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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ssa
import (
"cmd/compile/internal/types"
"cmd/internal/obj"
"cmd/internal/obj/arm64"
"cmd/internal/obj/s390x"
"cmd/internal/obj/x86"
"cmd/internal/src"
"fmt"
"testing"
)
var CheckFunc = checkFunc
var Opt = opt
var Deadcode = deadcode
var Copyelim = copyelim
var testCtxts = map[string]*obj.Link{
"amd64": obj.Linknew(&x86.Linkamd64),
"s390x": obj.Linknew(&s390x.Links390x),
"arm64": obj.Linknew(&arm64.Linkarm64),
}
func testConfig(tb testing.TB) *Conf { return testConfigArch(tb, "amd64") }
func testConfigS390X(tb testing.TB) *Conf { return testConfigArch(tb, "s390x") }
func testConfigARM64(tb testing.TB) *Conf { return testConfigArch(tb, "arm64") }
func testConfigArch(tb testing.TB, arch string) *Conf {
ctxt, ok := testCtxts[arch]
if !ok {
tb.Fatalf("unknown arch %s", arch)
}
if ctxt.Arch.PtrSize != 8 {
tb.Fatal("dummyTypes is 64-bit only")
}
c := &Conf{
config: NewConfig(arch, dummyTypes, ctxt, true),
tb: tb,
}
return c
}
type Conf struct {
config *Config
tb testing.TB
fe Frontend
}
func (c *Conf) Frontend() Frontend {
if c.fe == nil {
c.fe = DummyFrontend{t: c.tb, ctxt: c.config.ctxt}
}
return c.fe
}
// DummyFrontend is a test-only frontend.
// It assumes 64 bit integers and pointers.
type DummyFrontend struct {
t testing.TB
ctxt *obj.Link
}
type DummyAuto struct {
t *types.Type
s string
}
func (d *DummyAuto) Typ() *types.Type {
return d.t
}
func (d *DummyAuto) String() string {
return d.s
}
func (d *DummyAuto) StorageClass() StorageClass {
return ClassAuto
}
func (d *DummyAuto) IsSynthetic() bool {
return false
}
func (d *DummyAuto) IsAutoTmp() bool {
return true
}
func (DummyFrontend) StringData(s string) *obj.LSym {
return nil
}
func (DummyFrontend) Auto(pos src.XPos, t *types.Type) GCNode {
return &DummyAuto{t: t, s: "aDummyAuto"}
}
func (d DummyFrontend) SplitString(s LocalSlot) (LocalSlot, LocalSlot) {
return LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 8}
}
func (d DummyFrontend) SplitInterface(s LocalSlot) (LocalSlot, LocalSlot) {
return LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off + 8}
}
func (d DummyFrontend) SplitSlice(s LocalSlot) (LocalSlot, LocalSlot, LocalSlot) {
return LocalSlot{N: s.N, Type: s.Type.Elem().PtrTo(), Off: s.Off},
LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 8},
LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 16}
}
func (d DummyFrontend) SplitComplex(s LocalSlot) (LocalSlot, LocalSlot) {
if s.Type.Size() == 16 {
return LocalSlot{N: s.N, Type: dummyTypes.Float64, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Float64, Off: s.Off + 8}
}
return LocalSlot{N: s.N, Type: dummyTypes.Float32, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Float32, Off: s.Off + 4}
}
func (d DummyFrontend) SplitInt64(s LocalSlot) (LocalSlot, LocalSlot) {
if s.Type.IsSigned() {
return LocalSlot{N: s.N, Type: dummyTypes.Int32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off}
}
return LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off}
}
func (d DummyFrontend) SplitStruct(s LocalSlot, i int) LocalSlot {
return LocalSlot{N: s.N, Type: s.Type.FieldType(i), Off: s.Off + s.Type.FieldOff(i)}
}
func (d DummyFrontend) SplitArray(s LocalSlot) LocalSlot {
return LocalSlot{N: s.N, Type: s.Type.Elem(), Off: s.Off}
}
func (DummyFrontend) Line(_ src.XPos) string {
return "unknown.go:0"
}
func (DummyFrontend) AllocFrame(f *Func) {
}
func (d DummyFrontend) Syslook(s string) *obj.LSym {
return d.ctxt.Lookup(s)
}
func (DummyFrontend) UseWriteBarrier() bool {
return true // only writebarrier_test cares
}
func (DummyFrontend) SetWBPos(pos src.XPos) {
}
func (d DummyFrontend) Logf(msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d DummyFrontend) Log() bool { return true }
func (d DummyFrontend) Fatalf(_ src.XPos, msg string, args ...interface{}) { d.t.Fatalf(msg, args...) }
func (d DummyFrontend) Warnl(_ src.XPos, msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d DummyFrontend) Debug_checknil() bool { return false }
func (d DummyFrontend) MyImportPath() string {
return "my/import/path"
}
var dummyTypes Types
func init() {
// Initialize just enough of the universe and the types package to make our tests function.
// TODO(josharian): move universe initialization to the types package,
// so this test setup can share it.
types.Tconv = func(t *types.Type, flag, mode int) string {
return t.Etype.String()
}
types.Sconv = func(s *types.Sym, flag, mode int) string {
return "sym"
}
types.FormatSym = func(sym *types.Sym, s fmt.State, verb rune, mode int) {
fmt.Fprintf(s, "sym")
}
types.FormatType = func(t *types.Type, s fmt.State, verb rune, mode int) {
fmt.Fprintf(s, "%v", t.Etype)
}
types.Dowidth = func(t *types.Type) {}
for _, typ := range [...]struct {
width int64
et types.EType
}{
{1, types.TINT8},
{1, types.TUINT8},
{1, types.TBOOL},
{2, types.TINT16},
{2, types.TUINT16},
{4, types.TINT32},
{4, types.TUINT32},
{4, types.TFLOAT32},
{4, types.TFLOAT64},
{8, types.TUINT64},
{8, types.TINT64},
{8, types.TINT},
{8, types.TUINTPTR},
} {
t := types.New(typ.et)
t.Width = typ.width
t.Align = uint8(typ.width)
types.Types[typ.et] = t
}
dummyTypes.SetTypPtrs()
}
func (d DummyFrontend) DerefItab(sym *obj.LSym, off int64) *obj.LSym { return nil }
func (d DummyFrontend) CanSSA(t *types.Type) bool {
// There are no un-SSAable types in dummy land.
return true
}
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