[OpenMP][libomptarget] Add support for declare target to clause under unified memory

This patch adds support for handling variables under the:

#pragma omp declare target to()

clause when the 

#pragma omp requires unified_shared_memory

is used.

The address of the host variable is copied into the device pointer just like for the declare target link case.

Reviewers: ABataev, caomhin, grokos, AlexEichenberger

Reviewed By: grokos

Subscribers: jcownie, guansong, jdoerfert, openmp-commits

Tags: #openmp

Differential Revision: https://reviews.llvm.org/D63106

git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@363825 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed