Rollup of 7 pull requests

Cargo.lock

@@ -2760,7 +2760,7 @@ dependencies = [
  "tabled",
  "tar",
  "tempfile",
- "xz",
+ "xz2",
  "zip",
 ]
 
@@ -6586,15 +6586,6 @@ dependencies = [
  "rustix",
 ]
 
-[[package]]
-name = "xz"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c887690ff2a2e233e8e49633461521f98ec57fbff9d59a884c9a4f04ec1da34"
-dependencies = [
- "xz2",
-]
-
 [[package]]
 name = "xz2"
 version = "0.1.7"

compiler/rustc_borrowck/src/renumber.rs

@@ -26,9 +26,7 @@ pub fn renumber_mir<'tcx>(
     renumberer.visit_body(body);
 }
 
-// FIXME(@lcnr): A lot of these variants overlap and it seems like
-// this type is only used to decide which region should be used
-// as representative. This should be cleaned up.
+// The fields are used only for debugging output in `sccs_info`.
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
 pub(crate) enum RegionCtxt {
     Location(Location),

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;
 

compiler/rustc_const_eval/src/interpret/intrinsics.rs

@@ -8,16 +8,18 @@ use rustc_middle::ty::layout::{LayoutOf as _, ValidityRequirement};
 use rustc_middle::ty::GenericArgsRef;
 use rustc_middle::ty::{Ty, TyCtxt};
 use rustc_middle::{
+    bug,
     mir::{self, BinOp, ConstValue, NonDivergingIntrinsic},
     ty::layout::TyAndLayout,
 };
 use rustc_span::symbol::{sym, Symbol};
 use rustc_target::abi::Size;
 
 use super::{
-    memory::MemoryKind, util::ensure_monomorphic_enough, Allocation, CheckInAllocMsg,
-    ConstAllocation, GlobalId, ImmTy, InterpCx, InterpResult, MPlaceTy, Machine, OpTy, Pointer,
-    PointerArithmetic, Scalar,
+    err_inval, err_ub_custom, err_unsup_format, memory::MemoryKind, throw_inval, throw_ub_custom,
+    throw_ub_format, util::ensure_monomorphic_enough, Allocation, CheckInAllocMsg, ConstAllocation,
+    GlobalId, ImmTy, InterpCx, InterpResult, MPlaceTy, Machine, OpTy, Pointer, PointerArithmetic,
+    Scalar,
 };
 
 use crate::fluent_generated as fluent;

compiler/rustc_const_eval/src/interpret/machine.rs

@@ -18,9 +18,9 @@ use rustc_target::abi::{Align, Size};
 use rustc_target::spec::abi::Abi as CallAbi;
 
 use super::{
-    AllocBytes, AllocId, AllocKind, AllocRange, Allocation, ConstAllocation, CtfeProvenance, FnArg,
-    Frame, ImmTy, InterpCx, InterpResult, MPlaceTy, MemoryKind, Misalignment, OpTy, PlaceTy,
-    Pointer, Provenance,
+    throw_unsup, throw_unsup_format, AllocBytes, AllocId, AllocKind, AllocRange, Allocation,
+    ConstAllocation, CtfeProvenance, FnArg, Frame, ImmTy, InterpCx, InterpResult, MPlaceTy,
+    MemoryKind, Misalignment, OpTy, PlaceTy, Pointer, Provenance,
 };
 
 /// Data returned by Machine::stack_pop,

compiler/rustc_const_eval/src/interpret/memory.rs

@@ -16,16 +16,18 @@ use std::ptr;
 use rustc_ast::Mutability;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
 use rustc_hir::def::DefKind;
+use rustc_middle::bug;
 use rustc_middle::mir::display_allocation;
 use rustc_middle::ty::{self, Instance, ParamEnv, Ty, TyCtxt};
 use rustc_target::abi::{Align, HasDataLayout, Size};
 
 use crate::fluent_generated as fluent;
 
 use super::{
-    alloc_range, AllocBytes, AllocId, AllocMap, AllocRange, Allocation, CheckAlignMsg,
-    CheckInAllocMsg, CtfeProvenance, GlobalAlloc, InterpCx, InterpResult, Machine, MayLeak,
-    Misalignment, Pointer, PointerArithmetic, Provenance, Scalar,
+    alloc_range, err_ub, err_ub_custom, throw_ub, throw_ub_custom, throw_unsup, throw_unsup_format,
+    AllocBytes, AllocId, AllocMap, AllocRange, Allocation, CheckAlignMsg, CheckInAllocMsg,
+    CtfeProvenance, GlobalAlloc, InterpCx, InterpResult, Machine, MayLeak, Misalignment, Pointer,
+    PointerArithmetic, Provenance, Scalar,
 };
 
