llgen

chore/llgen/llgen.go

@@ -0,0 +1,79 @@
+/*
+ * 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 main
+
+import (
+	"fmt"
+	"go/ast"
+	"go/importer"
+	"go/parser"
+	"go/token"
+	"go/types"
+	"os"
+	"path/filepath"
+
+	"github.com/goplus/llgo/cl"
+	"golang.org/x/tools/go/ssa"
+	"golang.org/x/tools/go/ssa/ssautil"
+
+	llssa "github.com/goplus/llgo/ssa"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Fprintln(os.Stderr, "Usage: llgen xxx.go")
+		return
+	}
+
+	inFile := os.Args[1]
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, inFile, nil, parser.ParseComments)
+	check(err)
+
+	files := []*ast.File{f}
+	name := f.Name.Name
+	pkg := types.NewPackage(name, name)
+	foo, _, err := ssautil.BuildPackage(
+		&types.Config{Importer: importer.Default()}, fset, pkg, files, ssa.SanityCheckFunctions)
+	check(err)
+
+	foo.WriteTo(os.Stderr)
+	for _, m := range foo.Members {
+		if f, ok := m.(*ssa.Function); ok {
+			f.WriteTo(os.Stderr)
+		}
+	}
+
+	llssa.Initialize(llssa.InitAll)
+	llssa.SetDebug(llssa.DbgFlagAll)
+	cl.SetDebug(cl.DbgFlagAll)
+
+	prog := llssa.NewProgram(nil)
+	ret, err := cl.NewPackage(prog, foo, nil)
+	check(err)
+
+	dir, _ := filepath.Split(inFile)
+	outFile := dir + "out.ll"
+	err = os.WriteFile(outFile, []byte(ret.String()), 0644)
+	check(err)
+}
+
+func check(err error) {
+	if err != nil {
+		panic(err)
+	}
+}