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

Example 36 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class DeadCodeRemover method run.

/**
     * Runs the dead code remover.
     */
private void run() {
    pruneDeadInstructions();
    HashSet<SsaInsn> deletedInsns = new HashSet<SsaInsn>();
    ssaMeth.forEachInsn(new NoSideEffectVisitor(worklist));
    int regV;
    while (0 <= (regV = worklist.nextSetBit(0))) {
        worklist.clear(regV);
        if (useList[regV].size() == 0 || isCircularNoSideEffect(regV, null)) {
            SsaInsn insnS = ssaMeth.getDefinitionForRegister(regV);
            // This insn has already been deleted.
            if (deletedInsns.contains(insnS)) {
                continue;
            }
            RegisterSpecList sources = insnS.getSources();
            int sz = sources.size();
            for (int i = 0; i < sz; i++) {
                // Delete this insn from all usage lists.
                RegisterSpec source = sources.get(i);
                useList[source.getReg()].remove(insnS);
                if (!hasSideEffect(ssaMeth.getDefinitionForRegister(source.getReg()))) {
                    /*
                         * Only registers whose definition has no side effect
                         * should be added back to the worklist.
                         */
                    worklist.set(source.getReg());
                }
            }
            // Schedule this insn for later deletion.
            deletedInsns.add(insnS);
        }
    }
    ssaMeth.deleteInsns(deletedInsns);
}

Example 37 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class DeadCodeRemover method pruneDeadInstructions.

/**
     * Removes all instructions from every unreachable block.
     */
private void pruneDeadInstructions() {
    HashSet<SsaInsn> deletedInsns = new HashSet<SsaInsn>();
    ssaMeth.computeReachability();
    for (SsaBasicBlock block : ssaMeth.getBlocks()) {
        if (block.isReachable())
            continue;
        // Prune instructions from unreachable blocks
        for (int i = 0; i < block.getInsns().size(); i++) {
            SsaInsn insn = block.getInsns().get(i);
            RegisterSpecList sources = insn.getSources();
            int sourcesSize = sources.size();
            // Delete this instruction completely if it has sources
            if (sourcesSize != 0) {
                deletedInsns.add(insn);
            }
            // Delete this instruction from all usage lists.
            for (int j = 0; j < sourcesSize; j++) {
                RegisterSpec source = sources.get(j);
                useList[source.getReg()].remove(insn);
            }
            // Remove this instruction result from the sources of any phis
            RegisterSpec result = insn.getResult();
            if (result == null)
                continue;
            for (SsaInsn use : useList[result.getReg()]) {
                if (use instanceof PhiInsn) {
                    PhiInsn phiUse = (PhiInsn) use;
                    phiUse.removePhiRegister(result);
                }
            }
        }
    }
    ssaMeth.deleteInsns(deletedInsns);
}

Example 38 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class NormalSsaInsn method changeOneSource.

/**
     * Changes one of the insn's sources. New source should be of same type
     * and category.
     *
     * @param index {@code >=0;} index of source to change
     * @param newSpec spec for new source
     */
public final void changeOneSource(int index, RegisterSpec newSpec) {
    RegisterSpecList origSources = insn.getSources();
    int sz = origSources.size();
    RegisterSpecList newSources = new RegisterSpecList(sz);
    for (int i = 0; i < sz; i++) {
        newSources.set(i, i == index ? newSpec : origSources.get(i));
    }
    newSources.setImmutable();
    RegisterSpec origSpec = origSources.get(index);
    if (origSpec.getReg() != newSpec.getReg()) {
        /*
             * If the register remains unchanged, we're only changing
             * the type or local var name so don't update use list
             */
        getBlock().getParent().onSourceChanged(this, origSpec, newSpec);
    }
    insn = insn.withNewRegisters(getResult(), newSources);
}

Example 39 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class PhiInsn method toHumanWithInline.

/**
     * Returns human-readable string for listing dumps. This method
     * allows sub-classes to specify extra text.
     *
     * @param extra {@code null-ok;} the argument to print after the opcode
     * @return human-readable string for listing dumps
     */
protected final String toHumanWithInline(String extra) {
    StringBuffer sb = new StringBuffer(80);
    sb.append(SourcePosition.NO_INFO);
    sb.append(": phi");
    if (extra != null) {
        sb.append("(");
        sb.append(extra);
        sb.append(")");
    }
    RegisterSpec result = getResult();
    if (result == null) {
        sb.append(" .");
    } else {
        sb.append(" ");
        sb.append(result.toHuman());
    }
    sb.append(" <-");
    int sz = getSources().size();
    if (sz == 0) {
        sb.append(" .");
    } else {
        for (int i = 0; i < sz; i++) {
            sb.append(" ");
            sb.append(sources.get(i).toHuman() + "[b=" + Hex.u2(operands.get(i).ropLabel) + "]");
        }
    }
    return sb.toString();
}

Example 40 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class PhiInsn method mapSourceRegisters.

/** {@inheritDoc} */
@Override
public final void mapSourceRegisters(RegisterMapper mapper) {
    for (Operand o : operands) {
        RegisterSpec old = o.regSpec;
        o.regSpec = mapper.map(old);
        if (old != o.regSpec) {
            getBlock().getParent().onSourceChanged(this, old, o.regSpec);
        }
    }
    sources = null;
}