// license that can be found in the LICENSE file.

// WARNING: Please avoid updating this file.
// See the warning in ../devirt.go for more details.

package mult

var sink int

type Multiplier interface {
	Multiply(a, b int) int
}

type Mult struct{}

func (Mult) Multiply(a, b int) int {
	for i := 0; i < 1000; i++ {
		sink++
	}
	return a * b
}

type NegMult struct{}

example.com/pgo/devirtualize.ExerciseFuncField
example.com/pgo/devirtualize/mult%2epkg.MultFn
23 94
example.com/pgo/devirtualize.ExerciseFuncClosure
example.com/pgo/devirtualize/mult%2epkg.MultClosure.func1
18 93
example.com/pgo/devirtualize.ExerciseFuncClosure
example.com/pgo/devirtualize.Add.Add
18 92
example.com/pgo/devirtualize.ExerciseFuncConcrete
example.com/pgo/devirtualize/mult%2epkg.MultFn
48 91
example.com/pgo/devirtualize.ExerciseIface

	// Copy the module to a scratch location so we can add a go.mod.
	dir := t.TempDir()
	if err := os.Mkdir(filepath.Join(dir, "mult.pkg"), 0755); err != nil {
		t.Fatalf("error creating dir: %v", err)
	}
	for _, file := range []string{"devirt.go", "devirt_test.go", profFileName, filepath.Join("mult.pkg", "mult.go")} {
		if err := copyFile(filepath.Join(dir, file), filepath.Join(srcDir, file)); err != nil {

	ExerciseFuncConcrete(b.N, AddFn, SubFn, mult.MultFn, mult.NegMultFn)
}

func TestDevirtFuncConcrete(t *testing.T) {
	if v := ExerciseFuncConcrete(10, AddFn, SubFn, mult.MultFn, mult.NegMultFn); v != 1176 {
		t.Errorf("ExerciseFuncConcrete(10) got %d want 1176", v)
	}
}

func BenchmarkDevirtFuncField(b *testing.B) {
	ExerciseFuncField(b.N, AddFn, SubFn, mult.MultFn, mult.NegMultFn)
}

//
// This is a simplified version of ExerciseFuncConcrete, but accessing the
// function values via a struct field.
//
//go:noinline
func ExerciseFuncField(iter int, a1, a2 AddFunc, m1, m2 mult.MultFunc) int {
	ops := struct {
		a AddFunc
		m mult.MultFunc
	}{}

	val := 0
	for i := 0; i < iter; i++ {
		ops.a = a1
		ops.m = m1
		if i%10 == 0 {
			ops.a = a2
			ops.m = m2
		}