Example usage for org.objectweb.asm Opcodes IFEQ

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes IFEQ.

Prototype

int IFEQ

To view the source code for org.objectweb.asm Opcodes IFEQ.

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Usage

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformArmorTexture(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_FUNC110241CB, false));
    needle.add(new VarInsnNode(Opcodes.ISTORE, 3));

    AbstractInsnNode node = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    LabelNode l17 = new LabelNode();
    newInstr.add(l17);//  w  ww  .  j  av a2  s  .c om
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_GET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(new VarInsnNode(Opcodes.ASTORE, 4));
    LabelNode l18 = new LabelNode();
    newInstr.add(l18);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode l19 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, l19));
    LabelNode l20 = new LabelNode();
    newInstr.add(l20);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_FIELD110280BR));
    newInstr.add(new InsnNode(Opcodes.ICONST_2));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.CHECKCAST, ASMNames.CL_ITEM_HORSE_ARMOR));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_GET_ARMOR_TEXTURE, false));
    newInstr.add(new InsnNode(Opcodes.AASTORE));
    LabelNode l21 = new LabelNode();
    newInstr.add(l21);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new TypeInsnNode(Opcodes.NEW, ASMNames.CL_STRING_BUILDER));
    newInstr.add(new InsnNode(Opcodes.DUP));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_FIELD110286BQ));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESTATIC, ASMNames.MD_STRING_VALUE_OF, false));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_STRINGBUILDER_INIT, false));
    newInstr.add(new LdcInsnNode("cst-"));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_APPEND, false));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_UNLOC_NAME, false));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_APPEND, false));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_TO_STRING, false));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.PUTFIELD, ASMNames.FD_HORSE_FIELD110286BQ));
    newInstr.add(new InsnNode(Opcodes.RETURN));
    newInstr.add(l19);

    method.instructions.insert(node, newInstr);
}

---

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformIsValidArmor(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_IRON_HORSE_ARMOR));
    needle.add(new JumpInsnNode(Opcodes.IF_ACMPEQ, new LabelNode()));

    AbstractInsnNode node = ASMHelper.findFirstNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode ln = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, ln));
    newInstr.add(new LabelNode());
    newInstr.add(new InsnNode(Opcodes.ICONST_1));
    newInstr.add(new InsnNode(Opcodes.IRETURN));
    newInstr.add(ln);//from   w  ww .ja va  2  s.com

    method.instructions.insertBefore(node, newInstr);
}

---

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformInteract(MethodNode method) {

    InsnList needle = new InsnList();
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_DIAMOND_HORSE_ARMOR));
    needle.add(new JumpInsnNode(Opcodes.IF_ACMPNE, new LabelNode()));
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new InsnNode(Opcodes.ICONST_3));
    needle.add(new VarInsnNode(Opcodes.ISTORE, 4));
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new FrameNode(Opcodes.F_SAME, 0, null, 0, null));

    AbstractInsnNode node = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 2));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode l8 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, l8));
    newInstr.add(new LabelNode());
    newInstr.add(new InsnNode(Opcodes.ICONST_4));
    newInstr.add(new VarInsnNode(Opcodes.ISTORE, 4));
    newInstr.add(l8);// w w w .  java 2s. co m
    newInstr.add(new FrameNode(Opcodes.F_SAME, 0, null, 0, null));

    method.instructions.insert(node, newInstr);
}

---

From source file:de.sanandrew.core.manpack.transformer.TransformPlayerDismountCtrl.java

License:Creative Commons License

/**
 * Transforms the EntityPlayer.class by hooking into the updateRidden method and adding a call to _SAP_canDismountOnInput
 * in order for the ridden entity to control whether or not the rider can dismount via sneaking.
 *
 * @param bytes     the class bytes to be transformed
 * @return the transformed class bytes//from  w  w w . j  a  va2  s.co m
 */
private static byte[] transformPlayer(byte[] bytes) {
    ClassNode clazz = ASMHelper.createClassNode(bytes);
    MethodNode method = ASMHelper.findMethod(clazz, ASMNames.MD_PLAYER_UPDATE_RIDDEN);

