compiler: Add rustc_abi dependence to the compiler

Depend on rustc_abi in compiler crates that use it indirectly but have
not yet taken on that dependency, and are not entangled in my other PRs.
This leaves an "excise rustc_target" step after the dust settles.

Cargo.lock

@@ -3621,6 +3621,7 @@ version = "0.0.0"
 dependencies = [
  "annotate-snippets 0.11.4",
  "derive_setters",
+ "rustc_abi",
  "rustc_ast",
  "rustc_ast_pretty",
  "rustc_data_structures",
@@ -3718,6 +3719,7 @@ name = "rustc_hir_analysis"
 version = "0.0.0"
 dependencies = [
  "itertools",
+ "rustc_abi",
  "rustc_arena",
  "rustc_ast",
  "rustc_attr",
@@ -3980,6 +3982,7 @@ dependencies = [
  "bitflags 2.6.0",
  "libloading",
  "odht",
+ "rustc_abi",
  "rustc_ast",
  "rustc_attr",
  "rustc_data_structures",
@@ -4074,6 +4077,7 @@ version = "0.0.0"
 dependencies = [
  "polonius-engine",
  "regex",
+ "rustc_abi",
  "rustc_ast",
  "rustc_data_structures",
  "rustc_errors",
@@ -4187,6 +4191,7 @@ dependencies = [
 name = "rustc_passes"
 version = "0.0.0"
 dependencies = [
+ "rustc_abi",
  "rustc_ast",
  "rustc_ast_pretty",
  "rustc_attr",
@@ -4213,6 +4218,7 @@ name = "rustc_pattern_analysis"
 version = "0.0.0"
 dependencies = [
  "rustc-hash 2.0.0",
+ "rustc_abi",
  "rustc_apfloat",
  "rustc_arena",
  "rustc_data_structures",
@@ -4352,6 +4358,7 @@ dependencies = [
  "bitflags 2.6.0",
  "getopts",
  "libc",
+ "rustc_abi",
  "rustc_ast",
  "rustc_data_structures",
  "rustc_errors",
@@ -4415,6 +4422,7 @@ version = "0.0.0"
 dependencies = [
  "punycode",
  "rustc-demangle",
+ "rustc_abi",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_hir",

compiler/rustc_errors/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 # tidy-alphabetical-start
 annotate-snippets = "0.11"
 derive_setters = "0.1.6"
+rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_pretty = { path = "../rustc_ast_pretty" }
 rustc_data_structures = { path = "../rustc_data_structures" }

compiler/rustc_errors/src/diagnostic_impls.rs

@@ -5,12 +5,12 @@ use std::num::ParseIntError;
 use std::path::{Path, PathBuf};
 use std::process::ExitStatus;
 
+use rustc_abi::TargetDataLayoutErrors;
 use rustc_ast_pretty::pprust;
 use rustc_macros::Subdiagnostic;
 use rustc_span::Span;
 use rustc_span::edition::Edition;
 use rustc_span::symbol::{Ident, MacroRulesNormalizedIdent, Symbol};
-use rustc_target::abi::TargetDataLayoutErrors;
 use rustc_target::spec::{PanicStrategy, SplitDebuginfo, StackProtector, TargetTriple};
 use rustc_type_ir::{ClosureKind, FloatTy};
 use {rustc_ast as ast, rustc_hir as hir};

compiler/rustc_hir_analysis/Cargo.toml

@@ -10,6 +10,7 @@ doctest = false
 [dependencies]
 # tidy-alphabetical-start
 itertools = "0.12"
+rustc_abi = { path = "../rustc_abi" }
 rustc_arena = { path = "../rustc_arena" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_attr = { path = "../rustc_attr" }

compiler/rustc_hir_analysis/src/check/check.rs

@@ -1,6 +1,7 @@
 use std::cell::LazyCell;
 use std::ops::ControlFlow;
 
