Examples with CstInteger com.android.dx.rop.cst.CstInteger used on opensource projects

Example 16 with CstInteger

use of com.android.dx.rop.cst.CstInteger in project J2ME-Loader by nikita36078.

the class MoveParamCombiner method getParamIndex.

/**
 * Returns the parameter index associated with a move-param insn. Does
 * not verify that the insn is a move-param insn.
 *
 * @param insn {@code non-null;} a move-param insn
 * @return {@code >=0;} parameter index
 */
private int getParamIndex(NormalSsaInsn insn) {
    CstInsn cstInsn = (CstInsn) (insn.getOriginalRopInsn());
    int param = ((CstInteger) cstInsn.getConstant()).getValue();
    return param;
}

Example 17 with CstInteger

use of com.android.dx.rop.cst.CstInteger in project J2ME-Loader by nikita36078.

the class SCCP method simulateBranch.

/**
 * Simulates branch insns, if possible. Adds reachable successor blocks
 * to the CFG worklists.
 * @param insn branch to simulate
 */
private void simulateBranch(SsaInsn insn) {
    Rop opcode = insn.getOpcode();
    RegisterSpecList sources = insn.getSources();
    boolean constantBranch = false;
    boolean constantSuccessor = false;
    // Check if the insn is a branch with a constant condition
    if (opcode.getBranchingness() == Rop.BRANCH_IF) {
        Constant cA = null;
        Constant cB = null;
        RegisterSpec specA = sources.get(0);
        int regA = specA.getReg();
        if (!ssaMeth.isRegALocal(specA) && latticeValues[regA] == CONSTANT) {
            cA = latticeConstants[regA];
        }
        if (sources.size() == 2) {
            RegisterSpec specB = sources.get(1);
            int regB = specB.getReg();
            if (!ssaMeth.isRegALocal(specB) && latticeValues[regB] == CONSTANT) {
                cB = latticeConstants[regB];
            }
        }
        // Calculate the result of the condition
        if (cA != null && sources.size() == 1) {
            switch(((TypedConstant) cA).getBasicType()) {
                case Type.BT_INT:
                    constantBranch = true;
                    int vA = ((CstInteger) cA).getValue();
                    switch(opcode.getOpcode()) {
                        case RegOps.IF_EQ:
                            constantSuccessor = (vA == 0);
                            break;
                        case RegOps.IF_NE:
                            constantSuccessor = (vA != 0);
                            break;
                        case RegOps.IF_LT:
                            constantSuccessor = (vA < 0);
                            break;
                        case RegOps.IF_GE:
                            constantSuccessor = (vA >= 0);
                            break;
                        case RegOps.IF_LE:
                            constantSuccessor = (vA <= 0);
                            break;
                        case RegOps.IF_GT:
                            constantSuccessor = (vA > 0);
                            break;
                        default:
                            throw new RuntimeException("Unexpected op");
                    }
                    break;
                default:
            }
        } else if (cA != null && cB != null) {
            switch(((TypedConstant) cA).getBasicType()) {
                case Type.BT_INT:
                    constantBranch = true;
                    int vA = ((CstInteger) cA).getValue();
                    int vB = ((CstInteger) cB).getValue();
                    switch(opcode.getOpcode()) {
                        case RegOps.IF_EQ:
                            constantSuccessor = (vA == vB);
                            break;
                        case RegOps.IF_NE:
                            constantSuccessor = (vA != vB);
                            break;
                        case RegOps.IF_LT:
                            constantSuccessor = (vA < vB);
                            break;
                        case RegOps.IF_GE:
                            constantSuccessor = (vA >= vB);
                            break;
                        case RegOps.IF_LE:
                            constantSuccessor = (vA <= vB);
                            break;
                        case RegOps.IF_GT:
                            constantSuccessor = (vA > vB);
                            break;
                        default:
                            throw new RuntimeException("Unexpected op");
                    }
                    break;
                default:
            }
        }
    }
    /*
         * If condition is constant, add only the target block to the
         * worklist. Otherwise, add all successors to the worklist.
         */
    SsaBasicBlock block = insn.getBlock();
    if (constantBranch) {
        int successorBlock;
        if (constantSuccessor) {
            successorBlock = block.getSuccessorList().get(1);
        } else {
            successorBlock = block.getSuccessorList().get(0);
        }
        addBlockToWorklist(ssaMeth.getBlocks().get(successorBlock));
        branchWorklist.add(insn);
    } else {
        for (int i = 0; i < block.getSuccessorList().size(); i++) {
            int successorBlock = block.getSuccessorList().get(i);
            addBlockToWorklist(ssaMeth.getBlocks().get(successorBlock));
        }
    }
}

Example 18 with CstInteger

use of com.android.dx.rop.cst.CstInteger in project J2ME-Loader by nikita36078.

the class FirstFitLocalCombiningAllocator method getParameterIndexForReg.

/**
 * Gets the parameter index for SSA registers that are method parameters.
 * {@code -1} is returned for non-parameter registers.
 *
 * @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;
}

Example 19 with CstInteger

use of com.android.dx.rop.cst.CstInteger in project dexmaker by linkedin.

the class Code method initializeLocals.

/**
 * Assigns registers to locals. From the spec:
 *  "the N arguments to a method land in the last N registers of the
 *   method's invocation frame, in order. Wide arguments consume two
 *   registers. Instance methods are passed a this reference as their
 *   first argument."
 *
 * In addition to assigning registers to each of the locals, this creates
 * instructions to move parameters into their initial registers. These
 * instructions are inserted before the code's first real instruction.
 */
void initializeLocals() {
    if (localsInitialized) {
        throw new AssertionError();
    }
    localsInitialized = true;
    int reg = 0;
    for (Local<?> local : locals) {
        reg += local.initialize(reg);
    }
    int firstParamReg = reg;
    List<Insn> moveParameterInstructions = new ArrayList<Insn>();
    for (Local<?> local : parameters) {
        CstInteger paramConstant = CstInteger.make(reg - firstParamReg);
        reg += local.initialize(reg);
        moveParameterInstructions.add(new PlainCstInsn(Rops.opMoveParam(local.type.ropType), sourcePosition, local.spec(), RegisterSpecList.EMPTY, paramConstant));
    }
    labels.get(0).instructions.addAll(0, moveParameterInstructions);
}