func (fr *frame) callRecover(isDeferredRecover bool) *govalue {
startbb := fr.builder.GetInsertBlock()
recoverbb := llvm.AddBasicBlock(fr.function, "")
contbb := llvm.AddBasicBlock(fr.function, "")
canRecover := fr.builder.CreateTrunc(fr.canRecover, llvm.Int1Type(), "")
fr.builder.CreateCondBr(canRecover, recoverbb, contbb)
fr.builder.SetInsertPointAtEnd(recoverbb)
var recovered llvm.Value
if isDeferredRecover {
recovered = fr.runtime.deferredRecover.call(fr)[0]
} else {
recovered = fr.runtime.recover.call(fr)[0]
}
recoverbb = fr.builder.GetInsertBlock()
fr.builder.CreateBr(contbb)
fr.builder.SetInsertPointAtEnd(contbb)
eface := types.NewInterface(nil, nil)
llv := fr.builder.CreatePHI(fr.types.ToLLVM(eface), "")
llv.AddIncoming(
[]llvm.Value{llvm.ConstNull(llv.Type()), recovered},
[]llvm.BasicBlock{startbb, recoverbb},
)
return newValue(llv, eface)
}
// convertI2E converts a non-empty interface value to an empty interface.
func (fr *frame) convertI2E(v *govalue) *govalue {
td := fr.getInterfaceTypeDescriptor(v)
val := fr.builder.CreateExtractValue(v.value, 1, "")
typ := types.NewInterface(nil, nil)
intf := llvm.Undef(fr.types.ToLLVM(typ))
intf = fr.builder.CreateInsertValue(intf, td, 0, "")
intf = fr.builder.CreateInsertValue(intf, val, 1, "")
return newValue(intf, typ)
}
func initReflect(i *interpreter) {
i.reflectPackage = &ssa.Package{
Prog: i.prog,
Pkg: reflectTypesPackage,
Members: make(map[string]ssa.Member),
}
// Clobber the type-checker's notion of reflect.Value's
// underlying type so that it more closely matches the fake one
// (at least in the number of fields---we lie about the type of
// the rtype field).
//
// We must ensure that calls to (ssa.Value).Type() return the
// fake type so that correct "shape" is used when allocating
// variables, making zero values, loading, and storing.
//
// TODO(adonovan): obviously this is a hack. We need a cleaner
// way to fake the reflect package (almost---DeepEqual is fine).
// One approach would be not to even load its source code, but
// provide fake source files. This would guarantee that no bad
// information leaks into other packages.
if r := i.prog.ImportedPackage("reflect"); r != nil {
rV := r.Pkg.Scope().Lookup("Value").Type().(*types.Named)
// delete bodies of the old methods
mset := i.prog.MethodSets.MethodSet(rV)
for j := 0; j < mset.Len(); j++ {
i.prog.MethodValue(mset.At(j)).Blocks = nil
}
tEface := types.NewInterface(nil, nil).Complete()
rV.SetUnderlying(types.NewStruct([]*types.Var{
types.NewField(token.NoPos, r.Pkg, "t", tEface, false), // a lie
types.NewField(token.NoPos, r.Pkg, "v", tEface, false),
}, nil))
}
i.rtypeMethods = methodSet{
"Bits": newMethod(i.reflectPackage, rtypeType, "Bits"),
"Elem": newMethod(i.reflectPackage, rtypeType, "Elem"),
"Field": newMethod(i.reflectPackage, rtypeType, "Field"),
"In": newMethod(i.reflectPackage, rtypeType, "In"),
"Kind": newMethod(i.reflectPackage, rtypeType, "Kind"),
"NumField": newMethod(i.reflectPackage, rtypeType, "NumField"),
"NumIn": newMethod(i.reflectPackage, rtypeType, "NumIn"),
"NumMethod": newMethod(i.reflectPackage, rtypeType, "NumMethod"),
"NumOut": newMethod(i.reflectPackage, rtypeType, "NumOut"),
"Out": newMethod(i.reflectPackage, rtypeType, "Out"),
"Size": newMethod(i.reflectPackage, rtypeType, "Size"),
"String": newMethod(i.reflectPackage, rtypeType, "String"),
}
i.errorMethods = methodSet{
"Error": newMethod(i.reflectPackage, errorType, "Error"),
}
}
// InterfaceType = "interface" "{" [ MethodList ] "}" .
// MethodList = Method { ";" Method } .
// Method = Name Signature .
//
// The methods of embedded interfaces are always "inlined"
// by the compiler and thus embedded interfaces are never
// visible in the export data.
//
func (p *parser) parseInterfaceType() types.Type {
var methods []*types.Func
p.expectKeyword("interface")
p.expect('{')
for i := 0; p.tok != '}' && p.tok != scanner.EOF; i++ {
if i > 0 {
p.expect(';')
}
pkg, name := p.parseName(true)
sig := p.parseSignature(nil)
methods = append(methods, types.NewFunc(token.NoPos, pkg, name, sig))
}
p.expect('}')
// Complete requires the type's embedded interfaces to be fully defined,
// but we do not define any
return types.NewInterface(methods, nil).Complete()
}
// InterfaceType = "interface" "{" { ("?" Type | Func) ";" } "}" .
func (p *parser) parseInterfaceType(pkg *types.Package) types.Type {
p.expectKeyword("interface")
var methods []*types.Func
var typs []*types.Named
p.expect('{')
for p.tok != '}' && p.tok != scanner.EOF {
if p.tok == '?' {
p.next()
typs = append(typs, p.parseType(pkg).(*types.Named))
} else {
method := p.parseFunc(pkg)
methods = append(methods, method)
}
p.expect(';')
}
p.expect('}')
return types.NewInterface(methods, typs)
}
func (c *funcContext) translateStmt(stmt ast.Stmt, label *types.Label) {
c.SetPos(stmt.Pos())
stmt = filter.IncDecStmt(stmt, c.p.Info)
stmt = filter.Assign(stmt, c.p.Info)
switch s := stmt.(type) {
case *ast.BlockStmt:
c.translateStmtList(s.List)
case *ast.IfStmt:
if s.Init != nil {
c.translateStmt(s.Init, nil)
}
var caseClauses []ast.Stmt
ifStmt := s
for {
caseClauses = append(caseClauses, &ast.CaseClause{List: []ast.Expr{ifStmt.Cond}, Body: ifStmt.Body.List})
switch elseStmt := ifStmt.Else.(type) {
case *ast.IfStmt:
if elseStmt.Init != nil {
caseClauses = append(caseClauses, &ast.CaseClause{List: nil, Body: []ast.Stmt{elseStmt}})
break
}
ifStmt = elseStmt
continue
case *ast.BlockStmt:
caseClauses = append(caseClauses, &ast.CaseClause{List: nil, Body: elseStmt.List})
case *ast.EmptyStmt, nil:
// no else clause
default:
panic(fmt.Sprintf("Unhandled else: %T\n", elseStmt))
}
break
}
c.translateBranchingStmt(caseClauses, false, nil, nil, nil, c.Flattened[s])
case *ast.SwitchStmt:
if s.Init != nil {
c.translateStmt(s.Init, nil)
}
tag := s.Tag
if tag == nil {
tag = ast.NewIdent("true")
c.p.Types[tag] = types.TypeAndValue{Type: types.Typ[types.Bool], Value: exact.MakeBool(true)}
}
if c.p.Types[tag].Value == nil {
refVar := c.newVariable("_ref")
c.Printf("%s = %s;", refVar, c.translateExpr(tag))
tag = c.newIdent(refVar, c.p.Types[tag].Type)
}
translateCond := func(cond ast.Expr) *expression {
return c.translateExpr(&ast.BinaryExpr{
X: tag,
Op: token.EQL,
Y: cond,
})
}
c.translateBranchingStmt(s.Body.List, true, translateCond, nil, label, c.Flattened[s])
case *ast.TypeSwitchStmt:
if s.Init != nil {
c.translateStmt(s.Init, nil)
}
refVar := c.newVariable("_ref")
var expr ast.Expr
var printCaseBodyPrefix func(index int)
switch a := s.Assign.(type) {
case *ast.AssignStmt:
expr = a.Rhs[0].(*ast.TypeAssertExpr).X
printCaseBodyPrefix = func(index int) {
value := refVar
caseClause := s.Body.List[index].(*ast.CaseClause)
if len(caseClause.List) == 1 {
t := c.p.Types[caseClause.List[0]].Type
if _, isInterface := t.Underlying().(*types.Interface); !isInterface && !types.Identical(t, types.Typ[types.UntypedNil]) {
value += ".$val"
}
}
c.Printf("%s = %s;", c.objectName(c.p.Implicits[caseClause]), value)
}
case *ast.ExprStmt:
expr = a.X.(*ast.TypeAssertExpr).X
}
c.Printf("%s = %s;", refVar, c.translateExpr(expr))
translateCond := func(cond ast.Expr) *expression {
if types.Identical(c.p.Types[cond].Type, types.Typ[types.UntypedNil]) {
return c.formatExpr("%s === $ifaceNil", refVar)
}
return c.formatExpr("$assertType(%s, %s, true)[1]", refVar, c.typeName(c.p.Types[cond].Type))
}
c.translateBranchingStmt(s.Body.List, true, translateCond, printCaseBodyPrefix, label, c.Flattened[s])
case *ast.ForStmt:
if s.Init != nil {
c.translateStmt(s.Init, nil)
}
cond := func() string {
if s.Cond == nil {
