Update skeleton

examples/ir/simple_if.ir

@@ -0,0 +1,48 @@
+
+fun i32 @fibonacci {
+init:
+  bid: b0
+  allocations: 
+    %l0:i32:n
+
+block b0:
+  %b0:i0:unit = store %b0:p0:i32 %l0:*i32
+  %b0:i1:i32 = load %l0:*i32
+  %b0:i2:u1 = cmp lt %b0:i1:i32 2:i32
+  br %b0:i2:u1, b1(), b2()
+
+block b1:
+  %b1:i0:i32 = load %l0:*i32
+  %b1:i1:i32 = add %b1:i0:i32 2:i32
+  %b1:i2:unit = store %b1:i1:i32 %l0:*i32
+  j b3()
+
+block b2:
+  j b3()
+
+block b3:
+  %b3:i0:i32 = load %l0:*i32
+  %b3:i1:i32 = sub %b3:i0:i32 2:i32
+  %b3:i2:i32 = call @fibonacci(%b3:i1:i32)
+  %b3:i3:i32 = load %l0:*i32
+  %b3:i4:i32 = sub %b3:i3:i32 1:i32
+  %b3:i5:i32 = call @fibonacci(%b3:i4:i32)
+  %b3:i6:i32 = add %b3:i2:i32 %b3:i5:i32
+  ret %b3:i6:i32
+
+block b4:
+  ret undef:i32
+}
+
+fun i32 @main {
+init:
+  bid: b0
+  allocations: 
+
+
+block b0:
+  ret 1:i32
+
+block b1:
+  ret 0:i32
+}