102 lines
2.7 KiB
Go
102 lines
2.7 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 gossa
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import (
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"go/constant"
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"go/types"
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"io"
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"os"
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"runtime"
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"golang.org/x/tools/go/types/typeutil"
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llvm "tinygo.org/x/go-llvm"
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)
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// A Program is a partial or complete Go program converted to SSA form.
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type Program struct {
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ctx llvm.Context
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typs typeutil.Map
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td llvm.TargetData
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intType 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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}
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func NewProgram(targetRep string) *Program {
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ctx := llvm.NewContext()
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runtime.SetFinalizer(ctx.C, (llvm.Context).Dispose)
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td := llvm.NewTargetData(targetRep)
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return &Program{ctx: ctx, td: td}
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}
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func (p *Program) NewPackage(pkg *types.Package) *Package {
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name := pkg.Path()
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mod := p.ctx.NewModule(name)
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runtime.SetFinalizer(mod.C, (llvm.Module).Dispose)
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return &Package{mod, pkg, p}
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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 Package struct {
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mod llvm.Module
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pkg *types.Package
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prog *Program
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}
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func (p *Package) NewConst(name string, val constant.Value) *NamedConst {
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return &NamedConst{}
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}
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func (p *Package) NewType(name string, typ types.Type) *Type {
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return &Type{}
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}
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func (p *Package) NewVar(name string, typ types.Type) *Global {
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gbl := llvm.AddGlobal(p.mod, p.prog.llvmType(typ), name)
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return &Global{gbl}
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}
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func (p *Package) NewFunc(name string, sig *types.Signature) *Function {
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return &Function{}
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}
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func (p *Package) WriteTo(w io.Writer) (int64, error) {
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buf := llvm.WriteBitcodeToMemoryBuffer(p.mod)
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n, err := w.Write(buf.Bytes()) // TODO(xsw): reduce copy of bytes
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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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