mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-10-16 15:43:25 +00:00
800321db06
So that (*codegen).Visit is able to omit code generation for these unused global vars. The most tricky part is to detect unused global variables, it is done in several steps: 1. Collect the set of named used/unused global vars. 2. Collect the set of globally declared expressions that contain function calls. 3. Pick up global vars from the set made at step 2. 4. Traverse used functions and puck up those global vars that are used from these functions. 5. Rename all globals that are presented in the set made at step 1 but are not presented in the set made on step 3 or step 4.
924 lines
25 KiB
Go
924 lines
25 KiB
Go
package compiler_test
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import (
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"bytes"
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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"
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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 TestUnusedGlobal(t *testing.T) {
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t.Run("simple unused", func(t *testing.T) {
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src := `package foo
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const (
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_ int = iota
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a
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)
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // PUSH1 + RET
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})
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t.Run("unused with function call inside", func(t *testing.T) {
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t.Run("specification names count matches values count", func(t *testing.T) {
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src := `package foo
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var control int
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var _ = f()
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func Main() int {
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return control
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}
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func f() int {
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control = 1
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return 5
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}`
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eval(t, src, big.NewInt(1))
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})
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t.Run("specification names count differs from values count", func(t *testing.T) {
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src := `package foo
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var control int
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var _, _ = f()
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func Main() int {
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return control
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}
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func f() (int, int) {
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control = 1
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return 5, 6
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}`
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eval(t, src, big.NewInt(1))
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})
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t.Run("used", func(t *testing.T) {
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src := `package foo
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var _, A = f()
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func Main() int {
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return A
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}
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func f() (int, int) {
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return 5, 6
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}`
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eval(t, src, big.NewInt(6))
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checkInstrCount(t, src, 1, 1, 0, 0) // sslot for A, single call to f
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})
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})
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t.Run("unused without function call", func(t *testing.T) {
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src := `package foo
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var _ = 1
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var (
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_ = 2 + 3
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_, _ = 3 + 4, 5
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)
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // PUSH1 + RET
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})
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}
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func TestUnusedOptimizedGlobalVar(t *testing.T) {
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t.Run("unused, no initialization", func(t *testing.T) {
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src := `package foo
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var A int
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var (
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B int
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C, D, E int
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)
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("used, no initialization", func(t *testing.T) {
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src := `package foo
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var A int
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func Main() int {
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return A
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}`
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eval(t, src, big.NewInt(0))
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checkInstrCount(t, src, 1, 0, 0, 0) // sslot for A
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})
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t.Run("used by unused var, no initialization", func(t *testing.T) {
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src := `package foo
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var Unused int
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var Unused2 = Unused + 1
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("unused, with initialization", func(t *testing.T) {
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src := `package foo
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var Unused = 1
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func Main() int {
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return 2
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}`
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prog := eval(t, src, big.NewInt(2))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("unused, with initialization by used var", func(t *testing.T) {
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src := `package foo
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var (
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A = 1
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B, Unused, C = f(), A + 2, 3 // the code for Unused initialization won't be emitted as it's a pure expression without function calls
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Unused2 = 4
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)
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var Unused3 = 5
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func Main() int {
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return A + C
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}
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func f() int {
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return 4
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}`
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eval(t, src, big.NewInt(4), []interface{}{opcode.INITSSLOT, []byte{2}}, // sslot for A and C
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opcode.PUSH1, opcode.STSFLD0, // store A
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[]interface{}{opcode.CALL, []byte{10}}, opcode.DROP, // evaluate B and drop
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opcode.PUSH3, opcode.STSFLD1, opcode.RET, // store C
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opcode.LDSFLD0, opcode.LDSFLD1, opcode.ADD, opcode.RET, // Main
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opcode.PUSH4, opcode.RET) // f
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})
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t.Run("used by unused var, with initialization", func(t *testing.T) {
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src := `package foo
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var (
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Unused1 = 1
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Unused2 = Unused1 + 1
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)
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("used with combination of nested unused", func(t *testing.T) {
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src := `package foo
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var (
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A = 1
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Unused1 = 2
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Unused2 = Unused1 + 1
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)
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func Main() int {
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return A
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
