tree 54aa37b97238b0529cbe0b64c00d34bdb206b14b
parent 424127e87444c7cca735f9c09e9812a443410f7b
author Tom Eccles <tom.eccles@arm.com> 1713864868 +0100
committer Copybara-Service <copybara-worker@google.com> 1713864957 -0700

[flang][OpenMP] Support reduction of allocatable variables (#88392)

Both arrays and trivial scalars are supported. Both cases must use
by-ref reductions because both are boxed.

My understanding of the standards are that OpenMP says that this should
follow the rules of the intrinsic reduction operators in fortran, and
fortran says that unallocated allocatable variables can only be
referenced to allocate them or test if they are already allocated.
Therefore we do not need a null pointer check in the combiner region.

GitOrigin-RevId: 8cc34fadec71c358c2c69bbca236294afb259e02