Cleaned up linter warnings

src/build/compile.go

@@ -51,30 +51,11 @@ func compile(functions <-chan *Function, errors <-chan error) (Result, error) {
 
 	result.Used = append(result.Used, main)
 	delete(result.Unused, "main")
-	result.findCalls(main)
+	result.findAliveCode(main)
 
 	return result, nil
 }
 
-func (result *Result) findCalls(f *Function) {
-	for _, x := range f.Assembler.Instructions {
-		if x.Mnemonic != asm.CALL {
-			continue
-		}
-
-		name := x.Data.(*asm.Label).Name
-		called, exists := result.Unused[name]
-
-		if !exists {
-			continue
-		}
-
-		result.Used = append(result.Used, called)
-		delete(result.Unused, name)
-		result.findCalls(called)
-	}
-}
-
 // compileFunctions starts a goroutine for each function compilation and waits for completion.
 func compileFunctions(functions map[string]*Function) {
 	wg := sync.WaitGroup{}
@@ -90,3 +71,23 @@ func compileFunctions(functions map[string]*Function) {
 
 	wg.Wait()
 }
+
+// findAliveCode recursively finds all the calls to external functions and marks them as required.
+func (result *Result) findAliveCode(f *Function) {
+	for _, x := range f.Assembler.Instructions {
+		if x.Mnemonic != asm.CALL {
+			continue
+		}
+
+		name := x.Data.(*asm.Label).Name
+		called, exists := result.Unused[name]
+
+		if !exists {
+			continue
+		}
+
+		result.Used = append(result.Used, called)
+		delete(result.Unused, name)
+		result.findAliveCode(called)
+	}
+}