clippy: directly use rustc_abi instead of reexports

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};

clippy_utils/src/ty/mod.rs

@@ -4,6 +4,7 @@
 
 use core::ops::ControlFlow;
 use itertools::Itertools;
+use rustc_abi::VariantIdx;
 use rustc_ast::ast::Mutability;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir as hir;
@@ -23,7 +24,6 @@ use rustc_middle::ty::{
 };
 use rustc_span::symbol::Ident;
 use rustc_span::{DUMMY_SP, Span, Symbol, sym};
-use rustc_target::abi::VariantIdx;
 use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _;
 use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
 use rustc_trait_selection::traits::{Obligation, ObligationCause};