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

Example 76 with RegisterSpec

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

the class FirstFitLocalCombiningAllocator method tryMapRegs.

/**
     * Tries to map a list of SSA registers into the a rop reg, marking
     * used rop space as reserved. SSA registers that don't fit are left
     * unmapped.
     *
     * @param specs {@code non-null;} SSA registers to attempt to map
     * @param ropReg {@code >=0;} rop register to map to
     * @param maxAllowedCategory {@code 1..2;} maximum category
     * allowed in mapping.
     * @param markReserved do so if {@code true}
     * @return {@code true} if all registers were mapped, {@code false}
     * if some remain unmapped
     */
private boolean tryMapRegs(ArrayList<RegisterSpec> specs, int ropReg, int maxAllowedCategory, boolean markReserved) {
    boolean remaining = false;
    for (RegisterSpec spec : specs) {
        if (ssaRegsMapped.get(spec.getReg())) {
            continue;
        }
        boolean succeeded;
        succeeded = tryMapReg(spec, ropReg, maxAllowedCategory);
        remaining = !succeeded || remaining;
        if (succeeded && markReserved) {
            // This only needs to be called once really with
            // the widest category used, but <shrug>
            markReserved(ropReg, spec.getCategory());
        }
    }
    return !remaining;
}

Example 77 with RegisterSpec

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

the class LivenessAnalyzer method liveOutAtStatement.

/**
     * "v is live-out at s."
     */
private void liveOutAtStatement() {
    SsaInsn statement = blockN.getInsns().get(statementIndex);
    RegisterSpec rs = statement.getResult();
    if (!statement.isResultReg(regV)) {
        if (rs != null) {
            interference.add(regV, rs.getReg());
        }
        nextFunction = NextFunction.LIVE_IN_AT_STATEMENT;
    }
}

Example 78 with RegisterSpec

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

the class SsaInsn method mapRegisters.

/**
     * Map registers after register allocation.
     *
     * @param mapper {@code non-null;} mapping from old to new registers
     */
public final void mapRegisters(RegisterMapper mapper) {
    RegisterSpec oldResult = result;
    result = mapper.map(result);
    block.getParent().updateOneDefinition(this, oldResult);
    mapSourceRegisters(mapper);
}

Example 79 with RegisterSpec

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

the class ConstCollector method fixLocalAssignment.

/**
     * Inserts mark-locals if necessary when changing a register. If
     * the definition of {@code origReg} is associated with a local
     * variable, then insert a mark-local for {@code newReg} just below
     * it. We expect the definition of  {@code origReg} to ultimately
     * be removed by the dead code eliminator
     *
     * @param origReg {@code non-null;} original register
     * @param newReg {@code non-null;} new register that will replace
     * {@code origReg}
     */
private void fixLocalAssignment(RegisterSpec origReg, RegisterSpec newReg) {
    for (SsaInsn use : ssaMeth.getUseListForRegister(origReg.getReg())) {
        RegisterSpec localAssignment = use.getLocalAssignment();
        if (localAssignment == null) {
            continue;
        }
        if (use.getResult() == null) {
            /*
                 * This is a mark-local. it will be updated when all uses
                 * are updated.
                 */
            continue;
        }
        LocalItem local = localAssignment.getLocalItem();
        // Un-associate original use.
        use.setResultLocal(null);
        // Now add a mark-local to the new reg immediately after.
        newReg = newReg.withLocalItem(local);
        SsaInsn newInsn = SsaInsn.makeFromRop(new PlainInsn(Rops.opMarkLocal(newReg), SourcePosition.NO_INFO, null, RegisterSpecList.make(newReg)), use.getBlock());
        ArrayList<SsaInsn> insns = use.getBlock().getInsns();
        insns.add(insns.indexOf(use) + 1, newInsn);
    }
}

Example 80 with RegisterSpec

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

the class ConstCollector method run.

/**
     * Applies the optimization.
     */
private void run() {
    int regSz = ssaMeth.getRegCount();
    ArrayList<TypedConstant> constantList = getConstsSortedByCountUse();
    int toCollect = Math.min(constantList.size(), MAX_COLLECTED_CONSTANTS);
    SsaBasicBlock start = ssaMeth.getEntryBlock();
    // Constant to new register containing the constant
    HashMap<TypedConstant, RegisterSpec> newRegs = new HashMap<TypedConstant, RegisterSpec>(toCollect);
    for (int i = 0; i < toCollect; i++) {
        TypedConstant cst = constantList.get(i);
        RegisterSpec result = RegisterSpec.make(ssaMeth.makeNewSsaReg(), cst);
        Rop constRop = Rops.opConst(cst);
        if (constRop.getBranchingness() == Rop.BRANCH_NONE) {
            start.addInsnToHead(new PlainCstInsn(Rops.opConst(cst), SourcePosition.NO_INFO, result, RegisterSpecList.EMPTY, cst));
        } else {
            // We need two new basic blocks along with the new insn
            SsaBasicBlock entryBlock = ssaMeth.getEntryBlock();
            SsaBasicBlock successorBlock = entryBlock.getPrimarySuccessor();
            // Insert a block containing the const insn.
            SsaBasicBlock constBlock = entryBlock.insertNewSuccessor(successorBlock);
            constBlock.replaceLastInsn(new ThrowingCstInsn(constRop, SourcePosition.NO_INFO, RegisterSpecList.EMPTY, StdTypeList.EMPTY, cst));
            // Insert a block containing the move-result-pseudo insn.
            SsaBasicBlock resultBlock = constBlock.insertNewSuccessor(successorBlock);
            PlainInsn insn = new PlainInsn(Rops.opMoveResultPseudo(result.getTypeBearer()), SourcePosition.NO_INFO, result, RegisterSpecList.EMPTY);
            resultBlock.addInsnToHead(insn);
        }
        newRegs.put(cst, result);
    }
    updateConstUses(newRegs, regSz);
}