return "true"
}
return c.translateExpr(s.Cond).String()
}
c.translateLoopingStmt(cond, s.Body, nil, func() {
if s.Post != nil {
c.translateStmt(s.Post, nil)
}
}, label, c.Flattened[s])
case *ast.RangeStmt:
refVar := c.newVariable("_ref")
c.Printf("%s = %s;", refVar, c.translateExpr(s.X))
switch t := c.p.Types[s.X].Type.Underlying().(type) {
case *types.Basic:
iVar := c.newVariable("_i")
c.Printf("%s = 0;", iVar)
runeVar := c.newVariable("_rune")
c.translateLoopingStmt(func() string { return iVar + " < " + refVar + ".length" }, s.Body, func() {
c.Printf("%s = $decodeRune(%s, %s);", runeVar, refVar, iVar)
if !isBlank(s.Key) {
c.Printf("%s", c.translateAssign(s.Key, iVar, types.Typ[types.Int], s.Tok == token.DEFINE))
}
if !isBlank(s.Value) {
c.Printf("%s", c.translateAssign(s.Value, runeVar+"[0]", types.Typ[types.Rune], s.Tok == token.DEFINE))
}
}, func() {
c.Printf("%s += %s[1];", iVar, runeVar)
}, label, c.Flattened[s])
case *types.Map:
iVar := c.newVariable("_i")
c.Printf("%s = 0;", iVar)
keysVar := c.newVariable("_keys")
c.Printf("%s = $keys(%s);", keysVar, refVar)
c.translateLoopingStmt(func() string { return iVar + " < " + keysVar + ".length" }, s.Body, func() {
entryVar := c.newVariable("_entry")
c.Printf("%s = %s[%s[%s]];", entryVar, refVar, keysVar, iVar)
c.translateStmt(&ast.IfStmt{
Cond: c.newIdent(entryVar+" === undefined", types.Typ[types.Bool]),
Body: &ast.BlockStmt{List: []ast.Stmt{&ast.BranchStmt{Tok: token.CONTINUE}}},
}, nil)
if !isBlank(s.Key) {
c.Printf("%s", c.translateAssign(s.Key, entryVar+".k", t.Key(), s.Tok == token.DEFINE))
}
if !isBlank(s.Value) {
c.Printf("%s", c.translateAssign(s.Value, entryVar+".v", t.Elem(), s.Tok == token.DEFINE))
}
}, func() {
c.Printf("%s++;", iVar)
}, label, c.Flattened[s])
case *types.Array, *types.Pointer, *types.Slice:
var length string
var elemType types.Type
switch t2 := t.(type) {
case *types.Array:
length = fmt.Sprintf("%d", t2.Len())
elemType = t2.Elem()
case *types.Pointer:
length = fmt.Sprintf("%d", t2.Elem().Underlying().(*types.Array).Len())
elemType = t2.Elem().Underlying().(*types.Array).Elem()
case *types.Slice:
length = refVar + ".$length"
elemType = t2.Elem()
}
iVar := c.newVariable("_i")
c.Printf("%s = 0;", iVar)
c.translateLoopingStmt(func() string { return iVar + " < " + length }, s.Body, func() {
if !isBlank(s.Key) {
c.Printf("%s", c.translateAssign(s.Key, iVar, types.Typ[types.Int], s.Tok == token.DEFINE))
}
if !isBlank(s.Value) {
c.Printf("%s", c.translateAssign(s.Value, c.translateImplicitConversion(c.setType(&ast.IndexExpr{
X: c.newIdent(refVar, t),
Index: c.newIdent(iVar, types.Typ[types.Int]),
}, elemType), elemType).String(), elemType, s.Tok == token.DEFINE))
}
}, func() {
c.Printf("%s++;", iVar)
}, label, c.Flattened[s])
case *types.Chan:
okVar := c.newIdent(c.newVariable("_ok"), types.Typ[types.Bool])
key := s.Key
tok := s.Tok
if key == nil {
key = ast.NewIdent("_")
tok = token.ASSIGN
}
forStmt := &ast.ForStmt{
Body: &ast.BlockStmt{
List: []ast.Stmt{
&ast.AssignStmt{
Lhs: []ast.Expr{
key,
okVar,
},
Rhs: []ast.Expr{
c.setType(&ast.UnaryExpr{X: c.newIdent(refVar, t), Op: token.ARROW}, types.NewTuple(types.NewVar(0, nil, "", t.Elem()), types.NewVar(0, nil, "", types.Typ[types.Bool]))),
},
Tok: tok,
},
&ast.IfStmt{
Cond: &ast.UnaryExpr{X: okVar, Op: token.NOT},
Body: &ast.BlockStmt{List: []ast.Stmt{&ast.BranchStmt{Tok: token.BREAK}}},
},
s.Body,
},
},
}
c.Flattened[forStmt] = true
c.translateStmt(forStmt, label)
default:
panic("")
}
case *ast.BranchStmt:
normalLabel := ""
blockingLabel := ""
data := c.flowDatas[nil]
if s.Label != nil {
normalLabel = " " + s.Label.Name
blockingLabel = " s" // use explicit label "s", because surrounding loop may not be flattened
data = c.flowDatas[c.p.Uses[s.Label].(*types.Label)]
}
switch s.Tok {
case token.BREAK:
c.PrintCond(data.endCase == 0, fmt.Sprintf("break%s;", normalLabel), fmt.Sprintf("$s = %d; continue%s;", data.endCase, blockingLabel))
case token.CONTINUE:
data.postStmt()
c.PrintCond(data.beginCase == 0, fmt.Sprintf("continue%s;", normalLabel), fmt.Sprintf("$s = %d; continue%s;", data.beginCase, blockingLabel))
case token.GOTO:
c.PrintCond(false, "goto "+s.Label.Name, fmt.Sprintf("$s = %d; continue;", c.labelCase(c.p.Uses[s.Label].(*types.Label))))
case token.FALLTHROUGH:
// handled in CaseClause
default:
panic("Unhandled branch statment: " + s.Tok.String())
}
case *ast.ReturnStmt:
results := s.Results
if c.resultNames != nil {
if len(s.Results) != 0 {
c.translateStmt(&ast.AssignStmt{
Lhs: c.resultNames,
Tok: token.ASSIGN,
Rhs: s.Results,
}, nil)
}
results = c.resultNames
}
c.Printf("return%s;", c.translateResults(results))
case *ast.DeferStmt:
isBuiltin := false
isJs := false
switch fun := s.Call.Fun.(type) {
case *ast.Ident:
var builtin *types.Builtin
builtin, isBuiltin = c.p.Uses[fun].(*types.Builtin)
if isBuiltin && builtin.Name() == "recover" {
c.Printf("$deferred.push([$recover, []]);")
return
}
case *ast.SelectorExpr:
isJs = typesutil.IsJsPackage(c.p.Uses[fun.Sel].Pkg())
}
sig := c.p.Types[s.Call.Fun].Type.Underlying().(*types.Signature)
args := c.translateArgs(sig, s.Call.Args, s.Call.Ellipsis.IsValid(), true)
if isBuiltin || isJs {
vars := make([]string, len(s.Call.Args))
callArgs := make([]ast.Expr, len(s.Call.Args))
for i, arg := range s.Call.Args {
v := c.newVariable("_arg")
vars[i] = v
callArgs[i] = c.newIdent(v, c.p.Types[arg].Type)
}
call := c.translateExpr(&ast.CallExpr{
Fun: s.Call.Fun,
Args: callArgs,
Ellipsis: s.Call.Ellipsis,
})
c.Printf("$deferred.push([function(%s) { %s; }, [%s]]);", strings.Join(vars, ", "), call, strings.Join(args, ", "))
return
}
c.Printf("$deferred.push([%s, [%s]]);", c.translateExpr(s.Call.Fun), strings.Join(args, ", "))
case *ast.AssignStmt:
if s.Tok != token.ASSIGN && s.Tok != token.DEFINE {
panic(s.Tok)
}
if s.Tok == token.DEFINE {
for _, lhs := range s.Lhs {
if !isBlank(lhs) {
obj := c.p.Defs[lhs.(*ast.Ident)]
if obj == nil {
obj = c.p.Uses[lhs.(*ast.Ident)]
}
c.setType(lhs, obj.Type())
}
}
}
switch {
case len(s.Lhs) == 1 && len(s.Rhs) == 1:
lhs := astutil.RemoveParens(s.Lhs[0])
if isBlank(lhs) {
if analysis.HasSideEffect(s.Rhs[0], c.p.Info.Info) {
c.Printf("%s;", c.translateExpr(s.Rhs[0]).String())
}
return
}
lhsType := c.p.Types[s.Lhs[0]].Type
c.Printf("%s", c.translateAssignOfExpr(lhs, s.Rhs[0], lhsType, s.Tok == token.DEFINE))
case len(s.Lhs) > 1 && len(s.Rhs) == 1:
tupleVar := c.newVariable("_tuple")
out := tupleVar + " = " + c.translateExpr(s.Rhs[0]).String() + ";"
tuple := c.p.Types[s.Rhs[0]].Type.(*types.Tuple)
for i, lhs := range s.Lhs {
lhs = astutil.RemoveParens(lhs)
if !isBlank(lhs) {
lhsType := c.p.Types[s.Lhs[i]].Type
out += " " + c.translateAssignOfExpr(lhs, c.newIdent(fmt.Sprintf("%s[%d]", tupleVar, i), tuple.At(i).Type()), lhsType, s.Tok == token.DEFINE)
}
}
c.Printf("%s", out)
case len(s.Lhs) == len(s.Rhs):
tmpVars := make([]string, len(s.Rhs))
var parts []string
for i, rhs := range s.Rhs {
tmpVars[i] = c.newVariable("_tmp")
if isBlank(astutil.RemoveParens(s.Lhs[i])) {
if analysis.HasSideEffect(rhs, c.p.Info.Info) {
c.Printf("%s;", c.translateExpr(rhs).String())
}
continue
}
lhsType := c.p.Types[s.Lhs[i]].Type
parts = append(parts, c.translateAssignOfExpr(c.newIdent(tmpVars[i], c.p.Types[s.Lhs[i]].Type), rhs, lhsType, true))
}
for i, lhs := range s.Lhs {
lhs = astutil.RemoveParens(lhs)
if !isBlank(lhs) {
t := c.p.Types[lhs].Type
parts = append(parts, c.translateAssignOfExpr(lhs, c.newIdent(tmpVars[i], t), t, s.Tok == token.DEFINE))
}
}
c.Printf("%s", strings.Join(parts, " "))
default:
panic("Invalid arity of AssignStmt.")
