Examples of com.android.dx.ssa.SsaInsn

com.android.dx.ssa.SsaInsn
An instruction in SSA form


    /**
     * "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;
        }

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     * @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.");

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     *
     * @param reg register
     * @return {@code 1..2}
     */
    protected final int getCategoryForSsaReg(int reg) {
        SsaInsn definition = ssaMeth.getDefinitionForRegister(reg);


        if (definition == null) {
            // an undefined reg
            return 1;
        } else {
            return definition.getResult().getCategory();
        }
    }

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     * @param reg {@code >= 0;} SSA register
     * @return definition spec of the register or null if it is never defined
     * (for the case of "version 0" SSA registers)
     */
    protected final RegisterSpec getDefinitionSpecForSsaReg(int reg) {
        SsaInsn definition = ssaMeth.getDefinitionForRegister(reg);


        return definition == null ? null : definition.getResult();
    }

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     * 
     * @param reg register in question
     * @return {@code true} if this is a method parameter
     */
    protected boolean isDefinitionMoveParam(int reg) {
        SsaInsn defInsn = ssaMeth.getDefinitionForRegister(reg);


        if (defInsn instanceof NormalSsaInsn) {
            NormalSsaInsn ndefInsn = (NormalSsaInsn) defInsn;


            return ndefInsn.getOpcode().getOpcode() == RegOps.MOVE_PARAM;

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        // The new result must not have an associated local variable.
        RegisterSpec newRegSpec = RegisterSpec.make(ssaMeth.makeNewSsaReg(),
                reg.getTypeBearer());


        SsaInsn toAdd = SsaInsn.makeFromRop(
                new PlainInsn(Rops.opMove(newRegSpec.getType()),
                        SourcePosition.NO_INFO, newRegSpec,
                        RegisterSpecList.make(reg)), block);


        insns.add(insnIndex, toAdd);

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     *
     * @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;
    }

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            /**
             * If the predecessor block has a check-cast, it will be the last
             * instruction
             */
            SsaInsn checkCastInsn = insnList.get(insnList.size() - 1);
            if (checkCastInsn.getOpcode().getOpcode() != RegOps.CHECK_CAST) {
                continue;
            }


            RegisterSpec checkRegSpec = checkCastInsn.getSources().get(0);
            int checkReg = checkRegSpec.getReg();


            // Assume none of the register is mapped yet
            int ropReg = 0;

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Related Classes of com.android.dx.ssa.SsaInsn

com.android.dx.ssa.back.FirstFitLocalCombiningAllocator

com.android.dx.ssa.back.LivenessAnalyzer

com.android.dx.ssa.back.RegisterAllocator

com.android.dx.ssa.back.SsaToRop

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