mirror of
https://github.com/nspcc-dev/neo-go.git
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0bc81aecf4
Our current algorithm marks function as used if it is called at least ones, even if the callee function is itself unused. This commit implements more clever traversal to collect usage information more precisely. Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
353 lines
6.7 KiB
Go
353 lines
6.7 KiB
Go
package compiler_test
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import (
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"fmt"
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"math/big"
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"strings"
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"testing"
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"github.com/nspcc-dev/neo-go/pkg/compiler"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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"github.com/stretchr/testify/require"
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)
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func TestSimpleFunctionCall(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := 10
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y := getSomeInteger()
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return x + y
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}
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func getSomeInteger() int {
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x := 10
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return x
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}
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`
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eval(t, src, big.NewInt(20))
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}
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func TestNotAssignedFunctionCall(t *testing.T) {
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t.Run("Simple", func(t *testing.T) {
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src := `package testcase
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func Main() int {
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getSomeInteger()
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getSomeInteger()
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return 0
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}
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func getSomeInteger() int {
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return 0
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}`
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eval(t, src, big.NewInt(0))
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})
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t.Run("If", func(t *testing.T) {
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src := `package testcase
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func f() bool { return true }
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func Main() int {
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if f() {
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return 42
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}
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return 0
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}`
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eval(t, src, big.NewInt(42))
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})
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t.Run("Switch", func(t *testing.T) {
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src := `package testcase
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func f() bool { return true }
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func Main() int {
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switch true {
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case f():
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return 42
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default:
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return 0
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}
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}`
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eval(t, src, big.NewInt(42))
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})
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t.Run("Builtin", func(t *testing.T) {
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src := `package foo
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import "github.com/nspcc-dev/neo-go/pkg/interop/util"
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func Main() int {
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util.FromAddress("NPAsqZkx9WhNd4P72uhZxBhLinSuNkxfB8")
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util.FromAddress("NPAsqZkx9WhNd4P72uhZxBhLinSuNkxfB8")
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return 1
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}`
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eval(t, src, big.NewInt(1))
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})
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t.Run("Lambda", func(t *testing.T) {
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src := `package foo
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func Main() int {
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f := func() (int, int) { return 1, 2 }
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f()
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f()
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return 42
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}`
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eval(t, src, big.NewInt(42))
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})
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t.Run("VarDecl", func(t *testing.T) {
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src := `package foo
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func foo() []int { return []int{1} }
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func Main() int {
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var x = foo()
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return len(x)
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}`
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eval(t, src, big.NewInt(1))
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})
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}
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func TestMultipleFunctionCalls(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := 10
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y := getSomeInteger()
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return x + y
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}
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func getSomeInteger() int {
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x := 10
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y := getSomeOtherInt()
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return x + y
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}
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func getSomeOtherInt() int {
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x := 8
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return x
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}
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`
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eval(t, src, big.NewInt(28))
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}
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func TestFunctionCallWithArgs(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := 10
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y := getSomeInteger(x)
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return y
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}
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func getSomeInteger(x int) int {
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y := 8
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return x + y
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}
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`
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eval(t, src, big.NewInt(18))
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}
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func TestFunctionCallWithInterfaceType(t *testing.T) {
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src := `
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package testcase
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func Main() interface{} {
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x := getSomeInteger(10)
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return x
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}
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func getSomeInteger(x interface{}) interface{} {
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return x
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}
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`
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eval(t, src, big.NewInt(10))
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}
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func TestFunctionCallMultiArg(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := addIntegers(2, 4)
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return x
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}
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func addIntegers(x int, y int) int {
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return x + y
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}
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`
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eval(t, src, big.NewInt(6))
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}
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func TestFunctionWithVoidReturn(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := 2
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getSomeInteger()
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y := 4
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return x + y
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}
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func getSomeInteger() { %s }
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`
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t.Run("EmptyBody", func(t *testing.T) {
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src := fmt.Sprintf(src, "")
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eval(t, src, big.NewInt(6))
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})
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t.Run("SingleReturn", func(t *testing.T) {
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src := fmt.Sprintf(src, "return")
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eval(t, src, big.NewInt(6))
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})
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}