}
case *ast.DeclStmt:
decl := s.Decl.(*ast.GenDecl)
switch decl.Tok {
case token.VAR:
for _, spec := range s.Decl.(*ast.GenDecl).Specs {
valueSpec := spec.(*ast.ValueSpec)
lhs := make([]ast.Expr, len(valueSpec.Names))
for i, name := range valueSpec.Names {
lhs[i] = name
}
rhs := valueSpec.Values
isTuple := false
if len(rhs) == 1 {
_, isTuple = c.p.Types[rhs[0]].Type.(*types.Tuple)
}
for len(rhs) < len(lhs) && !isTuple {
rhs = append(rhs, nil)
}
c.translateStmt(&ast.AssignStmt{
Lhs: lhs,
Tok: token.DEFINE,
Rhs: rhs,
}, nil)
}
case token.TYPE:
for _, spec := range decl.Specs {
o := c.p.Defs[spec.(*ast.TypeSpec).Name].(*types.TypeName)
c.p.typeNames = append(c.p.typeNames, o)
c.p.objectNames[o] = c.newVariableWithLevel(o.Name(), true)
c.p.dependencies[o] = true
}
case token.CONST:
// skip, constants are inlined
}
case *ast.ExprStmt:
expr := c.translateExpr(s.X)
if expr != nil && expr.String() != "" {
c.Printf("%s;", expr)
}
case *ast.LabeledStmt:
label := c.p.Defs[s.Label].(*types.Label)
if c.GotoLabel[label] {
c.PrintCond(false, s.Label.Name+":", fmt.Sprintf("case %d:", c.labelCase(label)))
}
c.translateStmt(s.Stmt, label)
case *ast.GoStmt:
c.Printf("$go(%s, [%s]);", c.translateExpr(s.Call.Fun), strings.Join(c.translateArgs(c.p.Types[s.Call.Fun].Type.Underlying().(*types.Signature), s.Call.Args, s.Call.Ellipsis.IsValid(), false), ", "))
case *ast.SendStmt:
chanType := c.p.Types[s.Chan].Type.Underlying().(*types.Chan)
call := &ast.CallExpr{
Fun: c.newIdent("$send", types.NewSignature(nil, types.NewTuple(types.NewVar(0, nil, "", chanType), types.NewVar(0, nil, "", chanType.Elem())), nil, false)),
Args: []ast.Expr{s.Chan, s.Value},
}
c.Blocking[call] = true
c.translateStmt(&ast.ExprStmt{X: call}, label)
case *ast.SelectStmt:
var channels []string
var caseClauses []ast.Stmt
flattened := false
hasDefault := false
for i, s := range s.Body.List {
clause := s.(*ast.CommClause)
switch comm := clause.Comm.(type) {
case nil:
channels = append(channels, "[]")
hasDefault = true
case *ast.ExprStmt:
channels = append(channels, c.formatExpr("[%e]", astutil.RemoveParens(comm.X).(*ast.UnaryExpr).X).String())
case *ast.AssignStmt:
channels = append(channels, c.formatExpr("[%e]", astutil.RemoveParens(comm.Rhs[0]).(*ast.UnaryExpr).X).String())
case *ast.SendStmt:
channels = append(channels, c.formatExpr("[%e, %e]", comm.Chan, comm.Value).String())
default:
panic(fmt.Sprintf("unhandled: %T", comm))
}
indexLit := &ast.BasicLit{Kind: token.INT}
c.p.Types[indexLit] = types.TypeAndValue{Type: types.Typ[types.Int], Value: exact.MakeInt64(int64(i))}
caseClauses = append(caseClauses, &ast.CaseClause{
List: []ast.Expr{indexLit},
Body: clause.Body,
})
flattened = flattened || c.Flattened[clause]
}
selectCall := c.setType(&ast.CallExpr{
Fun: c.newIdent("$select", types.NewSignature(nil, types.NewTuple(types.NewVar(0, nil, "", types.NewInterface(nil, nil))), types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int])), false)),
Args: []ast.Expr{c.newIdent(fmt.Sprintf("[%s]", strings.Join(channels, ", ")), types.NewInterface(nil, nil))},
}, types.Typ[types.Int])
c.Blocking[selectCall] = !hasDefault
selectionVar := c.newVariable("_selection")
c.Printf("%s = %s;", selectionVar, c.translateExpr(selectCall))
translateCond := func(cond ast.Expr) *expression {
return c.formatExpr("%s[0] === %e", selectionVar, cond)
}
printCaseBodyPrefix := func(index int) {
if assign, ok := s.Body.List[index].(*ast.CommClause).Comm.(*ast.AssignStmt); ok {
switch rhsType := c.p.Types[assign.Rhs[0]].Type.(type) {
case *types.Tuple:
c.translateStmt(&ast.AssignStmt{Lhs: assign.Lhs, Rhs: []ast.Expr{c.newIdent(selectionVar+"[1]", rhsType)}, Tok: assign.Tok}, nil)
default:
c.translateStmt(&ast.AssignStmt{Lhs: assign.Lhs, Rhs: []ast.Expr{c.newIdent(selectionVar+"[1][0]", rhsType)}, Tok: assign.Tok}, nil)
}
}
}
c.translateBranchingStmt(caseClauses, true, translateCond, printCaseBodyPrefix, label, flattened)
case *ast.EmptyStmt:
// skip
default:
panic(fmt.Sprintf("Unhandled statement: %T\n", s))
}
}
func (c *funcContext) translateBuiltin(name string, sig *types.Signature, args []ast.Expr, ellipsis bool) *expression {
switch name {
case "new":
t := sig.Results().At(0).Type().(*types.Pointer)
if c.p.Pkg.Path() == "syscall" && types.Identical(t.Elem().Underlying(), types.Typ[types.Uintptr]) {
return c.formatExpr("new Uint8Array(8)")
}
switch t.Elem().Underlying().(type) {
case *types.Struct, *types.Array:
return c.formatExpr("%e", c.zeroValue(t.Elem()))
default:
return c.formatExpr("$newDataPointer(%e, %s)", c.zeroValue(t.Elem()), c.typeName(t))
}
case "make":
switch argType := c.p.TypeOf(args[0]).Underlying().(type) {
case *types.Slice:
t := c.typeName(c.p.TypeOf(args[0]))
if len(args) == 3 {
return c.formatExpr("$makeSlice(%s, %f, %f)", t, args[1], args[2])
}
return c.formatExpr("$makeSlice(%s, %f)", t, args[1])
case *types.Map:
return c.formatExpr("{}")
case *types.Chan:
length := "0"
if len(args) == 2 {
length = c.translateExpr(args[1]).String()
}
return c.formatExpr("new %s(%s)", c.typeName(c.p.TypeOf(args[0])), length)
default:
panic(fmt.Sprintf("Unhandled make type: %T\n", argType))
}
case "len":
switch argType := c.p.TypeOf(args[0]).Underlying().(type) {
case *types.Basic:
return c.formatExpr("%e.length", args[0])
case *types.Slice:
return c.formatExpr("%e.$length", args[0])
case *types.Pointer:
return c.formatExpr("(%e, %d)", args[0], argType.Elem().(*types.Array).Len())
case *types.Map:
return c.formatExpr("$keys(%e).length", args[0])
case *types.Chan:
return c.formatExpr("%e.$buffer.length", args[0])
// length of array is constant
default:
panic(fmt.Sprintf("Unhandled len type: %T\n", argType))
}
case "cap":
switch argType := c.p.TypeOf(args[0]).Underlying().(type) {
case *types.Slice, *types.Chan:
return c.formatExpr("%e.$capacity", args[0])
case *types.Pointer:
return c.formatExpr("(%e, %d)", args[0], argType.Elem().(*types.Array).Len())
// capacity of array is constant
default:
panic(fmt.Sprintf("Unhandled cap type: %T\n", argType))
}
case "panic":
return c.formatExpr("$panic(%s)", c.translateImplicitConversion(args[0], types.NewInterface(nil, nil)))
case "append":
if ellipsis || len(args) == 1 {
argStr := c.translateArgs(sig, args, ellipsis, false)
return c.formatExpr("$appendSlice(%s, %s)", argStr[0], argStr[1])
}
sliceType := sig.Results().At(0).Type().Underlying().(*types.Slice)
return c.formatExpr("$append(%e, %s)", args[0], strings.Join(c.translateExprSlice(args[1:], sliceType.Elem()), ", "))
case "delete":
keyType := c.p.TypeOf(args[0]).Underlying().(*types.Map).Key()
return c.formatExpr(`delete %e[%s.keyFor(%s)]`, args[0], c.typeName(keyType), c.translateImplicitConversion(args[1], keyType))
case "copy":
if basic, isBasic := c.p.TypeOf(args[1]).Underlying().(*types.Basic); isBasic && isString(basic) {
return c.formatExpr("$copyString(%e, %e)", args[0], args[1])
}
return c.formatExpr("$copySlice(%e, %e)", args[0], args[1])
case "print", "println":
return c.formatExpr("console.log(%s)", strings.Join(c.translateExprSlice(args, nil), ", "))
case "complex":
argStr := c.translateArgs(sig, args, ellipsis, false)
return c.formatExpr("new %s(%s, %s)", c.typeName(sig.Results().At(0).Type()), argStr[0], argStr[1])
case "real":
return c.formatExpr("%e.$real", args[0])
case "imag":
return c.formatExpr("%e.$imag", args[0])
