softonik/tinygo
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Код Задачи Слияния Проекты Выпуски Пакеты Вики Активность Действия

compiler: do not return an error from getLLVMType

Просмотр исходного кода 
This commit replaces "unknown type" errors in getLLVMType with panics.

The main reason this is done is that it simplifies the code *a lot*.
Many `if err != nil` lines were there just because of type information.
Additionally, simply panicking is probably a better approach as the only
way this error can be produced is either with big new language features
or a serious compiler bug. Panicking is probably a better way to handle
this error anyway.
Этот коммит содержится в:
Ayke van Laethem 2019-04-21 14:34:37 +02:00 • коммит произвёл Ron Evans
родитель 6d23809218
коммит c25fe609a9
6 изменённых файлов: 101 добавлений и 293 удалений
Показать статистику Скачать .patch Скачать .diff Показать все файлы Свернуть все файлы

20
compiler/channel.go
Просмотреть файл

@ -12,10 +12,7 @@ import (
// emitMakeChan returns a new channel value for the given channel type.
func (c *Compiler) emitMakeChan(expr *ssa.MakeChan) (llvm.Value, error) {
valueType, err := c.getLLVMType(expr.Type().(*types.Chan).Elem())
if err != nil {
return llvm.Value{}, err
}
valueType := c.getLLVMType(expr.Type().(*types.Chan).Elem())
if c.targetData.TypeAllocSize(valueType) > c.targetData.TypeAllocSize(c.intType) {
// Values bigger than int overflow the data part of the coroutine.
// TODO: make the coroutine data part big enough to hold these bigger
@ -33,10 +30,7 @@ func (c *Compiler) emitMakeChan(expr *ssa.MakeChan) (llvm.Value, error) {
// emitChanSend emits a pseudo chan send operation. It is lowered to the actual
// channel send operation during goroutine lowering.
func (c *Compiler) emitChanSend(frame *Frame, instr *ssa.Send) error {
valueType, err := c.getLLVMType(instr.Chan.Type().(*types.Chan).Elem())
if err != nil {
return err
}
valueType := c.getLLVMType(instr.Chan.Type().(*types.Chan).Elem())
ch, err := c.parseExpr(frame, instr.Chan)
if err != nil {
return err
@ -56,10 +50,7 @@ func (c *Compiler) emitChanSend(frame *Frame, instr *ssa.Send) error {
// emitChanRecv emits a pseudo chan receive operation. It is lowered to the
// actual channel receive operation during goroutine lowering.
func (c *Compiler) emitChanRecv(frame *Frame, unop *ssa.UnOp) (llvm.Value, error) {
valueType, err := c.getLLVMType(unop.X.Type().(*types.Chan).Elem())
if err != nil {
return llvm.Value{}, err
}
valueType := c.getLLVMType(unop.X.Type().(*types.Chan).Elem())
valueSize := llvm.ConstInt(c.uintptrType, c.targetData.TypeAllocSize(valueType), false)
ch, err := c.parseExpr(frame, unop.X)
if err != nil {
@ -83,11 +74,8 @@ func (c *Compiler) emitChanRecv(frame *Frame, unop *ssa.UnOp) (llvm.Value, error
// emitChanClose closes the given channel.
func (c *Compiler) emitChanClose(frame *Frame, param ssa.Value) error {
valueType, err := c.getLLVMType(param.Type().(*types.Chan).Elem())
valueType := c.getLLVMType(param.Type().(*types.Chan).Elem())
valueSize := llvm.ConstInt(c.uintptrType, c.targetData.TypeAllocSize(valueType), false)
if err != nil {
return err
}
ch, err := c.parseExpr(frame, param)
if err != nil {
return err

