0.8.4", default-features = false, optional = true }
 rand_xoshiro = { version = "0.6.0", optional = true }
 rustc_data_structures = { path = "../rustc_data_structures", optional = true  }
+rustc_feature = { path = "../rustc_feature", optional = true }
 rustc_index = { path = "../rustc_index", default-features = false }
 rustc_macros = { path = "../rustc_macros", optional = true }
 rustc_serialize = { path = "../rustc_serialize", optional = true  }
+rustc_span = { path = "../rustc_span", optional = true }
 tracing = "0.1"
 # tidy-alphabetical-end
 
@@ -22,8 +24,10 @@ default = ["nightly", "randomize"]
 # without depending on rustc_data_structures, rustc_macros and rustc_serialize
 nightly = [
     "dep:rustc_data_structures",
+    "dep:rustc_feature",
     "dep:rustc_macros",
     "dep:rustc_serialize",
+    "dep:rustc_span",
     "rustc_index/nightly",
 ]
 randomize = ["dep:rand", "dep:rand_xoshiro", "nightly"]

compiler/rustc_target/src/spec/abi/mod.rs renamed to compiler/rustc_abi/src/extern_abi/mod.rs

@@ -7,9 +7,11 @@ use rustc_span::{Span, Symbol};
 #[cfg(test)]
 mod tests;
 
+use ExternAbi as Abi;
+
 #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Debug)]
 #[derive(HashStable_Generic, Encodable, Decodable)]
-pub enum Abi {
+pub enum ExternAbi {
     // Some of the ABIs come first because every time we add a new ABI, we have to re-bless all the
     // hashing tests. These are used in many places, so giving them stable values reduces test
     // churn. The specific values are meaningless.

compiler/rustc_target/src/spec/abi/tests.rs renamed to compiler/rustc_abi/src/extern_abi/tests.rs

@@ -1,6 +1,7 @@
 // tidy-alphabetical-start
 #![cfg_attr(feature = "nightly", allow(internal_features))]
 #![cfg_attr(feature = "nightly", doc(rust_logo))]
+#![cfg_attr(feature = "nightly", feature(assert_matches))]
 #![cfg_attr(feature = "nightly", feature(rustc_attrs))]
 #![cfg_attr(feature = "nightly", feature(rustdoc_internals))]
 #![cfg_attr(feature = "nightly", feature(step_trait))]
@@ -28,8 +29,15 @@ mod layout;
 #[cfg(test)]
 mod tests;
 
+#[cfg(feature = "nightly")]
+mod extern_abi;
+
 pub use callconv::{Heterogeneous, HomogeneousAggregate, Reg, RegKind};
 #[cfg(feature = "nightly")]
+pub use extern_abi::{
+    AbiDisabled, AbiUnsupported, ExternAbi, all_names, enabled_names, is_enabled, is_stable, lookup,
+};
+#[cfg(feature = "nightly")]
 pub use layout::{FIRST_VARIANT, FieldIdx, Layout, TyAbiInterface, TyAndLayout, VariantIdx};
 pub use layout::{LayoutCalculator, LayoutCalculatorError};
 

compiler/rustc_abi/src/lib.rs

@@ -2810,6 +2810,8 @@ pub struct ModSpans {
 /// E.g., `extern { .. }` or `extern "C" { .. }`.
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct ForeignMod {
+    /// Span of the `extern` keyword.
+    pub extern_span: Span,
     /// `unsafe` keyword accepted syntactically for macro DSLs, but not
     /// semantically by Rust.
     pub safety: Safety,

compiler/rustc_ast/src/ast.rs

@@ -525,7 +525,7 @@ pub fn walk_ty<T: MutVisitor>(vis: &mut T, ty: &mut P<Ty>) {
 }
 
 fn walk_foreign_mod<T: MutVisitor>(vis: &mut T, foreign_mod: &mut ForeignMod) {
-    let ForeignMod { safety, abi: _, items } = foreign_mod;
+    let ForeignMod { extern_span: _, safety, abi: _, items } = foreign_mod;
     visit_safety(vis, safety);
     items.flat_map_in_place(|item| vis.flat_map_foreign_item(item));
 }

compiler/rustc_ast/src/mut_visit.rs

@@ -366,7 +366,7 @@ impl WalkItemKind for ItemKind {
                 }
                 ModKind::Unloaded => {}
             },
-            ItemKind::ForeignMod(ForeignMod { safety: _, abi: _, items }) => {
+            ItemKind::ForeignMod(ForeignMod { extern_span: _, safety: _, abi: _, items }) => {
                 walk_list!(visitor, visit_foreign_item, items);
             }
             ItemKind::GlobalAsm(asm) => try_visit!(visitor.visit_inline_asm(asm)),

compiler/rustc_ast/src/visit.rs

@@ -677,9 +677,8 @@ impl<'a> AstValidator<'a> {
                 Self::check_decl_no_pat(&bfty.decl, |span, _, _| {
                     self.dcx().emit_err(errors::PatternFnPointer { span });
                 });
-                if let Extern::Implicit(_) = bfty.ext {
-                    let sig_span = self.sess.source_map().next_point(ty.span.shrink_to_lo());
-                    self.maybe_lint_missing_abi(sig_span, ty.id);
+                if let Extern::Implicit(extern_span) = bfty.ext {
+                    self.maybe_lint_missing_abi(extern_span, ty.id);
                 }
             }
             TyKind::TraitObject(bounds, ..) => {
@@ -953,7 +952,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                 walk_list!(self, visit_attribute, &item.attrs);
                 return; // Avoid visiting again.
             }
-            ItemKind::ForeignMod(ForeignMod { abi, safety, .. }) => {
+            ItemKind::ForeignMod(ForeignMod { extern_span, abi, safety, .. }) => {
                 self.with_in_extern_mod(*safety, |this| {
                     let old_item = mem::replace(&mut this.extern_mod, Some(item.span));
                     this.visibility_not_permitted(
@@ -977,7 +976,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                     }
 
                     if abi.is_none() {
-                        this.maybe_lint_missing_abi(item.span, item.id);
+                        this.maybe_lint_missing_abi(*extern_span, item.id);
                     }
                     visit::walk_item(this, item);
                     this.extern_mod = old_item;
@@ -1350,13 +1349,13 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
         if let FnKind::Fn(
             _,
             _,
-            FnSig { span: sig_span, header: FnHeader { ext: Extern::Implicit(_), .. }, .. },
+            FnSig { header: FnHeader { ext: Extern::Implicit(extern_span), .. }, .. },
             _,
             _,
             _,
         ) = fk
         {
-            self.maybe_lint_missing_abi(*sig_span, id);
+            self.maybe_lint_missing_abi(*extern_span, id);
         }
 
         // Functions without bodies cannot have patterns.

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -148,6 +148,11 @@ pub(crate) unsafe fn create_module<'ll>(
             target_data_layout =
                 target_data_layout.replace("-p270:32:32-p271:32:32-p272:64:64", "");
         }
+        if sess.target.arch.starts_with("sparc") {
+            // LLVM 20 updates the sparc layout to correctly align 128 bit integers to 128 bit.
+            // See https://github.com/llvm/llvm-project/pull/106951
+            target_data_layout = target_data_layout.replace("-i128:128", "");
+        }
     }
 
     // Ensure the data-layout values hardcoded remain the defaults.