1 /*
   2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.nodes.graphbuilderconf;
  26 
  27 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
  28 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
  29 import org.graalvm.compiler.nodes.ValueNode;
  30 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
  31 
  32 import jdk.vm.ci.meta.JavaKind;
  33 import jdk.vm.ci.meta.ResolvedJavaMethod;
  34 
  35 /**
  36  * {@link InvocationPlugin} for converting a method call directly to a foreign call.
  37  */
  38 public final class ForeignCallPlugin implements InvocationPlugin {
  39     private final ForeignCallsProvider foreignCalls;
  40     private final ForeignCallDescriptor descriptor;
  41 
  42     public ForeignCallPlugin(ForeignCallsProvider foreignCalls, ForeignCallDescriptor descriptor) {
  43         this.foreignCalls = foreignCalls;
  44         this.descriptor = descriptor;
  45     }
  46 
  47     @Override
  48     public boolean execute(GraphBuilderContext b, ResolvedJavaMethod targetMethod, InvocationPlugin.Receiver receiver, ValueNode[] args) {
  49         ForeignCallNode foreignCall = new ForeignCallNode(foreignCalls, descriptor, args);
  50         foreignCall.setBci(b.bci());
  51         if (targetMethod.getSignature().getReturnKind() == JavaKind.Void) {
  52             b.add(foreignCall);
  53         } else {
  54             b.addPush(targetMethod.getSignature().getReturnKind(), foreignCall);
  55         }
  56         return true;
  57     }
  58 }