Examples with SsaInsn com.taobao.android.dx.ssa.SsaInsn used on opensource projects

Example 1 with SsaInsn

use of com.taobao.android.dx.ssa.SsaInsn in project atlas by alibaba.

the class SsaDumper method endParsingMember.

/**
 * {@inheritDoc}
 */
@Override
public void endParsingMember(ByteArray bytes, int offset, String name, String descriptor, Member member) {
    if (!(member instanceof Method)) {
        return;
    }
    if (!shouldDumpMethod(name)) {
        return;
    }
    if ((member.getAccessFlags() & (AccessFlags.ACC_ABSTRACT | AccessFlags.ACC_NATIVE)) != 0) {
        return;
    }
    ConcreteMethod meth = new ConcreteMethod((Method) member, classFile, true, true);
    TranslationAdvice advice = DexTranslationAdvice.THE_ONE;
    RopMethod rmeth = Ropper.convert(meth, advice, classFile.getMethods());
    SsaMethod ssaMeth = null;
    boolean isStatic = AccessFlags.isStatic(meth.getAccessFlags());
    int paramWidth = computeParamWidth(meth, isStatic);
    if (args.ssaStep == null) {
        ssaMeth = Optimizer.debugNoRegisterAllocation(rmeth, paramWidth, isStatic, true, advice, EnumSet.allOf(Optimizer.OptionalStep.class));
    } else if ("edge-split".equals(args.ssaStep)) {
        ssaMeth = Optimizer.debugEdgeSplit(rmeth, paramWidth, isStatic, true, advice);
    } else if ("phi-placement".equals(args.ssaStep)) {
        ssaMeth = Optimizer.debugPhiPlacement(rmeth, paramWidth, isStatic, true, advice);
    } else if ("renaming".equals(args.ssaStep)) {
        ssaMeth = Optimizer.debugRenaming(rmeth, paramWidth, isStatic, true, advice);
    } else if ("dead-code".equals(args.ssaStep)) {
        ssaMeth = Optimizer.debugDeadCodeRemover(rmeth, paramWidth, isStatic, true, advice);
    }
    StringBuffer sb = new StringBuffer(2000);
    sb.append("first ");
    sb.append(Hex.u2(ssaMeth.blockIndexToRopLabel(ssaMeth.getEntryBlockIndex())));
    sb.append('\n');
    ArrayList<SsaBasicBlock> blocks = ssaMeth.getBlocks();
    ArrayList<SsaBasicBlock> sortedBlocks = (ArrayList<SsaBasicBlock>) blocks.clone();
    Collections.sort(sortedBlocks, SsaBasicBlock.LABEL_COMPARATOR);
    for (SsaBasicBlock block : sortedBlocks) {
        sb.append("block ").append(Hex.u2(block.getRopLabel())).append('\n');
        BitSet preds = block.getPredecessors();
        for (int i = preds.nextSetBit(0); i >= 0; i = preds.nextSetBit(i + 1)) {
            sb.append("  pred ");
            sb.append(Hex.u2(ssaMeth.blockIndexToRopLabel(i)));
            sb.append('\n');
        }
        sb.append("  live in:" + block.getLiveInRegs());
        sb.append("\n");
        for (SsaInsn insn : block.getInsns()) {
            sb.append("  ");
            sb.append(insn.toHuman());
            sb.append('\n');
        }
        if (block.getSuccessors().cardinality() == 0) {
            sb.append("  returns\n");
        } else {
            int primary = block.getPrimarySuccessorRopLabel();
            IntList succLabelList = block.getRopLabelSuccessorList();
            int szSuccLabels = succLabelList.size();
            for (int i = 0; i < szSuccLabels; i++) {
                sb.append("  next ");
                sb.append(Hex.u2(succLabelList.get(i)));
                if (szSuccLabels != 1 && primary == succLabelList.get(i)) {
                    sb.append(" *");
                }
                sb.append('\n');
            }
        }
        sb.append("  live out:" + block.getLiveOutRegs());
        sb.append("\n");
    }
    suppressDump = false;
    setAt(bytes, 0);
    parsed(bytes, 0, bytes.size(), sb.toString());
    suppressDump = true;
}

Example 2 with SsaInsn

use of com.taobao.android.dx.ssa.SsaInsn in project atlas by alibaba.

the class FirstFitLocalCombiningAllocator method getParameterIndexForReg.

