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a4dd314c9e
When iterating on core library changes or changes in the AOT compiler
many seconds are wasted waiting on gen_kernel/compile_platform to
parse Dart code. This happens because we are running these tools
from sources on prebuilt Dart SDK.
This CL allows SDK developer to opt-in into AOT compiling these
tools by adding `precompile_tools=true` to their DART_GN_ARGS.
AOT compilation is performed using prebuilt SDK - so these
executables do not need to be recompiled if core libraries or
VM changes reducing iteration cycles.
pkg/vm/tool/precompiler2 is tweaked to detect when DART_GN_ARGS
contains `precompile_tools=true` and use precompiled
gen_kernel.exe instead of running it from source.
Using precompiled compile_platform takes vm_platform_strong.dill
build from 20 seconds to 3 seconds.
Using precompiled gen_kernel takes small benchmark build from
~10 seconds to 2 seconds.
This relands 5cda2a871c with fixes
for Flutter build.
TEST=manually tested
Change-Id: I552861c80c152890655e41baaf6ea3fb3b03a57e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/367961
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
60 lines
1.8 KiB
Plaintext
60 lines
1.8 KiB
Plaintext
# Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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import("../build/dart/dart_action.gni")
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import("../sdk_args.gni")
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_dart_root = get_path_info("..", "abspath")
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template("aot_compile_using_prebuilt_sdk") {
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action(target_name) {
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forward_variables_from(invoker,
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[
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"deps",
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"pool",
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"testonly",
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"visibility",
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])
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script = "$_dart_root/build/gn_dart_compile_exe.py"
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inputs = [
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invoker.entry_point,
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invoker.package_config,
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]
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outputs = [ invoker.output ]
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depfile = invoker.output + ".d"
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# TODO(vegorov): support RBE by using rewrapper script.
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args = [
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"--dart-sdk",
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rebase_path("$_dart_root/tools/sdks/dart-sdk", root_build_dir),
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"--sdk-hash",
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"$sdk_hash",
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"--entry-point",
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rebase_path(invoker.entry_point, root_build_dir),
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"--output",
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rebase_path(invoker.output, root_build_dir),
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"--packages",
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rebase_path(invoker.package_config, root_build_dir),
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"--depfile",
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rebase_path(depfile, root_build_dir),
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]
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}
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}
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aot_compile_using_prebuilt_sdk("compile_platform.exe") {
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entry_point = "$_dart_root/pkg/front_end/tool/_fasta/compile_platform.dart"
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output = "$root_out_dir/compile_platform.exe"
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package_config = "$_dart_root/.dart_tool/package_config.json"
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}
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aot_compile_using_prebuilt_sdk("gen_kernel.exe") {
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entry_point = "$_dart_root/pkg/vm/bin/gen_kernel.dart"
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output = "$root_out_dir/gen_kernel.exe"
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package_config = "$_dart_root/.dart_tool/package_config.json"
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}
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