Java JumpInsnNode.getOpcode方法代碼示例

import org.objectweb.asm.tree.JumpInsnNode; //導入方法依賴的package包/類
private int[] getJumpTargets(JumpInsnNode jump) {
  switch (jump.getOpcode()) {
    case Opcodes.IFEQ:
    case Opcodes.IFNE:
    case Opcodes.IFLT:
    case Opcodes.IFGE:
    case Opcodes.IFGT:
    case Opcodes.IFLE:
    case Opcodes.IF_ICMPEQ:
    case Opcodes.IF_ICMPNE:
    case Opcodes.IF_ICMPLT:
    case Opcodes.IF_ICMPGE:
    case Opcodes.IF_ICMPGT:
    case Opcodes.IF_ICMPLE:
    case Opcodes.IF_ACMPEQ:
    case Opcodes.IF_ACMPNE:
    case Opcodes.IFNULL:
    case Opcodes.IFNONNULL:
      return new int[]{getOffset(jump.label), getOffset(jump.getNext())};
    case Opcodes.GOTO:
      return new int[]{getOffset(jump.label)};
    case Opcodes.JSR: {
      throw new Unreachable("JSR should be handled by the ASM jsr inliner");
    }
    default:
      throw new Unreachable("Unexpected opcode in jump instruction: " + jump);
  }
}
 

import org.objectweb.asm.tree.JumpInsnNode; //導入方法依賴的package包/類
private JumpExpression makeConditionalExpression(JumpInsnNode node, ExpressionStack stack) {
	JumpExpression exp = null;

	int jumpDestination = stack.getLabelId(node.label.getLabel());
	int opCode = node.getOpcode();
	LOG.debug("jump destination L" + jumpDestination);

	if (Util.isBetween(opCode, Opcodes.IF_ICMPEQ, Opcodes.IF_ACMPNE)) {
		exp = new MultiConditional(opCode, jumpDestination, stack.pop(), stack.pop());
	} else if (Util.isBetween(opCode, Opcodes.IFEQ, Opcodes.IFLE)) {
		Expression stackTop = stack.peek();
		if (stackTop instanceof MultiConditional && !((MultiConditional) stackTop).isJumpDestinationSet()) {
			exp = (MultiConditional) stack.pop();
			exp.setJumpDestination(jumpDestination);
			exp.setOpCode(node.getOpcode());
		} else {
			exp = new SingleConditional(opCode, jumpDestination, stack.pop());
		}
	} else if (Util.isBetween(opCode, Opcodes.IFNULL, Opcodes.IFNONNULL)) {
		exp = new MultiConditional(opCode, jumpDestination, new PrimaryExpression("null", DataType.UNKNOWN), stack.pop());
	} else if (opCode == Opcodes.GOTO) {
		exp = new UnconditionalJump(opCode, jumpDestination);
	}
	if (opCode != Opcodes.GOTO && exp != null && node.getNext() != null && node.getNext() instanceof LabelNode) {
		exp.setThenBranchStart(stack.getLabelId(((LabelNode) node.getNext()).getLabel()));
	}
	return exp;
}
 

import org.objectweb.asm.tree.JumpInsnNode; //導入方法依賴的package包/類
@Override
protected AbstractInsnNode transformJumpInsnNode(MethodNode mn,
        JumpInsnNode jumpNode) {

