Rollup merge of #136706 - workingjubilee:finish-up-rustc-abi-updates,…

… r=compiler-errors

compiler: mostly-finish `rustc_abi` updates

This almost-finishes all the updates in the compiler to use `rustc_abi` and removes some of the reexports of `rustc_abi` items in `rustc_target` that were previously available.

r? ```@compiler-errors```

clippy_lints/src/casts/cast_possible_truncation.rs

@@ -4,13 +4,13 @@ use clippy_utils::expr_or_init;
 use clippy_utils::source::snippet;
 use clippy_utils::sugg::Sugg;
 use clippy_utils::ty::{get_discriminant_value, is_isize_or_usize};
+use rustc_abi::IntegerType;
 use rustc_errors::{Applicability, Diag};
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{BinOpKind, Expr, ExprKind};
 use rustc_lint::LateContext;
 use rustc_middle::ty::{self, FloatTy, Ty};
 use rustc_span::Span;
-use rustc_target::abi::IntegerType;
 
 use super::{CAST_ENUM_TRUNCATION, CAST_POSSIBLE_TRUNCATION, utils};
 

clippy_lints/src/escape.rs

@@ -10,7 +10,7 @@ use rustc_session::impl_lint_pass;
 use rustc_span::Span;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::symbol::kw;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 pub struct BoxedLocal {
     too_large_for_stack: u64,
@@ -73,7 +73,7 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal {
         fn_def_id: LocalDefId,
     ) {
         if let Some(header) = fn_kind.header() {
-            if header.abi != Abi::Rust {
+            if header.abi != ExternAbi::Rust {
                 return;
             }
         }

clippy_lints/src/eta_reduction.rs

@@ -15,7 +15,7 @@ use rustc_middle::ty::{
 };
 use rustc_session::declare_lint_pass;
 use rustc_span::symbol::sym;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 use rustc_trait_selection::error_reporting::InferCtxtErrorExt as _;
 
 declare_clippy_lint! {
@@ -172,7 +172,7 @@ fn check_closure<'tcx>(cx: &LateContext<'tcx>, outer_receiver: Option<&Expr<'tcx
                         && let output = typeck.expr_ty(body.value)
                         && let ty::Tuple(tys) = *subs.type_at(1).kind()
                     {
-                        cx.tcx.mk_fn_sig(tys, output, false, Safety::Safe, Abi::Rust)
+                        cx.tcx.mk_fn_sig(tys, output, false, Safety::Safe, ExternAbi::Rust)
                     } else {
                         return;
                     }

clippy_lints/src/excessive_bools.rs

@@ -7,7 +7,7 @@ use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::impl_lint_pass;
 use rustc_span::Span;
 use rustc_span::def_id::LocalDefId;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -145,7 +145,7 @@ impl<'tcx> LateLintPass<'tcx> for ExcessiveBools {
     fn check_trait_item(&mut self, cx: &LateContext<'tcx>, trait_item: &'tcx TraitItem<'tcx>) {
         // functions with a body are already checked by `check_fn`
         if let TraitItemKind::Fn(fn_sig, TraitFn::Required(_)) = &trait_item.kind
-            && fn_sig.header.abi == Abi::Rust
+            && fn_sig.header.abi == ExternAbi::Rust
             && fn_sig.decl.inputs.len() as u64 > self.max_fn_params_bools
         {
             check_fn_decl(cx, fn_sig.decl, fn_sig.span, self.max_fn_params_bools);
@@ -162,7 +162,7 @@ impl<'tcx> LateLintPass<'tcx> for ExcessiveBools {
         def_id: LocalDefId,
     ) {
         if let Some(fn_header) = fn_kind.header()
-            && fn_header.abi == Abi::Rust
+            && fn_header.abi == ExternAbi::Rust
             && fn_decl.inputs.len() as u64 > self.max_fn_params_bools
             && get_parent_as_impl(cx.tcx, cx.tcx.local_def_id_to_hir_id(def_id))
                 .is_none_or(|impl_item| impl_item.of_trait.is_none())