274
compiler/compiler.go
Просмотреть файл

@ -274,10 +274,7 @@ func (c *Compiler) Compile(mainPath string) error {
for _, t := range c.ir.NamedTypes {
if named, ok := t.Type.Type().(*types.Named); ok {
if st, ok := named.Underlying().(*types.Struct); ok {
llvmType, err := c.getLLVMType(st)
if err != nil {
return err
}
llvmType := c.getLLVMType(st)
t.LLVMType.StructSetBody(llvmType.StructElementTypes(), false)
}
}
@ -286,10 +283,7 @@ func (c *Compiler) Compile(mainPath string) error {
// Declare all globals.
for _, g := range c.ir.Globals {
typ := g.Type().(*types.Pointer).Elem()
llvmType, err := c.getLLVMType(typ)
if err != nil {
return err
}
llvmType := c.getLLVMType(typ)
global := c.mod.NamedGlobal(g.LinkName())
if global.IsNil() {
global = llvm.AddGlobal(c.mod, llvmType, g.LinkName())
@ -303,11 +297,7 @@ func (c *Compiler) Compile(mainPath string) error {
// Declare all functions.
for _, f := range c.ir.Functions {
frame, err := c.parseFuncDecl(f)
if err != nil {
return err
}
frames = append(frames, frame)
frames = append(frames, c.parseFuncDecl(f))
}
// Add definitions to declarations.
@ -330,10 +320,7 @@ func (c *Compiler) Compile(mainPath string) error {
// Define the already declared functions that wrap methods for use in
// interfaces.
for _, state := range c.interfaceInvokeWrappers {
err = c.createInterfaceInvokeWrapper(state)
if err != nil {
return err
}
c.createInterfaceInvokeWrapper(state)
}
// After all packages are imported, add a synthetic initializer function
@ -342,10 +329,7 @@ func (c *Compiler) Compile(mainPath string) error {
initFn.LLVMFn.SetLinkage(llvm.InternalLinkage)
initFn.LLVMFn.SetUnnamedAddr(true)
if c.Debug {
difunc, err := c.attachDebugInfo(initFn)
if err != nil {
return err
}
difunc := c.attachDebugInfo(initFn)
pos := c.ir.Program.Fset.Position(initFn.Pos())
c.builder.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), difunc, llvm.Metadata{})
}
@ -411,87 +395,74 @@ func (c *Compiler) Compile(mainPath string) error {
return nil
}
func (c *Compiler) getLLVMType(goType types.Type) (llvm.Type, error) {
func (c *Compiler) getLLVMType(goType types.Type) llvm.Type {
switch typ := goType.(type) {
case *types.Array:
elemType, err := c.getLLVMType(typ.Elem())
if err != nil {
return llvm.Type{}, err
}
return llvm.ArrayType(elemType, int(typ.Len())), nil
elemType := c.getLLVMType(typ.Elem())
return llvm.ArrayType(elemType, int(typ.Len()))
case *types.Basic:
switch typ.Kind() {
case types.Bool, types.UntypedBool:
return c.ctx.Int1Type(), nil
return c.ctx.Int1Type()
case types.Int8, types.Uint8:
return c.ctx.Int8Type(), nil
return c.ctx.Int8Type()
case types.Int16, types.Uint16:
return c.ctx.Int16Type(), nil
return c.ctx.Int16Type()
case types.Int32, types.Uint32:
return c.ctx.Int32Type(), nil
return c.ctx.Int32Type()
case types.Int, types.Uint:
return c.intType, nil
return c.intType
case types.Int64, types.Uint64:
return c.ctx.Int64Type(), nil
return c.ctx.Int64Type()
case types.Float32:
return c.ctx.FloatType(), nil
return c.ctx.FloatType()
case types.Float64:
return c.ctx.DoubleType(), nil
return c.ctx.DoubleType()
case types.Complex64:
return c.ctx.StructType([]llvm.Type{c.ctx.FloatType(), c.ctx.FloatType()}, false), nil
return c.ctx.StructType([]llvm.Type{c.ctx.FloatType(), c.ctx.FloatType()}, false)
case types.Complex128:
return c.ctx.StructType([]llvm.Type{c.ctx.DoubleType(), c.ctx.DoubleType()}, false), nil
return c.ctx.StructType([]llvm.Type{c.ctx.DoubleType(), c.ctx.DoubleType()}, false)
case types.String, types.UntypedString:
return c.mod.GetTypeByName("runtime._string"), nil
return c.mod.GetTypeByName("runtime._string")
case types.Uintptr:
return c.uintptrType, nil
return c.uintptrType
case types.UnsafePointer:
return c.i8ptrType, nil
return c.i8ptrType
default:
return llvm.Type{}, errors.New("todo: unknown basic type: " + typ.String())
panic("unknown basic type: " + typ.String())
}
case *types.Chan:
return llvm.PointerType(c.mod.GetTypeByName("runtime.channel"), 0), nil
return llvm.PointerType(c.mod.GetTypeByName("runtime.channel"), 0)
case *types.Interface:
return c.mod.GetTypeByName("runtime._interface"), nil
return c.mod.GetTypeByName("runtime._interface")
case *types.Map:
return llvm.PointerType(c.mod.GetTypeByName("runtime.hashmap"), 0), nil
return llvm.PointerType(c.mod.GetTypeByName("runtime.hashmap"), 0)
case *types.Named:
if _, ok := typ.Underlying().(*types.Struct); ok {
llvmType := c.mod.GetTypeByName(typ.Obj().Pkg().Path() + "." + typ.Obj().Name())
if llvmType.IsNil() {
return llvm.Type{}, errors.New("type not found: " + typ.Obj().Pkg().Path() + "." + typ.Obj().Name())
panic("underlying type not found: " + typ.Obj().Pkg().Path() + "." + typ.Obj().Name())
}
return llvmType, nil
return llvmType
}
return c.getLLVMType(typ.Underlying())
case *types.Pointer:
ptrTo, err := c.getLLVMType(typ.Elem())
if err != nil {
