// 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.rules.cpp.CppOptions;
import com.google.devtools.build.lib.rules.cpp.FdoSupport;
/**
* Configuration transition that enters "LIPO context collector" mode on a
* "LIPO optimization"-enabled input configuration.
*
* <p>See {@link FdoSupport} for details.
*/
public class LipoContextCollectorTransition implements PatchTransition {
public static final LipoContextCollectorTransition INSTANCE =
new LipoContextCollectorTransition();
private LipoContextCollectorTransition() {}
@Override
public BuildOptions apply(BuildOptions options) {
// If this target and its transitive closure don't have C++ options, there's no
// LIPO context to change.
if (!options.contains(CppOptions.class)) {
return options;
}
CppOptions cppOptions = options.get(CppOptions.class);
if (!cppOptions.isLipoOptimization()) {
return options;
}
BuildOptions collectorOptions = options.clone();
collectorOptions.get(CppOptions.class).lipoConfigurationState =
CppOptions.LipoConfigurationState.LIPO_CONTEXT_COLLECTOR;
return collectorOptions;
}
@Override
public boolean defaultsToSelf() {
return false;
}
}