Examples with RopMethod com.taobao.android.dx.rop.code.RopMethod used on opensource projects

Example 6 with RopMethod

use of com.taobao.android.dx.rop.code.RopMethod in project atlas by alibaba.

the class Optimizer method optimizeMinimizeRegisters.

/**
     * Runs the optimizer with a strategy to minimize the number of rop-form
     * registers used by the end result. Dex bytecode does not have instruction
     * forms that take register numbers larger than 15 for all instructions.
     * If we've produced a method that uses more than 16 registers, try again
     * with a different strategy to see if we can get under the bar. The end
     * result will be much more efficient.
     *
     * @param rmeth method to process
     * @param paramWidth the total width, in register-units, of this method's
     * parameters
     * @param isStatic true if this method has no 'this' pointer argument.
     * @param steps set of optional optimization steps to run
     * @return optimized method
     */
private RopMethod optimizeMinimizeRegisters(RopMethod rmeth, int paramWidth, boolean isStatic, EnumSet<OptionalStep> steps) {
    SsaMethod ssaMeth;
    RopMethod resultMeth;
    ssaMeth = SsaConverter.convertToSsaMethod(this, rmeth, paramWidth, isStatic);
    EnumSet<OptionalStep> newSteps = steps.clone();
    /*
         * CONST_COLLECTOR trades insns for registers, which is not an
         * appropriate strategy here.
         */
    newSteps.remove(OptionalStep.CONST_COLLECTOR);
    runSsaFormSteps(ssaMeth, newSteps);
    resultMeth = SsaToRop.convertToRopMethod(this, ssaMeth, true);
    return resultMeth;
}

Example 7 with RopMethod

use of com.taobao.android.dx.rop.code.RopMethod in project atlas by alibaba.

the class Optimizer method optimize.

/**
     * Runs optimization algorthims over this method, and returns a new
     * instance of RopMethod with the changes.
     *
     * @param rmeth method to process
     * @param paramWidth the total width, in register-units, of this method's
     * parameters
     * @param isStatic true if this method has no 'this' pointer argument.
     * @param inPreserveLocals true if local variable info should be preserved,
     * at the cost of some registers and insns
     * @param inAdvice {@code non-null;} translation advice
     * @param steps set of optional optimization steps to run
     * @return optimized method
     */
public RopMethod optimize(RopMethod rmeth, int paramWidth, boolean isStatic, boolean inPreserveLocals, TranslationAdvice inAdvice, EnumSet<OptionalStep> steps) {
    SsaMethod ssaMeth = null;
    preserveLocals = inPreserveLocals;
    advice = inAdvice;
    ssaMeth = SsaConverter.convertToSsaMethod(this, rmeth, paramWidth, isStatic);
    runSsaFormSteps(ssaMeth, steps);
    RopMethod resultMeth = SsaToRop.convertToRopMethod(this, ssaMeth, false);
    if (resultMeth.getBlocks().getRegCount() > advice.getMaxOptimalRegisterCount()) {
        // Try to see if we can squeeze it under the register count bar
        resultMeth = optimizeMinimizeRegisters(rmeth, paramWidth, isStatic, steps);
    }
    return resultMeth;
}

Example 8 with RopMethod

use of com.taobao.android.dx.rop.code.RopMethod in project atlas by alibaba.

the class SsaToRop method convert.

/**
     * Performs the conversion.
     *
     * @return {@code non-null;} rop-form output
     */
private RopMethod convert() {
    if (DEBUG) {
        interference.dumpToStdout();
    }
    // These are other allocators for debugging or historical comparison:
    // allocator = new NullRegisterAllocator(ssaMeth, interference);
    // allocator = new FirstFitAllocator(ssaMeth, interference);
    RegisterAllocator allocator = new FirstFitLocalCombiningAllocator(optimizer, ssaMeth, interference, minimizeRegisters);
    RegisterMapper mapper = allocator.allocateRegisters();
    if (DEBUG) {
        System.out.println("Printing reg map");
        System.out.println(((BasicRegisterMapper) mapper).toHuman());
    }
    ssaMeth.setBackMode();
    ssaMeth.mapRegisters(mapper);
    removePhiFunctions();
    if (allocator.wantsParamsMovedHigh()) {
        moveParametersToHighRegisters();
    }
    removeEmptyGotos();
    RopMethod ropMethod = new RopMethod(convertBasicBlocks(), ssaMeth.blockIndexToRopLabel(ssaMeth.getEntryBlockIndex()));
    ropMethod = new IdenticalBlockCombiner(ropMethod).process();
    return ropMethod;
}

Example 9 with RopMethod

use of com.taobao.android.dx.rop.code.RopMethod in project atlas by alibaba.

the class Ropper method getRopMethod.

/**
     * Extracts the resulting {@link RopMethod} from the instance.
     *
     * @return {@code non-null;} the method object
     */
private RopMethod getRopMethod() {
    // Construct the final list of blocks.
    int sz = result.size();
    BasicBlockList bbl = new BasicBlockList(sz);
    for (int i = 0; i < sz; i++) {
        bbl.set(i, result.get(i));
    }
    bbl.setImmutable();
    /*
         * Note: The parameter assignment block is always the first
         * that should be executed, hence the second argument to the
         * constructor.
         */
    return new RopMethod(bbl, getSpecialLabel(PARAM_ASSIGNMENT));
}

Example 10 with RopMethod

use of com.taobao.android.dx.rop.code.RopMethod in project atlas by alibaba.

the class OptimizerOptions method compareOptimizerStep.

/**
     * Compares the output of the optimizer run normally with a run skipping
     * some optional steps. Results are printed to stderr.
     *
     * @param nonOptRmeth {@code non-null;} origional rop method
     * @param paramSize {@code >= 0;} parameter size of method
     * @param isStatic true if this method has no 'this' pointer argument.
     * @param args {@code non-null;} translator arguments
     * @param advice {@code non-null;} translation advice
     * @param rmeth {@code non-null;} method with all optimization steps run.
     */
public static void compareOptimizerStep(RopMethod nonOptRmeth, int paramSize, boolean isStatic, CfOptions args, TranslationAdvice advice, RopMethod rmeth) {
    EnumSet<Optimizer.OptionalStep> steps;
    steps = EnumSet.allOf(Optimizer.OptionalStep.class);
    // This is the step to skip.
    steps.remove(Optimizer.OptionalStep.CONST_COLLECTOR);
    RopMethod skipRopMethod = new Optimizer().optimize(nonOptRmeth, paramSize, isStatic, args.localInfo, advice, steps);
    int normalInsns = rmeth.getBlocks().getEffectiveInstructionCount();
    int skipInsns = skipRopMethod.getBlocks().getEffectiveInstructionCount();
    System.err.printf("optimize step regs:(%d/%d/%.2f%%)" + " insns:(%d/%d/%.2f%%)\n", rmeth.getBlocks().getRegCount(), skipRopMethod.getBlocks().getRegCount(), 100.0 * ((skipRopMethod.getBlocks().getRegCount() - rmeth.getBlocks().getRegCount()) / (float) skipRopMethod.getBlocks().getRegCount()), normalInsns, skipInsns, 100.0 * ((skipInsns - normalInsns) / (float) skipInsns));
}