return llvm.Type{}, err
}
return llvm.PointerType(ptrTo, 0), nil
ptrTo := c.getLLVMType(typ.Elem())
return llvm.PointerType(ptrTo, 0)
case *types.Signature: // function value
return c.getFuncType(typ)
case *types.Slice:
elemType, err := c.getLLVMType(typ.Elem())
if err != nil {
return llvm.Type{}, err
}
elemType := c.getLLVMType(typ.Elem())
members := []llvm.Type{
llvm.PointerType(elemType, 0),
c.uintptrType, // len
c.uintptrType, // cap
}
return c.ctx.StructType(members, false), nil
return c.ctx.StructType(members, false)
case *types.Struct:
members := make([]llvm.Type, typ.NumFields())
for i := 0; i < typ.NumFields(); i++ {
member, err := c.getLLVMType(typ.Field(i).Type())
if err != nil {
return llvm.Type{}, err
}
members[i] = member
members[i] = c.getLLVMType(typ.Field(i).Type())
}
if len(members) > 2 && typ.Field(0).Name() == "C union" {
// Not a normal struct but a C union emitted by cgo.
@ -520,19 +491,15 @@ func (c *Compiler) getLLVMType(goType types.Type) (llvm.Type, error) {
members = append(members, llvm.ArrayType(c.ctx.Int8Type(), int(maxSize-mainTypeSize)))
}
}
return c.ctx.StructType(members, false), nil
return c.ctx.StructType(members, false)
case *types.Tuple:
members := make([]llvm.Type, typ.Len())
for i := 0; i < typ.Len(); i++ {
member, err := c.getLLVMType(typ.At(i).Type())
if err != nil {
return llvm.Type{}, err
}
members[i] = member
members[i] = c.getLLVMType(typ.At(i).Type())
}
return c.ctx.StructType(members, false), nil
return c.ctx.StructType(members, false)
default:
return llvm.Type{}, errors.New("todo: unknown type: " + goType.String())
panic("unknown type: " + goType.String())
}
}
@ -584,15 +551,12 @@ func isPointer(typ types.Type) bool {
}
// Get the DWARF type for this Go type.
func (c *Compiler) getDIType(typ types.Type) (llvm.Metadata, error) {
func (c *Compiler) getDIType(typ types.Type) llvm.Metadata {
name := typ.String()
if dityp, ok := c.ditypes[name]; ok {
return dityp, nil
return dityp
} else {
llvmType, err := c.getLLVMType(typ)
if err != nil {
return llvm.Metadata{}, err
}
llvmType := c.getLLVMType(typ)
sizeInBytes := c.targetData.TypeAllocSize(llvmType)
var encoding llvm.DwarfTypeEncoding
switch typ := typ.(type) {
@ -620,11 +584,11 @@ func (c *Compiler) getDIType(typ types.Type) (llvm.Metadata, error) {
Encoding: encoding,
})
c.ditypes[name] = dityp
return dityp, nil
return dityp
}
}
func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
func (c *Compiler) parseFuncDecl(f *ir.Function) *Frame {
frame := &Frame{
fn: f,
locals: make(map[ssa.Value]llvm.Value),
@ -636,29 +600,18 @@ func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
if f.Signature.Results() == nil {
retType = c.ctx.VoidType()
} else if f.Signature.Results().Len() == 1 {
var err error
retType, err = c.getLLVMType(f.Signature.Results().At(0).Type())
if err != nil {
return nil, err
}
retType = c.getLLVMType(f.Signature.Results().At(0).Type())
} else {
results := make([]llvm.Type, 0, f.Signature.Results().Len())
for i := 0; i < f.Signature.Results().Len(); i++ {
typ, err := c.getLLVMType(f.Signature.Results().At(i).Type())
if err != nil {
return nil, err
}
results = append(results, typ)
results = append(results, c.getLLVMType(f.Signature.Results().At(i).Type()))
}
retType = c.ctx.StructType(results, false)
}
var paramTypes []llvm.Type
for _, param := range f.Params {
paramType, err := c.getLLVMType(param.Type())
if err != nil {
return nil, err
}
paramType := c.getLLVMType(param.Type())
paramTypeFragments := c.expandFormalParamType(paramType)
paramTypes = append(paramTypes, paramTypeFragments...)
}
@ -678,15 +631,15 @@ func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
frame.fn.LLVMFn = llvm.AddFunction(c.mod, name, fnType)
}
return frame, nil
return frame
}
func (c *Compiler) attachDebugInfo(f *ir.Function) (llvm.Metadata, error) {
func (c *Compiler) attachDebugInfo(f *ir.Function) llvm.Metadata {
pos := c.ir.Program.Fset.Position(f.Syntax().Pos())
return c.attachDebugInfoRaw(f, f.LLVMFn, "", pos.Filename, pos.Line)
}
func (c *Compiler) attachDebugInfoRaw(f *ir.Function, llvmFn llvm.Value, suffix, filename string, line int) (llvm.Metadata, error) {
func (c *Compiler) attachDebugInfoRaw(f *ir.Function, llvmFn llvm.Value, suffix, filename string, line int) llvm.Metadata {
if _, ok := c.difiles[filename]; !ok {
dir, file := filepath.Split(filename)
if dir != "" {
@ -698,11 +651,7 @@ func (c *Compiler) attachDebugInfoRaw(f *ir.Function, llvmFn llvm.Value, suffix,
// Debug info for this function.
diparams := make([]llvm.Metadata, 0, len(f.Params))
for _, param := range f.Params {
ditype, err := c.getDIType(param.Type())
if err != nil {
return llvm.Metadata{}, err
}
diparams = append(diparams, ditype)
diparams = append(diparams, c.getDIType(param.Type()))
}
diFuncType := c.dibuilder.CreateSubroutineType(llvm.DISubroutineType{
File: c.difiles[filename],