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opcode.PUSH1, opcode.STSFLD0, opcode.RET, // store A
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opcode.LDSFLD0, opcode.RET) // Main
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})
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t.Run("single var stmt with both used and unused vars", func(t *testing.T) {
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src := `package foo
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var A, Unused1, B, Unused2 = 1, 2, 3, 4
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func Main() int {
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return A + B
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}`
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eval(t, src, big.NewInt(4), []interface{}{opcode.INITSSLOT, []byte{2}}, // sslot for A and B
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opcode.PUSH1, opcode.STSFLD0, // store A
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opcode.PUSH3, opcode.STSFLD1, opcode.RET, // store B
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opcode.LDSFLD0, opcode.LDSFLD1, opcode.ADD, opcode.RET) // Main
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})
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t.Run("single var decl token with multiple var specifications", func(t *testing.T) {
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src := `package foo
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var (
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A, Unused1, B, Unused2 = 1, 2, 3, 4
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C, Unused3 int
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)
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func Main() int {
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return A + B + C
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}`
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eval(t, src, big.NewInt(4), []interface{}{opcode.INITSSLOT, []byte{3}}, // sslot for A, B, C
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opcode.PUSH1, opcode.STSFLD0, // store A
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opcode.PUSH3, opcode.STSFLD1, // store B
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opcode.PUSH0, opcode.STSFLD2, opcode.RET, // store C
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opcode.LDSFLD0, opcode.LDSFLD1, opcode.ADD, opcode.LDSFLD2, opcode.ADD, opcode.RET) // Main
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})
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t.Run("function as unused var value", func(t *testing.T) {
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src := `package foo
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var A, Unused1 = 1, f()
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func Main() int {
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return A
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}
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func f() int {
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return 2
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
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opcode.PUSH1, opcode.STSFLD0, // store A
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[]interface{}{opcode.CALL, []byte{6}}, opcode.DROP, opcode.RET, // evaluate Unused1 (call to f) and drop its value
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opcode.LDSFLD0, opcode.RET, // Main
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opcode.PUSH2, opcode.RET) // f
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})
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t.Run("function as unused struct field", func(t *testing.T) {
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src := `package foo
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type Str struct { Int int }
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var _ = Str{Int: f()}
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func Main() int {
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return 1
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}
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func f() int {
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return 2
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.CALL, []byte{8}}, opcode.PUSH1, opcode.PACKSTRUCT, opcode.DROP, opcode.RET, // evaluate struct val
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opcode.PUSH1, opcode.RET, // Main
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opcode.PUSH2, opcode.RET) // f
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})
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t.Run("used in unused function", func(t *testing.T) {
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src := `package foo
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var Unused1, Unused2, Unused3 = 1, 2, 3
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func Main() int {
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return 1
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}
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func unused1() int {
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return Unused1
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}
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func unused2() int {
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return Unused1 + unused1()
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}
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func unused3() int {
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return Unused2 + unused2()
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("used in used function", func(t *testing.T) {
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src := `package foo
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var A = 1
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func Main() int {
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return f()
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}
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func f() int {
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return A
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 1, 1, 0, 0)
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})
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t.Run("unused, initialized via init", func(t *testing.T) {
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src := `package foo
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var A int
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func Main() int {
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return 2
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}
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func init() {
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A = 1 // Although A is unused from exported functions, it's used from init(), so it should be mark as "used" and stored.
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}`
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eval(t, src, big.NewInt(2))
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checkInstrCount(t, src, 1, 0, 0, 0)
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})
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t.Run("used, initialized via init", func(t *testing.T) {
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src := `package foo
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var A int
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func Main() int {
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return A
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}
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func init() {
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A = 1
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 1, 0, 0, 0)
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})
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t.Run("unused, initialized by function call", func(t *testing.T) {
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t.Run("unnamed", func(t *testing.T) {
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src := `package foo
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var _ = f()
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func Main() int {
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return 1
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}
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func f() int {
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return 2
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 0, 1, 0, 0)
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})
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t.Run("named", func(t *testing.T) {
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src := `package foo
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var A = f()
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func Main() int {
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return 1
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}
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func f() int {
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return 2
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 0, 1, 0, 0)
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})
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t.Run("named, with dependency on unused var", func(t *testing.T) {
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src := `package foo
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var (
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A = 1
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B = A + 1 // To check nested ident values.
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C = 3
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D = B + f() + C // To check that both idents (before and after the call to f) will be marked as "used".
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E = C + 1 // Unused, no code expected.
