The intrinsic returns the character located at the position requested
in the ASCII sequence. The intrinsic is lowered to inline FIR code.
This is part of the upstreaming effort from the fir-dev branch in [1].
[1] https://github.com/flang-compiler/f18-llvm-project
Reviewed By: clementval
Differential Revision: https://reviews.llvm.org/D122480
Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>
Kiran Chandramohan