378 lines
8.4 KiB
Go
378 lines
8.4 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ssa
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import (
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"go/constant"
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"go/types"
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"github.com/goplus/llvm"
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"golang.org/x/tools/go/types/typeutil"
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)
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const (
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PkgRuntime = "github.com/goplus/llgo/internal/runtime"
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)
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// -----------------------------------------------------------------------------
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type dbgFlags = int
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const (
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DbgFlagInstruction dbgFlags = 1 << iota
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DbgFlagAll = DbgFlagInstruction
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)
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var (
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debugInstr bool
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)
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// SetDebug sets debug flags.
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func SetDebug(dbgFlags dbgFlags) {
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debugInstr = (dbgFlags & DbgFlagInstruction) != 0
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}
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// -----------------------------------------------------------------------------
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// InitFlags is a set of flags for initializing the LLVM library.
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type InitFlags int
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const (
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InitNativeTarget InitFlags = 1 << iota
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InitAllTargets
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InitAllTargetInfos
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InitAllTargetMCs
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InitNativeAsmPrinter
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InitAllAsmPrinters
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InitAllAsmParsers
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InitNative = InitNativeTarget | InitNativeAsmPrinter
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InitAll = InitAllTargets | InitAllAsmParsers | InitAllAsmPrinters | InitAllTargetInfos | InitAllTargetMCs
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)
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// Initialize initializes the LLVM library.
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func Initialize(flags InitFlags) {
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if flags&InitAllTargetInfos != 0 {
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llvm.InitializeAllTargetInfos()
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}
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if flags&InitAllTargets != 0 {
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llvm.InitializeAllTargets()
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}
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if flags&InitAllTargetMCs != 0 {
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llvm.InitializeAllTargetMCs()
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}
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if flags&InitAllAsmParsers != 0 {
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llvm.InitializeAllAsmParsers()
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}
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if flags&InitAllAsmPrinters != 0 {
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llvm.InitializeAllAsmPrinters()
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}
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if flags&InitNativeTarget != 0 {
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llvm.InitializeNativeTarget()
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}
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if flags&InitNativeAsmPrinter != 0 {
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llvm.InitializeNativeAsmPrinter()
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}
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}
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// -----------------------------------------------------------------------------
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type aProgram struct {
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ctx llvm.Context
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typs typeutil.Map
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rt *types.Package
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rtget func() *types.Package
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target *Target
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td llvm.TargetData
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// tm llvm.TargetMachine
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intType llvm.Type
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int1Type llvm.Type
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int8Type llvm.Type
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int16Type llvm.Type
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int32Type llvm.Type
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int64Type llvm.Type
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voidType llvm.Type
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voidPtrTy llvm.Type
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rtStringTy llvm.Type
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rtIfaceTy llvm.Type
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rtSliceTy llvm.Type
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anyTy Type
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voidTy Type
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boolTy Type
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cstrTy Type
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stringTy Type
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uintptrTy Type
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intTy Type
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f64Ty Type
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}
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// A Program presents a program.
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type Program = *aProgram
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// NewProgram creates a new program.
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func NewProgram(target *Target) Program {
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if target == nil {
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target = &Target{}
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}
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ctx := llvm.NewContext()
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// TODO(xsw): Finalize may cause panic, so comment it.
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// ctx.Finalize()
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td := llvm.NewTargetData("") // TODO(xsw): target config
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return &aProgram{ctx: ctx, target: target, td: td}
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}
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// SetRuntime sets the runtime.
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// Its type can be *types.Package or func() *types.Package.
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func (p Program) SetRuntime(runtime any) {
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switch v := runtime.(type) {
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case *types.Package:
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p.rt = v
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case func() *types.Package:
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p.rtget = v
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}
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}
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func (p Program) runtime() *types.Package {
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if p.rt == nil {
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p.rt = p.rtget()
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}
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return p.rt
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}
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func (p Program) rtNamed(name string) *types.Named {
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return p.runtime().Scope().Lookup(name).Type().(*types.Named)
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}
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func (p Program) rtType(name string) Type {
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return p.Type(p.rtNamed(name))
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}
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func (p Program) rtIface() llvm.Type {
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if p.rtIfaceTy.IsNil() {
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p.rtIfaceTy = p.rtType("Interface").ll
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}
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return p.rtIfaceTy
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}
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func (p Program) rtSlice() llvm.Type {
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if p.rtSliceTy.IsNil() {
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p.rtSliceTy = p.rtType("Slice").ll
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}
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return p.rtSliceTy
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}
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func (p Program) rtString() llvm.Type {
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if p.rtStringTy.IsNil() {
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p.rtStringTy = p.rtType("String").ll
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}
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return p.rtStringTy
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}
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// NewPackage creates a new package.
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func (p Program) NewPackage(name, pkgPath string) Package {
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mod := p.ctx.NewModule(pkgPath)
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// TODO(xsw): Finalize may cause panic, so comment it.
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// mod.Finalize()
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fns := make(map[string]Function)
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gbls := make(map[string]Global)
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return &aPackage{mod, fns, gbls, p}
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}
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// Void returns void type.
