diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_const_eval/src/interpret/eval_context.rs | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/eval_context.rs b/compiler/rustc_const_eval/src/interpret/eval_context.rs index d2e0a0dd240..51cfcdb8331 100644 --- a/compiler/rustc_const_eval/src/interpret/eval_context.rs +++ b/compiler/rustc_const_eval/src/interpret/eval_context.rs @@ -598,7 +598,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { // the last field). Can't have foreign types here, how would we // adjust alignment and size for them? let field = layout.field(self, layout.fields.count() - 1); - let Some((unsized_size, unsized_align)) = self.size_and_align_of(metadata, &field)? else { + let Some((unsized_size, mut unsized_align)) = self.size_and_align_of(metadata, &field)? else { // A field with an extern type. We don't know the actual dynamic size // or the alignment. return Ok(None); @@ -614,6 +614,13 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { // Return the sum of sizes and max of aligns. let size = sized_size + unsized_size; // `Size` addition + // Packed types ignore the alignment of their fields. + if let ty::Adt(def, _) = layout.ty.kind() { + if def.repr().packed() { + unsized_align = sized_align; + } + } + // Choose max of two known alignments (combined value must // be aligned according to more restrictive of the two). let align = sized_align.max(unsized_align); |