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)
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func Main() int {
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return 1
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}
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func f() int {
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return 2
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{3}}, // sslot for A
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opcode.PUSH1, opcode.STSFLD0, // store A
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opcode.LDSFLD0, opcode.PUSH1, opcode.ADD, opcode.STSFLD1, // store B
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opcode.PUSH3, opcode.STSFLD2, // store C
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opcode.LDSFLD1, []interface{}{opcode.CALL, []byte{9}}, opcode.ADD, opcode.LDSFLD2, opcode.ADD, opcode.DROP, opcode.RET, // evaluate D and drop
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opcode.PUSH1, opcode.RET, // Main
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opcode.PUSH2, opcode.RET) // f
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})
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t.Run("named, with dependency on unused var ident inside function call", func(t *testing.T) {
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src := `package foo
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var A = 1
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var B = f(A)
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func Main() int {
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return 1
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}
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func f(a int) int {
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return a
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
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opcode.PUSH1, opcode.STSFLD0, // store A
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opcode.LDSFLD0, []interface{}{opcode.CALL, []byte{6}}, opcode.DROP, opcode.RET, // evaluate B and drop
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opcode.PUSH1, opcode.RET, // Main
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[]interface{}{opcode.INITSLOT, []byte{0, 1}}, opcode.LDARG0, opcode.RET) // f
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})
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t.Run("named, inside multi-specs and multi-vals var declaration", func(t *testing.T) {
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src := `package foo
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var (
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Unused = 1
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Unused1, A, Unused2 = 2, 3 + f(), 4
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)
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func Main() int {
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return 1
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}
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func f() int {
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return 5
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}`
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eval(t, src, big.NewInt(1), opcode.PUSH3, []interface{}{opcode.CALL, []byte{7}}, opcode.ADD, opcode.DROP, opcode.RET, // evaluate and drop A
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opcode.PUSH1, opcode.RET, // Main
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opcode.PUSH5, opcode.RET) // f
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})
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t.Run("unnamed + unused", func(t *testing.T) {
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src := `package foo
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var A = 1 // At least one global variable is used, thus, the whole set of package variables will be walked.
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var B = 2
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var _ = B + 1 // This variable is unnamed and doesn't contain call, thus its children won't be marked as "used".
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func Main() int {
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return A
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
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opcode.PUSH1, opcode.STSFLD0, opcode.RET, // store A
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opcode.LDSFLD0, opcode.RET) // Main
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})
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t.Run("mixed value", func(t *testing.T) {
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src := `package foo
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var control int // At least one global variable is used, thus the whole set of package variables will be walked.
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var B = 2
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var _ = 1 + f() + B // This variable is unnamed but contains call, thus its children will be marked as "used".
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func Main() int {
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return control
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}
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func f() int {
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control = 1
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return 3
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 2 /* control + B */, 1, 0, 0)
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})
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t.Run("multiple function return values", func(t *testing.T) {
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src := `package foo
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var A, B = f()
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func Main() int {
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return A
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}
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func f() (int, int) {
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return 3, 4
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}`
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eval(t, src, big.NewInt(3), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
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[]interface{}{opcode.CALL, []byte{7}}, opcode.STSFLD0, opcode.DROP, opcode.RET, // evaluate and store A, drop B
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opcode.LDSFLD0, opcode.RET, // Main
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opcode.PUSH4, opcode.PUSH3, opcode.RET) // f
