bjoernager/rust
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Actually create ranged int types in the type system.

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This commit is contained in:
Oli Scherer 2023-02-02 13:57:36 +00:00
parent 6b24a9cf70
commit 84acfe86de
97 changed files with 1208 additions and 77 deletions
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33
compiler/rustc_ty_utils/src/layout.rs
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@ -126,6 +126,39 @@ fn layout_of_uncached<'tcx>(
debug_assert!(!ty.has_non_region_infer());
Ok(match *ty.kind() {
ty::Pat(ty, pat) => {
let layout = cx.layout_of(ty)?.layout;
let mut layout = LayoutS::clone(&layout.0);
match *pat {
ty::PatternKind::Range { start, end, include_end } => {
if let Abi::Scalar(scalar) | Abi::ScalarPair(scalar, _) = &mut layout.abi {
if let Some(start) = start {
scalar.valid_range_mut().start = start.eval_bits(tcx, param_env);
}
if let Some(end) = end {
let mut end = end.eval_bits(tcx, param_env);
if !include_end {
end = end.wrapping_sub(1);
}
scalar.valid_range_mut().end = end;
}
let niche = Niche {
offset: Size::ZERO,
value: scalar.primitive(),
valid_range: scalar.valid_range(cx),
};
layout.largest_niche = Some(niche);
tcx.mk_layout(layout)
} else {
bug!("pattern type with range but not scalar layout: {ty:?}, {layout:?}")
}
}
}
}
// Basic scalars.
ty::Bool => tcx.mk_layout(LayoutS::scalar(
cx,