llvm-gcc-4.2/gcc/testsuite/treelang/compile/full_unit.tree

// { dg-do compile }
// { dg-options "-funit-at-a-time" }
external_definition int add (int arga, int argb);
external_definition char sub (char argc, char argd);

add
{
	return arga + argb + +3;
}

sub
{
	return argd - argc + +2;
}
// { dg-final { scan-assembler "add" } }
// { dg-final { scan-assembler "sub" } }