Demonstration of using a Numba target context to get the LLVM type for a Numba type

usectx.py

from numba import float64
from numba.core import typing, cpu

# Create a Numba type - a 1D C-ordered array of float64
numba_arr_type = float64[::1]
print("Numba type:", numba_arr_type)

# Construct a Numba target context for the CPU and use it to get the LLVM type
# for the given Numba type in that context
typingctx = typing.Context()
targetctx = cpu.CPUContext(typingctx, target='cpu')

llvm_arr_type = targetctx.get_value_type(numba_arr_type)
print("LLVM type: ", llvm_arr_type)

# Output:
# Numba type: array(float64, 1d, C)
# LLVM type:  {i8*, i8*, i64, i64, double*, [1 x i64], [1 x i64]}