@ -722,7 +671,7 @@ func (c *Compiler) attachDebugInfoRaw(f *ir.Function, llvmFn llvm.Value, suffix,
Optimized: true,
})
llvmFn.SetSubprogram(difunc)
return difunc, nil
return difunc
}
func (c *Compiler) parseFunc(frame *Frame) error {
@ -742,18 +691,10 @@ func (c *Compiler) parseFunc(frame *Frame) error {
if frame.fn.Synthetic == "package initializer" {
// Package initializers have no debug info. Create some fake debug
// info to at least have *something*.
difunc, err := c.attachDebugInfoRaw(frame.fn, frame.fn.LLVMFn, "", "", 0)
if err != nil {
return err
}
frame.difunc = difunc
frame.difunc = c.attachDebugInfoRaw(frame.fn, frame.fn.LLVMFn, "", "", 0)
} else if frame.fn.Syntax() != nil {
// Create debug info file if needed.
difunc, err := c.attachDebugInfo(frame.fn)
if err != nil {
return err
}
frame.difunc = difunc
frame.difunc = c.attachDebugInfo(frame.fn)
}
pos := c.ir.Program.Fset.Position(frame.fn.Pos())
c.builder.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), frame.difunc, llvm.Metadata{})
@ -771,10 +712,7 @@ func (c *Compiler) parseFunc(frame *Frame) error {
// Load function parameters
llvmParamIndex := 0
for i, param := range frame.fn.Params {
llvmType, err := c.getLLVMType(param.Type())
if err != nil {
return err
}
llvmType := c.getLLVMType(param.Type())
fields := make([]llvm.Value, 0, 1)
for range c.expandFormalParamType(llvmType) {
fields = append(fields, frame.fn.LLVMFn.Param(llvmParamIndex))
@ -785,15 +723,11 @@ func (c *Compiler) parseFunc(frame *Frame) error {
// Add debug information to this parameter (if available)
if c.Debug && frame.fn.Syntax() != nil {
pos := c.ir.Program.Fset.Position(frame.fn.Syntax().Pos())
dityp, err := c.getDIType(param.Type())
if err != nil {
return err
}
c.dibuilder.CreateParameterVariable(frame.difunc, llvm.DIParameterVariable{
Name: param.Name(),
File: c.difiles[pos.Filename],
Line: pos.Line,
Type: dityp,
Type: c.getDIType(param.Type()),
AlwaysPreserve: true,
ArgNo: i + 1,
})
@ -814,11 +748,7 @@ func (c *Compiler) parseFunc(frame *Frame) error {
// Determine the context type. It's a struct containing all variables.
freeVarTypes := make([]llvm.Type, 0, len(frame.fn.FreeVars))
for _, freeVar := range frame.fn.FreeVars {
typ, err := c.getLLVMType(freeVar.Type())
if err != nil {
return err
}
freeVarTypes = append(freeVarTypes, typ)
freeVarTypes = append(freeVarTypes, c.getLLVMType(freeVar.Type()))
}
contextType := c.ctx.StructType(freeVarTypes, false)
@ -1346,10 +1276,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
switch expr := expr.(type) {
case *ssa.Alloc:
typ, err := c.getLLVMType(expr.Type().Underlying().(*types.Pointer).Elem())
if err != nil {
return llvm.Value{}, err
}
typ := c.getLLVMType(expr.Type().Underlying().(*types.Pointer).Elem())
var buf llvm.Value
if expr.Heap {
size := c.targetData.TypeAllocSize(typ)
@ -1400,10 +1327,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
if err != nil {
return llvm.Value{}, err
}
llvmType, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
llvmType := c.getLLVMType(expr.Type())
if x.Type() == llvmType {
// Different Go type but same LLVM type (for example, named int).
// This is the common case.
@ -1452,10 +1376,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
// Extract a field from a CGo union.
// This could be done directly, but as this is a very infrequent
// operation it's much easier to bitcast it through an alloca.
resultType, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
resultType := c.getLLVMType(expr.Type())
alloca := c.builder.CreateAlloca(value.Type(), "")
c.builder.CreateStore(value, alloca)
bitcast := c.builder.CreateBitCast(alloca, llvm.PointerType(resultType, 0), "")
@ -1477,10 +1398,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
// This is not a regular struct but actually an union.
// That simplifies things, as we can just bitcast the pointer to the
// right type.
ptrType, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, nil
}
ptrType := c.getLLVMType(expr.Type())
return c.builder.CreateBitCast(val, ptrType, ""), nil
} else {
// Do a GEP on the pointer to get the field address.
@ -1495,7 +1413,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
if fn.IsExported() {
return llvm.Value{}, c.makeError(expr.Pos(), "cannot use an exported function as value")
}
return c.createFuncValue(fn.LLVMFn, llvm.Undef(c.i8ptrType), fn.Signature)
return c.createFuncValue(fn.LLVMFn, llvm.Undef(c.i8ptrType), fn.Signature), nil
case *ssa.Global:
value := c.ir.GetGlobal(expr).LLVMGlobal
if value.IsNil() {
@ -1620,14 +1538,8 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
return c.parseMakeInterface(val, expr.X.Type(), expr.Pos())
case *ssa.MakeMap:
mapType := expr.Type().Underlying().(*types.Map)
llvmKeyType, err := c.getLLVMType(mapType.Key().Underlying())
if err != nil {
return llvm.Value{}, err
}
llvmValueType, err := c.getLLVMType(mapType.Elem().Underlying())
