extrafunc.tree

linux下编程用 编译软件

// { dg-do compile }
// { dg-options "-O2 -fdump-tree-optimized -Wunused-function" }
// Check to see that unused functions get removed at -O2 and
// above.
static int foo (int bar);
static int baz (int aaa);
external_definition int ext (int bbb);

foo
{
	return bar;
}

baz // { dg-warning "defined but not used" }
{
	return foo (aaa);
}

ext
{
	return foo (bbb);
}

// { dg-final { scan-tree-dump-not "baz" "optimized" } }
// { dg-final { cleanup-tree-dump "optimized" } }