case "recover":
return c.formatExpr("$recover()")
case "close":
return c.formatExpr(`$close(%e)`, args[0])
default:
panic(fmt.Sprintf("Unhandled builtin: %s\n", name))
}
}
func (c *funcContext) translateExpr(expr ast.Expr) *expression {
exprType := c.p.TypeOf(expr)
if value := c.p.Types[expr].Value; value != nil {
basic := exprType.Underlying().(*types.Basic)
switch {
case isBoolean(basic):
return c.formatExpr("%s", strconv.FormatBool(exact.BoolVal(value)))
case isInteger(basic):
if is64Bit(basic) {
if basic.Kind() == types.Int64 {
d, ok := exact.Int64Val(value)
if !ok {
panic("could not get exact uint")
}
return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatInt(d>>32, 10), strconv.FormatUint(uint64(d)&(1<<32-1), 10))
}
d, ok := exact.Uint64Val(value)
if !ok {
panic("could not get exact uint")
}
return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatUint(d>>32, 10), strconv.FormatUint(d&(1<<32-1), 10))
}
d, ok := exact.Int64Val(value)
if !ok {
panic("could not get exact int")
}
return c.formatExpr("%s", strconv.FormatInt(d, 10))
case isFloat(basic):
f, _ := exact.Float64Val(value)
return c.formatExpr("%s", strconv.FormatFloat(f, 'g', -1, 64))
case isComplex(basic):
r, _ := exact.Float64Val(exact.Real(value))
i, _ := exact.Float64Val(exact.Imag(value))
if basic.Kind() == types.UntypedComplex {
exprType = types.Typ[types.Complex128]
}
return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatFloat(r, 'g', -1, 64), strconv.FormatFloat(i, 'g', -1, 64))
case isString(basic):
return c.formatExpr("%s", encodeString(exact.StringVal(value)))
default:
panic("Unhandled constant type: " + basic.String())
}
}
var obj types.Object
switch e := expr.(type) {
case *ast.SelectorExpr:
obj = c.p.Uses[e.Sel]
case *ast.Ident:
obj = c.p.Defs[e]
if obj == nil {
obj = c.p.Uses[e]
}
}
if obj != nil && typesutil.IsJsPackage(obj.Pkg()) {
switch obj.Name() {
case "Global":
return c.formatExpr("$global")
case "Module":
return c.formatExpr("$module")
case "Undefined":
return c.formatExpr("undefined")
}
}
switch e := expr.(type) {
case *ast.CompositeLit:
if ptrType, isPointer := exprType.(*types.Pointer); isPointer {
exprType = ptrType.Elem()
}
collectIndexedElements := func(elementType types.Type) []string {
var elements []string
i := 0
zero := c.translateExpr(c.zeroValue(elementType)).String()
for _, element := range e.Elts {
if kve, isKve := element.(*ast.KeyValueExpr); isKve {
key, ok := exact.Int64Val(c.p.Types[kve.Key].Value)
if !ok {
panic("could not get exact int")
}
i = int(key)
element = kve.Value
}
for len(elements) <= i {
elements = append(elements, zero)
}
elements[i] = c.translateImplicitConversionWithCloning(element, elementType).String()
i++
}
return elements
}
switch t := exprType.Underlying().(type) {
case *types.Array:
elements := collectIndexedElements(t.Elem())
if len(elements) == 0 {
return c.formatExpr("%s.zero()", c.typeName(t))
}
zero := c.translateExpr(c.zeroValue(t.Elem())).String()
for len(elements) < int(t.Len()) {
elements = append(elements, zero)
}
return c.formatExpr(`$toNativeArray(%s, [%s])`, typeKind(t.Elem()), strings.Join(elements, ", "))
case *types.Slice:
return c.formatExpr("new %s([%s])", c.typeName(exprType), strings.Join(collectIndexedElements(t.Elem()), ", "))
case *types.Map:
entries := make([]string, len(e.Elts))
for i, element := range e.Elts {
kve := element.(*ast.KeyValueExpr)
entries[i] = fmt.Sprintf("{ k: %s, v: %s }", c.translateImplicitConversionWithCloning(kve.Key, t.Key()), c.translateImplicitConversionWithCloning(kve.Value, t.Elem()))
}
return c.formatExpr("$makeMap(%s.keyFor, [%s])", c.typeName(t.Key()), strings.Join(entries, ", "))
case *types.Struct:
elements := make([]string, t.NumFields())
isKeyValue := true
if len(e.Elts) != 0 {
_, isKeyValue = e.Elts[0].(*ast.KeyValueExpr)
}
if !isKeyValue {
for i, element := range e.Elts {
elements[i] = c.translateImplicitConversionWithCloning(element, t.Field(i).Type()).String()
}
}
if isKeyValue {
for i := range elements {
elements[i] = c.translateExpr(c.zeroValue(t.Field(i).Type())).String()
}
for _, element := range e.Elts {
kve := element.(*ast.KeyValueExpr)
for j := range elements {
if kve.Key.(*ast.Ident).Name == t.Field(j).Name() {
elements[j] = c.translateImplicitConversionWithCloning(kve.Value, t.Field(j).Type()).String()
break
}
}
}
}
return c.formatExpr("new %s.ptr(%s)", c.typeName(exprType), strings.Join(elements, ", "))
default:
panic(fmt.Sprintf("Unhandled CompositeLit type: %T\n", t))
}
case *ast.FuncLit:
_, fun := translateFunction(e.Type, nil, e.Body, c, exprType.(*types.Signature), c.p.FuncLitInfos[e], "")
if len(c.p.escapingVars) != 0 {
names := make([]string, 0, len(c.p.escapingVars))
for obj := range c.p.escapingVars {
names = append(names, c.p.objectNames[obj])
}
sort.Strings(names)
list := strings.Join(names, ", ")
return c.formatExpr("(function(%s) { return %s; })(%s)", list, fun, list)
}
return c.formatExpr("(%s)", fun)
case *ast.UnaryExpr:
t := c.p.TypeOf(e.X)
switch e.Op {
case token.AND:
if typesutil.IsJsObject(exprType) {
return c.formatExpr("%e.object", e.X)
}
switch t.Underlying().(type) {
case *types.Struct, *types.Array:
return c.translateExpr(e.X)
}
switch x := astutil.RemoveParens(e.X).(type) {
case *ast.CompositeLit:
return c.formatExpr("$newDataPointer(%e, %s)", x, c.typeName(c.p.TypeOf(e)))
case *ast.Ident:
obj := c.p.Uses[x].(*types.Var)
if c.p.escapingVars[obj] {
return c.formatExpr("(%1s.$ptr || (%1s.$ptr = new %2s(function() { return this.$target[0]; }, function($v) { this.$target[0] = $v; }, %1s)))", c.p.objectNames[obj], c.typeName(exprType))
}
return c.formatExpr(`(%1s || (%1s = new %2s(function() { return %3s; }, function($v) { %4s })))`, c.varPtrName(obj), c.typeName(exprType), c.objectName(obj), c.translateAssign(x, c.newIdent("$v", exprType), false))
case *ast.SelectorExpr:
sel, ok := c.p.Selections[x]
if !ok {
// qualified identifier
obj := c.p.Uses[x.Sel].(*types.Var)
return c.formatExpr(`(%1s || (%1s = new %2s(function() { return %3s; }, function($v) { %4s })))`, c.varPtrName(obj), c.typeName(exprType), c.objectName(obj), c.translateAssign(x, c.newIdent("$v", exprType), false))
}
newSel := &ast.SelectorExpr{X: c.newIdent("this.$target", c.p.TypeOf(x.X)), Sel: x.Sel}
c.setType(newSel, exprType)
c.p.Selections[newSel] = sel
return c.formatExpr("(%1e.$ptr_%2s || (%1e.$ptr_%2s = new %3s(function() { return %4e; }, function($v) { %5s }, %1e)))", x.X, x.Sel.Name, c.typeName(exprType), newSel, c.translateAssign(newSel, c.newIdent("$v", exprType), false))
case *ast.IndexExpr:
if _, ok := c.p.TypeOf(x.X).Underlying().(*types.Slice); ok {
return c.formatExpr("$indexPtr(%1e.$array, %1e.$offset + %2e, %3s)", x.X, x.Index, c.typeName(exprType))
}
return c.formatExpr("$indexPtr(%e, %e, %s)", x.X, x.Index, c.typeName(exprType))
case *ast.StarExpr:
return c.translateExpr(x.X)
default:
panic(fmt.Sprintf("Unhandled: %T\n", x))
}
case token.ARROW:
call := &ast.CallExpr{
Fun: c.newIdent("$recv", types.NewSignature(nil, types.NewTuple(types.NewVar(0, nil, "", t)), types.NewTuple(types.NewVar(0, nil, "", exprType), types.NewVar(0, nil, "", types.Typ[types.Bool])), false)),
Args: []ast.Expr{e.X},
}
c.Blocking[call] = true
if _, isTuple := exprType.(*types.Tuple); isTuple {
return c.formatExpr("%e", call)
}
return c.formatExpr("%e[0]", call)
}