if err != nil {
return llvm.Value{}, err
}
llvmKeyType := c.getLLVMType(mapType.Key().Underlying())
llvmValueType := c.getLLVMType(mapType.Elem().Underlying())
keySize := c.targetData.TypeAllocSize(llvmKeyType)
valueSize := c.targetData.TypeAllocSize(llvmValueType)
llvmKeySize := llvm.ConstInt(c.ctx.Int8Type(), keySize, false)
@ -1644,10 +1556,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
return llvm.Value{}, nil
}
sliceType := expr.Type().Underlying().(*types.Slice)
llvmElemType, err := c.getLLVMType(sliceType.Elem())
if err != nil {
return llvm.Value{}, nil
}
llvmElemType := c.getLLVMType(sliceType.Elem())
elemSize := c.targetData.TypeAllocSize(llvmElemType)
elemSizeValue := llvm.ConstInt(c.uintptrType, elemSize, false)
@ -1707,14 +1616,8 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
if expr.IsString {
return c.createRuntimeCall("stringNext", []llvm.Value{llvmRangeVal, it}, "range.next"), nil
} else { // map
llvmKeyType, err := c.getLLVMType(rangeVal.Type().Underlying().(*types.Map).Key())
if err != nil {
return llvm.Value{}, err
}
llvmValueType, err := c.getLLVMType(rangeVal.Type().Underlying().(*types.Map).Elem())
if err != nil {
return llvm.Value{}, err
}
llvmKeyType := c.getLLVMType(rangeVal.Type().Underlying().(*types.Map).Key())
llvmValueType := c.getLLVMType(rangeVal.Type().Underlying().(*types.Map).Elem())
mapKeyAlloca := c.builder.CreateAlloca(llvmKeyType, "range.key")
mapKeyPtr := c.builder.CreateBitCast(mapKeyAlloca, c.i8ptrType, "range.keyptr")
@ -1729,11 +1632,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
return tuple, nil
}
case *ssa.Phi:
t, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
phi := c.builder.CreatePHI(t, "")
phi := c.builder.CreatePHI(c.getLLVMType(expr.Type()), "")
frame.phis = append(frame.phis, Phi{expr, phi})
return phi, nil
case *ssa.Range:
@ -1752,10 +1651,7 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
case *ssa.Select:
if len(expr.States) == 0 {
// Shortcuts for some simple selects.
llvmType, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
llvmType := c.getLLVMType(expr.Type())
if expr.Blocking {
// Blocks forever:
// select {}
@ -2225,10 +2121,7 @@ func (c *Compiler) parseBinOp(op token.Token, typ types.Type, x, y llvm.Value, p
func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error) {
switch typ := expr.Type().Underlying().(type) {
case *types.Basic:
llvmType, err := c.getLLVMType(typ)
if err != nil {
return llvm.Value{}, err
}
llvmType := c.getLLVMType(typ)
if typ.Info()&types.IsBoolean != 0 {
b := constant.BoolVal(expr.Value)
n := uint64(0)
@ -2294,20 +2187,12 @@ func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error
return llvm.Value{}, errors.New("todo: unknown constant: " + expr.String())
}
case *types.Chan:
sig, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
return c.getZeroValue(sig), nil
return c.getZeroValue(c.getLLVMType(expr.Type())), nil
case *types.Signature:
if expr.Value != nil {
return llvm.Value{}, errors.New("non-nil signature constant")
}
sig, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
return c.getZeroValue(sig), nil
return c.getZeroValue(c.getLLVMType(expr.Type())), nil
case *types.Interface:
if expr.Value != nil {
return llvm.Value{}, errors.New("non-nil interface constant")
@ -2323,19 +2208,12 @@ func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error
if expr.Value != nil {
return llvm.Value{}, errors.New("non-nil pointer constant")
}
llvmType, err := c.getLLVMType(typ)
if err != nil {
return llvm.Value{}, err
}
return llvm.ConstPointerNull(llvmType), nil
return llvm.ConstPointerNull(c.getLLVMType(typ)), nil
case *types.Slice:
if expr.Value != nil {
return llvm.Value{}, errors.New("non-nil slice constant")
}
elemType, err := c.getLLVMType(typ.Elem())
if err != nil {
return llvm.Value{}, err
}
elemType := c.getLLVMType(typ.Elem())
llvmPtr := llvm.ConstPointerNull(llvm.PointerType(elemType, 0))
llvmLen := llvm.ConstInt(c.uintptrType, 0, false)
slice := c.ctx.ConstStruct([]llvm.Value{
@ -2349,10 +2227,7 @@ func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error
// I believe this is not allowed by the Go spec.
panic("non-nil map constant")
}
llvmType, err := c.getLLVMType(typ)
if err != nil {
return llvm.Value{}, err
}
llvmType := c.getLLVMType(typ)
return c.getZeroValue(llvmType), nil
default:
return llvm.Value{}, errors.New("todo: unknown constant: " + expr.String())
@ -2361,10 +2236,7 @@ func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error
func (c *Compiler) parseConvert(typeFrom, typeTo types.Type, value llvm.Value, pos token.Pos) (llvm.Value, error) {
llvmTypeFrom := value.Type()
llvmTypeTo, err := c.getLLVMType(typeTo)
if err != nil {
return llvm.Value{}, err
}
llvmTypeTo := c.getLLVMType(typeTo)
// Conversion between unsafe.Pointer and uintptr.
isPtrFrom := isPointer(typeFrom.Underlying())

