org.robovm.compiler.llvm.Getelementptr 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.Set;
/**
*
* @version $Id$
*/
public class Getelementptr extends Instruction {
private final Variable result;
private final Value ptr;
private final Value[] idx;
public Getelementptr(Variable result, Value ptr, int ... idx) {
if (!ptr.isPointer()) {
throw new IllegalArgumentException("PointerType expected");
}
if (idx.length > 1 && !(((PointerType) ptr.getType()).getBase() instanceof AggregateType)) {
throw new IllegalArgumentException("PointerType should point to AggregateType");
}
if (idx == null || idx.length == 0) {
throw new IllegalArgumentException("No indexes");
}
this.result = result;
this.ptr = ptr;
this.idx = new Value[idx.length];
for (int i = 0; i < idx.length; i++) {
this.idx[i] = new IntegerConstant(idx[i]);
}
}
public Getelementptr(Variable result, Value ptr, Value ... idx) {
if (!ptr.isPointer()) {
throw new IllegalArgumentException("PointerType expected");
}
if (idx.length > 1 && !(((PointerType) ptr.getType()).getBase() instanceof AggregateType)) {
throw new IllegalArgumentException("PointerType should point to AggregateType");
}
if (idx == null || idx.length == 0) {
throw new IllegalArgumentException("No indexes");
}
this.result = result;
this.ptr = ptr;
this.idx = idx;
}
@Override
public Set getWritesTo() {
return Collections.singleton(result);
}
@Override
public Set getReadsFrom() {
if (ptr instanceof VariableRef) {
return Collections.singleton((VariableRef) ptr);
}
return super.getReadsFrom();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(result);
sb.append(" = getelementptr ");
sb.append(ptr.getType());
sb.append(' ');
sb.append(ptr);
for (int i = 0; i < idx.length; i++) {
sb.append(", ");
sb.append(idx[i].getType());
sb.append(" ");
sb.append(idx[i]);
}
return sb.toString();
}
}