org.robovm.compiler.llvm.Br Maven / Gradle / Ivy
/*
* Copyright (C) 2012 Trillian Mobile AB
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package org.robovm.compiler.llvm;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
*
* @version $Id$
*/
public class Br extends Instruction {
private final Value cond;
private final BasicBlockRef destTrue;
private final BasicBlockRef destFalse;
public Br(BasicBlockRef dest) {
this.cond = null;
this.destTrue = dest;
this.destFalse = null;
}
public Br(Value cond, BasicBlockRef destTrue, BasicBlockRef destFalse) {
if (cond.getType() != Type.I1) {
throw new IllegalArgumentException("Condition must have type " + Type.I1);
}
this.cond = cond;
this.destTrue = destTrue;
this.destFalse = destFalse;
}
@Override
public Set getReadsFrom() {
if (cond instanceof VariableRef) {
return Collections.singleton((VariableRef) cond);
}
return super.getReadsFrom();
}
@Override
public Set getBranchTargets() {
Set result = new HashSet<>();
result.add(destTrue);
if (cond != null) {
result.add(destFalse);
}
return result;
}
@Override
public String toString() {
if (cond != null) {
return "br i1 " + cond + ", label %" + destTrue.getName() + ", label %" + destFalse.getName();
}
return "br label %" + destTrue.getName();
}
}