Fix type layout

• Make sure all elements in nested array are aligned.
• Update AlignedSlice in CFD.

juno_samples/rodinia/cfd/src/setup.rs

@@ -20,11 +20,11 @@ pub const VAR_DENSITY_ENERGY: usize = VAR_MOMENTUM + NDIM;
 pub const NVAR: usize = VAR_DENSITY_ENERGY + 1;
 pub const deg_angle_of_attack: f32 = 0.0;
 
-#[repr(align(32))]
-struct Alignment([u8; 32]);
+#[repr(align(64))]
+struct Alignment([u8; 64]);
 
 // An aligned slice is stored as a boxed slice and an offset number of elements
-// that we skip over to get the desired alignment (of 32 bytes)
+// that we skip over to get the desired alignment (of 64 bytes)
 pub struct AlignedSlice<T> {
     slice: Box<[T]>,
     offset: usize,
@@ -37,8 +37,8 @@ where
 {
     pub fn of_len(len: usize) -> Self {
         // The maximum number of elements that may be waisted in getting the alignment we need is
-        // (32 - alignment of T) / size of T
-        let extra_elements = (32 - std::mem::align_of::<T>()) / std::mem::size_of::<T>();
+        // (64 - alignment of T) / size of T
+        let extra_elements = (64 - std::mem::align_of::<T>()) / std::mem::size_of::<T>();
         let slice: Box<[T]> = (0..len + extra_elements)
             .map(|_| Default::default())
             .collect();