message: interpret: make read-pointer-as-bytes *always* work in Miri
  and show some extra information when it happens in CTFE
diff: @@ -186,7 +186,10 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
  let size = Size::from_bytes(
  4 * ret_lane_count, /* size_of([u32; ret_lane_count]) */
  );
  - alloc.inner().get_bytes(fx, alloc_range(offset, size)).unwrap()
  + alloc
  + .inner()
  + .get_bytes_strip_provenance(fx, alloc_range(offset, size))
  + .unwrap()
  }
  _ => unreachable!("{:?}", idx_const),
  };
  