[flang] Add the proposal document and rationale for the internal naming module that was previously added.
This document describes how uniquing of internal names is done. This
name uniquing is done to support the constraints and invariants of the FIR
dialect of MLIR.
Reviewers: jeanPerier, mehdi_amini, DavidTruby, jdoerfert, sscalpone, kiranchandramohan
Reviewed By: jeanPerier, sscalpone, kiranchandramohan
Subscribers: tskeith, kiranchandramohan, rriddle, llvm-commits
Tags: #llvm, #flang
Differential Revision: https://reviews.llvm.org/D79089