141 lines
3.5 KiB
Go
141 lines
3.5 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 build
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import (
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"fmt"
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"go/token"
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"log"
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"os"
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"strings"
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"golang.org/x/tools/go/packages"
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"golang.org/x/tools/go/ssa"
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"github.com/goplus/llgo/cl"
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llssa "github.com/goplus/llgo/ssa"
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"github.com/goplus/llgo/x/clang"
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)
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type Mode int
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const (
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ModeBuild Mode = iota
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ModeInstall
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)
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// -----------------------------------------------------------------------------
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const (
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loadFiles = packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles
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loadImports = loadFiles | packages.NeedImports
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loadTypes = loadImports | packages.NeedTypes | packages.NeedTypesSizes
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loadSyntax = loadTypes | packages.NeedSyntax | packages.NeedTypesInfo
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)
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func Do(args []string, mode Mode) {
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flags, patterns := parseArgs(args)
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cfg := &packages.Config{
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Mode: loadSyntax | packages.NeedExportFile,
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BuildFlags: flags,
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}
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if patterns == nil {
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patterns = []string{"."}
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}
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initial, err := packages.Load(cfg, patterns...)
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check(err)
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// Create SSA-form program representation.
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_, pkgs, errPkgs := allPkgs(initial, ssa.SanityCheckFunctions)
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for _, errPkg := range errPkgs {
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log.Println("cannot build SSA for package", errPkg)
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}
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llssa.Initialize(llssa.InitAll)
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// llssa.SetDebug(llssa.DbgFlagAll)
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// cl.SetDebug(cl.DbgFlagAll)
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prog := llssa.NewProgram(nil)
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llFiles := make([]string, 0, len(pkgs))
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for _, pkg := range pkgs {
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pkg.SSA.Build()
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llFiles = buildPkg(llFiles, prog, pkg, mode)
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}
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if mode == ModeInstall {
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fmt.Fprintln(os.Stderr, "clang", llFiles)
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err = clang.New("").Exec(llFiles...)
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check(err)
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}
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}
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func buildPkg(llFiles []string, prog llssa.Program, pkg aPackage, mode Mode) []string {
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pkgPath := pkg.PkgPath
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fmt.Fprintln(os.Stderr, pkgPath)
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if pkgPath == "unsafe" { // TODO(xsw): remove this special case
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return llFiles
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}
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ret, err := cl.NewPackage(prog, pkg.SSA, pkg.Syntax)
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check(err)
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if mode == ModeInstall {
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file := pkg.ExportFile + ".ll"
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os.WriteFile(file, []byte(ret.String()), 0644)
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llFiles = append(llFiles, file)
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}
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return llFiles
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}
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type aPackage struct {
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*packages.Package
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SSA *ssa.Package
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}
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func allPkgs(initial []*packages.Package, mode ssa.BuilderMode) (prog *ssa.Program, all []aPackage, errs []*packages.Package) {
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var fset *token.FileSet
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if len(initial) > 0 {
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fset = initial[0].Fset
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}
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prog = ssa.NewProgram(fset, mode)
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packages.Visit(initial, nil, func(p *packages.Package) {
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if p.Types != nil && !p.IllTyped {
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ssaPkg := prog.CreatePackage(p.Types, p.Syntax, p.TypesInfo, true)
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all = append(all, aPackage{p, ssaPkg})
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} else {
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errs = append(errs, p)
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}
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})
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return
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}
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func parseArgs(args []string) (flags, patterns []string) {
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for i, arg := range args {
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if !strings.HasPrefix(arg, "-") {
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return args[:i], args[i:]
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}
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}
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return args, nil
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}
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func check(err error) {
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if err != nil {
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panic(err)
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}
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}
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// -----------------------------------------------------------------------------
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