package org.jruby.ir.passes;
import java.util.ArrayList;
import java.util.List;
import org.jruby.ir.IRScope;
import org.jruby.ir.dataflow.analyses.LiveVariablesProblem;
public class LiveVariableAnalysis extends CompilerPass {
public static List<Class<? extends CompilerPass>> DEPENDENCIES = new ArrayList<Class<? extends CompilerPass>>() {{
add(CFGBuilder.class);
}};
public String getLabel() {
return "Live Variable Analysis";
}
@Override
public List<Class<? extends CompilerPass>> getDependencies() {
return DEPENDENCIES;
}
@Override
public Object previouslyRun(IRScope scope) {
return scope.getDataFlowSolution(LiveVariablesProblem.NAME);
}
public Object execute(IRScope scope, Object... data) {
LiveVariablesProblem lvp = new LiveVariablesProblem(scope);
lvp.compute_MOP_Solution();
scope.setDataFlowSolution(LiveVariablesProblem.NAME, lvp);
return lvp;
}
@Override
public void invalidate(IRScope scope) {
scope.setDataFlowSolution(LiveVariablesProblem.NAME, null);
}
}