org.nd4j.autodiff.samediff.optimize.optimizations.OptimizationUtils Maven / Gradle / Ivy
The newest version!
/*
* ******************************************************************************
* *
* *
* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.
* *
* * SPDX-License-Identifier: Apache-2.0
* *****************************************************************************
*/
package org.nd4j.autodiff.samediff.optimize.optimizations;
import lombok.NonNull;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.autodiff.samediff.internal.SameDiffOp;
import org.nd4j.autodiff.samediff.internal.Variable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class OptimizationUtils {
private OptimizationUtils(){ }
public static void replaceOpInputsWith(SameDiff sd, @NonNull String replaceInput, @NonNull String newInput){
if(replaceInput.equals(newInput))
return;
//Update op input structure: Replace all instances replaceInput->X with newInput->X
Collection ops = sd.getOps().values();
for(SameDiffOp o : ops){
List l = o.getInputsToOp();
while(l != null && l.contains(replaceInput)){
int idx = l.indexOf(replaceInput);
l.set(idx, newInput);
}
}
//Update variable structure
Variable v = sd.getVariables().get(replaceInput);
Variable v2 = sd.getVariables().get(newInput);
//NOTE: this only works if we carefully control the order in which replaceOpInputsWith is called!
v2.setInputsForOp(v.getInputsForOp());
v.setInputsForOp(new ArrayList());
}
public static void removeOp(@NonNull SameDiff sd, @NonNull String opToRemove){
SameDiffOp op = sd.getOps().remove(opToRemove);
for(String s : op.getInputsToOp()){
Variable v = sd.getVariables().get(s);
v.getInputsForOp().remove(op.getName());
}
}
public static void removeVariable(@NonNull SameDiff sd, @NonNull String varToRemove){
sd.getVariables().remove(varToRemove);
}
}