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

Example 36 with BasicBlock

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

the class IdenticalBlockCombiner method combineBlocks.

/**
 * Combines blocks proven identical into one alpha block, re-writing
 * all of the successor links that point to the beta blocks to point
 * to the alpha block instead.
 *
 * @param alphaLabel block that will replace all the beta block
 * @param betaLabels label list of blocks to combine
 */
private void combineBlocks(int alphaLabel, IntList betaLabels) {
    int szBetas = betaLabels.size();
    for (int i = 0; i < szBetas; i++) {
        int betaLabel = betaLabels.get(i);
        BasicBlock bb = blocks.labelToBlock(betaLabel);
        IntList preds = ropMethod.labelToPredecessors(bb.getLabel());
        int szPreds = preds.size();
        for (int j = 0; j < szPreds; j++) {
            BasicBlock predBlock = newBlocks.labelToBlock(preds.get(j));
            replaceSucc(predBlock, betaLabel, alphaLabel);
        }
    }
}

Example 37 with BasicBlock

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

the class IdenticalBlockCombiner method replaceSucc.

/**
 * Replaces one of a block's successors with a different label. Constructs
 * an updated BasicBlock instance and places it in {@code newBlocks}.
 *
 * @param block block to replace
 * @param oldLabel label of successor to replace
 * @param newLabel label of new successor
 */
private void replaceSucc(BasicBlock block, int oldLabel, int newLabel) {
    IntList newSuccessors = block.getSuccessors().mutableCopy();
    int newPrimarySuccessor;
    newSuccessors.set(newSuccessors.indexOf(oldLabel), newLabel);
    newPrimarySuccessor = block.getPrimarySuccessor();
    if (newPrimarySuccessor == oldLabel) {
        newPrimarySuccessor = newLabel;
    }
    newSuccessors.setImmutable();
    BasicBlock newBB = new BasicBlock(block.getLabel(), block.getInsns(), newSuccessors, newPrimarySuccessor);
    newBlocks.set(newBlocks.indexOfLabel(block.getLabel()), newBB);
}

Example 38 with BasicBlock

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

the class SsaToRop method convertBasicBlock.

/**
 * Converts a single basic block to rop form.
 *
 * @param block SSA block to process
 * @return {@code non-null;} ROP block
 */
private BasicBlock convertBasicBlock(SsaBasicBlock block) {
    IntList successorList = block.getRopLabelSuccessorList();
    int primarySuccessorLabel = block.getPrimarySuccessorRopLabel();
    // Filter out any reference to the SSA form's exit block.
    // Exit block may be null.
    SsaBasicBlock exitBlock = ssaMeth.getExitBlock();
    int exitRopLabel = (exitBlock == null) ? -1 : exitBlock.getRopLabel();
    if (successorList.contains(exitRopLabel)) {
        if (successorList.size() > 1) {
            throw new RuntimeException("Exit predecessor must have no other successors" + Hex.u2(block.getRopLabel()));
        } else {
            successorList = IntList.EMPTY;
            primarySuccessorLabel = -1;
            verifyValidExitPredecessor(block);
        }
    }
    successorList.setImmutable();
    BasicBlock result = new BasicBlock(block.getRopLabel(), convertInsns(block.getInsns()), successorList, primarySuccessorLabel);
    return result;
}