diff options
Diffstat (limited to 'compiler/rustc_middle/src/mir/tcx.rs')
| -rw-r--r-- | compiler/rustc_middle/src/mir/tcx.rs | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/mir/tcx.rs b/compiler/rustc_middle/src/mir/tcx.rs index a122cffdb87..126387db1d9 100644 --- a/compiler/rustc_middle/src/mir/tcx.rs +++ b/compiler/rustc_middle/src/mir/tcx.rs @@ -180,7 +180,10 @@ impl<'tcx> Rvalue<'tcx> { let rhs_ty = rhs.ty(local_decls, tcx); op.ty(tcx, lhs_ty, rhs_ty) } - Rvalue::UnaryOp(UnOp::Not | UnOp::Neg, ref operand) => operand.ty(local_decls, tcx), + Rvalue::UnaryOp(op, ref operand) => { + let arg_ty = operand.ty(local_decls, tcx); + op.ty(tcx, arg_ty) + } Rvalue::Discriminant(ref place) => place.ty(local_decls, tcx).ty.discriminant_ty(tcx), Rvalue::NullaryOp(NullOp::SizeOf | NullOp::AlignOf | NullOp::OffsetOf(..), _) => { tcx.types.usize @@ -282,6 +285,27 @@ impl<'tcx> BinOp { } } +impl<'tcx> UnOp { + pub fn ty(&self, tcx: TyCtxt<'tcx>, arg_ty: Ty<'tcx>) -> Ty<'tcx> { + match self { + UnOp::Not | UnOp::Neg => arg_ty, + UnOp::PtrMetadata => { + let pointee_ty = arg_ty + .builtin_deref(true) + .unwrap_or_else(|| bug!("PtrMetadata of non-dereferenceable ty {arg_ty:?}")); + if pointee_ty.is_trivially_sized(tcx) { + tcx.types.unit + } else { + let Some(metadata_def_id) = tcx.lang_items().metadata_type() else { + bug!("No metadata_type lang item while looking at {arg_ty:?}") + }; + Ty::new_projection(tcx, metadata_def_id, [pointee_ty]) + } + } + } + } +} + impl BorrowKind { pub fn to_mutbl_lossy(self) -> hir::Mutability { match self { |