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func (p Program) Void() Type {
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if p.voidTy == nil {
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p.voidTy = &aType{p.tyVoid(), types.Typ[types.Invalid], vkInvalid}
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}
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return p.voidTy
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}
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// Bool returns bool type.
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func (p Program) Bool() Type {
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if p.boolTy == nil {
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p.boolTy = p.Type(types.Typ[types.Bool])
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}
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return p.boolTy
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}
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func (p Program) CString() Type {
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if p.cstrTy == nil { // *int8
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p.cstrTy = p.Type(types.NewPointer(types.Typ[types.Int8]))
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}
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return p.cstrTy
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}
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func (p Program) String() Type {
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if p.stringTy == nil {
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p.stringTy = p.Type(types.Typ[types.String])
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}
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return p.stringTy
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}
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// Any returns any type.
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func (p Program) Any() Type {
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if p.anyTy == nil {
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p.anyTy = p.Type(tyAny)
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}
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return p.anyTy
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}
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// Int returns int type.
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func (p Program) Int() Type {
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if p.intTy == nil {
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p.intTy = p.Type(types.Typ[types.Int])
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}
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return p.intTy
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}
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// Uintptr returns uintptr type.
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func (p Program) Uintptr() Type {
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if p.uintptrTy == nil {
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p.uintptrTy = p.Type(types.Typ[types.Uintptr])
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}
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return p.uintptrTy
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}
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// Float64 returns float64 type.
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func (p Program) Float64() Type {
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if p.f64Ty == nil {
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p.f64Ty = p.Type(types.Typ[types.Float64])
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}
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return p.f64Ty
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}
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// -----------------------------------------------------------------------------
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// A Package is a single analyzed Go package containing Members for
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// all package-level functions, variables, constants and types it
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// declares. These may be accessed directly via Members, or via the
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// type-specific accessor methods Func, Type, Var and Const.
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//
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// Members also contains entries for "init" (the synthetic package
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// initializer) and "init#%d", the nth declared init function,
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// and unspecified other things too.
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type aPackage struct {
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mod llvm.Module
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fns map[string]Function
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vars map[string]Global
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prog Program
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}
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type Package = *aPackage
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// NewConst creates a new named constant.
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func (p Package) NewConst(name string, val constant.Value) NamedConst {
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return &aNamedConst{}
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}
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// NewVar creates a new global variable.
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func (p Package) NewVar(name string, typ types.Type) Global {
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t := p.prog.Type(typ)
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gbl := llvm.AddGlobal(p.mod, t.ll, name)
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ret := &aGlobal{Expr{gbl, t}}
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p.vars[name] = ret
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return ret
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}
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// VarOf returns a global variable by name.
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func (p Package) VarOf(name string) Global {
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return p.vars[name]
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}
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// NewFunc creates a new function.
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func (p Package) NewFunc(name string, sig *types.Signature) Function {
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if v, ok := p.fns[name]; ok {
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return v
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}
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t := p.prog.llvmSignature(sig)
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fn := llvm.AddFunction(p.mod, name, t.ll)
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ret := newFunction(fn, t, p, p.prog)
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p.fns[name] = ret
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return ret
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}
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// FuncOf returns a function by name.
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func (p Package) FuncOf(name string) Function {
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return p.fns[name]
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}
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func (p Package) rtAbort() Expr {
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return p.NewFunc("abort", types.NewSignatureType(nil, nil, nil, nil, nil, false)).Expr
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}
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func (p Package) rtFunc(fnName string) Expr {
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fn := p.prog.runtime().Scope().Lookup(fnName).(*types.Func)
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name := FullName(fn.Pkg(), fnName)
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return p.NewFunc(name, fn.Type().(*types.Signature)).Expr
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}
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// -----------------------------------------------------------------------------
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// String returns a string representation of the package.
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func (p Package) String() string {
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return p.mod.String()
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}
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/*
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type CodeGenFileType = llvm.CodeGenFileType
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const (
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AssemblyFile = llvm.AssemblyFile
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ObjectFile = llvm.ObjectFile
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)
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func (p *Package) CodeGen(ft CodeGenFileType) (ret []byte, err error) {
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buf, err := p.prog.targetMachine().EmitToMemoryBuffer(p.mod, ft)
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if err != nil {
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return
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}
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ret = buf.Bytes()
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buf.Dispose()
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return
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}
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func (p *Package) Bitcode() []byte {
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buf := llvm.WriteBitcodeToMemoryBuffer(p.mod)
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ret := buf.Bytes()
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buf.Dispose()
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return ret
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}
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func (p *Package) WriteTo(w io.Writer) (int64, error) {
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n, err := w.Write(p.Bitcode())
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return int64(n), err
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}
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func (p *Package) WriteFile(file string) (err error) {
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f, err := os.Create(file)
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if err != nil {
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return
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}
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defer f.Close()
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return llvm.WriteBitcodeToFile(p.mod, f)
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}
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*/
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// -----------------------------------------------------------------------------
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