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func TestFunctionWithVoidReturnBranch(t *testing.T) {
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src := `
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package testcase
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func Main() int {
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x := %t
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f(x)
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return 2
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}
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func f(x bool) {
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if x {
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return
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}
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}
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`
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t.Run("ReturnBranch", func(t *testing.T) {
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src := fmt.Sprintf(src, true)
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eval(t, src, big.NewInt(2))
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})
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t.Run("NoReturn", func(t *testing.T) {
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src := fmt.Sprintf(src, false)
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eval(t, src, big.NewInt(2))
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})
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}
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func TestFunctionWithMultipleArgumentNames(t *testing.T) {
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src := `package foo
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func Main() int {
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return add(1, 2)
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}
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func add(a, b int) int {
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return a + b
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}`
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eval(t, src, big.NewInt(3))
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}
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func TestLocalsCount(t *testing.T) {
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src := `package foo
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func f(a, b, c int) int {
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sum := a
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for i := 0; i < c; i++ {
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sum += b
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}
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return sum
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}
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func Main() int {
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return f(1, 2, 3)
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}`
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eval(t, src, big.NewInt(7))
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}
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func TestVariadic(t *testing.T) {
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srcTmpl := `package foo
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func someFunc(a int, b ...int) int {
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sum := a
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for i := range b {
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sum = sum - b[i]
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}
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return sum
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}
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func Main() int {
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%s
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return someFunc(10, %s)
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}`
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t.Run("Elements", func(t *testing.T) {
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src := fmt.Sprintf(srcTmpl, "", "1, 2, 3")
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eval(t, src, big.NewInt(4))
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})
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t.Run("Slice", func(t *testing.T) {
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src := fmt.Sprintf(srcTmpl, "a := []int{1, 2, 3}", "a...")
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eval(t, src, big.NewInt(4))
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})
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t.Run("Literal", func(t *testing.T) {
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src := fmt.Sprintf(srcTmpl, "", "[]int{1, 2, 3}...")
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eval(t, src, big.NewInt(4))
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})
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}
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func TestVariadicMethod(t *testing.T) {
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src := `package foo
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type myInt int
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func (x myInt) someFunc(a int, b ...int) int {
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sum := int(x) + a
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for i := range b {
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sum = sum - b[i]
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}
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return sum
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}
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func Main() int {
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x := myInt(38)
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return x.someFunc(10, 1, 2, 3)
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}`
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eval(t, src, big.NewInt(42))
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}
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func TestJumpOptimize(t *testing.T) {
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src := `package foo
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func init() {
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if true {} else {}
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var a int
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_ = a
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}
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func _deploy(_ interface{}, upd bool) {
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if true {} else {}
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t := upd
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_ = t
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}
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func Get1() int { return 1 }
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func Get2() int { Get1(); Get1(); Get1(); Get1(); return Get1() }
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func Get3() int { return Get2() }
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func Main() int {
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return Get3()
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}`
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b, di, err := compiler.CompileWithDebugInfo("", strings.NewReader(src))
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require.NoError(t, err)
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require.Equal(t, 6, len(di.Methods))
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for _, mi := range di.Methods {
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// only _deploy and init have locals here
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if mi.Name.Name == "_deploy" || mi.Name.Name == "init" {
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require.Equal(t, b[mi.Range.Start], byte(opcode.INITSLOT))
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}
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require.Equal(t, b[mi.Range.End], byte(opcode.RET))
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}
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}
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func TestFunctionUnusedParameters(t *testing.T) {
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src := `package foo
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func add13(a int, _ int, _1 int, _ int) int {
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return a + _1
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}
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func Main() int {
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return add13(1, 10, 100, 1000)
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}`
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eval(t, src, big.NewInt(101))
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}
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func TestUnusedFunctions(t *testing.T) {
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t.Run("only variable", func(t *testing.T) {
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src := `package foo
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import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/nestedcall"
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func Main() int {
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return nestedcall.X
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}`
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b, err := compiler.Compile("foo", strings.NewReader(src))
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require.NoError(t, err)
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require.Equal(t, 3, len(b)) // PUSHINT8 (42) + RET
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eval(t, src, big.NewInt(42))
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})
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t.Run("imported function", func(t *testing.T) {
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// Check that import map is set correctly during package traversal.
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src := `package foo
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import inner "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/nestedcall"
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func Main() int {
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return inner.N()
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}`
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_, err := compiler.Compile("foo", strings.NewReader(src))
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require.NoError(t, err)
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eval(t, src, big.NewInt(65))
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})
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}
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