basic := t.Underlying().(*types.Basic)
switch e.Op {
case token.ADD:
return c.translateExpr(e.X)
case token.SUB:
switch {
case is64Bit(basic):
return c.formatExpr("new %1s(-%2h, -%2l)", c.typeName(t), e.X)
case isComplex(basic):
return c.formatExpr("new %1s(-%2r, -%2i)", c.typeName(t), e.X)
case isUnsigned(basic):
return c.fixNumber(c.formatExpr("-%e", e.X), basic)
default:
return c.formatExpr("-%e", e.X)
}
case token.XOR:
if is64Bit(basic) {
return c.formatExpr("new %1s(~%2h, ~%2l >>> 0)", c.typeName(t), e.X)
}
return c.fixNumber(c.formatExpr("~%e", e.X), basic)
case token.NOT:
return c.formatExpr("!%e", e.X)
default:
panic(e.Op)
}
case *ast.BinaryExpr:
if e.Op == token.NEQ {
return c.formatExpr("!(%s)", c.translateExpr(&ast.BinaryExpr{
X: e.X,
Op: token.EQL,
Y: e.Y,
}))
}
t := c.p.TypeOf(e.X)
t2 := c.p.TypeOf(e.Y)
_, isInterface := t2.Underlying().(*types.Interface)
if isInterface || types.Identical(t, types.Typ[types.UntypedNil]) {
t = t2
}
if basic, isBasic := t.Underlying().(*types.Basic); isBasic && isNumeric(basic) {
if is64Bit(basic) {
switch e.Op {
case token.MUL:
return c.formatExpr("$mul64(%e, %e)", e.X, e.Y)
case token.QUO:
return c.formatExpr("$div64(%e, %e, false)", e.X, e.Y)
case token.REM:
return c.formatExpr("$div64(%e, %e, true)", e.X, e.Y)
case token.SHL:
return c.formatExpr("$shiftLeft64(%e, %f)", e.X, e.Y)
case token.SHR:
return c.formatExpr("$shiftRight%s(%e, %f)", toJavaScriptType(basic), e.X, e.Y)
case token.EQL:
return c.formatExpr("(%1h === %2h && %1l === %2l)", e.X, e.Y)
case token.LSS:
return c.formatExpr("(%1h < %2h || (%1h === %2h && %1l < %2l))", e.X, e.Y)
case token.LEQ:
return c.formatExpr("(%1h < %2h || (%1h === %2h && %1l <= %2l))", e.X, e.Y)
case token.GTR:
return c.formatExpr("(%1h > %2h || (%1h === %2h && %1l > %2l))", e.X, e.Y)
case token.GEQ:
return c.formatExpr("(%1h > %2h || (%1h === %2h && %1l >= %2l))", e.X, e.Y)
case token.ADD, token.SUB:
return c.formatExpr("new %3s(%1h %4t %2h, %1l %4t %2l)", e.X, e.Y, c.typeName(t), e.Op)
case token.AND, token.OR, token.XOR:
return c.formatExpr("new %3s(%1h %4t %2h, (%1l %4t %2l) >>> 0)", e.X, e.Y, c.typeName(t), e.Op)
case token.AND_NOT:
return c.formatExpr("new %3s(%1h & ~%2h, (%1l & ~%2l) >>> 0)", e.X, e.Y, c.typeName(t))
default:
panic(e.Op)
}
}
if isComplex(basic) {
switch e.Op {
case token.EQL:
return c.formatExpr("(%1r === %2r && %1i === %2i)", e.X, e.Y)
case token.ADD, token.SUB:
return c.formatExpr("new %3s(%1r %4t %2r, %1i %4t %2i)", e.X, e.Y, c.typeName(t), e.Op)
case token.MUL:
return c.formatExpr("new %3s(%1r * %2r - %1i * %2i, %1r * %2i + %1i * %2r)", e.X, e.Y, c.typeName(t))
case token.QUO:
return c.formatExpr("$divComplex(%e, %e)", e.X, e.Y)
default:
panic(e.Op)
}
}
switch e.Op {
case token.EQL:
return c.formatParenExpr("%e === %e", e.X, e.Y)
case token.LSS, token.LEQ, token.GTR, token.GEQ:
return c.formatExpr("%e %t %e", e.X, e.Op, e.Y)
case token.ADD, token.SUB:
return c.fixNumber(c.formatExpr("%e %t %e", e.X, e.Op, e.Y), basic)
case token.MUL:
switch basic.Kind() {
case types.Int32:
return c.formatParenExpr("(((%1e >>> 16 << 16) * %2e >> 0) + (%1e << 16 >>> 16) * %2e) >> 0", e.X, e.Y)
case types.Uint32, types.Uintptr:
return c.formatParenExpr("(((%1e >>> 16 << 16) * %2e >>> 0) + (%1e << 16 >>> 16) * %2e) >>> 0", e.X, e.Y)
}
return c.fixNumber(c.formatExpr("%e * %e", e.X, e.Y), basic)
case token.QUO:
if isInteger(basic) {
// cut off decimals
shift := ">>"
if isUnsigned(basic) {
shift = ">>>"
}
return c.formatExpr(`(%1s = %2e / %3e, (%1s === %1s && %1s !== 1/0 && %1s !== -1/0) ? %1s %4s 0 : $throwRuntimeError("integer divide by zero"))`, c.newVariable("_q"), e.X, e.Y, shift)
}
if basic.Kind() == types.Float32 {
return c.fixNumber(c.formatExpr("%e / %e", e.X, e.Y), basic)
}
return c.formatExpr("%e / %e", e.X, e.Y)
case token.REM:
return c.formatExpr(`(%1s = %2e %% %3e, %1s === %1s ? %1s : $throwRuntimeError("integer divide by zero"))`, c.newVariable("_r"), e.X, e.Y)
case token.SHL, token.SHR:
op := e.Op.String()
if e.Op == token.SHR && isUnsigned(basic) {
op = ">>>"
}
if c.p.Types[e.Y].Value != nil {
return c.fixNumber(c.formatExpr("%e %s %e", e.X, op, e.Y), basic)
}
if e.Op == token.SHR && !isUnsigned(basic) {
return c.fixNumber(c.formatParenExpr("%e >> $min(%e, 31)", e.X, e.Y), basic)
}
y := c.newVariable("y")
return c.fixNumber(c.formatExpr("(%s = %s, %s < 32 ? (%e %s %s) : 0)", y, c.translateImplicitConversion(e.Y, types.Typ[types.Uint]), y, e.X, op, y), basic)
case token.AND, token.OR:
if isUnsigned(basic) {
return c.formatParenExpr("(%e %t %e) >>> 0", e.X, e.Op, e.Y)
}
return c.formatParenExpr("%e %t %e", e.X, e.Op, e.Y)
case token.AND_NOT:
return c.fixNumber(c.formatParenExpr("%e & ~%e", e.X, e.Y), basic)
case token.XOR:
return c.fixNumber(c.formatParenExpr("%e ^ %e", e.X, e.Y), basic)
default:
panic(e.Op)
}
}
switch e.Op {
case token.ADD, token.LSS, token.LEQ, token.GTR, token.GEQ:
return c.formatExpr("%e %t %e", e.X, e.Op, e.Y)
case token.LAND:
if c.Blocking[e.Y] {
skipCase := c.caseCounter
c.caseCounter++
resultVar := c.newVariable("_v")
c.Printf("if (!(%s)) { %s = false; $s = %d; continue s; }", c.translateExpr(e.X), resultVar, skipCase)
c.Printf("%s = %s; case %d:", resultVar, c.translateExpr(e.Y), skipCase)
return c.formatExpr("%s", resultVar)
}
return c.formatExpr("%e && %e", e.X, e.Y)
case token.LOR:
if c.Blocking[e.Y] {
skipCase := c.caseCounter
c.caseCounter++
resultVar := c.newVariable("_v")
c.Printf("if (%s) { %s = true; $s = %d; continue s; }", c.translateExpr(e.X), resultVar, skipCase)
c.Printf("%s = %s; case %d:", resultVar, c.translateExpr(e.Y), skipCase)
return c.formatExpr("%s", resultVar)
}
return c.formatExpr("%e || %e", e.X, e.Y)
case token.EQL:
switch u := t.Underlying().(type) {
case *types.Array, *types.Struct:
return c.formatExpr("$equal(%e, %e, %s)", e.X, e.Y, c.typeName(t))
case *types.Interface:
return c.formatExpr("$interfaceIsEqual(%s, %s)", c.translateImplicitConversion(e.X, t), c.translateImplicitConversion(e.Y, t))
case *types.Pointer:
if _, ok := u.Elem().Underlying().(*types.Array); ok {
return c.formatExpr("$equal(%s, %s, %s)", c.translateImplicitConversion(e.X, t), c.translateImplicitConversion(e.Y, t), c.typeName(u.Elem()))
}
case *types.Basic:
if isBoolean(u) {
if b, ok := analysis.BoolValue(e.X, c.p.Info.Info); ok && b {
return c.translateExpr(e.Y)
}
if b, ok := analysis.BoolValue(e.Y, c.p.Info.Info); ok && b {
return c.translateExpr(e.X)
}
}
}
return c.formatExpr("%s === %s", c.translateImplicitConversion(e.X, t), c.translateImplicitConversion(e.Y, t))
default:
panic(e.Op)
}
case *ast.ParenExpr:
return c.formatParenExpr("%e", e.X)
case *ast.IndexExpr:
switch t := c.p.TypeOf(e.X).Underlying().(type) {
case *types.Array, *types.Pointer:
pattern := rangeCheck("%1e[%2f]", c.p.Types[e.Index].Value != nil, true)
if _, ok := t.(*types.Pointer); ok { // check pointer for nix (attribute getter causes a panic)
pattern = `(%1e.nilCheck, ` + pattern + `)`
}
return c.formatExpr(pattern, e.X, e.Index)
case *types.Slice:
return c.formatExpr(rangeCheck("%1e.$array[%1e.$offset + %2f]", c.p.Types[e.Index].Value != nil, false), e.X, e.Index)
case *types.Map:
if typesutil.IsJsObject(c.p.TypeOf(e.Index)) {
c.p.errList = append(c.p.errList, types.Error{Fset: c.p.fileSet, Pos: e.Index.Pos(), Msg: "cannot use js.Object as map key"})
}