clippy_lints/src/functions/too_many_arguments.rs

@@ -1,7 +1,7 @@
 use rustc_hir::{self as hir, intravisit};
 use rustc_lint::LateContext;
 use rustc_span::Span;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 use clippy_utils::diagnostics::span_lint;
 use clippy_utils::is_trait_impl_item;
@@ -23,11 +23,11 @@ pub(super) fn check_fn(
             intravisit::FnKind::Method(
                 _,
                 &hir::FnSig {
-                    header: hir::FnHeader { abi: Abi::Rust, .. },
+                    header: hir::FnHeader { abi: ExternAbi::Rust, .. },
                     ..
                 },
             )
-            | intravisit::FnKind::ItemFn(_, _, hir::FnHeader { abi: Abi::Rust, .. }) => check_arg_number(
+            | intravisit::FnKind::ItemFn(_, _, hir::FnHeader { abi: ExternAbi::Rust, .. }) => check_arg_number(
                 cx,
                 decl,
                 span.with_hi(decl.output.span().hi()),
@@ -41,7 +41,7 @@ pub(super) fn check_fn(
 pub(super) fn check_trait_item(cx: &LateContext<'_>, item: &hir::TraitItem<'_>, too_many_arguments_threshold: u64) {
     if let hir::TraitItemKind::Fn(ref sig, _) = item.kind {
         // don't lint extern functions decls, it's not their fault
-        if sig.header.abi == Abi::Rust {
+        if sig.header.abi == ExternAbi::Rust {
             check_arg_number(
                 cx,
                 sig.decl,

clippy_lints/src/inherent_to_string.rs

@@ -5,7 +5,7 @@ use rustc_hir::{GenericParamKind, ImplItem, ImplItemKind, LangItem};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
 use rustc_span::sym;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -96,7 +96,7 @@ impl<'tcx> LateLintPass<'tcx> for InherentToString {
             // #11201
             && let header = signature.header
             && header.is_safe()
-            && header.abi == Abi::Rust
+            && header.abi == ExternAbi::Rust
             && impl_item.ident.name == sym::to_string
             && let decl = signature.decl
             && decl.implicit_self.has_implicit_self()

clippy_lints/src/large_futures.rs

@@ -2,11 +2,11 @@ use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::snippet;
 use clippy_utils::ty::implements_trait;
+use rustc_abi::Size;
 use rustc_errors::Applicability;
 use rustc_hir::{Expr, ExprKind, LangItem, MatchSource, QPath};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::impl_lint_pass;
-use rustc_target::abi::Size;
 
 declare_clippy_lint! {
     /// ### What it does

clippy_lints/src/methods/mod.rs

@@ -149,6 +149,7 @@ use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::ty::{contains_ty_adt_constructor_opaque, implements_trait, is_copy, is_type_diagnostic_item};
 use clippy_utils::{contains_return, is_bool, is_trait_method, iter_input_pats, peel_blocks, return_ty};
 pub use path_ends_with_ext::DEFAULT_ALLOWED_DOTFILES;
+use rustc_abi::ExternAbi;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_hir::{Expr, ExprKind, Node, Stmt, StmtKind, TraitItem, TraitItemKind};
@@ -5447,7 +5448,7 @@ const FN_HEADER: hir::FnHeader = hir::FnHeader {
     safety: hir::HeaderSafety::Normal(hir::Safety::Safe),
     constness: hir::Constness::NotConst,
     asyncness: hir::IsAsync::NotAsync,
-    abi: rustc_target::spec::abi::Abi::Rust,
+    abi: ExternAbi::Rust,
 };
 
 struct ShouldImplTraitCase {

clippy_lints/src/missing_const_for_fn.rs

@@ -1,3 +1,4 @@
+
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::msrvs::{self, Msrv};
@@ -12,7 +13,7 @@ use rustc_middle::ty;
 use rustc_session::impl_lint_pass;
 use rustc_span::Span;
 use rustc_span::def_id::LocalDefId;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -183,11 +184,11 @@ fn already_const(header: hir::FnHeader) -> bool {
     header.constness == Constness::Const
 }
 
-fn could_be_const_with_abi(msrv: &Msrv, abi: Abi) -> bool {
+fn could_be_const_with_abi(msrv: &Msrv, abi: ExternAbi) -> bool {
     match abi {
-        Abi::Rust => true,
+        ExternAbi::Rust => true,
         // `const extern "C"` was stabilized after 1.62.0
-        Abi::C { unwind: false } => msrv.meets(msrvs::CONST_EXTERN_C_FN),
+        ExternAbi::C { unwind: false } => msrv.meets(msrvs::CONST_EXTERN_C_FN),
         // Rest ABIs are still unstable and need the `const_extern_fn` feature enabled.
         _ => msrv.meets(msrvs::CONST_EXTERN_FN),
     }

clippy_lints/src/needless_pass_by_ref_mut.rs

@@ -20,7 +20,7 @@ use rustc_session::impl_lint_pass;
 use rustc_span::Span;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::symbol::kw;
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -149,7 +149,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByRefMut<'tcx> {
                     return;
                 }
                 let attrs = cx.tcx.hir().attrs(hir_id);
-                if header.abi != Abi::Rust || requires_exact_signature(attrs) {
+                if header.abi != ExternAbi::Rust || requires_exact_signature(attrs) {
                     return;
                 }
                 header.is_async()

clippy_lints/src/needless_pass_by_value.rs

@@ -19,7 +19,7 @@ use rustc_session::declare_lint_pass;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::symbol::kw;
 use rustc_span::{Span, sym};
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 use rustc_trait_selection::traits;
 use rustc_trait_selection::traits::misc::type_allowed_to_implement_copy;
 
