Remove extern crate rustc_middle from rustc_const_eval.

This requires exporting the interpreter macros so they can be used with
`use crate::interpret::*`.

Author: nnethercote

compiler/rustc_const_eval/src/const_eval/dummy_machine.rs

@@ -1,9 +1,12 @@
-use crate::interpret::{self, HasStaticRootDefId, ImmTy, Immediate, InterpCx, PointerArithmetic};
+use crate::interpret::{
+    self, throw_machine_stop, HasStaticRootDefId, ImmTy, Immediate, InterpCx, PointerArithmetic,
+};
 use rustc_middle::mir::interpret::{AllocId, ConstAllocation, InterpResult};
 use rustc_middle::mir::*;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::ty;
 use rustc_middle::ty::layout::TyAndLayout;
+use rustc_middle::{bug, span_bug};
 use rustc_span::def_id::DefId;
 
 /// Macro for machine-specific `InterpError` without allocation.

compiler/rustc_const_eval/src/const_eval/error.rs

@@ -11,6 +11,7 @@ use rustc_span::{Span, Symbol};
 
 use super::CompileTimeInterpreter;
 use crate::errors::{self, FrameNote, ReportErrorExt};
+use crate::interpret::{err_inval, err_machine_stop};
 use crate::interpret::{ErrorHandled, Frame, InterpError, InterpErrorInfo, MachineStopType};
 
 /// The CTFE machine has some custom error kinds.

compiler/rustc_const_eval/src/const_eval/eval_queries.rs

@@ -3,6 +3,7 @@ use std::sync::atomic::Ordering::Relaxed;
 use either::{Left, Right};
 
 use rustc_hir::def::DefKind;
+use rustc_middle::bug;
 use rustc_middle::mir::interpret::{AllocId, ErrorHandled, InterpErrorInfo};
 use rustc_middle::mir::{self, ConstAlloc, ConstValue};
 use rustc_middle::query::TyCtxtAt;
@@ -24,7 +25,7 @@ use crate::interpret::{
     InternKind, InterpCx, InterpError, InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking,
     StackPopCleanup,
 };
-use crate::interpret::{eval_nullary_intrinsic, InternResult};
+use crate::interpret::{eval_nullary_intrinsic, throw_exhaust, InternResult};
 use crate::CTRL_C_RECEIVED;
 
 // Returns a pointer to where the result lives

compiler/rustc_const_eval/src/const_eval/machine.rs

@@ -10,6 +10,7 @@ use rustc_hir::def::DefKind;
 use rustc_hir::def_id::DefId;
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::LangItem;
+use rustc_middle::bug;
 use rustc_middle::mir;
 use rustc_middle::mir::AssertMessage;
 use rustc_middle::query::TyCtxtAt;
@@ -24,8 +25,9 @@ use rustc_target::spec::abi::Abi as CallAbi;
 use crate::errors::{LongRunning, LongRunningWarn};
 use crate::fluent_generated as fluent;
 use crate::interpret::{
-    self, compile_time_machine, AllocId, AllocRange, ConstAllocation, CtfeProvenance, FnArg, FnVal,
-    Frame, ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, Pointer, PointerArithmetic, Scalar,
+    self, compile_time_machine, err_ub, throw_exhaust, throw_inval, throw_ub_custom,
+    throw_unsup_format, AllocId, AllocRange, ConstAllocation, CtfeProvenance, FnArg, FnVal, Frame,
+    ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, Pointer, PointerArithmetic, Scalar,
 };
 
 use super::error::*;

compiler/rustc_const_eval/src/const_eval/mod.rs

@@ -1,5 +1,6 @@
 // Not in interpret to make sure we do not use private implementation details
 
