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compiler: Add is_uninhabited and use LayoutS accessors

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This reduces the need of the compiler to peek on the fields of LayoutS.
This commit is contained in:
Jubilee Young 2024-10-27 21:34:49 -07:00
parent 5f5c243ca0
commit 88a9edc091
20 changed files with 40 additions and 37 deletions
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6
compiler/rustc_ty_utils/src/layout/invariant.rs
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@ -10,7 +10,7 @@ pub(super) fn partially_check_layout<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLa
// Type-level uninhabitedness should always imply ABI uninhabitedness.
if layout.ty.is_privately_uninhabited(tcx, cx.param_env) {
assert!(layout.abi.is_uninhabited());
assert!(layout.is_uninhabited());
}
if layout.size.bytes() % layout.align.abi.bytes() != 0 {
@ -262,9 +262,7 @@ pub(super) fn partially_check_layout<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLa
)
}
// Skip empty variants.
if variant.size == Size::ZERO
|| variant.fields.count() == 0
|| variant.abi.is_uninhabited()
if variant.size == Size::ZERO || variant.fields.count() == 0 || variant.is_uninhabited()
{
// These are never actually accessed anyway, so we can skip the coherence check
// for them. They also fail that check, since they have