key := fmt.Sprintf("%s.keyFor(%s)", c.typeName(t.Key()), c.translateImplicitConversion(e.Index, t.Key()))
if _, isTuple := exprType.(*types.Tuple); isTuple {
return c.formatExpr(`(%1s = %2e[%3s], %1s !== undefined ? [%1s.v, true] : [%4e, false])`, c.newVariable("_entry"), e.X, key, c.zeroValue(t.Elem()))
}
return c.formatExpr(`(%1s = %2e[%3s], %1s !== undefined ? %1s.v : %4e)`, c.newVariable("_entry"), e.X, key, c.zeroValue(t.Elem()))
case *types.Basic:
return c.formatExpr("%e.charCodeAt(%f)", e.X, e.Index)
default:
panic(fmt.Sprintf("Unhandled IndexExpr: %T\n", t))
}
case *ast.SliceExpr:
if b, isBasic := c.p.TypeOf(e.X).Underlying().(*types.Basic); isBasic && isString(b) {
switch {
case e.Low == nil && e.High == nil:
return c.translateExpr(e.X)
case e.Low == nil:
return c.formatExpr("%e.substring(0, %f)", e.X, e.High)
case e.High == nil:
return c.formatExpr("%e.substring(%f)", e.X, e.Low)
default:
return c.formatExpr("%e.substring(%f, %f)", e.X, e.Low, e.High)
}
}
slice := c.translateConversionToSlice(e.X, exprType)
switch {
case e.Low == nil && e.High == nil:
return c.formatExpr("%s", slice)
case e.Low == nil:
if e.Max != nil {
return c.formatExpr("$subslice(%s, 0, %f, %f)", slice, e.High, e.Max)
}
return c.formatExpr("$subslice(%s, 0, %f)", slice, e.High)
case e.High == nil:
return c.formatExpr("$subslice(%s, %f)", slice, e.Low)
default:
if e.Max != nil {
return c.formatExpr("$subslice(%s, %f, %f, %f)", slice, e.Low, e.High, e.Max)
}
return c.formatExpr("$subslice(%s, %f, %f)", slice, e.Low, e.High)
}
case *ast.SelectorExpr:
sel, ok := c.p.Selections[e]
if !ok {
// qualified identifier
return c.formatExpr("%s", c.objectName(obj))
}
switch sel.Kind() {
case types.FieldVal:
fields, jsTag := c.translateSelection(sel, e.Pos())
if jsTag != "" {
if _, ok := sel.Type().(*types.Signature); ok {
return c.formatExpr("$internalize(%1e.%2s.%3s, %4s, %1e.%2s)", e.X, strings.Join(fields, "."), jsTag, c.typeName(sel.Type()))
}
return c.internalize(c.formatExpr("%e.%s.%s", e.X, strings.Join(fields, "."), jsTag), sel.Type())
}
return c.formatExpr("%e.%s", e.X, strings.Join(fields, "."))
case types.MethodVal:
recv := c.makeReceiver(e.X, sel)
return c.formatExpr(`$methodVal(%s, "%s")`, recv, sel.Obj().(*types.Func).Name())
case types.MethodExpr:
if !sel.Obj().Exported() {
c.p.dependencies[sel.Obj()] = true
}
return c.formatExpr(`$methodExpr(%s, "%s")`, c.typeName(sel.Recv()), sel.Obj().(*types.Func).Name())
default:
panic(fmt.Sprintf("unexpected sel.Kind(): %T", sel.Kind()))
}
case *ast.CallExpr:
plainFun := astutil.RemoveParens(e.Fun)
if astutil.IsTypeExpr(plainFun, c.p.Info.Info) {
return c.formatExpr("%s", c.translateConversion(e.Args[0], c.p.TypeOf(plainFun)))
}
sig := c.p.TypeOf(plainFun).Underlying().(*types.Signature)
switch f := plainFun.(type) {
case *ast.Ident:
obj := c.p.Uses[f]
if o, ok := obj.(*types.Builtin); ok {
return c.translateBuiltin(o.Name(), sig, e.Args, e.Ellipsis.IsValid())
}
if typesutil.IsJsPackage(obj.Pkg()) && obj.Name() == "InternalObject" {
return c.translateExpr(e.Args[0])
}
return c.translateCall(e, sig, c.translateExpr(f))
case *ast.SelectorExpr:
sel, ok := c.p.Selections[f]
if !ok {
// qualified identifier
obj := c.p.Uses[f.Sel]
if typesutil.IsJsPackage(obj.Pkg()) {
switch obj.Name() {
case "Debugger":
return c.formatExpr("debugger")
case "InternalObject":
return c.translateExpr(e.Args[0])
case "MakeFunc":
return c.formatExpr("(function() { return $externalize(%e(this, new ($sliceType($jsObjectPtr))($global.Array.prototype.slice.call(arguments, []))), $emptyInterface); })", e.Args[0])
}
}
return c.translateCall(e, sig, c.translateExpr(f))
}
externalizeExpr := func(e ast.Expr) string {
t := c.p.TypeOf(e)
if types.Identical(t, types.Typ[types.UntypedNil]) {
return "null"
}
return c.externalize(c.translateExpr(e).String(), t)
}
externalizeArgs := func(args []ast.Expr) string {
s := make([]string, len(args))
for i, arg := range args {
s[i] = externalizeExpr(arg)
}
return strings.Join(s, ", ")
}
switch sel.Kind() {
case types.MethodVal:
recv := c.makeReceiver(f.X, sel)
if typesutil.IsJsPackage(sel.Obj().Pkg()) {
globalRef := func(id string) string {
if recv.String() == "$global" && id[0] == '$' {
return id
}
return recv.String() + "." + id
}
switch sel.Obj().Name() {
case "Get":
if id, ok := c.identifierConstant(e.Args[0]); ok {
return c.formatExpr("%s", globalRef(id))
}
return c.formatExpr("%s[$externalize(%e, $String)]", recv, e.Args[0])
case "Set":
if id, ok := c.identifierConstant(e.Args[0]); ok {
return c.formatExpr("%s = %s", globalRef(id), externalizeExpr(e.Args[1]))
}
return c.formatExpr("%s[$externalize(%e, $String)] = %s", recv, e.Args[0], externalizeExpr(e.Args[1]))
case "Delete":
return c.formatExpr("delete %s[$externalize(%e, $String)]", recv, e.Args[0])
case "Length":
return c.formatExpr("$parseInt(%s.length)", recv)
case "Index":
return c.formatExpr("%s[%e]", recv, e.Args[0])
case "SetIndex":
return c.formatExpr("%s[%e] = %s", recv, e.Args[0], externalizeExpr(e.Args[1]))
case "Call":
if id, ok := c.identifierConstant(e.Args[0]); ok {
if e.Ellipsis.IsValid() {
objVar := c.newVariable("obj")
return c.formatExpr("(%s = %s, %s.%s.apply(%s, %s))", objVar, recv, objVar, id, objVar, externalizeExpr(e.Args[1]))
}
return c.formatExpr("%s(%s)", globalRef(id), externalizeArgs(e.Args[1:]))
}
if e.Ellipsis.IsValid() {
objVar := c.newVariable("obj")
return c.formatExpr("(%s = %s, %s[$externalize(%e, $String)].apply(%s, %s))", objVar, recv, objVar, e.Args[0], objVar, externalizeExpr(e.Args[1]))
}
return c.formatExpr("%s[$externalize(%e, $String)](%s)", recv, e.Args[0], externalizeArgs(e.Args[1:]))
case "Invoke":
if e.Ellipsis.IsValid() {
return c.formatExpr("%s.apply(undefined, %s)", recv, externalizeExpr(e.Args[0]))
}
return c.formatExpr("%s(%s)", recv, externalizeArgs(e.Args))
case "New":
if e.Ellipsis.IsValid() {
return c.formatExpr("new ($global.Function.prototype.bind.apply(%s, [undefined].concat(%s)))", recv, externalizeExpr(e.Args[0]))
}
return c.formatExpr("new (%s)(%s)", recv, externalizeArgs(e.Args))
case "Bool":
return c.internalize(recv, types.Typ[types.Bool])
case "String":
return c.internalize(recv, types.Typ[types.String])
case "Int":
return c.internalize(recv, types.Typ[types.Int])
case "Int64":
return c.internalize(recv, types.Typ[types.Int64])
case "Uint64":
return c.internalize(recv, types.Typ[types.Uint64])
case "Float":
return c.internalize(recv, types.Typ[types.Float64])
case "Interface":
return c.internalize(recv, types.NewInterface(nil, nil))
case "Unsafe":
return recv
default:
panic("Invalid js package object: " + sel.Obj().Name())
}
}
methodName := sel.Obj().Name()
if reservedKeywords[methodName] {
methodName += "$"
}
return c.translateCall(e, sig, c.formatExpr("%s.%s", recv, methodName))
case types.FieldVal:
fields, jsTag := c.translateSelection(sel, f.Pos())
if jsTag != "" {
call := c.formatExpr("%e.%s.%s(%s)", f.X, strings.Join(fields, "."), jsTag, externalizeArgs(e.Args))
switch sig.Results().Len() {
case 0:
return call
case 1:
return c.internalize(call, sig.Results().At(0).Type())
default:
c.p.errList = append(c.p.errList, types.Error{Fset: c.p.fileSet, Pos: f.Pos(), Msg: "field with js tag can not have func type with multiple results"})
}
}
return c.translateCall(e, sig, c.formatExpr("%e.%s", f.X, strings.Join(fields, ".")))
