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//! `TypeFoldable` implementations for MIR types
use super::*;
use crate::ty;
use rustc_data_structures::functor::IdFunctor;
TrivialTypeTraversalAndLiftImpls! {
BlockTailInfo,
MirPhase,
SourceInfo,
FakeReadCause,
RetagKind,
SourceScope,
SourceScopeLocalData,
UserTypeAnnotationIndex,
}
impl<'tcx> TypeFoldable<'tcx> for Terminator<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
use crate::mir::TerminatorKind::*;
let kind = match self.kind {
Goto { target } => Goto { target },
SwitchInt { discr, switch_ty, targets } => SwitchInt {
discr: discr.try_fold_with(folder)?,
switch_ty: switch_ty.try_fold_with(folder)?,
targets,
},
Drop { place, target, unwind } => {
Drop { place: place.try_fold_with(folder)?, target, unwind }
}
DropAndReplace { place, value, target, unwind } => DropAndReplace {
place: place.try_fold_with(folder)?,
value: value.try_fold_with(folder)?,
target,
unwind,
},
Yield { value, resume, resume_arg, drop } => Yield {
value: value.try_fold_with(folder)?,
resume,
resume_arg: resume_arg.try_fold_with(folder)?,
drop,
},
Call { func, args, destination, target, cleanup, from_hir_call, fn_span } => Call {
func: func.try_fold_with(folder)?,
args: args.try_fold_with(folder)?,
destination: destination.try_fold_with(folder)?,
target,
cleanup,
from_hir_call,
fn_span,
},
Assert { cond, expected, msg, target, cleanup } => {
use AssertKind::*;
let msg = match msg {
BoundsCheck { len, index } => BoundsCheck {
len: len.try_fold_with(folder)?,
index: index.try_fold_with(folder)?,
},
Overflow(op, l, r) => {
Overflow(op, l.try_fold_with(folder)?, r.try_fold_with(folder)?)
}
OverflowNeg(op) => OverflowNeg(op.try_fold_with(folder)?),
DivisionByZero(op) => DivisionByZero(op.try_fold_with(folder)?),
RemainderByZero(op) => RemainderByZero(op.try_fold_with(folder)?),
ResumedAfterReturn(_) | ResumedAfterPanic(_) => msg,
};
Assert { cond: cond.try_fold_with(folder)?, expected, msg, target, cleanup }
}
GeneratorDrop => GeneratorDrop,
Resume => Resume,
Abort => Abort,
Return => Return,
Unreachable => Unreachable,
FalseEdge { real_target, imaginary_target } => {
FalseEdge { real_target, imaginary_target }
}
FalseUnwind { real_target, unwind } => FalseUnwind { real_target, unwind },
InlineAsm { template, operands, options, line_spans, destination, cleanup } => {
InlineAsm {
template,
operands: operands.try_fold_with(folder)?,
options,
line_spans,
destination,
cleanup,
}
}
};
Ok(Terminator { source_info: self.source_info, kind })
}
}
impl<'tcx> TypeFoldable<'tcx> for GeneratorKind {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _: &mut F) -> Result<Self, F::Error> {
Ok(self)
}
}
impl<'tcx> TypeFoldable<'tcx> for Place<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
Ok(Place {
local: self.local.try_fold_with(folder)?,
projection: self.projection.try_fold_with(folder)?,
})
}
}
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<PlaceElem<'tcx>> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
ty::util::fold_list(self, folder, |tcx, v| tcx.intern_place_elems(v))
}
}
impl<'tcx> TypeFoldable<'tcx> for Rvalue<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
use crate::mir::Rvalue::*;
Ok(match self {
Use(op) => Use(op.try_fold_with(folder)?),
Repeat(op, len) => Repeat(op.try_fold_with(folder)?, len.try_fold_with(folder)?),
ThreadLocalRef(did) => ThreadLocalRef(did.try_fold_with(folder)?),
Ref(region, bk, place) => {
Ref(region.try_fold_with(folder)?, bk, place.try_fold_with(folder)?)
