Examples of org.apache.bcel.generic.Instruction.consumeStack()

Class org.apache.bcel.generic.Instruction

Examples of org.apache.bcel.generic.Instruction.consumeStack()

org.apache.bcel.generic.Instruction.consumeStack()
This method also gives right results for instructions whose effect on the stack depends on the constant pool entry they reference. @return Number of words consumed from stack by this instruction,or Constants.UNPREDICTABLE, if this can not be computed statically

                    InstructionHandle lastLogHandle = handle;
                    logger.info(
                        "Found a ReturnInstruction of type: "
                            + inst.toString());
                    int stackSize =
                        inst.consumeStack(cp) - inst.produceStack(cp);
                    while (stackSize != 0) {
                        handle = handle.getPrev();
                        inst = handle.getInstruction();
                        logger.info("prev instruction: " + inst);
                        stackSize += inst.consumeStack(cp)

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                        inst.consumeStack(cp) - inst.produceStack(cp);
                    while (stackSize != 0) {
                        handle = handle.getPrev();
                        inst = handle.getInstruction();
                        logger.info("prev instruction: " + inst);
                        stackSize += inst.consumeStack(cp)
                            - inst.produceStack(cp);
                    }


                    InstructionHandle insertHandle =
                        insertExit(mg, il, handle, cp);

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    @Override
    public void transferInstruction(InstructionHandle handle, BasicBlock basicBlock, StackDepth fact)
            throws DataflowAnalysisException {
        Instruction ins = handle.getInstruction();
        int produced = ins.produceStack(cpg);
        int consumed = ins.consumeStack(cpg);
        if (produced == Constants.UNPREDICTABLE || consumed == Constants.UNPREDICTABLE) {
            throw new IllegalStateException("Unpredictable stack delta for instruction: " + handle);
        }
        int depth = fact.getDepth();
        depth += (produced - consumed);

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            if (!frame.isValid()) {
                continue;
            }


            // Find the ValueNumber of the receiver object
            int numConsumed = ins.consumeStack(cpg);
            MethodGen methodGen = classContext.getMethodGen(method);
            assert methodGen != null;
            if (numConsumed == Constants.UNPREDICTABLE) {
                throw new DataflowAnalysisException("Unpredictable stack consumption", methodGen, handle);
            }

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        InstructionHandle handle = loc.getHandle();
        Instruction ins = handle.getInstruction();
        boolean isTest = false;


        ConstantPoolGen cpg = cfg.getMethodGen().getConstantPool();
        if (ins instanceof IfInstruction && ins.consumeStack(cpg) == 2) {
            isTest = true;
        }  else if (ins instanceof InvokeInstruction && ins.consumeStack(cpg) == 2) {
            InvokeInstruction invoke = (InvokeInstruction) ins;
            isTest = invoke.getMethodName(cpg).equals("equals") &&invoke.getSignature(cpg).equals("(Ljava/lang/Object;)Z") ;
        }

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        boolean isTest = false;


        ConstantPoolGen cpg = cfg.getMethodGen().getConstantPool();
        if (ins instanceof IfInstruction && ins.consumeStack(cpg) == 2) {
            isTest = true;
        }  else if (ins instanceof InvokeInstruction && ins.consumeStack(cpg) == 2) {
            InvokeInstruction invoke = (InvokeInstruction) ins;
            isTest = invoke.getMethodName(cpg).equals("equals") &&invoke.getSignature(cpg).equals("(Ljava/lang/Object;)Z") ;
        }
        if (isTest) {
            ValueNumber top = factAtLocation.getStackValue(0);

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