Example #1
0
func (compiler *compiler) compile(filenames []string, importpath string) (m *Module, err error) {
	buildctx, err := llgobuild.ContextFromTriple(compiler.TargetTriple)
	if err != nil {
		return nil, err
	}
	impcfg := &loader.Config{
		Fset: token.NewFileSet(),
		TypeChecker: types.Config{
			Import: llgoimporter.NewImporter(buildctx).Import,
			Sizes:  compiler.llvmtypes,
		},
		Build: &buildctx.Context,
	}
	// Must use parseFiles, so we retain comments;
	// this is important for annotation processing.
	astFiles, err := parseFiles(impcfg.Fset, filenames)
	if err != nil {
		return nil, err
	}
	// If no import path is specified, or the package's
	// name (not path) is "main", then set the import
	// path to be the same as the package's name.
	if pkgname := astFiles[0].Name.String(); importpath == "" || pkgname == "main" {
		importpath = pkgname
	}
	impcfg.CreateFromFiles(importpath, astFiles...)
	// Create a "runtime" package too, so we can reference
	// its types and functions in the compiler and generated
	// code.
	if importpath != "runtime" {
		astFiles, err := parseRuntime(&buildctx.Context, impcfg.Fset)
		if err != nil {
			return nil, err
		}
		impcfg.CreateFromFiles("runtime", astFiles...)
	}
	iprog, err := impcfg.Load()
	if err != nil {
		return nil, err
	}
	program := ssa.Create(iprog, 0)
	var mainPkginfo, runtimePkginfo *loader.PackageInfo
	if pkgs := iprog.InitialPackages(); len(pkgs) == 1 {
		mainPkginfo, runtimePkginfo = pkgs[0], pkgs[0]
	} else {
		mainPkginfo, runtimePkginfo = pkgs[0], pkgs[1]
	}
	mainPkg := program.CreatePackage(mainPkginfo)

	// Create a Module, which contains the LLVM bitcode.
	modulename := importpath
	compiler.module = &Module{Module: llvm.NewModule(modulename), Name: modulename}
	compiler.module.SetTarget(compiler.TargetTriple)
	compiler.module.SetDataLayout(compiler.dataLayout)

	// Create a new translation unit.
	unit := newUnit(compiler, mainPkg)

	// Create the runtime interface.
	compiler.runtime, err = newRuntimeInterface(
		runtimePkginfo.Pkg,
		compiler.module.Module,
		compiler.llvmtypes,
		FuncResolver(unit),
	)
	if err != nil {
		return nil, err
	}

	// Create a struct responsible for mapping static types to LLVM types,
	// and to runtime/dynamic type values.
	compiler.types = NewTypeMap(
		importpath,
		compiler.llvmtypes,
		compiler.module.Module,
		compiler.runtime,
		MethodResolver(unit),
	)

	// Create a Builder, for building LLVM instructions.
	compiler.builder = llvm.GlobalContext().NewBuilder()
	defer compiler.builder.Dispose()

	// Initialise debugging.
	compiler.debug.module = compiler.module.Module
	compiler.debug.Fset = impcfg.Fset
	compiler.debug.Sizes = compiler.llvmtypes

	mainPkg.Build()
	unit.translatePackage(mainPkg)
	compiler.processAnnotations(unit, mainPkginfo)
	if runtimePkginfo != mainPkginfo {
		compiler.processAnnotations(unit, runtimePkginfo)
	}

	// Finalise debugging.
	for _, cu := range compiler.debug.cu {
		compiler.module.AddNamedMetadataOperand(
			"llvm.dbg.cu",
			compiler.debug.MDNode(cu),
		)
	}

	// Export runtime type information.
	var exportedTypes []types.Type
	for _, m := range mainPkg.Members {
		if t, ok := m.(*ssa.Type); ok && ast.IsExported(t.Name()) {
			exportedTypes = append(exportedTypes, t.Type())
		}
	}
	compiler.exportRuntimeTypes(exportedTypes, importpath == "runtime")

	if importpath == "main" {
		// Wrap "main.main" in a call to runtime.main.
		if err = compiler.createMainFunction(); err != nil {
			return nil, fmt.Errorf("failed to create main.main: %v", err)
		}
	} else {
		if err := llgoimporter.Export(buildctx, mainPkg.Object); err != nil {
			return nil, fmt.Errorf("failed to export package data: %v", err)
		}
	}

	return compiler.module, nil
}
Example #2
0
File: compiler.go Project: pcc/llgo
func (compiler *compiler) Compile(filenames []string, importpath string) (m *Module, err error) {
	// FIXME create a compilation state, rather than storing in 'compiler'.
	compiler.llvmtypes = NewLLVMTypeMap(compiler.target)