+use rustc_middle::bug;
 use rustc_middle::mir;
 use rustc_middle::mir::interpret::InterpErrorInfo;
 use rustc_middle::query::{Key, TyCtxtAt};

compiler/rustc_const_eval/src/const_eval/valtrees.rs

@@ -1,4 +1,5 @@
 use rustc_data_structures::stack::ensure_sufficient_stack;
+use rustc_middle::bug;
 use rustc_middle::mir;
 use rustc_middle::mir::interpret::{EvalToValTreeResult, GlobalId};
 use rustc_middle::ty::layout::{LayoutCx, LayoutOf, TyAndLayout};

compiler/rustc_const_eval/src/interpret/cast.rs

@@ -7,11 +7,13 @@ use rustc_middle::mir::CastKind;
 use rustc_middle::ty::adjustment::PointerCoercion;
 use rustc_middle::ty::layout::{IntegerExt, LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, FloatTy, Ty};
+use rustc_middle::{bug, span_bug};
 use rustc_target::abi::Integer;
 use rustc_type_ir::TyKind::*;
 
 use super::{
-    util::ensure_monomorphic_enough, FnVal, ImmTy, Immediate, InterpCx, Machine, OpTy, PlaceTy,
+    err_inval, throw_ub, throw_ub_custom, util::ensure_monomorphic_enough, FnVal, ImmTy, Immediate,
+    InterpCx, Machine, OpTy, PlaceTy,
 };
 
 use crate::fluent_generated as fluent;

compiler/rustc_const_eval/src/interpret/discriminant.rs

@@ -1,12 +1,15 @@
 //! Functions for reading and writing discriminants of multi-variant layouts (enums and coroutines).
 
 use rustc_middle::mir;
+use rustc_middle::span_bug;
 use rustc_middle::ty::layout::{LayoutOf, PrimitiveExt};
 use rustc_middle::ty::{self, ScalarInt, Ty};
 use rustc_target::abi::{self, TagEncoding};
 use rustc_target::abi::{VariantIdx, Variants};
 
-use super::{ImmTy, InterpCx, InterpResult, Machine, Readable, Scalar, Writeable};
+use super::{
+    err_ub, throw_ub, ImmTy, InterpCx, InterpResult, Machine, Readable, Scalar, Writeable,
+};
 
 impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
     /// Writes the discriminant of the given variant.

compiler/rustc_const_eval/src/interpret/eval_context.rs

@@ -17,15 +17,17 @@ use rustc_middle::ty::layout::{
     TyAndLayout,
 };
 use rustc_middle::ty::{self, GenericArgsRef, ParamEnv, Ty, TyCtxt, TypeFoldable, Variance};
+use rustc_middle::{bug, span_bug};
 use rustc_mir_dataflow::storage::always_storage_live_locals;
 use rustc_session::Limit;
 use rustc_span::Span;
 use rustc_target::abi::{call::FnAbi, Align, HasDataLayout, Size, TargetDataLayout};
 
 use super::{
-    GlobalId, Immediate, InterpErrorInfo, InterpResult, MPlaceTy, Machine, MemPlace, MemPlaceMeta,
-    Memory, MemoryKind, OpTy, Operand, Place, PlaceTy, Pointer, PointerArithmetic, Projectable,
-    Provenance, Scalar, StackPopJump,
+    err_inval, throw_inval, throw_ub, throw_ub_custom, throw_unsup, GlobalId, Immediate,
+    InterpErrorInfo, InterpResult, MPlaceTy, Machine, MemPlace, MemPlaceMeta, Memory, MemoryKind,
+    OpTy, Operand, Place, PlaceTy, Pointer, PointerArithmetic, Projectable, Provenance, Scalar,
+    StackPopJump,
 };
 use crate::errors;
 use crate::util;

compiler/rustc_const_eval/src/interpret/intern.rs

@@ -24,7 +24,7 @@ use rustc_middle::ty::layout::TyAndLayout;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::sym;
 
-use super::{AllocId, Allocation, InterpCx, MPlaceTy, Machine, MemoryKind, PlaceTy};
+use super::{err_ub, AllocId, Allocation, InterpCx, MPlaceTy, Machine, MemoryKind, PlaceTy};
 use crate::const_eval;
 use crate::errors::NestedStaticInThreadLocal;