// Copyright 2017 The Bazel Authors. 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 com.google.devtools.build.lib.rules.cpp.transitions;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.analysis.config.PatchTransition;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.rules.cpp.CppOptions;
import com.google.devtools.build.lib.rules.cpp.CppOptions.LipoConfigurationState;
/**
* Configuration transition that turns on LIPO/FDO settings for configurations that have them
* disabled.
*/
public class EnableLipoTransition implements PatchTransition {
private final Label ruleLabel;
/**
* Creates a new transition that only triggers on the given rule. This can be used for
* restricting this transition to the LIPO context binary.
*/
public EnableLipoTransition(Label ruleLabel) {
this.ruleLabel = ruleLabel;
}
@Override
public BuildOptions apply(BuildOptions options) {
CppOptions cppOptions = options.get(CppOptions.class);
if (!cppOptions.isDataConfigurationForLipoOptimization()
|| !ruleLabel.equals(cppOptions.getLipoContextForBuild())) {
return options;
}
BuildOptions lipoEnabledOptions = options.clone();
lipoEnabledOptions.get(CppOptions.class).lipoConfigurationState =
LipoConfigurationState.APPLY_LIPO;
return lipoEnabledOptions;
}
@Override
public boolean defaultsToSelf() {
return false;
}
}