case types.MethodExpr:
return c.translateCall(e, sig, c.translateExpr(f))
default:
panic(fmt.Sprintf("unexpected sel.Kind(): %T", sel.Kind()))
}
default:
return c.translateCall(e, sig, c.translateExpr(plainFun))
}
case *ast.StarExpr:
if typesutil.IsJsObject(c.p.TypeOf(e.X)) {
return c.formatExpr("new $jsObjectPtr(%e)", e.X)
}
if c1, isCall := e.X.(*ast.CallExpr); isCall && len(c1.Args) == 1 {
if c2, isCall := c1.Args[0].(*ast.CallExpr); isCall && len(c2.Args) == 1 && types.Identical(c.p.TypeOf(c2.Fun), types.Typ[types.UnsafePointer]) {
if unary, isUnary := c2.Args[0].(*ast.UnaryExpr); isUnary && unary.Op == token.AND {
return c.translateExpr(unary.X) // unsafe conversion
}
}
}
switch exprType.Underlying().(type) {
case *types.Struct, *types.Array:
return c.translateExpr(e.X)
}
return c.formatExpr("%e.$get()", e.X)
case *ast.TypeAssertExpr:
if e.Type == nil {
return c.translateExpr(e.X)
}
t := c.p.TypeOf(e.Type)
if _, isTuple := exprType.(*types.Tuple); isTuple {
return c.formatExpr("$assertType(%e, %s, true)", e.X, c.typeName(t))
}
return c.formatExpr("$assertType(%e, %s)", e.X, c.typeName(t))
case *ast.Ident:
if e.Name == "_" {
panic("Tried to translate underscore identifier.")
}
switch o := obj.(type) {
case *types.Var, *types.Const:
return c.formatExpr("%s", c.objectName(o))
case *types.Func:
return c.formatExpr("%s", c.objectName(o))
case *types.TypeName:
return c.formatExpr("%s", c.typeName(o.Type()))
case *types.Nil:
if typesutil.IsJsObject(exprType) {
return c.formatExpr("null")
}
switch t := exprType.Underlying().(type) {
case *types.Basic:
if t.Kind() != types.UnsafePointer {
panic("unexpected basic type")
}
return c.formatExpr("0")
case *types.Slice, *types.Pointer, *types.Chan:
return c.formatExpr("%s.nil", c.typeName(exprType))
case *types.Map:
return c.formatExpr("false")
case *types.Interface:
return c.formatExpr("$ifaceNil")
case *types.Signature:
return c.formatExpr("$throwNilPointerError")
default:
panic(fmt.Sprintf("unexpected type: %T", t))
}
default:
panic(fmt.Sprintf("Unhandled object: %T\n", o))
}
case *this:
if isWrapped(c.p.TypeOf(e)) {
return c.formatExpr("this.$val")
}
return c.formatExpr("this")
case nil:
return c.formatExpr("")
default:
panic(fmt.Sprintf("Unhandled expression: %T\n", e))
}
}
func (p *importer) typ() types.Type {
// if the type was seen before, i is its index (>= 0)
i := p.int()
if i >= 0 {
return p.typList[i]
}
// otherwise, i is the type tag (< 0)
switch i {
case arrayTag:
t := new(types.Array)
p.record(t)
n := p.int64()
*t = *types.NewArray(p.typ(), n)
return t
case sliceTag:
t := new(types.Slice)
p.record(t)
*t = *types.NewSlice(p.typ())
return t
case structTag:
t := new(types.Struct)
p.record(t)
n := p.int()
fields := make([]*types.Var, n)
tags := make([]string, n)
for i := range fields {
fields[i] = p.field()
tags[i] = p.string()
}
*t = *types.NewStruct(fields, tags)
return t
case pointerTag:
t := new(types.Pointer)
p.record(t)
*t = *types.NewPointer(p.typ())
return t
case signatureTag:
t := new(types.Signature)
p.record(t)
*t = *p.signature()
return t
case interfaceTag:
// Create a dummy entry in the type list. This is safe because we
// cannot expect the interface type to appear in a cycle, as any
// such cycle must contain a named type which would have been
// first defined earlier.
n := len(p.typList)
p.record(nil)
// read embedded interfaces
embeddeds := make([]*types.Named, p.int())
for i := range embeddeds {
embeddeds[i] = p.typ().(*types.Named)
}
// read methods
methods := make([]*types.Func, p.int())
for i := range methods {
pkg, name := p.qualifiedName()
methods[i] = types.NewFunc(token.NoPos, pkg, name, p.typ().(*types.Signature))
}
t := types.NewInterface(methods, embeddeds)
p.typList[n] = t
return t
case mapTag:
t := new(types.Map)
p.record(t)
*t = *types.NewMap(p.typ(), p.typ())
return t
case chanTag:
t := new(types.Chan)
p.record(t)
*t = *types.NewChan(types.ChanDir(p.int()), p.typ())
return t
case namedTag:
// read type object
name := p.string()
pkg := p.pkg()
scope := pkg.Scope()
obj := scope.Lookup(name)
// if the object doesn't exist yet, create and insert it
if obj == nil {
obj = types.NewTypeName(token.NoPos, pkg, name, nil)
scope.Insert(obj)
}
// associate new named type with obj if it doesn't exist yet
t0 := types.NewNamed(obj.(*types.TypeName), nil, nil)
// but record the existing type, if any
t := obj.Type().(*types.Named)
p.record(t)
// read underlying type
t0.SetUnderlying(p.typ())
// read associated methods
for i, n := 0, p.int(); i < n; i++ {
t0.AddMethod(types.NewFunc(token.NoPos, pkg, p.string(), p.typ().(*types.Signature)))
}
return t
default:
panic(fmt.Sprintf("unexpected type tag %d", i))
}
}
// TODO(adonovan): move the constraint definitions and the store() etc
// functions which add them (and are also used by the solver) into a
// new file, constraints.go.
import (
"fmt"
"go/token"
"golang.org/x/tools/go/callgraph"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/types"
)
var (
tEface = types.NewInterface(nil, nil).Complete()
tInvalid = types.Typ[types.Invalid]
tUnsafePtr = types.Typ[types.UnsafePointer]
)
// ---------- Node creation ----------
// nextNode returns the index of the next unused node.
func (a *analysis) nextNode() nodeid {
return nodeid(len(a.nodes))
}
// addNodes creates nodes for all scalar elements in type typ, and
// returns the id of the first one, or zero if the type was
// analytically uninteresting.
