Add tests

examples/ir3/typedef.ir

@@ -0,0 +1,13 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations: 
+    %l0:i32:a
+
+block b0:
+  %b0:i0:unit = store 0:i32 %l0:*i32
+  %b0:i1:unit = store 1:i32 %l0:*i32
+  %b0:i2:i32 = load %l0:*i32
+  ret %b0:i2:i32
+}