+use rustc_abi::FieldIdx;
 use rustc_data_structures::unord::{UnordMap, UnordSet};
 use rustc_errors::MultiSpan;
 use rustc_errors::codes::*;
@@ -23,7 +24,6 @@ use rustc_middle::ty::{
     TypeVisitableExt,
 };
 use rustc_session::lint::builtin::UNINHABITED_STATIC;
-use rustc_target::abi::FieldIdx;
 use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
 use rustc_trait_selection::error_reporting::traits::on_unimplemented::OnUnimplementedDirective;
 use rustc_trait_selection::traits;

compiler/rustc_hir_analysis/src/check/intrinsicck.rs

@@ -1,5 +1,6 @@
 use std::assert_matches::debug_assert_matches;
 
+use rustc_abi::FieldIdx;
 use rustc_ast::InlineAsmTemplatePiece;
 use rustc_data_structures::fx::FxIndexSet;
 use rustc_hir::{self as hir, LangItem};
@@ -8,7 +9,6 @@ use rustc_middle::ty::{self, FloatTy, IntTy, Ty, TyCtxt, TypeVisitableExt, UintT
 use rustc_session::lint;
 use rustc_span::Symbol;
 use rustc_span::def_id::LocalDefId;
-use rustc_target::abi::FieldIdx;
 use rustc_target::asm::{
     InlineAsmReg, InlineAsmRegClass, InlineAsmRegOrRegClass, InlineAsmType, ModifierInfo,
 };

compiler/rustc_hir_analysis/src/check/mod.rs

@@ -74,6 +74,7 @@ pub mod wfcheck;
 use std::num::NonZero;
 
 pub use check::{check_abi, check_abi_fn_ptr};
+use rustc_abi::VariantIdx;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
 use rustc_errors::{Diag, ErrorGuaranteed, pluralize, struct_span_code_err};
 use rustc_hir::def_id::{DefId, LocalDefId};
@@ -90,7 +91,6 @@ use rustc_session::parse::feature_err;
 use rustc_span::def_id::CRATE_DEF_ID;
 use rustc_span::symbol::{Ident, kw, sym};
 use rustc_span::{BytePos, DUMMY_SP, Span, Symbol};
-use rustc_target::abi::VariantIdx;
 use rustc_target::spec::abi::Abi;
 use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
 use rustc_trait_selection::error_reporting::infer::ObligationCauseExt as _;

compiler/rustc_metadata/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 bitflags = "2.4.1"
 libloading = "0.8.0"
 odht = { version = "0.3.1", features = ["nightly"] }
+rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_attr = { path = "../rustc_attr" }
 rustc_data_structures = { path = "../rustc_data_structures" }

compiler/rustc_metadata/src/rmeta/mod.rs

@@ -6,6 +6,7 @@ use decoder::{DecodeContext, Metadata};
 use def_path_hash_map::DefPathHashMapRef;
 use encoder::EncodeContext;
 pub use encoder::{EncodedMetadata, encode_metadata, rendered_const};
+use rustc_abi::{FieldIdx, VariantIdx};
 use rustc_ast::expand::StrippedCfgItem;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::svh::Svh;
@@ -37,7 +38,6 @@ use rustc_span::edition::Edition;
 use rustc_span::hygiene::{ExpnIndex, MacroKind, SyntaxContextData};
 use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::{self, ExpnData, ExpnHash, ExpnId, Span};
-use rustc_target::abi::{FieldIdx, VariantIdx};
 use rustc_target::spec::{PanicStrategy, TargetTriple};
 use table::TableBuilder;
 use {rustc_ast as ast, rustc_attr as attr, rustc_hir as hir};

compiler/rustc_mir_dataflow/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 # tidy-alphabetical-start
 polonius-engine = "0.13.0"
 regex = "1"
+rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }

compiler/rustc_mir_dataflow/src/drop_flag_effects.rs

@@ -1,5 +1,5 @@
+use rustc_abi::VariantIdx;
 use rustc_middle::mir::{self, Body, Location, Terminator, TerminatorKind};
-use rustc_target::abi::VariantIdx;
 use tracing::debug;
 
 use super::move_paths::{InitKind, LookupResult, MoveData, MovePathIndex};

compiler/rustc_mir_dataflow/src/elaborate_drops.rs

@@ -1,5 +1,6 @@
 use std::{fmt, iter};
 
