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

Example 6 with LocalItem

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

the class PhiTypeResolver method resolveResultType.

/**
     * Resolves the result of a phi insn based on its operands. The "void"
     * type, which is a nonsensical type for a register, is used for
     * registers defined by as-of-yet-unresolved phi operations.
     *
     * @return true if the result type changed, false if no change
     */
boolean resolveResultType(PhiInsn insn) {
    insn.updateSourcesToDefinitions(ssaMeth);
    RegisterSpecList sources = insn.getSources();
    // Start by finding the first non-void operand
    RegisterSpec first = null;
    int firstIndex = -1;
    int szSources = sources.size();
    for (int i = 0; i < szSources; i++) {
        RegisterSpec rs = sources.get(i);
        if (rs.getBasicType() != Type.BT_VOID) {
            first = rs;
            firstIndex = i;
        }
    }
    if (first == null) {
        // All operands are void -- we're not ready to resolve yet
        return false;
    }
    LocalItem firstLocal = first.getLocalItem();
    Type mergedType = first.getType();
    boolean sameLocals = true;
    for (int i = 0; i < szSources; i++) {
        if (i == firstIndex) {
            continue;
        }
        RegisterSpec rs = sources.get(i);
        // Just skip void (unresolved phi results) for now
        if (rs.getBasicType() == Type.BT_VOID) {
            continue;
        }
        sameLocals = sameLocals && equalsHandlesNulls(firstLocal, rs.getLocalItem());
        mergedType = (Type) Merger.mergeType(mergedType, rs.getType());
    }
    Type newResultType;
    if (mergedType != null) {
        newResultType = mergedType;
    } else {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < szSources; i++) {
            sb.append(sources.get(i).toString());
            sb.append(' ');
        }
        throw new RuntimeException("Couldn't map types in phi insn:" + sb);
    }
    LocalItem newLocal = sameLocals ? firstLocal : null;
    RegisterSpec result = insn.getResult();
    if ((result.getTypeBearer() == newResultType) && equalsHandlesNulls(newLocal, result.getLocalItem())) {
        return false;
    }
    insn.changeResultType(newResultType, newLocal);
    return true;
}

Example 7 with LocalItem

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

the class OutputFinisher method addConstants.

/**
     * Helper for {@link #getAllConstants} which adds all the info for
     * a single {@code RegisterSpec}.
     *
     * @param result {@code non-null;} result set to add to
     * @param spec {@code null-ok;} register spec to add
     */
private static void addConstants(HashSet<Constant> result, RegisterSpec spec) {
    if (spec == null) {
        return;
    }
    LocalItem local = spec.getLocalItem();
    CstString name = local.getName();
    CstString signature = local.getSignature();
    Type type = spec.getType();
    if (type != Type.KNOWN_NULL) {
        result.add(CstType.intern(type));
    }
    if (name != null) {
        result.add(name);
    }
    if (signature != null) {
        result.add(signature);
    }
}