How to use the llvmlite.llvmpy.core.Constant.int function in llvmlite

def __init__(self, context, builder, idxty, idxary):
        self.context = context
        self.builder = builder
        self.idxty = idxty
        self.idxary = idxary
        assert idxty.ndim == 1
        self.ll_intp = self.context.get_value_type(types.intp)
        self.zero = Constant.int(self.ll_intp, 0)

from numba import cgutils
from numba.utils import IS_PY3
from . import llvm_types as lt
from numba.compiler import compile_extra, Flags
from numba.compiler_lock import global_compiler_lock

from numba.targets.registry import cpu_target
from numba.runtime import nrtdynmod


logger = logging.getLogger(__name__)

__all__ = ['Compiler']

NULL = lc.Constant.null(lt._void_star)
ZERO = lc.Constant.int(lt._int32, 0)
ONE = lc.Constant.int(lt._int32, 1)
METH_VARARGS_AND_KEYWORDS = lc.Constant.int(lt._int32, 1|2)


def get_header():
    import numpy
    import textwrap

    return textwrap.dedent("""\
    #include 

    #ifndef HAVE_LONGDOUBLE
        #define HAVE_LONGDOUBLE %d
    #endif

    typedef struct {

def _impl(context, builder, sig, args):
        """
        args are (index, src)
        """
        assert sig.return_type == sig.args[1]
        idx, src = args
        i32 = Type.int(32)
        fnty = Type.function(i32, [i32, i32])
        fn = builder.module.declare_intrinsic(intrinsic_name, fnty=fnty)
        # the args are byte addressable, VGPRs are 4 wide so mul idx by 4
        # the idx might be an int64, this is ok to trunc to int32 as
        # wavefront_size is never likely overflow an int32
        idx = builder.trunc(idx, i32)
        four = lc.Constant.int(i32, 4)
        idx = builder.mul(idx, four)
        # bit cast is so float32 works as packed i32, the return casts back
        result = builder.call(fn, (idx, builder.bitcast(src, i32)))
        return builder.bitcast(result, context.get_value_type(sig.return_type))
    return _impl

def is_leap_year(builder, year_val):
    """
    Return a predicate indicating whether *year_val* (offset by 1970) is a
    leap year.
    """
    actual_year = builder.add(year_val, Constant.int(DATETIME64, 1970))
    multiple_of_4 = cgutils.is_null(
        builder, builder.and_(actual_year, Constant.int(DATETIME64, 3)))
    not_multiple_of_100 = cgutils.is_not_null(
        builder, builder.srem(actual_year, Constant.int(DATETIME64, 100)))
    multiple_of_400 = cgutils.is_null(
        builder, builder.srem(actual_year, Constant.int(DATETIME64, 400)))
    return builder.and_(multiple_of_4,
                        builder.or_(not_multiple_of_100, multiple_of_400))

def update_indices(self, loop_indices, name):
        bld = self.array.builder
        intpty = self.array.context.get_value_type(types.intp)
        ONE = lc.Constant.int(lc.Type.int(intpty.width), 1)

        # we are only interested in as many inner dimensions as dimensions
        # the indexed array has (the outer dimensions are broadcast, so
        # ignoring the outer indices produces the desired result.
        indices = loop_indices[len(loop_indices) - len(self.indices):]
        for src, dst, dim in zip(indices, self.indices, self.array.shape):
            cond = bld.icmp(lc.ICMP_UGT, dim, ONE)
            with bld.if_then(cond):
                bld.store(src, dst)

def set_cuda_kernel(lfunc):
    from llvmlite.llvmpy.core import MetaData, MetaDataString, Constant, Type

    m = lfunc.module

    ops = lfunc, MetaDataString.get(m, "kernel"), Constant.int(Type.int(), 1)
    md = MetaData.get(m, ops)

    nmd = m.get_or_insert_named_metadata('nvvm.annotations')
    nmd.add(md)

    # set nvvm ir version
    i32 = ir.IntType(32)
    md_ver = m.add_metadata([i32(1), i32(2), i32(2), i32(0)])
    m.add_named_metadata('nvvmir.version', md_ver)

def int_sign_impl(context, builder, sig, args):
    """
    np.sign(int)
    """
    [x] = args
    POS = Constant.int(x.type, 1)
    NEG = Constant.int(x.type, -1)
    ZERO = Constant.int(x.type, 0)

    cmp_zero = builder.icmp(lc.ICMP_EQ, x, ZERO)
    cmp_pos = builder.icmp(lc.ICMP_SGT, x, ZERO)

    presult = cgutils.alloca_once(builder, x.type)

    bb_zero = builder.append_basic_block(".zero")
    bb_postest = builder.append_basic_block(".postest")
    bb_pos = builder.append_basic_block(".pos")
    bb_neg = builder.append_basic_block(".neg")
    bb_exit = builder.append_basic_block(".exit")

    builder.cbranch(cmp_zero, bb_zero, bb_postest)

    with builder.goto_block(bb_zero):
        builder.store(ZERO, presult)

    make_constant = lambda x: lc.Constant.int(lc.Type.int(), x)
    spir_version_constant = [make_constant(x) for x in SPIR_VERSION]