    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_WORLD_OBJ));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_WORLD_IS_REMOTE));
    LabelNode ln1 = new LabelNode();
    needle.add(new JumpInsnNode(Opcodes.IFNE, ln1));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_PLAYER_IS_SNEAKING, false));
    needle.add(new JumpInsnNode(Opcodes.IFEQ, ln1));

    AbstractInsnNode insertPoint = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList injectList = new InsnList();
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_RIDING_ENTITY));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_CAN_DISMOUNT_ON_INPUT, false));
    injectList.add(new JumpInsnNode(Opcodes.IFEQ, ((JumpInsnNode) insertPoint).label));

    method.instructions.insert(insertPoint, injectList);

    bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS);

    return bytes;
}

---

From source file:de.scoopgmbh.copper.instrument.BuildStackInfoAdapter.java

License:Apache License

@Override
public void visitJumpInsn(int arg0, Label arg1) {
    savePreviousFrame();/*w  w w.j  ava 2  s . co  m*/
    switch (arg0) {
    case Opcodes.IF_ACMPEQ:
    case Opcodes.IF_ACMPNE:
    case Opcodes.IF_ICMPEQ:
    case Opcodes.IF_ICMPGE:
    case Opcodes.IF_ICMPGT:
    case Opcodes.IF_ICMPLE:
    case Opcodes.IF_ICMPLT:
    case Opcodes.IF_ICMPNE:
        currentFrame.popStack();
    case Opcodes.IFEQ:
    case Opcodes.IFGE:
    case Opcodes.IFGT:
    case Opcodes.IFLE:
    case Opcodes.IFLT:
    case Opcodes.IFNE:
    case Opcodes.IFNONNULL:
    case Opcodes.IFNULL:
        currentFrame.popStack();
    case Opcodes.GOTO:
        forwardFrames.put(arg1, new StackInfo(currentFrame));
        break;
    case Opcodes.JSR:
        currentFrame.pushStack(retAddressType);
        forwardFrames.put(arg1, new StackInfo(currentFrame));
        break;
    default:
        logger.debug("Unhandled: ");
    }
    if (logger.isDebugEnabled())
        logger.debug("jumpInsn " + getOpCode(arg0) + " " + arg1);
    delegate.visitJumpInsn(arg0, arg1);
}

---

From source file:de.scoopgmbh.copper.instrument.TryCatchBlockHandler.java

License:Apache License

@SuppressWarnings("unchecked")
public void instrument(ClassNode cn) {
    //if (1 == 1) return;

    for (MethodNode m : (List<MethodNode>) cn.methods) {
        if (!m.exceptions.contains(INTERRUPT_EXCEPTION_NAME) || m.tryCatchBlocks.isEmpty()) {
            continue;
        }//w w  w.j  a va  2  s. c o m
        logger.info("Instrument " + cn.name + "." + m.name);
        HashSet<Label> labels = new HashSet<Label>();
        for (TryCatchBlockNode catchNode : (List<TryCatchBlockNode>) m.tryCatchBlocks) {
            if (labels.contains(catchNode.handler.getLabel())) {
                // some handlers share their handling code - check it out to prevent double instrumentation
                logger.info("skipping node");
                continue;
            }
            labels.add(catchNode.handler.getLabel());

            LabelNode labelNode = catchNode.handler;
            AbstractInsnNode lineNumberNode = labelNode.getNext() instanceof LineNumberNode
                    ? labelNode.getNext()
                    : labelNode;
            FrameNode frameNode = (FrameNode) lineNumberNode.getNext();
            VarInsnNode varInsnNode = (VarInsnNode) frameNode.getNext();
            AbstractInsnNode insertPoint = varInsnNode;

            if (catchNode.type == null) {
                // this is probably a finally block;
                if (insertPoint.getNext() != null && insertPoint.getNext() instanceof LabelNode) {
                    insertPoint = insertPoint.getNext();
                }
            }

            LabelNode labelNode4ifeg = new LabelNode();
            InsnList newCode = new InsnList();
            newCode.add(new VarInsnNode(Opcodes.ALOAD, varInsnNode.var));
            newCode.add(new TypeInsnNode(Opcodes.INSTANCEOF, INTERRUPT_EXCEPTION_NAME));
            newCode.add(new JumpInsnNode(Opcodes.IFEQ, labelNode4ifeg));
            newCode.add(new VarInsnNode(Opcodes.ALOAD, varInsnNode.var));
            newCode.add(new TypeInsnNode(Opcodes.CHECKCAST, INTERRUPT_EXCEPTION_NAME));
            newCode.add(new InsnNode(Opcodes.ATHROW));
            newCode.add(labelNode4ifeg);
            m.instructions.insert(insertPoint, newCode);
        }
    }
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.controlflow.ConstantIfInliner.java