}
CopyForDeref(place) => CopyForDeref(place.try_fold_with(folder)?),
AddressOf(mutability, place) => AddressOf(mutability, place.try_fold_with(folder)?),
Len(place) => Len(place.try_fold_with(folder)?),
Cast(kind, op, ty) => Cast(kind, op.try_fold_with(folder)?, ty.try_fold_with(folder)?),
BinaryOp(op, box (rhs, lhs)) => {
BinaryOp(op, Box::new((rhs.try_fold_with(folder)?, lhs.try_fold_with(folder)?)))
}
CheckedBinaryOp(op, box (rhs, lhs)) => CheckedBinaryOp(
op,
Box::new((rhs.try_fold_with(folder)?, lhs.try_fold_with(folder)?)),
),
UnaryOp(op, val) => UnaryOp(op, val.try_fold_with(folder)?),
Discriminant(place) => Discriminant(place.try_fold_with(folder)?),
NullaryOp(op, ty) => NullaryOp(op, ty.try_fold_with(folder)?),
Aggregate(kind, fields) => {
let kind = kind.try_map_id(|kind| {
Ok(match kind {
AggregateKind::Array(ty) => AggregateKind::Array(ty.try_fold_with(folder)?),
AggregateKind::Tuple => AggregateKind::Tuple,
AggregateKind::Adt(def, v, substs, user_ty, n) => AggregateKind::Adt(
def,
v,
substs.try_fold_with(folder)?,
user_ty.try_fold_with(folder)?,
n,
),
AggregateKind::Closure(id, substs) => {
AggregateKind::Closure(id, substs.try_fold_with(folder)?)
}
AggregateKind::Generator(id, substs, movablity) => {
AggregateKind::Generator(id, substs.try_fold_with(folder)?, movablity)
}
})
})?;
Aggregate(kind, fields.try_fold_with(folder)?)
}
ShallowInitBox(op, ty) => {
ShallowInitBox(op.try_fold_with(folder)?, ty.try_fold_with(folder)?)
}
})
}
}
impl<'tcx> TypeFoldable<'tcx> for Operand<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
Ok(match self {
Operand::Copy(place) => Operand::Copy(place.try_fold_with(folder)?),
Operand::Move(place) => Operand::Move(place.try_fold_with(folder)?),
Operand::Constant(c) => Operand::Constant(c.try_fold_with(folder)?),
})
}
}
impl<'tcx> TypeFoldable<'tcx> for PlaceElem<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
use crate::mir::ProjectionElem::*;
Ok(match self {
Deref => Deref,
Field(f, ty) => Field(f, ty.try_fold_with(folder)?),
Index(v) => Index(v.try_fold_with(folder)?),
Downcast(symbol, variantidx) => Downcast(symbol, variantidx),
ConstantIndex { offset, min_length, from_end } => {
ConstantIndex { offset, min_length, from_end }
}
Subslice { from, to, from_end } => Subslice { from, to, from_end },
})
}
}
impl<'tcx> TypeFoldable<'tcx> for Field {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _: &mut F) -> Result<Self, F::Error> {
Ok(self)
}
}
impl<'tcx> TypeFoldable<'tcx> for GeneratorSavedLocal {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _: &mut F) -> Result<Self, F::Error> {
Ok(self)
}
}
impl<'tcx, R: Idx, C: Idx> TypeFoldable<'tcx> for BitMatrix<R, C> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _: &mut F) -> Result<Self, F::Error> {
Ok(self)
}
}
impl<'tcx> TypeFoldable<'tcx> for Constant<'tcx> {
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
Ok(Constant {
span: self.span,
user_ty: self.user_ty.try_fold_with(folder)?,
literal: self.literal.try_fold_with(folder)?,
})
}
}
impl<'tcx> TypeFoldable<'tcx> for ConstantKind<'tcx> {
#[inline(always)]
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
folder.try_fold_mir_const(self)
}
}
impl<'tcx> TypeSuperFoldable<'tcx> for ConstantKind<'tcx> {
fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>(
self,
folder: &mut F,
) -> Result<Self, F::Error> {
match self {
ConstantKind::Ty(c) => Ok(ConstantKind::Ty(c.try_fold_with(folder)?)),
ConstantKind::Val(v, t) => Ok(ConstantKind::Val(v, t.try_fold_with(folder)?)),
}
}
}
|
