add some tests

hblang/README.md

@@ -557,4 +557,36 @@ main := fn(): int {
 	}
 	return 1
 }
+```
+
+#### comptime_function_from_another_file
+```hb
+.{min} := @use("math.hb")
+a := min(100, 50)
+
+main := fn(): int {
+	return a
+}
+
+
+// in module: math.hb
+
+
+SIZEOF_INT := 32
+SHIFT := SIZEOF_INT - 1
+min := fn(a: int, b: int): int {
+	c := a - b
+	return b + (c & c >> SHIFT)
+}
+```
+
+#### using_structs_in_registers
+```hb
+ColorBGRA := struct {b: u8, g: u8, r: u8, a: u8}
+MAGENTA := ColorBGRA.{b: 205, g: 0, r: 205, a: 255}
+
+main := fn(): int {
+	color := MAGENTA
+	return color.r
+}
 ```

hblang/src/codegen.rs

@@ -3341,5 +3341,7 @@ mod tests {
         comptime_pointers => README;
         sort_something_viredly => README;
         hex_octal_binary_literals => README;
+        comptime_function_from_another_file => README;
+        using_structs_in_registers => README;
     }
 }