+use rustc_abi::{FIRST_VARIANT, FieldIdx, VariantIdx};
 use rustc_hir::lang_items::LangItem;
 use rustc_index::Idx;
 use rustc_middle::mir::patch::MirPatch;
@@ -10,7 +11,6 @@ use rustc_middle::ty::util::IntTypeExt;
 use rustc_middle::ty::{self, GenericArgsRef, Ty, TyCtxt};
 use rustc_span::DUMMY_SP;
 use rustc_span::source_map::Spanned;
-use rustc_target::abi::{FIRST_VARIANT, FieldIdx, VariantIdx};
 use tracing::{debug, instrument};
 
 /// The value of an inserted drop flag.

compiler/rustc_mir_dataflow/src/value_analysis.rs

@@ -36,6 +36,7 @@ use std::assert_matches::assert_matches;
 use std::fmt::{Debug, Formatter};
 use std::ops::Range;
 
+use rustc_abi::{FieldIdx, VariantIdx};
 use rustc_data_structures::captures::Captures;
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet, StdEntry};
 use rustc_data_structures::stack::ensure_sufficient_stack;
@@ -46,7 +47,6 @@ use rustc_middle::mir::tcx::PlaceTy;
 use rustc_middle::mir::visit::{MutatingUseContext, PlaceContext, Visitor};
 use rustc_middle::mir::*;
 use rustc_middle::ty::{self, Ty, TyCtxt};
-use rustc_target::abi::{FieldIdx, VariantIdx};
 use tracing::debug;
 
 use crate::fmt::DebugWithContext;

compiler/rustc_passes/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2021"
 
 [dependencies]
 # tidy-alphabetical-start
+rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_pretty = { path = "../rustc_ast_pretty" }
 rustc_attr = { path = "../rustc_attr" }

compiler/rustc_passes/src/dead.rs

@@ -7,6 +7,7 @@ use std::mem;
 
 use hir::ItemKind;
 use hir::def_id::{LocalDefIdMap, LocalDefIdSet};
+use rustc_abi::FieldIdx;
 use rustc_data_structures::unord::UnordSet;
 use rustc_errors::MultiSpan;
 use rustc_hir as hir;
@@ -22,7 +23,6 @@ use rustc_middle::{bug, span_bug};
 use rustc_session::lint;
 use rustc_session::lint::builtin::DEAD_CODE;
 use rustc_span::symbol::{Symbol, sym};
-use rustc_target::abi::FieldIdx;
 
 use crate::errors::{
     ChangeFields, IgnoredDerivedImpls, MultipleDeadCodes, ParentInfo, UselessAssignment,

compiler/rustc_passes/src/layout_test.rs

@@ -1,3 +1,4 @@
+use rustc_abi::{HasDataLayout, TargetDataLayout};
 use rustc_ast::Attribute;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::LocalDefId;
@@ -7,7 +8,6 @@ use rustc_middle::ty::{self, ParamEnv, Ty, TyCtxt};
 use rustc_span::Span;
 use rustc_span::source_map::Spanned;
 use rustc_span::symbol::sym;
-use rustc_target::abi::{HasDataLayout, TargetDataLayout};
 use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
 use rustc_trait_selection::infer::TyCtxtInferExt;
 use rustc_trait_selection::traits;

