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Treat booleans as integers with valid range 0..=1

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This commit is contained in:
Oliver Scherer 2020-10-02 14:19:52 +02:00 committed by Nadrieril
parent 99852e0db6
commit 3708c86de1
1 changed files with 3 additions and 4 deletions
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7
compiler/rustc_mir_build/src/thir/pattern/_match.rs
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@ -1485,9 +1485,7 @@ fn all_constructors<'a, 'tcx>(
)
};
match *pcx.ty.kind() {
ty::Bool => {
[true, false].iter().map(|&b| ConstantValue(ty::Const::from_bool(cx.tcx, b))).collect()
}
ty::Bool => vec![make_range(0, 1)],
ty::Array(ref sub_ty, len) if len.try_eval_usize(cx.tcx, cx.param_env).is_some() => {
let len = len.eval_usize(cx.tcx, cx.param_env);
if len != 0 && cx.is_uninhabited(sub_ty) {
@ -1600,7 +1598,7 @@ impl<'tcx> IntRange<'tcx> {
#[inline]
fn is_integral(ty: Ty<'_>) -> bool {
match ty.kind() {
ty::Char | ty::Int(_) | ty::Uint(_) => true,
ty::Char | ty::Int(_) | ty::Uint(_) | ty::Bool => true,
_ => false,
}
}
@ -1622,6 +1620,7 @@ impl<'tcx> IntRange<'tcx> {
#[inline]
fn integral_size_and_signed_bias(tcx: TyCtxt<'tcx>, ty: Ty<'_>) -> Option<(Size, u128)> {
match *ty.kind() {
ty::Bool => Some((Size::from_bytes(1), 0)),
ty::Char => Some((Size::from_bytes(4), 0)),
ty::Int(ity) => {
let size = Integer::from_attr(&tcx, SignedInt(ity)).size();