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})
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t.Run("constant in declaration", func(t *testing.T) {
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src := `package foo
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const A = 5
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var Unused = 1 + A
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func Main() int {
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return 1
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}`
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prog := eval(t, src, big.NewInt(1))
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require.Equal(t, 2, len(prog)) // Main
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})
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t.Run("mixed expression", func(t *testing.T) {
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src := `package foo
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type CustomInt struct {
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Int int
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}
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var A = CustomInt{Int: 2}
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var B = f(3) + A.f(1)
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func Main() int {
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return 1
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}
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func f(a int) int {
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return a
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}
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func (i CustomInt) f(a int) int { // has the same name as f
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return i.Int + a
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}`
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eval(t, src, big.NewInt(1))
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checkInstrCount(t, src, 1 /* A */, 2, 2, 0)
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})
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})
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t.Run("mixed nested expressions", func(t *testing.T) {
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src := `package foo
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type CustomInt struct { Int int} // has the same field name as Int variable, important for test
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var A = CustomInt{Int: 2}
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var B = f(A.Int)
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var Unused = 4
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var Int = 5 // unused and MUST NOT be treated as "used"
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var C = CustomInt{Int: Unused}.Int + f(1) // uses Unused => Unused should be marked as "used"
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func Main() int {
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return 1
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}
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func f(a int) int {
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return a
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}
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func (i CustomInt) f(a int) int { // has the same name as f
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return i.Int + a
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}`
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eval(t, src, big.NewInt(1))
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})
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t.Run("composite literal", func(t *testing.T) {
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src := `package foo
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var A = 2
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var B = []int{1, A, 3}[1]
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var C = f(1) + B
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func Main() int {
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return 1
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}
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func f(a int) int {
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return a
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}`
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eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{2}}, // sslot for A, B
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opcode.PUSH2, opcode.STSFLD0, // store A
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opcode.PUSH3, opcode.LDSFLD0, opcode.PUSH1, opcode.PUSH3, opcode.PACK, opcode.PUSH1, opcode.PICKITEM, opcode.STSFLD1, // evaluate B
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opcode.PUSH1, []interface{}{opcode.CALL, []byte{8}}, opcode.LDSFLD1, opcode.ADD, opcode.DROP, opcode.RET, // evalute C and drop
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opcode.PUSH1, opcode.RET, // Main
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[]interface{}{opcode.INITSLOT, []byte{0, 1}}, opcode.LDARG0, opcode.RET) // f
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})
|
|
t.Run("index expression", func(t *testing.T) {
|
|
src := `package foo
|
|
var Unused = 2
|
|
var A = f(1) + []int{1, 2, 3}[Unused] // index expression
|
|
func Main() int {
|
|
return 1
|
|
}
|
|
func f(a int) int {
|
|
return a
|
|
}`
|
|
eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for Unused
|
|
opcode.PUSH2, opcode.STSFLD0, // store Unused
|
|
opcode.PUSH1, []interface{}{opcode.CALL, []byte{14}}, // call f(1)
|
|
opcode.PUSH3, opcode.PUSH2, opcode.PUSH1, opcode.PUSH3, opcode.PACK, opcode.LDSFLD0, opcode.PICKITEM, // eval index expression
|
|
opcode.ADD, opcode.DROP, opcode.RET, // eval and drop A
|
|
opcode.PUSH1, opcode.RET, // Main
|
|
[]interface{}{opcode.INITSLOT, []byte{0, 1}}, opcode.LDARG0, opcode.RET) // f(a)
|
|
})
|
|
t.Run("used via nested function calls", func(t *testing.T) {
|
|
src := `package foo
|
|
var A = 1
|
|
func Main() int {
|
|
return f()
|
|
}
|
|
func f() int {
|
|
return g()
|
|
}
|
|
func g() int {
|
|
return A
|
|
}`
|
|
eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for A
|
|
opcode.PUSH1, opcode.STSFLD0, opcode.RET, // store A
|
|
[]interface{}{opcode.CALL, []byte{3}}, opcode.RET, // Main
|
|
[]interface{}{opcode.CALL, []byte{3}}, opcode.RET, // f
|
|
opcode.LDSFLD0, opcode.RET) // g
|
|
})
|
|
t.Run("struct field name matches global var name", func(t *testing.T) {
|
|
src := `package foo
|
|
type CustomStr struct { Int int }
|
|
var str = CustomStr{Int: 2}
|
|
var Int = 5 // Unused and the code must not be emitted.
