Mark scalar layout unions so that backends that do not support partially initialized scalars can special case them.

2022-03-03 12:02:12 +00:00
parent 2ed6786404
commit d32ce37a17
37 changed files with 356 additions and 288 deletions
--- a/compiler/rustc_const_eval/src/interpret/intrinsics.rs
+++ b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
@@ -188,7 +188,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                let val = self.read_scalar(&args[0])?.check_init()?;
                let bits = val.to_bits(layout_of.size)?;
                let kind = match layout_of.abi {
-                    Abi::Scalar(scalar) => scalar.value,
+                    Abi::Scalar(scalar) => scalar.primitive(),
                    _ => span_bug!(
                        self.cur_span(),
                        "{} called on invalid type {:?}",