-- src.go --
package p
func f(int) int
func g() int
func main() {
	x := f(g())
	_ = x
}
-- want --
B0: ExKindSubExpr, CFG block .0
	g()
	succs: B1

B1: ExKindSubExpr, CFG block .0
	f(B0)
	succs: B2

B2: ExKindStmt, CFG block .0
	x := B1
	succs: B3

B3: ExKindStmt, CFG block .0
	_ = x
	succs: B4

B4: ExKindStmt, CFG block .0
	return