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

Example 16 with RopMethod

use of com.android.dx.rop.code.RopMethod in project J2ME-Loader by nikita36078.

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 static 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(rmeth, paramWidth, isStatic);
    runSsaFormSteps(ssaMeth, steps);
    RopMethod resultMeth = SsaToRop.convertToRopMethod(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 17 with RopMethod

use of com.android.dx.rop.code.RopMethod in project J2ME-Loader by nikita36078.

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 static RopMethod optimizeMinimizeRegisters(RopMethod rmeth, int paramWidth, boolean isStatic, EnumSet<OptionalStep> steps) {
    SsaMethod ssaMeth;
    RopMethod resultMeth;
    ssaMeth = SsaConverter.convertToSsaMethod(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(ssaMeth, true);
    return resultMeth;
}