caio/clang-p2996

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Valentin Clement 9ed76f3958 [flang][openacc] Relax clause rule on routine directive

Some compiler treat `acc routine` without a parallelism clause as
if seq is present. Relax the parser rule to allow acc routine
without clause. The default clause will be handled in lowering.

Reviewed By: razvanlupusoru

Differential Revision: https://reviews.llvm.org/D153896

2023-06-28 09:07:38 -07:00

520 B

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OpenACC in Flang

.. contents::
   :local:

Intentional deviation from the specification

The end directive for combined construct can omit the loop keyword.
An !$acc routine with no parallelism clause is treated as if the seq clause was present.