|
|
func Main() int {
|
|
return str.Int
|
|
}`
|
|
eval(t, src, big.NewInt(2), []interface{}{opcode.INITSSLOT, []byte{1}}, // sslot for str
|
|
opcode.PUSH2, opcode.PUSH1, opcode.PACKSTRUCT, opcode.STSFLD0, opcode.RET, // store str
|
|
opcode.LDSFLD0, opcode.PUSH0, opcode.PICKITEM, opcode.RET) // Main
|
|
})
|
|
t.Run("var as a struct field initializer", func(t *testing.T) {
|
|
src := `package foo
|
|
type CustomStr struct { Int int }
|
|
var A = 5
|
|
var Int = 6 // Unused
|
|
func Main() int {
|
|
return CustomStr{Int: A}.Int
|
|
}`
|
|
eval(t, src, big.NewInt(5))
|
|
})
|
|
t.Run("argument of globally called function", func(t *testing.T) {
|
|
src := `package foo
|
|
var Unused = 5
|
|
var control int
|
|
var _, A = f(Unused)
|
|
func Main() int {
|
|
return control
|
|
}
|
|
func f(int) (int, int) {
|
|
control = 5
|
|
return 1, 2
|
|
}`
|
|
eval(t, src, big.NewInt(5))
|
|
})
|
|
t.Run("argument of locally called function", func(t *testing.T) {
|
|
src := `package foo
|
|
var Unused = 5
|
|
func Main() int {
|
|
var _, a = f(Unused)
|
|
return a
|
|
}
|
|
func f(i int) (int, int) {
|
|
return i, i
|
|
}`
|
|
eval(t, src, big.NewInt(5))
|
|
})
|
|
t.Run("used in globally called defer", func(t *testing.T) {
|
|
src := `package foo
|
|
var control1, control2 int
|
|
var Unused = 5
|
|
var _ = f()
|
|
func Main() int {
|
|
return control1 + control2
|
|
}
|
|
func f() int {
|
|
control1 = 1
|
|
defer func(){
|
|
control2 = Unused
|
|
}()
|
|
return 2
|
|
}`
|
|
eval(t, src, big.NewInt(6))
|
|
})
|
|
t.Run("used in locally called defer", func(t *testing.T) {
|
|
src := `package foo
|
|
var control1, control2 int
|
|
var Unused = 5
|
|
func Main() int {
|
|
_ = f()
|
|
return control1 + control2
|
|
}
|
|
func f() int {
|
|
control1 = 1
|
|
defer func(){
|
|
control2 = Unused
|
|
}()
|
|
return 2
|
|
}`
|
|
eval(t, src, big.NewInt(6))
|
|
})
|
|
t.Run("imported", func(t *testing.T) {
|
|
t.Run("init by func call", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/globalvar"
|
|
func Main() int {
|
|
return globalvar.Default
|
|
}`
|
|
eval(t, src, big.NewInt(0))
|
|
checkInstrCount(t, src, 1 /* Default */, 1 /* f */, 0, 0)
|
|
})
|
|
t.Run("nested var call", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/globalvar/nested1"
|
|
func Main() int {
|
|
return nested1.C
|
|
}`
|
|
eval(t, src, big.NewInt(81))
|
|
checkInstrCount(t, src, 6 /* dependant vars of nested1.C */, 3, 1, 1)
|
|
})
|
|
t.Run("nested func call", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/globalvar/funccall"
|
|
func Main() int {
|
|
return funccall.F()
|
|
}`
|
|
eval(t, src, big.NewInt(56))
|
|
checkInstrCount(t, src, 2 /* nested2.Argument + nested1.Argument */, -1, -1, -1)
|
|
})
|
|
t.Run("nested method call", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/globalvar/funccall"
|
|
func Main() int {
|
|
return funccall.GetAge()
|
|
}`
|
|
eval(t, src, big.NewInt(24))
|
|
checkInstrCount(t, src, 3, /* nested3.Anna + nested2.Argument + nested3.Argument */
|
|
5, /* funccall.GetAge() + Anna.GetAge() + nested1.f + nested1.f + nested2.f */
|
|
2 /* nested1.f + nested2.f */, 0)
|
|
})
|
|
})
|
|
}
|
|
|
|
func TestChangeGlobal(t *testing.T) {
|
|
src := `package foo
|
|
var a int
|
|
func Main() int {
|
|
setLocal()
|
|
set42()
|
|
setLocal()
|
|
return a
|
|
}
|
|
func set42() { a = 42 }
|
|
func setLocal() { a := 10; _ = a }`
|
|
|
|
eval(t, src, big.NewInt(42))