18
compiler/defer.go
Просмотреть файл

@ -217,11 +217,7 @@ func (c *Compiler) emitRunDefers(frame *Frame) error {
// Get the real defer struct type and cast to it.
valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0), c.i8ptrType}
for _, arg := range callback.Args {
llvmType, err := c.getLLVMType(arg.Type())
if err != nil {
return err
}
valueTypes = append(valueTypes, llvmType)
valueTypes = append(valueTypes, c.getLLVMType(arg.Type()))
}
deferFrameType := c.ctx.StructType(valueTypes, false)
deferFramePtr := c.builder.CreateBitCast(deferData, llvm.PointerType(deferFrameType, 0), "deferFrame")
@ -255,11 +251,7 @@ func (c *Compiler) emitRunDefers(frame *Frame) error {
// Get the real defer struct type and cast to it.
valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)}
for _, param := range callback.Params {
llvmType, err := c.getLLVMType(param.Type())
if err != nil {
return err
}
valueTypes = append(valueTypes, llvmType)
valueTypes = append(valueTypes, c.getLLVMType(param.Type()))
}
deferFrameType := c.ctx.StructType(valueTypes, false)
deferFramePtr := c.builder.CreateBitCast(deferData, llvm.PointerType(deferFrameType, 0), "deferFrame")
@ -289,11 +281,7 @@ func (c *Compiler) emitRunDefers(frame *Frame) error {
valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)}
params := fn.Signature.Params()
for i := 0; i < params.Len(); i++ {
llvmType, err := c.getLLVMType(params.At(i).Type())
if err != nil {
return err
}
valueTypes = append(valueTypes, llvmType)
valueTypes = append(valueTypes, c.getLLVMType(params.At(i).Type()))
}
valueTypes = append(valueTypes, c.i8ptrType) // closure
deferFrameType := c.ctx.StructType(valueTypes, false)

