ast visiting for IR building

src/ast2/intern.rs

@@ -574,6 +574,17 @@ pub struct TypeInfo {
     pub signed: bool,
 }
 
+impl TypeInfo {
+    /// byte size
+    pub fn size(&self) -> u32 {
+        self.bitsize.div_ceil(8)
+    }
+    /// byte align
+    pub fn align(&self) -> u32 {
+        self.bitalign.div_ceil(8)
+    }
+}
+
 impl InternPool {
     pub fn peer_type(&mut self, lhs: Index, rhs: Index) -> Option<Index> {
         if lhs == rhs {

src/lib.rs

@@ -70,3 +70,5 @@ impl BitSize for &[u8] {
         bits as u32
     }
 }
+
+pub fn unit<T>(_: T) {}

src/triples.rs

@@ -759,8 +759,8 @@ impl<'tree, 'ir> IRBuilder<'tree, 'ir> {
 }
 
 pub struct IR {
-    nodes: Vec<Inst>,
-    data: Vec<Option<Data>>,
+    pub(crate) nodes: Vec<Inst>,
+    pub(crate) data: Vec<Option<Data>>,
     // intern_pool: &'a mut InternPool,
 }