Add packages for the new compiler

Issue: https://github.com/dart-lang/sdk/issues/61635
Change-Id: I9bd9f0dc94df5797d6c66aa575bae6599f6f6228
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/453100
Reviewed-by: Stephen Adams <sra@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>

pkg/cfg/OWNERS

@@ -0,0 +1,6 @@
+set noparent
+alexmarkov@google.com
+sra@google.com
+vegorov@google.com
+# Global owners.
+file:/OWNERS

pkg/cfg/README.md

@@ -0,0 +1,20 @@
+This package defines control flow graph (CFG) intermediate representation of
+Dart programs and optimization passes performed on CFG.
+
+This package is intended to be used only by Dart compiler(s) in the Dart SDK.
+
+Structure of the package:
+```
+  front_end/  # Translation from kernel AST to CFG.
+  ir/         # CFG/SSA IR and computation of its properties.
+  passes/     # Optimization passes.
+  utils/      # General-purpose utilities.
+```
+
+## Status: experimental
+
+**NOTE**: This package is currently experimental and not published or
+included in the SDK.
+
+Do not take dependency on this package unless you are prepared for
+breaking changes and possibly removal of this code at any point in time.

pkg/cfg/analysis_options.yaml

@@ -0,0 +1,5 @@
+# Copyright (c) 2025, 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.
+
+include: package:lints/core.yaml

pkg/cfg/pubspec.yaml

@@ -0,0 +1,14 @@
+name: cfg
+description: CFG/SSA compiler IR and optimization passes.
+# This package is not intended for consumption on pub.dev. DO NOT publish.
+publish_to: none
+
+environment:
+  sdk: ^3.7.0
+
+resolution: workspace
+
+# Use 'any' constraints here; we get our versions from the DEPS file.
+dependencies:
+
+dev_dependencies:

pkg/native_compiler/OWNERS

@@ -0,0 +1,6 @@
+set noparent
+alexmarkov@google.com
+sra@google.com
+vegorov@google.com
+# Global owners.
+file:/OWNERS

pkg/native_compiler/README.md

@@ -0,0 +1,9 @@
+This package hosts compiler targeting native platforms.
+
+## Status: experimental
+
+**NOTE**: This package is currently experimental and not published or
+included in the SDK.
+
+Do not take dependency on this package unless you are prepared for
+breaking changes and possibly removal of this code at any point in time.

pkg/native_compiler/analysis_options.yaml

@@ -0,0 +1,5 @@
+# Copyright (c) 2025, 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.
+
+include: package:lints/core.yaml

pkg/native_compiler/pubspec.yaml

@@ -0,0 +1,14 @@
+name: native_compiler
+description: Compiler targeting native platforms
+# This package is not intended for consumption on pub.dev. DO NOT publish.
+publish_to: none
+
+environment:
+  sdk: ^3.7.0
+
+resolution: workspace
+
+# Use 'any' constraints here; we get our versions from the DEPS file.
+dependencies:
+
+dev_dependencies:

pubspec.yaml

@@ -26,6 +26,7 @@ workspace:
   - pkg/async_helper
   - pkg/bisect_dart
   - pkg/build_integration
+  - pkg/cfg
   - pkg/compiler
   - pkg/dart2bytecode
   - pkg/dart2js_info
@@ -58,6 +59,7 @@ workspace:
   - pkg/meta
   - pkg/mmap
   - pkg/modular_test
+  - pkg/native_compiler
   - pkg/native_stack_traces
   - pkg/node_preamble
   - pkg/record_use