示例#1
0
void CodeGen::genCodeForTreeFloat(GenTreePtr     tree,
                                  RegSet::RegisterPreference *pref)
{
    genTreeOps      oper;
    unsigned        kind;

    assert(tree);
    assert(tree->gtOper != GT_STMT);

    // What kind of node do we have?
    oper = tree->OperGet();
    kind = tree->OperKind();

    if  (kind & GTK_CONST)
    {
        genFloatConst(tree, pref);
    }
    else if (kind & GTK_LEAF)
    {
        genFloatLeaf(tree, pref);
    }
    else if (kind & GTK_SMPOP)
    {
        genFloatSimple(tree, pref);
    }
    else
    {
        assert(oper == GT_CALL);
        genCodeForCall(tree, true);
    }       
}
示例#2
0
bool RangeCheck::IsMonotonicallyIncreasing(GenTreePtr expr, SearchPath* path)
{
    JITDUMP("[RangeCheck::IsMonotonicallyIncreasing] %p\n", dspPtr(expr));
    if (path->Lookup(expr))
    {
        return true;
    }

    // Add hashtable entry for expr.
    path->Set(expr, NULL);

    // Remove hashtable entry for expr when we exit the present scope.
    auto code = [&] { path->Remove(expr); };
    jitstd::utility::scoped_code<decltype(code)> finally(code);

    // If the rhs expr is constant, then it is not part of the dependency
    // loop which has to increase monotonically.
    ValueNum vn = expr->gtVNPair.GetConservative();
    if (m_pCompiler->vnStore->IsVNConstant(vn))
    {
        return true;
    }
    // If the rhs expr is local, then try to find the def of the local.
    else if (expr->IsLocal())
    {
        Location* loc = GetDef(expr);
        if (loc == nullptr)
        {
            return false;
        }
        GenTreePtr asg = loc->parent;
        assert(asg->OperKind() & GTK_ASGOP);
        switch (asg->OperGet())
        {
        case GT_ASG:
            return IsMonotonicallyIncreasing(asg->gtGetOp2(), path);

        case GT_ASG_ADD:
            return IsBinOpMonotonicallyIncreasing(asg->gtGetOp1(), asg->gtGetOp2(), GT_ADD, path);
        }
        JITDUMP("Unknown local definition type\n");
        return false;
    }
    else if (expr->OperGet() == GT_ADD)
    {
        return IsBinOpMonotonicallyIncreasing(expr->gtGetOp1(), expr->gtGetOp2(), GT_ADD, path);
    }
    else if (expr->OperGet() == GT_PHI)
    {
        for (GenTreeArgList* args = expr->gtOp.gtOp1->AsArgList();
                args != nullptr; args = args->Rest())
        {
            // If the arg is already in the path, skip.
            if (path->Lookup(args->Current()))
            {
                continue;
            }
            if (!IsMonotonicallyIncreasing(args->Current(), path))
            {
                JITDUMP("Phi argument not monotonic\n");
                return false;
            }
        }
        return true;
    }
    JITDUMP("Unknown tree type\n");
    return false;
}