| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// Defines the VM-specific translation of Dart source code to kernel binaries. |
| library vm.kernel_front_end; |
| |
| import 'dart:async'; |
| |
| import 'package:front_end/src/api_prototype/compiler_options.dart' |
| show CompilerOptions, ErrorHandler; |
| import 'package:front_end/src/api_prototype/kernel_generator.dart' |
| show kernelForProgram; |
| import 'package:front_end/src/api_prototype/compilation_message.dart' |
| show CompilationMessage, Severity; |
| import 'package:front_end/src/fasta/severity.dart' show Severity; |
| import 'package:kernel/ast.dart' show Program; |
| import 'package:kernel/core_types.dart' show CoreTypes; |
| |
| import 'transformations/devirtualization.dart' as devirtualization |
| show transformProgram; |
| import 'transformations/no_dynamic_invocations_annotator.dart' |
| as no_dynamic_invocations_annotator show transformProgram; |
| import 'transformations/type_flow/transformer.dart' as globalTypeFlow |
| show transformProgram; |
| |
| // Flag to enable global type flow analysis and related transformations. |
| const kUseGlobalTypeFlow = const bool.fromEnvironment('use.global.type.flow'); |
| |
| /// Generates a kernel representation of the program whose main library is in |
| /// the given [source]. Intended for whole program (non-modular) compilation. |
| /// |
| /// VM-specific replacement of [kernelForProgram]. |
| /// |
| Future<Program> compileToKernel(Uri source, CompilerOptions options, |
| {bool aot: false}) async { |
| // Replace error handler to detect if there are compilation errors. |
| final errorDetector = |
| new ErrorDetector(previousErrorHandler: options.onError); |
| options.onError = errorDetector; |
| |
| final program = await kernelForProgram(source, options); |
| |
| // Restore error handler (in case 'options' are reused). |
| options.onError = errorDetector.previousErrorHandler; |
| |
| // Run global transformations only if program is correct. |
| if (aot && (program != null) && !errorDetector.hasCompilationErrors) { |
| _runGlobalTransformations(program, options.strongMode); |
| } |
| |
| return program; |
| } |
| |
| _runGlobalTransformations(Program program, bool strongMode) { |
| if (strongMode) { |
| final coreTypes = new CoreTypes(program); |
| |
| if (kUseGlobalTypeFlow) { |
| globalTypeFlow.transformProgram(coreTypes, program); |
| } else { |
| devirtualization.transformProgram(coreTypes, program); |
| } |
| |
| no_dynamic_invocations_annotator.transformProgram(program); |
| } |
| } |
| |
| class ErrorDetector { |
| final ErrorHandler previousErrorHandler; |
| bool hasCompilationErrors = false; |
| |
| ErrorDetector({this.previousErrorHandler}); |
| |
| void call(CompilationMessage message) { |
| if ((message.severity != Severity.nit) && |
| (message.severity != Severity.warning)) { |
| hasCompilationErrors = true; |
| } |
| |
| previousErrorHandler?.call(message); |
| } |
| } |