 #[derive(Debug, PartialEq, Copy, Clone)]

compiler/rustc_const_eval/src/interpret/operand.rs

@@ -10,13 +10,14 @@ use rustc_middle::mir::interpret::ScalarSizeMismatch;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::print::{FmtPrinter, PrettyPrinter};
 use rustc_middle::ty::{ConstInt, ScalarInt, Ty, TyCtxt};
+use rustc_middle::{bug, span_bug};
 use rustc_middle::{mir, ty};
 use rustc_target::abi::{self, Abi, HasDataLayout, Size};
 
 use super::{
-    alloc_range, from_known_layout, mir_assign_valid_types, CtfeProvenance, InterpCx, InterpResult,
-    MPlaceTy, Machine, MemPlace, MemPlaceMeta, OffsetMode, PlaceTy, Pointer, Projectable,
-    Provenance, Scalar,
+    alloc_range, err_ub, from_known_layout, mir_assign_valid_types, throw_ub, CtfeProvenance,
+    InterpCx, InterpResult, MPlaceTy, Machine, MemPlace, MemPlaceMeta, OffsetMode, PlaceTy,
+    Pointer, Projectable, Provenance, Scalar,
 };
 
 /// An `Immediate` represents a single immediate self-contained Rust value.

compiler/rustc_const_eval/src/interpret/operator.rs

@@ -3,10 +3,11 @@ use rustc_middle::mir;
 use rustc_middle::mir::interpret::{InterpResult, Scalar};
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, FloatTy, ScalarInt, Ty};
+use rustc_middle::{bug, span_bug};
 use rustc_span::symbol::sym;
 use rustc_target::abi::Abi;
 
-use super::{ImmTy, Immediate, InterpCx, Machine, PlaceTy};
+use super::{err_ub, throw_ub, throw_ub_custom, ImmTy, Immediate, InterpCx, Machine, PlaceTy};
 
 use crate::fluent_generated as fluent;
 

compiler/rustc_const_eval/src/interpret/place.rs

@@ -11,12 +11,14 @@ use rustc_middle::mir;
 use rustc_middle::ty;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::Ty;
+use rustc_middle::{bug, span_bug};
 use rustc_target::abi::{Abi, Align, HasDataLayout, Size};
 
 use super::{
-    alloc_range, mir_assign_valid_types, AllocRef, AllocRefMut, CheckAlignMsg, CtfeProvenance,
-    ImmTy, Immediate, InterpCx, InterpResult, Machine, MemoryKind, Misalignment, OffsetMode, OpTy,
-    Operand, Pointer, PointerArithmetic, Projectable, Provenance, Readable, Scalar,
+    alloc_range, mir_assign_valid_types, throw_ub, AllocRef, AllocRefMut, CheckAlignMsg,
+    CtfeProvenance, ImmTy, Immediate, InterpCx, InterpResult, Machine, MemoryKind, Misalignment,
+    OffsetMode, OpTy, Operand, Pointer, PointerArithmetic, Projectable, Provenance, Readable,
+    Scalar,
 };
 
 #[derive(Copy, Clone, Hash, PartialEq, Eq, Debug)]

compiler/rustc_const_eval/src/interpret/projection.rs

@@ -14,10 +14,14 @@ use rustc_middle::mir;
 use rustc_middle::ty;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::Ty;
+use rustc_middle::{bug, span_bug};
 use rustc_target::abi::Size;
 use rustc_target::abi::{self, VariantIdx};
 
-use super::{InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy, Provenance, Scalar};
+use super::{
+    throw_ub, throw_unsup_format, InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy,
+    Provenance, Scalar,
+};
 
 /// Describes the constraints placed on offset-projections.
 #[derive(Copy, Clone, Debug)]

compiler/rustc_const_eval/src/interpret/step.rs

@@ -7,6 +7,7 @@ use either::Either;
 use rustc_index::IndexSlice;
 use rustc_middle::mir;
 use rustc_middle::ty::layout::LayoutOf;
+use rustc_middle::{bug, span_bug};
 use rustc_target::abi::{FieldIdx, FIRST_VARIANT};
 
 use super::{

compiler/rustc_const_eval/src/interpret/terminator.rs

@@ -2,6 +2,7 @@ use std::borrow::Cow;
 
 use either::Either;
 
