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Replace Scalar::zst with a Scalar::ZST constant

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This commit is contained in:
oli 2020-11-01 17:04:13 +00:00
parent b8751c1fbb
commit 8282d526e0
5 changed files with 7 additions and 10 deletions
compiler
rustc_middle/src
mir/interpret
value.rs
ty
consts.rscontext.rs
rustc_mir/src
const_eval
eval_queries.rs
interpret
operand.rs

5
compiler/rustc_middle/src/mir/interpret/value.rs
View file

@ -178,10 +178,7 @@ impl<'tcx, Tag> Scalar<Tag> {
Scalar::Int(ScalarInt::null(cx.data_layout().pointer_size))
}
#[inline]
pub fn zst() -> Self {
Scalar::Int(ScalarInt::ZST)
}
pub const ZST: Self = Scalar::Int(ScalarInt::ZST);
#[inline(always)]
fn ptr_op(

2
compiler/rustc_middle/src/ty/consts.rs
View file

@ -132,7 +132,7 @@ impl<'tcx> Const<'tcx> {
#[inline]
/// Creates an interned zst constant.
pub fn zero_sized(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> &'tcx Self {
Self::from_scalar(tcx, Scalar::zst(), ty)
Self::from_scalar(tcx, Scalar::ZST, ty)
}
#[inline]

2
compiler/rustc_middle/src/ty/context.rs
View file

@ -844,7 +844,7 @@ impl<'tcx> CommonConsts<'tcx> {
CommonConsts {
unit: mk_const(ty::Const {
val: ty::ConstKind::Value(ConstValue::Scalar(Scalar::zst())),
val: ty::ConstKind::Value(ConstValue::Scalar(Scalar::ZST)),
ty: types.unit,
}),
}

2
compiler/rustc_mir/src/const_eval/eval_queries.rs
View file

@ -146,7 +146,7 @@ pub(super) fn op_to_const<'tcx>(
"this MPlaceTy must come from a validated constant, thus we can assume the \
alignment is correct",
);
ConstValue::Scalar(Scalar::zst())
ConstValue::Scalar(Scalar::ZST)
}
};
match immediate {

6
compiler/rustc_mir/src/interpret/operand.rs
View file

@ -259,7 +259,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
return Ok(Some(ImmTy {
// zero-sized type
imm: Scalar::zst().into(),
imm: Scalar::ZST.into(),
layout: mplace.layout,
}));
}
@ -358,7 +358,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
let field_layout = op.layout.field(self, field)?;
if field_layout.is_zst() {
let immediate = Scalar::zst().into();
let immediate = Scalar::ZST.into();
return Ok(OpTy { op: Operand::Immediate(immediate), layout: field_layout });
}
let offset = op.layout.fields.offset(field);
@ -443,7 +443,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
let layout = self.layout_of_local(frame, local, layout)?;
let op = if layout.is_zst() {
// Do not read from ZST, they might not be initialized
Operand::Immediate(Scalar::zst().into())
Operand::Immediate(Scalar::ZST.into())
} else {
M::access_local(&self, frame, local)?
};