| /* |
| * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.interpreter; |
| |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class BytecodeLoad extends BytecodeLoadStore { |
| BytecodeLoad(Method method, int bci) { |
| super(method, bci); |
| } |
| |
| public void verify() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isValid(), "check load"); |
| } |
| } |
| |
| public boolean isValid() { |
| int jcode = javaCode(); |
| switch (jcode) { |
| case Bytecodes._iload: |
| case Bytecodes._lload: |
| case Bytecodes._fload: |
| case Bytecodes._dload: |
| case Bytecodes._aload: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| public static BytecodeLoad at(Method method, int bci) { |
| BytecodeLoad b = new BytecodeLoad(method, bci); |
| if (Assert.ASSERTS_ENABLED) { |
| b.verify(); |
| } |
| return b; |
| } |
| |
| /** Like at, but returns null if the BCI is not at load */ |
| public static BytecodeLoad atCheck(Method method, int bci) { |
| BytecodeLoad b = new BytecodeLoad(method, bci); |
| return (b.isValid() ? b : null); |
| } |
| |
| public static BytecodeLoad at(BytecodeStream bcs) { |
| return new BytecodeLoad(bcs.method(), bcs.bci()); |
| } |
| } |