Example usage for org.objectweb.asm.tree LdcInsnNode clone

Introduction

In this page you can find the example usage for org.objectweb.asm.tree LdcInsnNode clone.

Prototype

@Override
    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) 

Source Link

Usage

From source file:pxb.android.dex2jar.optimize.B.java

License:Apache License

/**
 * <pre>//  w w  w  .j  a v  a 2s .com
 * BEFORE:
 *     LDC Ljavax/servlet/GenericServlet;.class
 *     ASTORE 1
 *     LDC "/javax/servlet/LocalStrings.properties"
 *     ASTORE 2
 *     ALOAD 1
 *     ALOAD 2
 *     INVOKEVIRTUAL Ljava/lang/Class;.getResourceAsStream (Ljava/lang/String;)Ljava/io/InputStream;
 *     ASTORE 1
 *     NEW Ljava/util/PropertyResourceBundle;
 *     DUP
 *     ALOAD 1
 *     INVOKESPECIAL Ljava/util/PropertyResourceBundle;.&lt;init> (Ljava/io/InputStream;)V
 *     ASTORE 0
 *     ALOAD 0
 *     PUTSTATIC Ljavax/servlet/GenericServlet;.lStrings : Ljava/util/ResourceBundle;
 * </pre>
 * 
 * <pre>
 * AFTER:
 *     LDC Ljavax/servlet/GenericServlet;.class
 *     LDC "/javax/servlet/LocalStrings.properties"
 *     INVOKEVIRTUAL Ljava/lang/Class;.getResourceAsStream (Ljava/lang/String;)Ljava/io/InputStream;
 *     ASTORE 1
 *     NEW Ljava/util/PropertyResourceBundle;
 *     DUP
 *     ALOAD 1
 *     INVOKESPECIAL Ljava/util/PropertyResourceBundle;.&lt;init> (Ljava/io/InputStream;)V
 *     ASTORE 0
 *     ALOAD 0
 *     PUTSTATIC Ljavax/servlet/GenericServlet;.lStrings : Ljava/util/ResourceBundle;
 * </pre>
 * 
 * @param block
 */
private void doLdc(Block block) {
    Map<Integer, LdcInsnNode> map = new HashMap<Integer, LdcInsnNode>();
    AbstractInsnNode p = block.first.getNext();
    while (p != null && p != block.last) {
        if (p.getOpcode() == Opcodes.LDC) {
            AbstractInsnNode q = p.getNext();
            if (isWrite(q)) {
                Integer var = var(q);
                if (block.out.get(var) == null || block.out.get(var) != q) {
                    map.put(var, (LdcInsnNode) p);
                    insnList.remove(q); // remove store
                    q = p.getPrevious();
                    insnList.remove(p); // remove ldc
                    p = q;
                }
            }
        } else if (isRead(p)) {
            Integer var = var(p);
            if (block.out.get(var) == null || block.out.get(var) != p) {
                LdcInsnNode ldc = map.get(var);
                if (ldc != null) {
                    AbstractInsnNode _ldc_copy = ldc.clone(null);
                    insnList.insert(p, _ldc_copy);
                    insnList.remove(p);
                    p = _ldc_copy;
                }
            }
        } else if (isWrite(p)) {
            Integer var = var(p);
            map.remove(var);
        }
        p = p.getNext();
    }
}

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From source file:pxb.android.dex2jar.optimize.B.java

License:Apache License

private boolean doOptmizeFirstBlockLdc(LdcInsnNode node, int r, Block block,
        Map<Block, Boolean> couldReplaceBlockIds, Set<Block> replacedBlockIds) {
    if (replacedBlockIds.contains(block)) {
        return true;
    }/*  w  ww .j  a v  a 2  s . c  o  m*/
    replacedBlockIds.add(block);
    if (couldReplace(r, block, couldReplaceBlockIds)) {
        AbstractInsnNode p = block.first.getNext();
        while (p != null && p != block.last) {
            if (isRead(p)) {
                int var = var(p);
                if (r == var) {
                    LdcInsnNode nLdc = (LdcInsnNode) node.clone(null);
                    AbstractInsnNode q = p.getNext();
                    insnList.remove(p);
                    insnList.insertBefore(q, nLdc);
                    p = q;
                    continue;
                }
            } else if (isWrite(p)) {
                int var = var(p);
                if (r == var) {
                    break;
                }
            }
            p = p.getNext();
        }
    } else {
        return false;
    }
    boolean remove = true;
    if (!block.out.containsKey(r)) {
        for (Block subBlockId : block.tos) {
            boolean x = doOptmizeFirstBlockLdc(node, r, subBlockId, couldReplaceBlockIds, replacedBlockIds);
            if (!x) {
                remove = false;
            }
        }
    }
    return remove;
}

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From source file:pxb.android.dex2jar.optimize.B.java

License:Apache License

/**
 * @param block// www  .  j a v  a2 s. com
 */
private void OptmizeFirstBlockLdc() {
    Block block = this.blocks.get(0);
    Map<Integer, LdcInsnNode> map = new HashMap<Integer, LdcInsnNode>();
    AbstractInsnNode p = block.first.getNext();
    while (p != null && p != block.last) {
        if (p.getOpcode() == Opcodes.LDC) {
            AbstractInsnNode q = p.getNext();
            if (isWrite(q)) {
                int var = var(q);
                if (block.out.get(var) == q) {
                    Map<Block, Boolean> couldReplace = new HashMap<Block, Boolean>();
                    Set<Block> replacedBlock = new HashSet<Block>();
                    replacedBlock.add(block);
                    couldReplace.put(block, true);
                    LdcInsnNode ldc = (LdcInsnNode) p;
                    boolean remove = true;
                    for (Block subBlock : block.tos) {
                        boolean x = doOptmizeFirstBlockLdc(ldc, var, subBlock, couldReplace, replacedBlock);
                        if (!x) {
                            remove = false;
                        }
                    }
                    if (remove) {
                        insnList.remove(p);
                        p = q.getNext();
                        insnList.remove(q);
                        map.put(var, ldc);
                        continue;
                    }

                }
            }
        } else if (isRead(p)) {
            int var = var(p);
            LdcInsnNode ldc = map.get(var);
            if (ldc != null) {
                AbstractInsnNode q = p.getNext();
                insnList.remove(p);
                insnList.insertBefore(q, ldc.clone(null));
                p = q;
                continue;
            }
        }
        p = p.getNext();
    }
}

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