inter-procedural call test

backend.native/tests/Makefile

@@ -1,4 +1,5 @@
-TESTS := sum
+TESTS := sum \
+         sum_foo_bar
 
 BIN_TESTS=$(foreach t, ${TESTS},${t}_test)
 

backend.native/tests/codegen/function/sum_foo_bar-test.c

@@ -0,0 +1,10 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*sum)(int, int) = resolve_symbol("kfun:sumFooBar");
+  
+  if (sum(2, 3) != 5) return 1;
+
+  return 0;
+}

backend.native/tests/codegen/function/sum_foo_bar.kt

@@ -0,0 +1,4 @@
+fun foo(a:Int):Int = a
+fun bar(a:Int):Int = a
+
+fun sumFooBar(a:Int, b:Int):Int = foo(a) + bar(b)