+use rustc_middle::span_bug;
 use rustc_middle::{
     mir,
     ty::{
@@ -19,8 +20,9 @@ use rustc_target::abi::{
 use rustc_target::spec::abi::Abi;
 
 use super::{
-    CtfeProvenance, FnVal, ImmTy, InterpCx, InterpResult, MPlaceTy, Machine, OpTy, PlaceTy,
-    Projectable, Provenance, Scalar, StackPopCleanup,
+    throw_ub, throw_ub_custom, throw_unsup_format, CtfeProvenance, FnVal, ImmTy, InterpCx,
+    InterpResult, MPlaceTy, Machine, OpTy, PlaceTy, Projectable, Provenance, Scalar,
+    StackPopCleanup,
 };
 use crate::fluent_generated as fluent;
 

compiler/rustc_const_eval/src/interpret/util.rs

@@ -1,5 +1,4 @@
 use crate::const_eval::{CompileTimeEvalContext, CompileTimeInterpreter, InterpretationResult};
-use crate::interpret::{MemPlaceMeta, MemoryKind};
 use rustc_hir::def_id::LocalDefId;
 use rustc_middle::mir;
 use rustc_middle::mir::interpret::{Allocation, InterpResult, Pointer};
@@ -9,7 +8,7 @@ use rustc_middle::ty::{
 };
 use std::ops::ControlFlow;
 
-use super::{InterpCx, MPlaceTy};
+use super::{throw_inval, InterpCx, MPlaceTy, MemPlaceMeta, MemoryKind};
 
 /// Checks whether a type contains generic parameters which must be instantiated.
 ///

compiler/rustc_const_eval/src/interpret/validity.rs

@@ -13,6 +13,7 @@ use hir::def::DefKind;
 use rustc_ast::Mutability;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
+use rustc_middle::bug;
 use rustc_middle::mir::interpret::{
     ExpectedKind, InterpError, InvalidMetaKind, Misalignment, PointerKind, Provenance,
     ValidationErrorInfo, ValidationErrorKind, ValidationErrorKind::*,
@@ -27,9 +28,9 @@ use rustc_target::abi::{
 use std::hash::Hash;
 
 use super::{
-    format_interp_error, machine::AllocMap, AllocId, CheckInAllocMsg, GlobalAlloc, ImmTy,
-    Immediate, InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy, Pointer, Projectable,
-    Scalar, ValueVisitor,
+    err_ub, format_interp_error, machine::AllocMap, throw_ub, AllocId, CheckInAllocMsg,
+    GlobalAlloc, ImmTy, Immediate, InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy,
+    Pointer, Projectable, Scalar, ValueVisitor,
 };
 
 // for the validation errors

compiler/rustc_const_eval/src/interpret/visitor.rs

@@ -9,7 +9,7 @@ use rustc_target::abi::{FieldsShape, VariantIdx, Variants};
 
 use std::num::NonZero;
 
-use super::{InterpCx, MPlaceTy, Machine, Projectable};
+use super::{throw_inval, InterpCx, MPlaceTy, Machine, Projectable};
 
 /// How to traverse a value and what to do when we are at the leaves.
 pub trait ValueVisitor<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>>: Sized {

compiler/rustc_const_eval/src/lib.rs

@@ -22,8 +22,6 @@ Rust MIR: a lowered representation of Rust.
 
 #[macro_use]
 extern crate tracing;
-#[macro_use]
-extern crate rustc_middle;
 
 pub mod const_eval;
 mod errors;

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -8,6 +8,7 @@ use rustc_infer::infer::TyCtxtInferExt;
 use rustc_infer::traits::ObligationCause;
 use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceContext, Visitor};
 use rustc_middle::mir::*;
+use rustc_middle::span_bug;
 use rustc_middle::ty::{self, adjustment::PointerCoercion, Ty, TyCtxt};
 use rustc_middle::ty::{Instance, InstanceDef, TypeVisitableExt};
 use rustc_mir_dataflow::Analysis;

compiler/rustc_const_eval/src/transform/check_consts/mod.rs

@@ -8,6 +8,7 @@ use rustc_attr as attr;
 use rustc_errors::DiagCtxt;
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
+use rustc_middle::bug;
 use rustc_middle::mir;
 use rustc_middle::ty::{self, PolyFnSig, TyCtxt};
 use rustc_span::Symbol;

compiler/rustc_const_eval/src/transform/check_consts/ops.rs

@@ -8,6 +8,7 @@ use rustc_hir::def_id::DefId;
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_infer::traits::{ImplSource, Obligation, ObligationCause};
 use rustc_middle::mir::{self, CallSource};
+use rustc_middle::span_bug;
 use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_middle::ty::{
     self, suggest_constraining_type_param, Closure, FnDef, FnPtr, GenericArgKind, GenericArgsRef,