53
compiler/func.go
Просмотреть файл

@ -41,7 +41,7 @@ func (c *Compiler) funcImplementation() funcValueImplementation {
// createFuncValue creates a function value from a raw function pointer with no
// context.
func (c *Compiler) createFuncValue(funcPtr, context llvm.Value, sig *types.Signature) (llvm.Value, error) {
func (c *Compiler) createFuncValue(funcPtr, context llvm.Value, sig *types.Signature) llvm.Value {
var funcValueScalar llvm.Value
switch c.funcImplementation() {
case funcValueDoubleword:
@ -66,14 +66,11 @@ func (c *Compiler) createFuncValue(funcPtr, context llvm.Value, sig *types.Signa
default:
panic("unimplemented func value variant")
}
funcValueType, err := c.getFuncType(sig)
if err != nil {
return llvm.Value{}, err
}
funcValueType := c.getFuncType(sig)
funcValue := llvm.Undef(funcValueType)
funcValue = c.builder.CreateInsertValue(funcValue, context, 0, "")
funcValue = c.builder.CreateInsertValue(funcValue, funcValueScalar, 1, "")
return funcValue, nil
return funcValue
}
// getFuncSignature returns a global for identification of a particular function
@ -112,10 +109,7 @@ func (c *Compiler) decodeFuncValue(funcValue llvm.Value, sig *types.Signature) (
case funcValueDoubleword:
funcPtr = c.builder.CreateExtractValue(funcValue, 1, "")
case funcValueSwitch:
llvmSig, err := c.getRawFuncType(sig)
if err != nil {
return llvm.Value{}, llvm.Value{}, err
}
llvmSig := c.getRawFuncType(sig)
sigGlobal := c.getFuncSignature(sig)
funcPtr = c.createRuntimeCall("getFuncPtr", []llvm.Value{funcValue, sigGlobal}, "")
funcPtr = c.builder.CreateIntToPtr(funcPtr, llvmSig, "")
@ -126,25 +120,21 @@ func (c *Compiler) decodeFuncValue(funcValue llvm.Value, sig *types.Signature) (
}
// getFuncType returns the type of a func value given a signature.
func (c *Compiler) getFuncType(typ *types.Signature) (llvm.Type, error) {
func (c *Compiler) getFuncType(typ *types.Signature) llvm.Type {
switch c.funcImplementation() {
case funcValueDoubleword:
rawPtr, err := c.getRawFuncType(typ)
if err != nil {
return llvm.Type{}, err
}
return c.ctx.StructType([]llvm.Type{c.i8ptrType, rawPtr}, false), nil
rawPtr := c.getRawFuncType(typ)
return c.ctx.StructType([]llvm.Type{c.i8ptrType, rawPtr}, false)
case funcValueSwitch:
return c.mod.GetTypeByName("runtime.funcValue"), nil
return c.mod.GetTypeByName("runtime.funcValue")
default:
panic("unimplemented func value variant")
}
}
// getRawFuncType returns a LLVM function pointer type for a given signature.
func (c *Compiler) getRawFuncType(typ *types.Signature) (llvm.Type, error) {
func (c *Compiler) getRawFuncType(typ *types.Signature) llvm.Type {
// Get the return type.
var err error
var returnType llvm.Type
switch typ.Results().Len() {
case 0:
@ -152,21 +142,14 @@ func (c *Compiler) getRawFuncType(typ *types.Signature) (llvm.Type, error) {
returnType = c.ctx.VoidType()
case 1:
// Just one return value.
returnType, err = c.getLLVMType(typ.Results().At(0).Type())
if err != nil {
return llvm.Type{}, err
}
returnType = c.getLLVMType(typ.Results().At(0).Type())
default:
// Multiple return values. Put them together in a struct.
// This appears to be the common way to handle multiple return values in
// LLVM.
members := make([]llvm.Type, typ.Results().Len())
for i := 0; i < typ.Results().Len(); i++ {
returnType, err := c.getLLVMType(typ.Results().At(i).Type())
if err != nil {
return llvm.Type{}, err
}
members[i] = returnType
members[i] = c.getLLVMType(typ.Results().At(i).Type())
}
returnType = c.ctx.StructType(members, false)
}
@ -174,10 +157,7 @@ func (c *Compiler) getRawFuncType(typ *types.Signature) (llvm.Type, error) {
// Get the parameter types.
var paramTypes []llvm.Type
if typ.Recv() != nil {
recv, err := c.getLLVMType(typ.Recv().Type())
if err != nil {
return llvm.Type{}, err
}
recv := c.getLLVMType(typ.Recv().Type())
if recv.StructName() == "runtime._interface" {
// This is a call on an interface, not a concrete type.
// The receiver is not an interface, but a i8* type.
@ -186,10 +166,7 @@ func (c *Compiler) getRawFuncType(typ *types.Signature) (llvm.Type, error) {
paramTypes = append(paramTypes, c.expandFormalParamType(recv)...)
}
for i := 0; i < typ.Params().Len(); i++ {
subType, err := c.getLLVMType(typ.Params().At(i).Type())
if err != nil {
return llvm.Type{}, err
}
subType := c.getLLVMType(typ.Params().At(i).Type())
paramTypes = append(paramTypes, c.expandFormalParamType(subType)...)
}
// All functions take these parameters at the end.
@ -197,7 +174,7 @@ func (c *Compiler) getRawFuncType(typ *types.Signature) (llvm.Type, error) {
paramTypes = append(paramTypes, c.i8ptrType) // parent coroutine
// Make a func type out of the signature.
return llvm.PointerType(llvm.FunctionType(returnType, paramTypes, false), c.funcPtrAddrSpace), nil
return llvm.PointerType(llvm.FunctionType(returnType, paramTypes, false), c.funcPtrAddrSpace)
}
// parseMakeClosure makes a function value (with context) from the given
@ -261,5 +238,5 @@ func (c *Compiler) parseMakeClosure(frame *Frame, expr *ssa.MakeClosure) (llvm.V
}
// Create the closure.
return c.createFuncValue(f.LLVMFn, context, f.Signature)
return c.createFuncValue(f.LLVMFn, context, f.Signature), nil
}

