[flang] Address review comments

Original-commit: flang-compiler/f18@59e5565cb87eebd2c4f44defd22484ca83777942
Reviewed-on: https://github.com/flang-compiler/f18/pull/926
Tree-same-pre-rewrite: false
7 files changed
tree: c79b12a84d8fcd3ec1cbb3fdb92b2f686031d786
  1. flang/