Auto merge of #80522 - cjgillot:borrowcrate, r=oli-obk

Split rustc_mir

The `rustc_mir` crate is the second largest in the compiler.
This PR splits it up into 5 crates:
- rustc_borrowck;
- rustc_const_eval;
- rustc_mir_dataflow;
- rustc_mir_transform;
- rustc_monomorphize.

Author: bors

Diff for: Cargo.lock

@@ -3621,6 +3621,33 @@ dependencies = [
  "rustc_span",
 ]
 
+[[package]]
+name = "rustc_borrowck"
+version = "0.0.0"
+dependencies = [
+ "either",
+ "itertools 0.9.0",
+ "polonius-engine",
+ "rustc_const_eval",
+ "rustc_data_structures",
+ "rustc_errors",
+ "rustc_graphviz",
+ "rustc_hir",
+ "rustc_index",
+ "rustc_infer",
+ "rustc_lexer",
+ "rustc_middle",
+ "rustc_mir_dataflow",
+ "rustc_serialize",
+ "rustc_session",
+ "rustc_span",
+ "rustc_target",
+ "rustc_trait_selection",
+ "rustc_traits",
+ "smallvec",
+ "tracing",
+]
+
 [[package]]
 name = "rustc_builtin_macros"
 version = "0.0.0"
@@ -3704,6 +3731,30 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "rustc_const_eval"
+version = "0.0.0"
+dependencies = [
+ "either",
+ "gsgdt",
+ "rustc_apfloat",
+ "rustc_ast",
+ "rustc_attr",
+ "rustc_data_structures",
+ "rustc_errors",
+ "rustc_hir",
+ "rustc_index",
+ "rustc_infer",
+ "rustc_macros",
+ "rustc_middle",
+ "rustc_mir_dataflow",
+ "rustc_session",
+ "rustc_span",
+ "rustc_target",
+ "rustc_trait_selection",
+ "tracing",
+]
+
 [[package]]
 name = "rustc_data_structures"
 version = "0.0.0"
@@ -3742,6 +3793,7 @@ dependencies = [
  "rustc_ast",
  "rustc_ast_pretty",
  "rustc_codegen_ssa",
+ "rustc_const_eval",
  "rustc_data_structures",
  "rustc_error_codes",
  "rustc_errors",
@@ -3752,7 +3804,6 @@ dependencies = [
  "rustc_lint",
  "rustc_metadata",
  "rustc_middle",
- "rustc_mir",
  "rustc_parse",
  "rustc_plugin_impl",
  "rustc_save_analysis",
@@ -3911,9 +3962,11 @@ dependencies = [
  "rustc_ast_lowering",
  "rustc_ast_passes",
  "rustc_attr",
+ "rustc_borrowck",
  "rustc_builtin_macros",
  "rustc_codegen_llvm",
  "rustc_codegen_ssa",
+ "rustc_const_eval",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_expand",
@@ -3922,8 +3975,9 @@ dependencies = [
  "rustc_lint",
  "rustc_metadata",
  "rustc_middle",
- "rustc_mir",
  "rustc_mir_build",
+ "rustc_mir_transform",
+ "rustc_monomorphize",
  "rustc_parse",
  "rustc_passes",
  "rustc_plugin_impl",
@@ -4041,6 +4095,8 @@ version = "0.0.0"
 dependencies = [
  "bitflags",
  "chalk-ir",
+ "either",
+ "gsgdt",
  "polonius-engine",
  "rustc-rayon-core",
  "rustc_apfloat",
@@ -4050,6 +4106,7 @@ dependencies = [
  "rustc_data_structures",
  "rustc_errors",
  "rustc_feature",
+ "rustc_graphviz",
  "rustc_hir",
  "rustc_index",
  "rustc_macros",
@@ -4064,51 +4121,63 @@ dependencies = [
 ]
 
 [[package]]
-name = "rustc_mir"
+name = "rustc_mir_build"
 version = "0.0.0"
 dependencies = [
- "coverage_test_macros",
- "either",
- "gsgdt",
- "itertools 0.9.0",
- "polonius-engine",
- "regex",
  "rustc_apfloat",
+ "rustc_arena",
  "rustc_ast",
  "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_graphviz",
  "rustc_hir",
  "rustc_index",
  "rustc_infer",
- "rustc_lexer",
- "rustc_macros",
  "rustc_middle",
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
  "rustc_target",
  "rustc_trait_selection",
- "rustc_traits",
  "smallvec",
  "tracing",
 ]
 
 [[package]]
-name = "rustc_mir_build"
+name = "rustc_mir_dataflow"
 version = "0.0.0"
 dependencies = [
- "rustc_apfloat",
- "rustc_arena",
+ "polonius-engine",
+ "regex",
+ "rustc_ast",
+ "rustc_data_structures",
+ "rustc_graphviz",
+ "rustc_hir",
+ "rustc_index",
+ "rustc_middle",
+ "rustc_serialize",
+ "rustc_session",
+ "rustc_span",
+ "rustc_target",
+ "smallvec",
+ "tracing",
+]
+
+[[package]]
+name = "rustc_mir_transform"
+version = "0.0.0"
+dependencies = [
+ "coverage_test_macros",
+ "itertools 0.9.0",
  "rustc_ast",
  "rustc_attr",
+ "rustc_const_eval",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_hir",
  "rustc_index",
- "rustc_infer",
  "rustc_middle",
+ "rustc_mir_dataflow",
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
@@ -4118,6 +4187,22 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "rustc_monomorphize"
+version = "0.0.0"
+dependencies = [
+ "rustc_data_structures",
+ "rustc_errors",
+ "rustc_hir",
+ "rustc_index",
+ "rustc_middle",
+ "rustc_session",
+ "rustc_span",
+ "rustc_target",
+ "smallvec",
+ "tracing",
+]
+
 [[package]]
 name = "rustc_parse"
 version = "0.0.0"