/**
 * Gets the parameter index for SSA registers that are method parameters.
 * {@code -1} is returned for non-parameter registers.
 *
 * @param ssaReg {@code >=0;} SSA register to look up
 * @return parameter index or {@code -1} if not a parameter
 */
private int getParameterIndexForReg(int ssaReg) {
    SsaInsn defInsn = ssaMeth.getDefinitionForRegister(ssaReg);
    if (defInsn == null) {
        return -1;
    }
    Rop opcode = defInsn.getOpcode();
    // opcode == null for phi insns.
    if (opcode != null && opcode.getOpcode() == RegOps.MOVE_PARAM) {
        CstInsn origInsn = (CstInsn) defInsn.getOriginalRopInsn();
        return ((CstInteger) origInsn.getConstant()).getValue();
    }
    return -1;
}

Example 3 with SsaInsn

use of com.taobao.android.dx.ssa.SsaInsn in project atlas by alibaba.

the class LivenessAnalyzer method coInterferePhis.

/**
 * Ensures that all the phi result registers for all the phis in the
 * same basic block interfere with each other. This is needed since
 * the dead code remover has allowed through "dead-end phis" whose
 * results are not used except as local assignments. Without this step,
 * a the result of a dead-end phi might be assigned the same register
 * as the result of another phi, and the phi removal move scheduler may
 * generate moves that over-write the live result.
 *
 * @param ssaMeth {@code non-null;} method to pricess
 * @param interference {@code non-null;} interference graph
 */
private static void coInterferePhis(SsaMethod ssaMeth, InterferenceGraph interference) {
    for (SsaBasicBlock b : ssaMeth.getBlocks()) {
        List<SsaInsn> phis = b.getPhiInsns();
        int szPhis = phis.size();
        for (int i = 0; i < szPhis; i++) {
            for (int j = 0; j < szPhis; j++) {
                if (i == j) {
                    continue;
                }
                interference.add(phis.get(i).getResult().getReg(), phis.get(j).getResult().getReg());
            }
        }
    }
}

Example 4 with SsaInsn

use of com.taobao.android.dx.ssa.SsaInsn in project atlas by alibaba.

the class LivenessAnalyzer method run.

/**
 * From Appel algorithm 19.17.
 */
public void run() {
    List<SsaInsn> useList = ssaMeth.getUseListForRegister(regV);
    for (SsaInsn insn : useList) {
        nextFunction = NextFunction.DONE;
        if (insn instanceof PhiInsn) {
            // If s is a phi-function with V as it's ith argument.
            PhiInsn phi = (PhiInsn) insn;
            for (SsaBasicBlock pred : phi.predBlocksForReg(regV, ssaMeth)) {
                blockN = pred;
                nextFunction = NextFunction.LIVE_OUT_AT_BLOCK;
                handleTailRecursion();
            }
        } else {
            blockN = insn.getBlock();
            statementIndex = blockN.getInsns().indexOf(insn);
            if (statementIndex < 0) {
                throw new RuntimeException("insn not found in it's own block");
            }
            nextFunction = NextFunction.LIVE_IN_AT_STATEMENT;
            handleTailRecursion();
        }
    }
    int nextLiveOutBlock;
    while ((nextLiveOutBlock = liveOutBlocks.nextSetBit(0)) >= 0) {
        blockN = ssaMeth.getBlocks().get(nextLiveOutBlock);
        liveOutBlocks.clear(nextLiveOutBlock);
        nextFunction = NextFunction.LIVE_OUT_AT_BLOCK;
        handleTailRecursion();
    }
}

Example 5 with SsaInsn

use of com.taobao.android.dx.ssa.SsaInsn in project atlas by alibaba.

the class SsaToRop method verifyValidExitPredecessor.

/**
 * Validates that a basic block is a valid end predecessor. It must
 * end in a RETURN or a THROW. Throws a runtime exception on error.
 *
 * @param b {@code non-null;} block to validate
 * @throws RuntimeException on error
 */
private void verifyValidExitPredecessor(SsaBasicBlock b) {
    ArrayList<SsaInsn> insns = b.getInsns();
    SsaInsn lastInsn = insns.get(insns.size() - 1);
    Rop opcode = lastInsn.getOpcode();
    if (opcode.getBranchingness() != Rop.BRANCH_RETURN && opcode != Rops.THROW) {
        throw new RuntimeException("Exit predecessor must end" + " in valid exit statement.");
    }
}