@@ -89,7 +89,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue {
         match kind {
             FnKind::ItemFn(.., header) => {
                 let attrs = cx.tcx.hir().attrs(hir_id);
-                if header.abi != Abi::Rust || requires_exact_signature(attrs) {
+                if header.abi != ExternAbi::Rust || requires_exact_signature(attrs) {
                     return;
                 }
             },

clippy_lints/src/no_mangle_with_rust_abi.rs

@@ -5,7 +5,7 @@ use rustc_hir::{Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
 use rustc_span::{BytePos, Pos};
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -46,7 +46,7 @@ impl<'tcx> LateLintPass<'tcx> for NoMangleWithRustAbi {
             for attr in attrs {
                 if let Some(ident) = attr.ident()
                     && ident.name == rustc_span::sym::no_mangle
-                    && fn_sig.header.abi == Abi::Rust
+                    && fn_sig.header.abi == ExternAbi::Rust
                     && let Some((fn_attrs, _)) = fn_snippet.rsplit_once("fn")
                     && !fn_attrs.contains("extern")
                 {

clippy_lints/src/non_copy_const.rs

@@ -5,6 +5,7 @@ use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::is_in_const_context;
 use clippy_utils::macros::macro_backtrace;
 use clippy_utils::ty::{InteriorMut, implements_trait};
+use rustc_abi::VariantIdx;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::DefId;
 use rustc_hir::{
@@ -16,7 +17,6 @@ use rustc_middle::ty::adjustment::Adjust;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_session::impl_lint_pass;
 use rustc_span::{DUMMY_SP, Span, sym};
-use rustc_target::abi::VariantIdx;
 
 // FIXME: this is a correctness problem but there's no suitable
 // warn-by-default category.

clippy_lints/src/pass_by_ref_or_value.rs

@@ -19,7 +19,7 @@ use rustc_middle::ty::{self, RegionKind, TyCtxt};
 use rustc_session::impl_lint_pass;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::{Span, sym};
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -277,7 +277,7 @@ impl<'tcx> LateLintPass<'tcx> for PassByRefOrValue {
         let hir_id = cx.tcx.local_def_id_to_hir_id(def_id);
         match kind {
             FnKind::ItemFn(.., header) => {
-                if header.abi != Abi::Rust {
+                if header.abi != ExternAbi::Rust {
                     return;
                 }
                 let attrs = cx.tcx.hir().attrs(hir_id);

clippy_lints/src/ptr.rs

@@ -19,7 +19,7 @@ use rustc_middle::ty::{self, Binder, ClauseKind, ExistentialPredicate, List, Pre
 use rustc_session::declare_lint_pass;
 use rustc_span::symbol::Symbol;
 use rustc_span::{Span, sym};
-use rustc_target::spec::abi::Abi;
+use rustc_abi::ExternAbi;
 use rustc_trait_selection::infer::InferCtxtExt as _;
 use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _;
 use std::{fmt, iter};
@@ -160,7 +160,7 @@ impl<'tcx> LateLintPass<'tcx> for Ptr {
 
             check_mut_from_ref(cx, sig, None);
 
-            if !matches!(sig.header.abi, Abi::Rust) {
+            if !matches!(sig.header.abi, ExternAbi::Rust) {
                 // Ignore `extern` functions with non-Rust calling conventions
                 return;
             }
@@ -220,7 +220,7 @@ impl<'tcx> LateLintPass<'tcx> for Ptr {
 
         check_mut_from_ref(cx, sig, Some(body));
 
-        if !matches!(sig.header.abi, Abi::Rust) {
+        if !matches!(sig.header.abi, ExternAbi::Rust) {
             // Ignore `extern` functions with non-Rust calling conventions
             return;
         }

clippy_lints/src/types/type_complexity.rs

@@ -1,9 +1,9 @@
 use clippy_utils::diagnostics::span_lint;
+use rustc_abi::ExternAbi;
 use rustc_hir::intravisit::{InferKind, Visitor, VisitorExt, walk_ty};
 use rustc_hir::{self as hir, AmbigArg, GenericParamKind, TyKind};
 use rustc_lint::LateContext;
 use rustc_span::Span;
-use rustc_target::spec::abi::Abi;
 
 use super::TYPE_COMPLEXITY;
 