|
|
}
|
|
|
|
func TestMultiDeclaration(t *testing.T) {
|
|
src := `package foo
|
|
var a, b, c int
|
|
func Main() int {
|
|
a = 1
|
|
b = 2
|
|
c = 3
|
|
return a + b + c
|
|
}`
|
|
eval(t, src, big.NewInt(6))
|
|
}
|
|
|
|
func TestCountLocal(t *testing.T) {
|
|
src := `package foo
|
|
func Main() int {
|
|
a, b, c, d := f()
|
|
return a + b + c + d
|
|
}
|
|
func f() (int, int, int, int) {
|
|
return 1, 2, 3, 4
|
|
}`
|
|
eval(t, src, big.NewInt(10))
|
|
}
|
|
|
|
func TestMultiDeclarationLocal(t *testing.T) {
|
|
src := `package foo
|
|
func Main() int {
|
|
var a, b, c int
|
|
a = 1
|
|
b = 2
|
|
c = 3
|
|
return a + b + c
|
|
}`
|
|
eval(t, src, big.NewInt(6))
|
|
}
|
|
|
|
func TestMultiDeclarationLocalCompound(t *testing.T) {
|
|
src := `package foo
|
|
func Main() int {
|
|
var a, b, c []int
|
|
a = append(a, 1)
|
|
b = append(b, 2)
|
|
c = append(c, 3)
|
|
return a[0] + b[0] + c[0]
|
|
}`
|
|
eval(t, src, big.NewInt(6))
|
|
}
|
|
|
|
func TestShadow(t *testing.T) {
|
|
srcTmpl := `package foo
|
|
func Main() int {
|
|
x := 1
|
|
y := 10
|
|
%s
|
|
x += 1 // increase old local
|
|
x := 30 // introduce new local
|
|
y += x // make sure is means something
|
|
}
|
|
return x+y
|
|
}`
|
|
|
|
runCase := func(b string) func(t *testing.T) {
|
|
return func(t *testing.T) {
|
|
src := fmt.Sprintf(srcTmpl, b)
|
|
eval(t, src, big.NewInt(42))
|
|
}
|
|
}
|
|
|
|
t.Run("If", runCase("if true {"))
|
|
t.Run("For", runCase("for i := 0; i < 1; i++ {"))
|
|
t.Run("Range", runCase("for range []int{1} {"))
|
|
t.Run("Switch", runCase("switch true {\ncase false: x += 2\ncase true:"))
|
|
t.Run("Block", runCase("{"))
|
|
}
|
|
|
|
func TestArgumentLocal(t *testing.T) {
|
|
srcTmpl := `package foo
|
|
func some(a int) int {
|
|
if a > 42 {
|
|
a := 24
|
|
_ = a
|
|
}
|
|
return a
|
|
}
|
|
func Main() int {
|
|
return some(%d)
|
|
}`
|
|
t.Run("Override", func(t *testing.T) {
|
|
src := fmt.Sprintf(srcTmpl, 50)
|
|
eval(t, src, big.NewInt(50))
|
|
})
|
|
t.Run("NoOverride", func(t *testing.T) {
|
|
src := fmt.Sprintf(srcTmpl, 40)
|
|
eval(t, src, big.NewInt(40))
|
|
})
|
|
}
|
|
|
|
func TestContractWithNoMain(t *testing.T) {
|
|
src := `package foo
|
|
var someGlobal int = 1
|
|
func Add3(a int) int {
|
|
someLocal := 2
|
|
return someGlobal + someLocal + a
|
|
}`
|
|
b, di, err := compiler.CompileWithOptions("foo.go", strings.NewReader(src), nil)
|
|
require.NoError(t, err)
|
|
v := vm.New()
|
|
invokeMethod(t, "Add3", b.Script, v, di)
|
|
v.Estack().PushVal(39)
|
|
require.NoError(t, v.Run())
|
|
require.Equal(t, 1, v.Estack().Len())
|
|
require.Equal(t, big.NewInt(42), v.PopResult())
|
|
}
|
|
|
|
func TestMultipleFiles(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
return multi.Sum()
|
|
}`
|
|
eval(t, src, big.NewInt(42))
|
|
}
|
|
|
|
func TestExportedVariable(t *testing.T) {
|
|
t.Run("Use", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
return multi.SomeVar12
|
|
}`
|
|
eval(t, src, big.NewInt(12))
|
|
})
|
|
t.Run("ChangeAndUse", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
multi.SomeVar12 = 10
|
|
return multi.Sum()
|
|
}`
|
|
eval(t, src, big.NewInt(40))
|
|
})
|
|
t.Run("PackageAlias", func(t *testing.T) {
|
|
src := `package foo
|
|
import kek "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
kek.SomeVar12 = 10
|
|
return kek.Sum()
|
|
}`
|
|
eval(t, src, big.NewInt(40))
|
|
})
|
|