compiler/rustc_pattern_analysis/Cargo.toml

@@ -6,6 +6,8 @@ edition = "2021"
 [dependencies]
 # tidy-alphabetical-start
 rustc-hash = "2.0.0"
+
+rustc_abi = { path = "../rustc_abi", optional = true }
 rustc_apfloat = "0.2.0"
 rustc_arena = { path = "../rustc_arena", optional = true }
 rustc_data_structures = { path = "../rustc_data_structures", optional = true }
@@ -29,6 +31,7 @@ tracing-tree = "0.3.0"
 [features]
 default = ["rustc"]
 rustc = [
+    "dep:rustc_abi",
     "dep:rustc_arena",
     "dep:rustc_data_structures",
     "dep:rustc_errors",

compiler/rustc_pattern_analysis/src/rustc.rs

@@ -1,6 +1,7 @@
 use std::fmt;
 use std::iter::once;
 
+use rustc_abi::{FIRST_VARIANT, FieldIdx, Integer, VariantIdx};
 use rustc_arena::DroplessArena;
 use rustc_hir::HirId;
 use rustc_hir::def_id::DefId;
@@ -15,7 +16,6 @@ use rustc_middle::ty::{
 use rustc_middle::{bug, span_bug};
 use rustc_session::lint;
 use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span};
-use rustc_target::abi::{FIRST_VARIANT, FieldIdx, Integer, VariantIdx};
 
 use crate::constructor::Constructor::*;
 use crate::constructor::{

compiler/rustc_pattern_analysis/src/rustc/print.rs

@@ -11,10 +11,10 @@
 
 use std::fmt;
 
+use rustc_abi::{FieldIdx, VariantIdx};
 use rustc_middle::bug;
 use rustc_middle::ty::{self, AdtDef, Ty, TyCtxt};
 use rustc_span::sym;
-use rustc_target::abi::{FieldIdx, VariantIdx};
 
 #[derive(Clone, Debug)]
 pub(crate) struct FieldPat {

compiler/rustc_session/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 # tidy-alphabetical-start
 bitflags = "2.4.1"
 getopts = "0.2"
+rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }

compiler/rustc_session/src/code_stats.rs

@@ -1,10 +1,10 @@
 use std::cmp;
 
+use rustc_abi::{Align, Size};
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lock;
 use rustc_span::Symbol;
 use rustc_span::def_id::DefId;
-use rustc_target::abi::{Align, Size};
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub struct VariantInfo {

compiler/rustc_session/src/config/cfg.rs

@@ -23,12 +23,12 @@
 use std::hash::Hash;
 use std::iter;
 
+use rustc_abi::Align;
 use rustc_ast::ast;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexSet};
 use rustc_lint_defs::BuiltinLintDiag;
 use rustc_lint_defs::builtin::EXPLICIT_BUILTIN_CFGS_IN_FLAGS;
 use rustc_span::symbol::{Symbol, sym};
-use rustc_target::abi::Align;
 use rustc_target::spec::{PanicStrategy, RelocModel, SanitizerSet, TARGETS, Target, TargetTriple};
 
 use crate::Session;

compiler/rustc_symbol_mangling/Cargo.toml

@@ -7,6 +7,8 @@ edition = "2021"
 # tidy-alphabetical-start
 punycode = "0.4.0"
 rustc-demangle = "0.1.21"
+
+rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
 rustc_hir = { path = "../rustc_hir" }

compiler/rustc_symbol_mangling/src/v0.rs

@@ -2,6 +2,7 @@ use std::fmt::Write;
 use std::iter;
 use std::ops::Range;
 
+use rustc_abi::Integer;
 use rustc_data_structures::base_n::ToBaseN;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::intern::Interned;
@@ -17,7 +18,6 @@ use rustc_middle::ty::{
     TyCtxt, TypeVisitable, TypeVisitableExt, UintTy,
 };
 use rustc_span::symbol::kw;
-use rustc_target::abi::Integer;
 use rustc_target::spec::abi::Abi;
 
 pub(super) fn mangle<'tcx>(