[flang-commits] [flang] [llvm] [flang][OpenMP] Overhaul implementation of ATOMIC construct (PR #137852)

[Krzysztof Parzyszek via flang-commits]

kparzysz wrote:

The "endatomic" is no longer valid in 6.0: [6.0:150:15-18]

> Some directives have underscores in their directive-name. Some of those directives are explicitly specified alternatively to allow the underscores in their directive-name to be replaced with white space. In addition, if a directive-name starts with either begin or end then it is separated from the rest of the directive-name by white space.

It's still legal in 5.2-, so we need to support it.

https://github.com/llvm/llvm-project/pull/137852