@@ -50,7 +50,7 @@ impl<'tcx> Visitor<'tcx> for TypeComplexityVisitor {
             TyKind::Path(..) | TyKind::Slice(..) | TyKind::Tup(..) | TyKind::Array(..) => (10 * self.nest, 1),
 
             // function types bring a lot of overhead
-            TyKind::BareFn(bare) if bare.abi == Abi::Rust => (50 * self.nest, 1),
+            TyKind::BareFn(bare) if bare.abi == ExternAbi::Rust => (50 * self.nest, 1),
 
             TyKind::TraitObject(param_bounds, _) => {
                 let has_lifetime_parameters = param_bounds.iter().any(|bound| {

clippy_utils/src/check_proc_macro.rs

@@ -12,6 +12,7 @@
 //! code was written, and check if the span contains that text. Note this will only work correctly
 //! if the span is not from a `macro_rules` based macro.
 
+use rustc_abi::ExternAbi;
 use rustc_ast::AttrStyle;
 use rustc_ast::ast::{AttrKind, Attribute, IntTy, LitIntType, LitKind, StrStyle, TraitObjectSyntax, UintTy};
 use rustc_ast::token::CommentKind;
@@ -26,7 +27,6 @@ use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::symbol::{Ident, kw};
 use rustc_span::{Span, Symbol};
-use rustc_target::spec::abi::Abi;
 
 /// The search pattern to look for. Used by `span_matches_pat`
 #[derive(Clone)]
@@ -233,7 +233,7 @@ fn fn_header_search_pat(header: FnHeader) -> Pat {
         Pat::Str("const")
     } else if header.is_unsafe() {
         Pat::Str("unsafe")
-    } else if header.abi != Abi::Rust {
+    } else if header.abi != ExternAbi::Rust {
         Pat::Str("extern")
     } else {
         Pat::MultiStr(&["fn", "extern"])
@@ -375,7 +375,7 @@ fn ty_search_pat(ty: &Ty<'_>) -> (Pat, Pat) {
         TyKind::BareFn(bare_fn) => (
             if bare_fn.safety.is_unsafe() {
                 Pat::Str("unsafe")
-            } else if bare_fn.abi != Abi::Rust {
+            } else if bare_fn.abi != ExternAbi::Rust {
                 Pat::Str("extern")
             } else {
                 Pat::MultiStr(&["fn", "extern"])

clippy_utils/src/consts.rs

@@ -9,6 +9,7 @@ use std::sync::Arc;
 use crate::source::{SpanRangeExt, walk_span_to_context};
 use crate::{clip, is_direct_expn_of, sext, unsext};
 
+use rustc_abi::Size;
 use rustc_apfloat::Float;
 use rustc_apfloat::ieee::{Half, Quad};
 use rustc_ast::ast::{self, LitFloatType, LitKind};
@@ -25,7 +26,6 @@ use rustc_middle::{bug, mir, span_bug};
 use rustc_span::def_id::DefId;
 use rustc_span::symbol::Ident;
 use rustc_span::{SyntaxContext, sym};
-use rustc_target::abi::Size;
 use std::cell::Cell;
 use std::cmp::Ordering;
 use std::hash::{Hash, Hasher};

clippy_utils/src/lib.rs

@@ -29,6 +29,7 @@
 
 // FIXME: switch to something more ergonomic here, once available.
 // (Currently there is no way to opt into sysroot crates without `extern crate`.)
+extern crate rustc_abi;
 extern crate rustc_ast;
 extern crate rustc_ast_pretty;
 extern crate rustc_attr_parsing;
@@ -48,7 +49,6 @@ extern crate rustc_middle;
 extern crate rustc_mir_dataflow;
 extern crate rustc_session;
 extern crate rustc_span;
-extern crate rustc_target;
 extern crate rustc_trait_selection;
 extern crate smallvec;
 
@@ -123,7 +123,7 @@ use rustc_span::hygiene::{ExpnKind, MacroKind};
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::{Ident, Symbol, kw};
 use rustc_span::{InnerSpan, Span, sym};
-use rustc_target::abi::Integer;
+use rustc_abi::Integer;
 use visitors::{Visitable, for_each_unconsumed_temporary};
 
 use crate::consts::{ConstEvalCtxt, Constant, mir_to_const};