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OptimizeCalls.java
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OptimizeCalls.java
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/*
* Copyright 2010 The Closure Compiler Authors.
*
* 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.javascript.jscomp;
import com.google.javascript.rhino.Node;
import java.util.ArrayList;
import java.util.List;
/**
* A root pass that container for other passes that should run on
* with a single call graph (currently a DefinitionUseSiteFinder).
* Expected passes include:
* - optimize parameters
* - optimize returns
* - devirtualize prototype methods
*
* @author johnlenz@google.com (John Lenz)
*/
class OptimizeCalls implements CompilerPass {
List<CallGraphCompilerPass> passes = new ArrayList<>();
private AbstractCompiler compiler;
OptimizeCalls(AbstractCompiler compiler) {
this.compiler = compiler;
}
OptimizeCalls addPass(CallGraphCompilerPass pass) {
passes.add(pass);
return this;
}
interface CallGraphCompilerPass {
void process(Node externs, Node root, DefinitionUseSiteFinder definitions);
}
@Override
public void process(Node externs, Node root) {
if (!passes.isEmpty()) {
DefinitionUseSiteFinder defFinder = new DefinitionUseSiteFinder(compiler);
defFinder.process(externs, root);
compiler.setDefinitionFinder(defFinder);
for (CallGraphCompilerPass pass : passes) {
pass.process(externs, root, defFinder);
}
}
}
}