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llgenf.go
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llgenf.go
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/*
* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package llgen
import (
"go/types"
"os"
"path/filepath"
"strings"
"github.com/goplus/llgo/cl"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/ssa/ssautil"
llssa "github.com/goplus/llgo/ssa"
)
const (
loadFiles = packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles
loadImports = loadFiles | packages.NeedImports
loadTypes = loadImports | packages.NeedTypes | packages.NeedTypesSizes
loadSyntax = loadTypes | packages.NeedSyntax | packages.NeedTypesInfo
)
func GenFrom(fileOrPkg string) string {
cfg := &packages.Config{
Mode: loadSyntax | packages.NeedDeps,
}
initial, err := packages.Load(cfg, fileOrPkg)
check(err)
_, pkgs := ssautil.AllPackages(initial, ssa.SanityCheckFunctions)
pkg := initial[0]
ssaPkg := pkgs[0]
ssaPkg.Build()
prog := llssa.NewProgram(nil)
prog.SetRuntime(func() *types.Package {
rt, err := packages.Load(cfg, llssa.PkgRuntime)
check(err)
return rt[0].Types
})
if Verbose {
ssaPkg.WriteTo(os.Stderr)
}
ret, err := cl.NewPackage(prog, ssaPkg, pkg.Syntax)
check(err)
return ret.String()
}
func DoFile(fileOrPkg, outFile string) {
ret := GenFrom(fileOrPkg)
err := os.WriteFile(outFile, []byte(ret), 0644)
check(err)
}
func SmartDoFile(inFile string, pkgPath ...string) {
dir, _ := filepath.Split(inFile)
fname := "llgo_autogen.ll"
if inCompilerDir(dir) {
fname = "out.ll"
}
outFile := dir + fname
if len(pkgPath) > 0 {
Do(pkgPath[0], inFile, outFile)
} else {
DoFile(inFile, outFile)
}
}
func inCompilerDir(dir string) bool {
dir, _ = filepath.Abs(dir)
return strings.Contains(filepath.ToSlash(dir), "/llgo/cl/")
}