	buildctx, err := llgobuild.ContextFromTriple(compiler.TargetTriple)
	if err != nil {
		return nil, err
	}
	impcfg := &goimporter.Config{
		TypeChecker: types.Config{
			Import: llgoimporter.NewImporter(buildctx).Import,
			Sizes:  compiler.llvmtypes,
		},
		Build: &buildctx.Context,
	}
	compiler.typechecker = &impcfg.TypeChecker
	compiler.importer = goimporter.New(impcfg)
	program := ssa.NewProgram(compiler.importer.Fset, 0)
	astFiles, err := parseFiles(compiler.importer.Fset, filenames)
	if err != nil {
		return nil, err
	}
	// If no import path is specified, or the package's
	// name (not path) is "main", then set the import
	// path to be the same as the package's name.
	if pkgname := astFiles[0].Name.String(); importpath == "" || pkgname == "main" {
		importpath = pkgname
	}
	mainPkginfo := compiler.importer.CreatePackage(importpath, astFiles...)
	if mainPkginfo.Err != nil {
		return nil, mainPkginfo.Err
	}
	// First call CreatePackages to resolve imports, and then CreatePackage
	// to obtain the main package. The latter simply returns the package
	// created by the former.
	if err := program.CreatePackages(compiler.importer); err != nil {
		return nil, err
	}
	mainpkg := program.CreatePackage(mainPkginfo)

	// Create a Module, which contains the LLVM bitcode. Dispose it on panic,
	// otherwise we'll set a finalizer at the end. The caller may invoke
	// Dispose manually, which will render the finalizer a no-op.
	modulename := importpath
	compiler.module = &Module{llvm.NewModule(modulename), modulename, false}
	compiler.module.SetTarget(compiler.TargetTriple)
	compiler.module.SetDataLayout(compiler.target.String())

	// Map runtime types and functions.
	runtimePkginfo := mainPkginfo
	runtimePkg := mainpkg
	if importpath != "runtime" {
		astFiles, err := parseRuntime(&buildctx.Context, compiler.importer.Fset)
		if err != nil {
			return nil, err
		}
		runtimePkginfo = compiler.importer.CreatePackage("runtime", astFiles...)
		if runtimePkginfo.Err != nil {
			return nil, err
		}
		runtimePkg = program.CreatePackage(runtimePkginfo)
	}

	// Create a new translation unit.
	unit := newUnit(compiler, mainpkg)

	// Create the runtime interface.
	compiler.runtime, err = newRuntimeInterface(
		runtimePkg.Object,
		compiler.module.Module,
		compiler.llvmtypes,
		FuncResolver(unit),
	)
	if err != nil {
		return nil, err
	}

	// Create a struct responsible for mapping static types to LLVM types,
	// and to runtime/dynamic type values.
	compiler.types = NewTypeMap(
		importpath,
		compiler.llvmtypes,
		compiler.module.Module,
		compiler.runtime,
		MethodResolver(unit),
	)

	// Create a Builder, for building LLVM instructions.
	compiler.builder = llvm.GlobalContext().NewBuilder()
	defer compiler.builder.Dispose()

	mainpkg.Build()
	unit.translatePackage(mainpkg)
	compiler.processAnnotations(unit, mainPkginfo)
	if runtimePkginfo != mainPkginfo {
		compiler.processAnnotations(unit, runtimePkginfo)
	}

	/*
		compiler.debug_info = &llvm.DebugInfo{}
		// Compile each file in the package.
		for _, file := range files {
			if compiler.GenerateDebug {
				cu := &llvm.CompileUnitDescriptor{
					Language: llvm.DW_LANG_Go,
					Path:     llvm.FileDescriptor(fset.File(file.Pos()).Name()),
					Producer: LLGOProducer,
					Runtime:  LLGORuntimeVersion,
				}
				compiler.pushDebugContext(cu)
				compiler.pushDebugContext(&cu.Path)
			}
			for _, decl := range file.Decls {
				compiler.VisitDecl(decl)
			}
			if compiler.GenerateDebug {
				compiler.popDebugContext()
				cu := compiler.popDebugContext()
				if len(compiler.debug_context) > 0 {
					log.Panicln(compiler.debug_context)
				}
				compiler.module.AddNamedMetadataOperand(
					"llvm.dbg.cu",
					compiler.debug_info.MDNode(cu),
				)
			}
		}
	*/

	// Export runtime type information.
	var exportedTypes []types.Type
	for _, m := range mainpkg.Members {
		if t, ok := m.(*ssa.Type); ok && ast.IsExported(t.Name()) {
			exportedTypes = append(exportedTypes, t.Type())
		}
	}
	compiler.exportRuntimeTypes(exportedTypes, importpath == "runtime")

	if importpath == "main" {
		// Wrap "main.main" in a call to runtime.main.
		if err = compiler.createMainFunction(); err != nil {
			return nil, fmt.Errorf("failed to create main.main: %v", err)
		}
	} else {
		if err := llgoimporter.Export(buildctx, mainpkg.Object); err != nil {
			return nil, fmt.Errorf("failed to export package data: %v", err)
		}
	}

	return compiler.module, nil
}