Examples with PhiInsn jadx.core.dex.instructions.PhiInsn used on opensource projects

Example 11 with PhiInsn

use of jadx.core.dex.instructions.PhiInsn in project jadx by skylot.

the class RegisterArg method getPhiAssignInsn.

public InsnNode getPhiAssignInsn() {
    PhiInsn usePhi = sVar.getUsedInPhi();
    if (usePhi != null) {
        return usePhi;
    }
    InsnNode parent = sVar.getAssign().getParentInsn();
    if (parent != null && parent.getType() == InsnType.PHI) {
        return parent;
    }
    return null;
}

Example 12 with PhiInsn

use of jadx.core.dex.instructions.PhiInsn in project jadx by skylot.

the class PhiListAttr method toString.

@Override
public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("PHI: ");
    for (PhiInsn phiInsn : list) {
        sb.append('r').append(phiInsn.getResult().getRegNum()).append(" ");
    }
    return sb.toString();
}

Example 13 with PhiInsn

use of jadx.core.dex.instructions.PhiInsn in project jadx by skylot.

the class TypeInference method visit.

@Override
public void visit(MethodNode mth) throws JadxException {
    if (mth.isNoCode()) {
        return;
    }
    DexNode dex = mth.dex();
    for (SSAVar var : mth.getSVars()) {
        // inference variable type
        ArgType type = processType(dex, var);
        if (type == null) {
            type = ArgType.UNKNOWN;
        }
        var.setType(type);
        // search variable name
        String name = processVarName(var);
        var.setName(name);
    }
    // fix type for vars used only in Phi nodes
    for (SSAVar sVar : mth.getSVars()) {
        PhiInsn phi = sVar.getUsedInPhi();
        if (phi != null) {
            processPhiNode(phi);
        }
    }
}

Example 14 with PhiInsn

use of jadx.core.dex.instructions.PhiInsn in project jadx by skylot.

the class EliminatePhiNodes method replaceMerge.

/**
	 * Replace 'MERGE' with 'PHI' insn.
	 */
private void replaceMerge(MethodNode mth, BlockNode block, InsnNode insn) {
    if (insn.getArgsCount() != 2) {
        throw new JadxRuntimeException("Unexpected count of arguments in merge insn: " + insn);
    }
    RegisterArg oldArg = (RegisterArg) insn.getArg(1);
    RegisterArg newArg = (RegisterArg) insn.getArg(0);
    int newRegNum = newArg.getRegNum();
    if (oldArg.getRegNum() == newRegNum) {
        throw new JadxRuntimeException("Unexpected register number in merge insn: " + insn);
    }
    SSAVar oldSVar = oldArg.getSVar();
    RegisterArg assignArg = oldSVar.getAssign();
    InsnNode assignParentInsn = assignArg.getParentInsn();
    BlockNode assignBlock = BlockUtils.getBlockByInsn(mth, assignParentInsn);
    if (assignBlock == null) {
        throw new JadxRuntimeException("Unknown assign block for " + assignParentInsn);
    }
    BlockNode assignPred = null;
    for (BlockNode pred : block.getPredecessors()) {
        if (BlockUtils.isPathExists(assignBlock, pred)) {
            assignPred = pred;
            break;
        }
    }
    if (assignPred == null) {
        throw new JadxRuntimeException("Assign predecessor not found for " + assignBlock + " from " + block);
    }
    // all checks passed
    RegisterArg newAssignArg = oldArg.duplicate(newRegNum, null);
    SSAVar newSVar = mth.makeNewSVar(newRegNum, mth.getNextSVarVersion(newRegNum), newAssignArg);
    newSVar.setName(oldSVar.getName());
    newSVar.setType(assignArg.getType());
    if (assignParentInsn != null) {
        assignParentInsn.setResult(newAssignArg);
    }
    for (RegisterArg useArg : oldSVar.getUseList()) {
        RegisterArg newUseArg = useArg.duplicate(newRegNum, newSVar);
        InsnNode parentInsn = useArg.getParentInsn();
        if (parentInsn != null) {
            newSVar.use(newUseArg);
            parentInsn.replaceArg(useArg, newUseArg);
        }
    }
    block.getInstructions().remove(0);
    PhiInsn phiInsn = SSATransform.addPhi(mth, block, newRegNum);
    phiInsn.setResult(insn.getResult());
    phiInsn.bindArg(newAssignArg.duplicate(), assignPred);
    phiInsn.bindArg(newArg.duplicate(), BlockUtils.selectOtherSafe(assignPred, block.getPredecessors()));
}

Example 15 with PhiInsn

use of jadx.core.dex.instructions.PhiInsn in project jadx by skylot.

the class SSATransform method initPhiInEnterBlock.

private static void initPhiInEnterBlock(SSAVar[] vars, BlockNode enterBlock) {
    PhiListAttr phiList = enterBlock.get(AType.PHI_LIST);
    if (phiList != null) {
        for (PhiInsn phiInsn : phiList.getList()) {
            int regNum = phiInsn.getResult().getRegNum();
            SSAVar var = vars[regNum];
            if (var == null) {
                continue;
            }
            RegisterArg arg = phiInsn.bindArg(enterBlock);
            var.use(arg);
            var.setUsedInPhi(phiInsn);
        }
    }
}