Diff for: compiler/rustc_mir/Cargo.toml renamed to compiler/rustc_borrowck/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "rustc_mir"
+name = "rustc_borrowck"
 version = "0.0.0"
 edition = "2018"
 
@@ -8,30 +8,23 @@ doctest = false
 
 [dependencies]
 either = "1.5.0"
-rustc_graphviz = { path = "../rustc_graphviz" }
-gsgdt = "0.1.2"
 itertools = "0.9"
 tracing = "0.1"
 polonius-engine = "0.13.0"
-regex = "1"
-rustc_middle = { path = "../rustc_middle" }
-rustc_attr = { path = "../rustc_attr" }
+smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
+rustc_graphviz = { path = "../rustc_graphviz" }
 rustc_hir = { path = "../rustc_hir" }
 rustc_index = { path = "../rustc_index" }
 rustc_infer = { path = "../rustc_infer" }
 rustc_lexer = { path = "../rustc_lexer" }
-rustc_macros = { path = "../rustc_macros" }
+rustc_middle = { path = "../rustc_middle" }
+rustc_const_eval = { path = "../rustc_const_eval" }
+rustc_mir_dataflow = { path = "../rustc_mir_dataflow" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_session = { path = "../rustc_session" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_traits = { path = "../rustc_traits" }
-rustc_ast = { path = "../rustc_ast" }
 rustc_span = { path = "../rustc_span" }
-rustc_apfloat = { path = "../rustc_apfloat" }
-smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
-
-[dev-dependencies]
-coverage_test_macros = { path = "src/transform/coverage/test_macros" }

Diff for: compiler/rustc_mir/src/borrow_check/borrow_set.rs renamed to compiler/rustc_borrowck/src/borrow_set.rs

@@ -1,14 +1,14 @@
-use crate::borrow_check::nll::ToRegionVid;
-use crate::borrow_check::path_utils::allow_two_phase_borrow;
-use crate::borrow_check::place_ext::PlaceExt;
-use crate::dataflow::indexes::BorrowIndex;
-use crate::dataflow::move_paths::MoveData;
+use crate::nll::ToRegionVid;
+use crate::path_utils::allow_two_phase_borrow;
+use crate::place_ext::PlaceExt;
+use crate::BorrowIndex;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap};
 use rustc_index::bit_set::BitSet;
 use rustc_middle::mir::traversal;
 use rustc_middle::mir::visit::{MutatingUseContext, NonUseContext, PlaceContext, Visitor};
 use rustc_middle::mir::{self, Body, Local, Location};
 use rustc_middle::ty::{RegionVid, TyCtxt};
+use rustc_mir_dataflow::move_paths::MoveData;
 use std::fmt;
 use std::ops::Index;
 

Diff for: compiler/rustc_mir/src/util/borrowck_errors.rs renamed to compiler/rustc_borrowck/src/borrowck_errors.rs

@@ -2,7 +2,7 @@ use rustc_errors::{struct_span_err, DiagnosticBuilder, DiagnosticId};
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_span::{MultiSpan, Span};
 
-impl<'cx, 'tcx> crate::borrow_check::MirBorrowckCtxt<'cx, 'tcx> {
+impl<'cx, 'tcx> crate::MirBorrowckCtxt<'cx, 'tcx> {
     crate fn cannot_move_when_borrowed(&self, span: Span, desc: &str) -> DiagnosticBuilder<'cx> {
         struct_span_err!(self, span, E0505, "cannot move out of {} because it is borrowed", desc,)
     }

Diff for: compiler/rustc_mir/src/borrow_check/constraint_generation.rs renamed to compiler/rustc_borrowck/src/constraint_generation.rs

@@ -9,7 +9,7 @@ use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::subst::SubstsRef;
 use rustc_middle::ty::{self, RegionVid, Ty};
 
-use crate::borrow_check::{
+use crate::{
     borrow_set::BorrowSet, facts::AllFacts, location::LocationTable, nll::ToRegionVid,
     places_conflict, region_infer::values::LivenessValues,
 };

Diff for: compiler/rustc_mir/src/borrow_check/constraints/graph.rs renamed to compiler/rustc_borrowck/src/constraints/graph.rs

@@ -4,7 +4,7 @@ use rustc_middle::mir::ConstraintCategory;
 use rustc_middle::ty::{RegionVid, VarianceDiagInfo};
 use rustc_span::DUMMY_SP;
 
-use crate::borrow_check::{
+use crate::{
     constraints::OutlivesConstraintIndex,
     constraints::{OutlivesConstraint, OutlivesConstraintSet},
     type_check::Locations,

Diff for: compiler/rustc_mir/src/borrow_check/constraints/mod.rs renamed to compiler/rustc_borrowck/src/constraints/mod.rs

@@ -5,7 +5,7 @@ use rustc_middle::ty::{RegionVid, VarianceDiagInfo};
 use std::fmt;
 use std::ops::Index;
 
-use crate::borrow_check::type_check::Locations;
+use crate::type_check::Locations;
 
 crate mod graph;