diff options
Diffstat (limited to 'compiler/rustc_const_eval/src/interpret/step.rs')
| -rw-r--r-- | compiler/rustc_const_eval/src/interpret/step.rs | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/step.rs b/compiler/rustc_const_eval/src/interpret/step.rs index 9a366364e..1e60a1e72 100644 --- a/compiler/rustc_const_eval/src/interpret/step.rs +++ b/compiler/rustc_const_eval/src/interpret/step.rs @@ -113,8 +113,14 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { Intrinsic(box intrinsic) => self.emulate_nondiverging_intrinsic(intrinsic)?, - // Statements we do not track. - PlaceMention(..) | AscribeUserType(..) => {} + // Evaluate the place expression, without reading from it. + PlaceMention(box place) => { + let _ = self.eval_place(*place)?; + } + + // This exists purely to guide borrowck lifetime inference, and does not have + // an operational effect. + AscribeUserType(..) => {} // Currently, Miri discards Coverage statements. Coverage statements are only injected // via an optional compile time MIR pass and have no side effects. Since Coverage @@ -280,20 +286,23 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { self.write_immediate(*val, &dest)?; } - NullaryOp(null_op, ty) => { + NullaryOp(ref null_op, ty) => { let ty = self.subst_from_current_frame_and_normalize_erasing_regions(ty)?; let layout = self.layout_of(ty)?; - if layout.is_unsized() { + if let mir::NullOp::SizeOf | mir::NullOp::AlignOf = null_op && layout.is_unsized() { // FIXME: This should be a span_bug (#80742) self.tcx.sess.delay_span_bug( self.frame().current_span(), - &format!("Nullary MIR operator called for unsized type {}", ty), + format!("{null_op:?} MIR operator called for unsized type {ty}"), ); throw_inval!(SizeOfUnsizedType(ty)); } let val = match null_op { mir::NullOp::SizeOf => layout.size.bytes(), mir::NullOp::AlignOf => layout.align.abi.bytes(), + mir::NullOp::OffsetOf(fields) => { + layout.offset_of_subfield(self, fields.iter().map(|f| f.index())).bytes() + } }; self.write_scalar(Scalar::from_target_usize(val, self), &dest)?; } |