License:Open Source License

private boolean evalSingleOpValue(final Number op1, final int opcode) {
    switch (opcode) {
    case Opcodes.IFEQ:
        return op1.intValue() == 0;
    case Opcodes.IFNE:
        return op1.intValue() != 0;
    case Opcodes.IFLT:
        return op1.intValue() < 0;
    case Opcodes.IFGE:
        return op1.intValue() >= 0;
    case Opcodes.IFGT:
        return op1.intValue() > 0;
    case Opcodes.IFLE:
        return op1.intValue() <= 0;
    case Opcodes.IFNULL:
        return op1 == null;
    case Opcodes.IFNONNULL:
        return op1 != null;
    default:/*from   w  w  w.  jav a2 s .  co m*/
        return false;
    }
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.controlflow.ConstantIfInlinerTest.java

License:Open Source License

/**
 * Tests that constantIfInliner is working correctly.
 * //from w w w.j a v a2 s .co m
 * Input is
 * 
 * <pre>
 * if(a)
 * ...
 * </pre>
 * 
 * where a is true
 * 
 * @throws JBOPClassException
 *           the jBOP class exception
 */
@Test
public void testConstantIfInlinerIFEQ() throws JBOPClassException {
    // INIT
    final LabelNode label = new LabelNode();
    builder.addInsn(new InsnNode(Opcodes.ICONST_1)).//
            addInsn(new JumpInsnNode(Opcodes.IFEQ, label)).//
            addInsn(new InsnNode(Opcodes.NOP)).//
            addInsn(label).//
            addInsn(new InsnNode(Opcodes.RETURN));

    // RUN
    assertEquals(5, method.instructions.size());
    final InsnList optimized = constantIfInliner.optimize(method.instructions, method);

    // ASSERT
    assertEquals(3, optimized.size());
    assertEquals(Opcodes.NOP, optimized.get(0).getOpcode());
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.loop.ForLoop.java

License:Open Source License

private boolean eval(final int i, final int loopCount, final int ifNode) {
    if (ifNode == Opcodes.IF_ICMPLE) {
        return i <= loopCount;
    }//  w  ww. ja  v a 2s  . c om
    if (ifNode == Opcodes.IF_ICMPEQ) {
        return i == loopCount;
    }
    if (ifNode == Opcodes.IF_ICMPGE) {
        return i >= loopCount;
    }
    if (ifNode == Opcodes.IF_ICMPGT) {
        return i > loopCount;
    }
    if (ifNode == Opcodes.IF_ICMPLT) {
        return i < loopCount;
    }
    if (ifNode == Opcodes.IF_ICMPNE) {
        return i != loopCount;
    }
    if (ifNode == Opcodes.IFGE) {
        return i >= 0;
    }
    if (ifNode == Opcodes.IFEQ) {
        return i == 0;
    }
    if (ifNode == Opcodes.IFGT) {
        return i > 0;
    }
    if (ifNode == Opcodes.IFLE) {
        return i <= 0;
    }
    if (ifNode == Opcodes.IFLT) {
        return i < 0;
    }
    if (ifNode == Opcodes.IFNE) {
        return i != 0;
    }
    return false;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.utils.NodeHelper.java

License:Open Source License

/**
 * Returns true if node is an one-param-if-Statement.
 * /*from   w  w w.ja v  a 2 s.  co  m*/
 * @param node
 *          the node
 * @return true if node is one value if
 */
public static boolean isOneValueIf(final AbstractInsnNode node) {
    if (node == null) {
        return false;
    }
    if (node.getOpcode() == Opcodes.IFNULL) {
        return true;
    }
    if (node.getOpcode() == Opcodes.IFNONNULL) {
        return true;
    }
    if (node.getOpcode() >= Opcodes.IFEQ && node.getOpcode() <= Opcodes.IFLE) {
        return true;
    }
    return false;
}

---

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