//
func newRuntimeInterface(module llvm.Module, tm *llvmTypeMap) (*runtimeInterface, error) {
var ri runtimeInterface
Bool := types.Typ[types.Bool]
Complex128 := types.Typ[types.Complex128]
Float64 := types.Typ[types.Float64]
Int32 := types.Typ[types.Int32]
Int64 := types.Typ[types.Int64]
Int := types.Typ[types.Int]
Rune := types.Typ[types.Rune]
String := types.Typ[types.String]
Uintptr := types.Typ[types.Uintptr]
UnsafePointer := types.Typ[types.UnsafePointer]
EmptyInterface := types.NewInterface(nil, nil)
IntSlice := types.NewSlice(types.Typ[types.Int])
for _, rt := range [...]struct {
name string
rfi *runtimeFnInfo
args, res []types.Type
attrs []llvm.Attribute
}{
{
name: "__go_append",
rfi: &ri.append,
args: []types.Type{IntSlice, UnsafePointer, Uintptr, Uintptr},
res: []types.Type{IntSlice},
},
{
name: "__go_assert_interface",
rfi: &ri.assertInterface,
args: []types.Type{UnsafePointer, UnsafePointer},
res: []types.Type{UnsafePointer},
},
{
name: "__go_can_recover",
rfi: &ri.canRecover,
args: []types.Type{UnsafePointer},
res: []types.Type{Bool},
},
{
name: "__go_chan_cap",
rfi: &ri.chanCap,
args: []types.Type{UnsafePointer},
res: []types.Type{Int},
},
{
name: "__go_chan_len",
rfi: &ri.chanLen,
args: []types.Type{UnsafePointer},
res: []types.Type{Int},
},
{
name: "runtime.chanrecv2",
rfi: &ri.chanrecv2,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
res: []types.Type{Bool},
},
{
name: "__go_check_defer",
rfi: &ri.checkDefer,
args: []types.Type{UnsafePointer},
},
{
name: "__go_check_interface_type",
rfi: &ri.checkInterfaceType,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
},
{
name: "__go_builtin_close",
rfi: &ri.builtinClose,
args: []types.Type{UnsafePointer},
},
{
name: "__go_convert_interface",
rfi: &ri.convertInterface,
args: []types.Type{UnsafePointer, UnsafePointer},
res: []types.Type{UnsafePointer},
},
{
name: "__go_copy",
rfi: &ri.copy,
args: []types.Type{UnsafePointer, UnsafePointer, Uintptr},
},
{
name: "__go_defer",
rfi: &ri.Defer,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
},
{
name: "__go_deferred_recover",
rfi: &ri.deferredRecover,
res: []types.Type{EmptyInterface},
},
{
name: "__go_empty_interface_compare",
rfi: &ri.emptyInterfaceCompare,
args: []types.Type{EmptyInterface, EmptyInterface},
res: []types.Type{Int},
},
{
name: "__go_get_closure",
rfi: &ri.getClosure,
res: []types.Type{UnsafePointer},
},
{
name: "__go_go",
rfi: &ri.Go,
args: []types.Type{UnsafePointer, UnsafePointer},
},
{
name: "runtime.ifaceE2I2",
rfi: &ri.ifaceE2I2,
args: []types.Type{UnsafePointer, EmptyInterface},
res: []types.Type{EmptyInterface, Bool},
},
{
name: "runtime.ifaceI2I2",
rfi: &ri.ifaceI2I2,
args: []types.Type{UnsafePointer, EmptyInterface},
res: []types.Type{EmptyInterface, Bool},
},
{
name: "__go_int_array_to_string",
rfi: &ri.intArrayToString,
args: []types.Type{UnsafePointer, Int},
res: []types.Type{String},
},
{
name: "__go_int_to_string",
rfi: &ri.intToString,
args: []types.Type{Int},
res: []types.Type{String},
},
{
name: "__go_interface_compare",
rfi: &ri.interfaceCompare,
args: []types.Type{EmptyInterface, EmptyInterface},
res: []types.Type{Int},
},
{
name: "__go_make_slice2",
rfi: &ri.makeSlice,
args: []types.Type{UnsafePointer, Uintptr, Uintptr},
res: []types.Type{IntSlice},
},
{
name: "runtime.mapdelete",
rfi: &ri.mapdelete,
args: []types.Type{UnsafePointer, UnsafePointer},
},
{
name: "runtime.mapiter2",
rfi: &ri.mapiter2,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
},
{
name: "runtime.mapiterinit",
rfi: &ri.mapiterinit,
args: []types.Type{UnsafePointer, UnsafePointer},
},
{
name: "runtime.mapiternext",
rfi: &ri.mapiternext,
args: []types.Type{UnsafePointer},
},
{
name: "__go_map_index",
rfi: &ri.mapIndex,
args: []types.Type{UnsafePointer, UnsafePointer, Bool},
res: []types.Type{UnsafePointer},
},
{
name: "__go_map_len",
rfi: &ri.mapLen,
args: []types.Type{UnsafePointer},
res: []types.Type{Int},
},
{
name: "__go_new",
rfi: &ri.New,
args: []types.Type{Uintptr},
res: []types.Type{UnsafePointer},
},
{
name: "__go_new_channel",
rfi: &ri.newChannel,
args: []types.Type{UnsafePointer, Uintptr},
res: []types.Type{UnsafePointer},
},
{
name: "__go_new_map",
rfi: &ri.newMap,
args: []types.Type{UnsafePointer, Uintptr},
res: []types.Type{UnsafePointer},
},
{
name: "__go_new_nopointers",
rfi: &ri.NewNopointers,
args: []types.Type{Uintptr},
res: []types.Type{UnsafePointer},
},
{
name: "runtime.newselect",
rfi: &ri.newSelect,
args: []types.Type{Int32},
res: []types.Type{UnsafePointer},
},
{
name: "__go_panic",
rfi: &ri.panic,
args: []types.Type{EmptyInterface},
attrs: []llvm.Attribute{llvm.NoReturnAttribute},
},
{
name: "__go_print_bool",
rfi: &ri.printBool,
args: []types.Type{Bool},
},
{
name: "__go_print_complex",
rfi: &ri.printComplex,
args: []types.Type{Complex128},
},
{
name: "__go_print_double",
rfi: &ri.printDouble,
args: []types.Type{Float64},
},
{
name: "__go_print_empty_interface",
rfi: &ri.printEmptyInterface,
args: []types.Type{EmptyInterface},
},
{
name: "__go_print_interface",
rfi: &ri.printInterface,
args: []types.Type{EmptyInterface},
},
{
name: "__go_print_int64",
rfi: &ri.printInt64,
args: []types.Type{Int64},
},
{
name: "__go_print_nl",
rfi: &ri.printNl,
},
{
name: "__go_print_pointer",
rfi: &ri.printPointer,
args: []types.Type{UnsafePointer},
},
{
name: "__go_print_slice",
rfi: &ri.printSlice,
args: []types.Type{IntSlice},
},
{
name: "__go_print_space",
rfi: &ri.printSpace,
},
{
name: "__go_print_string",
rfi: &ri.printString,
args: []types.Type{String},
},
{
name: "__go_print_uint64",
rfi: &ri.printUint64,
args: []types.Type{Int64},
},
{
name: "__go_receive",
rfi: &ri.receive,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
},
{
name: "__go_recover",
rfi: &ri.recover,
res: []types.Type{EmptyInterface},
},
{
name: "__go_register_gc_roots",
rfi: &ri.registerGcRoots,
args: []types.Type{UnsafePointer},
},
{
name: "__go_runtime_error",
rfi: &ri.runtimeError,
args: []types.Type{Int32},
attrs: []llvm.Attribute{llvm.NoReturnAttribute},
},
{
name: "runtime.selectdefault",
rfi: &ri.selectdefault,
args: []types.Type{UnsafePointer, Int32},
},
{
name: "runtime.selectgo",
rfi: &ri.selectgo,
args: []types.Type{UnsafePointer},
res: []types.Type{Int},
},
{
name: "runtime.selectrecv2",
rfi: &ri.selectrecv2,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, Int32},
},
{
name: "runtime.selectsend",
rfi: &ri.selectsend,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer, Int32},
},
{
name: "__go_send_big",
rfi: &ri.sendBig,
args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
},
{
name: "__go_set_closure",
rfi: &ri.setClosure,
args: []types.Type{UnsafePointer},
},
{
name: "__go_set_defer_retaddr",
rfi: &ri.setDeferRetaddr,
args: []types.Type{UnsafePointer},
res: []types.Type{Bool},
},
{
name: "__go_strcmp",
rfi: &ri.strcmp,
args: []types.Type{String, String},
res: []types.Type{Int},
},
{
name: "__go_string_plus",
rfi: &ri.stringPlus,
args: []types.Type{String, String},
res: []types.Type{String},
},
{
name: "__go_string_slice",
rfi: &ri.stringSlice,
args: []types.Type{String, Int, Int},
res: []types.Type{String},
},
{
name: "__go_string_to_int_array",
rfi: &ri.stringToIntArray,
args: []types.Type{String},
res: []types.Type{IntSlice},
},
{
name: "runtime.stringiter2",
rfi: &ri.stringiter2,
args: []types.Type{String, Int},
res: []types.Type{Int, Rune},
},
{
name: "__go_type_descriptors_equal",
rfi: &ri.typeDescriptorsEqual,
args: []types.Type{UnsafePointer, UnsafePointer},
res: []types.Type{Bool},
},
{
name: "__go_undefer",
rfi: &ri.undefer,
args: []types.Type{UnsafePointer},
},
} {
rt.rfi.init(tm, module, rt.name, rt.args, rt.res)
for _, attr := range rt.attrs {
rt.rfi.fn.AddFunctionAttr(attr)
}
}
memsetName := "llvm.memset.p0i8.i" + strconv.Itoa(tm.target.IntPtrType().IntTypeWidth())
memsetType := llvm.FunctionType(
llvm.VoidType(),
[]llvm.Type{
llvm.PointerType(llvm.Int8Type(), 0),
llvm.Int8Type(),
tm.target.IntPtrType(),
llvm.Int32Type(),
llvm.Int1Type(),
},
false,
)
ri.memset = llvm.AddFunction(module, memsetName, memsetType)
memcpyName := "llvm.memcpy.p0i8.p0i8.i" + strconv.Itoa(tm.target.IntPtrType().IntTypeWidth())
memcpyType := llvm.FunctionType(
llvm.VoidType(),
[]llvm.Type{
llvm.PointerType(llvm.Int8Type(), 0),
llvm.PointerType(llvm.Int8Type(), 0),
tm.target.IntPtrType(),
llvm.Int32Type(),
llvm.Int1Type(),
},
false,
)
ri.memcpy = llvm.AddFunction(module, memcpyName, memcpyType)
returnaddressType := llvm.FunctionType(
llvm.PointerType(llvm.Int8Type(), 0),
[]llvm.Type{llvm.Int32Type()},
false,
)
ri.returnaddress = llvm.AddFunction(module, "llvm.returnaddress", returnaddressType)
gccgoPersonalityType := llvm.FunctionType(
llvm.Int32Type(),
[]llvm.Type{
llvm.Int32Type(),
llvm.Int64Type(),
llvm.PointerType(llvm.Int8Type(), 0),
llvm.PointerType(llvm.Int8Type(), 0),
},
false,
)
ri.gccgoPersonality = llvm.AddFunction(module, "__gccgo_personality_v0", gccgoPersonalityType)
ri.gccgoExceptionType = llvm.StructType(
[]llvm.Type{
llvm.PointerType(llvm.Int8Type(), 0),
llvm.Int32Type(),
},
false,
)
return &ri, nil
}