24
compiler/interface.go
Просмотреть файл

@ -279,10 +279,7 @@ func (c *Compiler) parseTypeAssert(frame *Frame, expr *ssa.TypeAssert) (llvm.Val
if err != nil {
return llvm.Value{}, err
}
assertedType, err := c.getLLVMType(expr.AssertedType)
if err != nil {
return llvm.Value{}, err
}
assertedType := c.getLLVMType(expr.AssertedType)
actualTypeNum := c.builder.CreateExtractValue(itf, 0, "interface.type")
commaOk := llvm.Value{}
@ -389,10 +386,7 @@ func (c *Compiler) getInvokeCall(frame *Frame, instr *ssa.CallCommon) (llvm.Valu
return llvm.Value{}, nil, err
}
llvmFnType, err := c.getRawFuncType(instr.Method.Type().(*types.Signature))
if err != nil {
return llvm.Value{}, nil, err
}
llvmFnType := c.getRawFuncType(instr.Method.Type().(*types.Signature))
typecode := c.builder.CreateExtractValue(itf, 0, "invoke.typecode")
values := []llvm.Value{
@ -443,10 +437,7 @@ func (c *Compiler) getInterfaceInvokeWrapper(f *ir.Function) (llvm.Value, error)
}
// Get the expanded receiver type.
receiverType, err := c.getLLVMType(f.Params[0].Type())
if err != nil {
return llvm.Value{}, err
}
receiverType := c.getLLVMType(f.Params[0].Type())
expandedReceiverType := c.expandFormalParamType(receiverType)
// Does this method even need any wrapping?
@ -473,7 +464,7 @@ func (c *Compiler) getInterfaceInvokeWrapper(f *ir.Function) (llvm.Value, error)
// createInterfaceInvokeWrapper finishes the work of getInterfaceInvokeWrapper,
// see that function for details.
func (c *Compiler) createInterfaceInvokeWrapper(state interfaceInvokeWrapper) error {
func (c *Compiler) createInterfaceInvokeWrapper(state interfaceInvokeWrapper) {
wrapper := state.wrapper
fn := state.fn
receiverType := state.receiverType
@ -483,10 +474,7 @@ func (c *Compiler) createInterfaceInvokeWrapper(state interfaceInvokeWrapper) er
// add debug info if needed
if c.Debug {
pos := c.ir.Program.Fset.Position(fn.Pos())
difunc, err := c.attachDebugInfoRaw(fn, wrapper, "$invoke", pos.Filename, pos.Line)
if err != nil {
return err
}
difunc := c.attachDebugInfoRaw(fn, wrapper, "$invoke", pos.Filename, pos.Line)
c.builder.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), difunc, llvm.Metadata{})
}
@ -524,6 +512,4 @@ func (c *Compiler) createInterfaceInvokeWrapper(state interfaceInvokeWrapper) er
ret := c.builder.CreateCall(fn.LLVMFn, params, "ret")
c.builder.CreateRet(ret)
}
return nil
}

5
compiler/map.go
Просмотреть файл

@ -10,10 +10,7 @@ import (
)
func (c *Compiler) emitMapLookup(keyType, valueType types.Type, m, key llvm.Value, commaOk bool, pos token.Pos) (llvm.Value, error) {
llvmValueType, err := c.getLLVMType(valueType)
if err != nil {
return llvm.Value{}, err
}
llvmValueType := c.getLLVMType(valueType)
mapValueAlloca := c.builder.CreateAlloca(llvmValueType, "hashmap.value")
mapValuePtr := c.builder.CreateBitCast(mapValueAlloca, c.i8ptrType, "hashmap.valueptr")
var commaOkValue llvm.Value