t.Run("DifferentName", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/strange"
|
|
func Main() int {
|
|
normal.NormalVar = 42
|
|
return normal.NormalVar
|
|
}`
|
|
eval(t, src, big.NewInt(42))
|
|
})
|
|
t.Run("MultipleEqualNames", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
var SomeVar12 = 1
|
|
func Main() int {
|
|
SomeVar30 := 3
|
|
sum := SomeVar12 + multi.SomeVar30
|
|
sum += SomeVar30
|
|
sum += multi.SomeVar12
|
|
return sum
|
|
}`
|
|
eval(t, src, big.NewInt(46))
|
|
})
|
|
}
|
|
|
|
func TestExportedConst(t *testing.T) {
|
|
t.Run("with vars", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
return multi.SomeConst
|
|
}`
|
|
eval(t, src, big.NewInt(42))
|
|
})
|
|
t.Run("const only", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/constonly"
|
|
func Main() int {
|
|
return constonly.Answer
|
|
}`
|
|
eval(t, src, big.NewInt(42))
|
|
})
|
|
}
|
|
|
|
func TestMultipleFuncSameName(t *testing.T) {
|
|
t.Run("Simple", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/multi"
|
|
func Main() int {
|
|
return multi.Sum() + Sum()
|
|
}
|
|
func Sum() int {
|
|
return 11
|
|
}`
|
|
eval(t, src, big.NewInt(53))
|
|
})
|
|
t.Run("WithMethod", func(t *testing.T) {
|
|
src := `package foo
|
|
import "github.com/nspcc-dev/neo-go/pkg/compiler/testdata/foo"
|
|
type Foo struct{}
|
|
func (f Foo) Bar() int { return 11 }
|
|
func Bar() int { return 22 }
|
|
func Main() int {
|
|
var a Foo
|
|
var b foo.Foo
|
|
return a.Bar() + // 11
|
|
foo.Bar() + // 1
|
|
b.Bar() + // 8
|
|
Bar() // 22
|
|
}`
|
|
eval(t, src, big.NewInt(42))
|
|
})
|
|
}
|
|
|
|
func TestConstDontUseSlots(t *testing.T) {
|
|
const count = 256
|
|
buf := bytes.NewBufferString("package foo\n")
|
|
for i := 0; i < count; i++ {
|
|
buf.WriteString(fmt.Sprintf("const n%d = 1\n", i))
|
|
}
|
|
buf.WriteString("func Main() int { sum := 0\n")
|
|
for i := 0; i < count; i++ {
|
|
buf.WriteString(fmt.Sprintf("sum += n%d\n", i))
|
|
}
|
|
buf.WriteString("return sum }")
|
|
|
|
src := buf.String()
|
|
eval(t, src, big.NewInt(count))
|
|
}
|
|
|
|
func TestUnderscoreVarsDontUseSlots(t *testing.T) {
|
|
const count = 128
|
|
buf := bytes.NewBufferString("package foo\n")
|
|
for i := 0; i < count; i++ {
|
|
buf.WriteString(fmt.Sprintf("var _, n%d = 1, 1\n", i))
|
|
}
|
|
buf.WriteString("func Main() int { sum := 0\n")
|
|
for i := 0; i < count; i++ {
|
|
buf.WriteString(fmt.Sprintf("sum += n%d\n", i))
|
|
}
|
|
buf.WriteString("return sum }")
|
|
|
|
src := buf.String()
|
|
eval(t, src, big.NewInt(count))
|
|
}
|
|
|
|
func TestUnderscoreGlobalVarDontEmitCode(t *testing.T) {
|
|
src := `package foo
|
|
var _ int
|
|
var _ = 1
|
|
var (
|
|
A = 2
|
|
_ = A + 3
|
|
_, B, _ = 4, 5, 6
|
|
_, C, _ = f(A, B)
|
|
)
|
|
var D = 7 // named unused, after global codegen optimisation no code expected
|
|
func Main() int {
|
|
return 1
|
|
}
|
|
func f(a, b int) (int, int, int) {
|
|
return 8, 9, 10
|
|
}`
|
|
eval(t, src, big.NewInt(1), []interface{}{opcode.INITSSLOT, []byte{2}}, // sslot for A, B
|
|
opcode.PUSH2, opcode.STSFLD0, // store A
|
|
opcode.PUSH5, opcode.STSFLD1, // store B
|
|
opcode.LDSFLD0, opcode.LDSFLD1, opcode.SWAP, []interface{}{opcode.CALL, []byte{8}}, // evaluate f(A,B)
|
|
opcode.DROP, opcode.DROP, opcode.DROP, opcode.RET, // drop result of f(A,B)
|
|
opcode.PUSH1, opcode.RET, // Main
|
|
[]interface{}{opcode.INITSLOT, []byte{0, 2}}, opcode.PUSH10, opcode.PUSH9, opcode.PUSH8, opcode.RET) // f
|
|
}
|