	switch (jumpNode.getOpcode()) {
	case Opcodes.IFEQ:
	case Opcodes.IFNE:
	case Opcodes.IFLT:
	case Opcodes.IFGE:
	case Opcodes.IFGT:
	case Opcodes.IFLE:
		TransformationStatistics.insertPush(jumpNode.getOpcode());
		this.booleanTestabilityTransformation.insertPush(jumpNode.getOpcode(), jumpNode, mn.instructions);
		break;
	case Opcodes.IF_ICMPEQ:
	case Opcodes.IF_ICMPNE:
	case Opcodes.IF_ICMPLT:
	case Opcodes.IF_ICMPGE:
	case Opcodes.IF_ICMPGT:
	case Opcodes.IF_ICMPLE:
		TransformationStatistics.insertPush(jumpNode.getOpcode());
		this.booleanTestabilityTransformation.insertPush2(jumpNode.getOpcode(), jumpNode, mn.instructions);
		break;
	case Opcodes.IFNULL:
	case Opcodes.IFNONNULL:
		TransformationStatistics.insertPush(jumpNode.getOpcode());
		this.booleanTestabilityTransformation.insertPushNull(jumpNode.getOpcode(), jumpNode, mn.instructions);
		break;
	case Opcodes.IF_ACMPEQ:
	case Opcodes.IF_ACMPNE:
		TransformationStatistics.insertPush(jumpNode.getOpcode());
		this.booleanTestabilityTransformation.insertPushEquals(jumpNode.getOpcode(), jumpNode, mn.instructions);
		break;
	default:
		// GOTO, JSR: Do nothing
	}
	return jumpNode;
}
 

import org.objectweb.asm.tree.JumpInsnNode; //導入方法依賴的package包/類
/**
 * The {@link AbstractInsnNode#getOpcode()} value should be one of {@code IFEQ}, {@code IFNE},
 * {@code IFLT}, {@code IFGE}, {@code IFGT}, {@code IFLE}, {@code IFLT}, {@code IFGE},
 * {@code IFGT},{@code IF_ICMPEQ}, {@code IF_ICMPNE}, {@code IF_ICMPLT}, {@code IF_ICMPGE},
 * {@code IF_ICMPGT}, {@code IF_ICMPLE}, {@code IF_ACMPEQ}, {@code IF_ACMPNE}, {@code GOTO},
 * {@code JSR}, {@code IFNULL} or {@code IFNONNULL}.
 * 
 * 
 * @param instructionCursor the cursor for the current instruction to read
 * @param expressionStack the stack of Expressions
 * @param capturedArguments the captured arguments
 * @param localVariables the local variables
 * @return the list of statements read from the jump instruction
 */
private List<Statement> readJumpInstruction(final InsnCursor instructionCursor,
    final Stack<Expression> expressionStack, final List<CapturedArgument> capturedArguments,
    final LocalVariables localVariables) {
  final JumpInsnNode jumpInsnNode = (JumpInsnNode) instructionCursor.getCurrent();
  final LabelNode jumpLabel = jumpInsnNode.label;
  // FIXME: add support for LCMP:
  // Takes two two-word long integers off the stack and compares them. If
  // the two integers are the same, the int 0 is pushed onto the stack. If
  // value2 is greater than value1, the int 1 is pushed onto the stack. If
  // value1 is greater than value2, the int -1 is pushed onto the stack.
  switch (jumpInsnNode.getOpcode()) {
    case Opcodes.IFEQ:
    case Opcodes.IFNE:
    case Opcodes.IFLE:
    case Opcodes.IFLT:
    case Opcodes.IFGE:
    case Opcodes.IFGT:
    case Opcodes.IF_ICMPEQ:
    case Opcodes.IF_ICMPNE:
    case Opcodes.IF_ICMPLE:
    case Opcodes.IF_ICMPLT:
    case Opcodes.IF_ICMPGE:
    case Opcodes.IF_ICMPGT:
    case Opcodes.IF_ACMPEQ:
    case Opcodes.IF_ACMPNE:
      return Arrays.asList(buildControlFlowStatement(instructionCursor, expressionStack,
          capturedArguments, localVariables));
    case Opcodes.GOTO:
      final InsnCursor jumpInstructionCursor = instructionCursor.duplicate();
      jumpInstructionCursor.move(jumpLabel.getLabel());
      return readStatements(jumpInstructionCursor, expressionStack, capturedArguments,
          localVariables);
    default:
      throw new AnalyzeException("Unexpected JumpInsnNode OpCode: " + jumpInsnNode.getOpcode());
  }
}