[flang-commits] [flang] [flang][OpenMP] Allocate `allocatable` init temps on the stack for GPUs (PR #164761)

[Tom Eccles via flang-commits]

tblah wrote:

> Is it legal to reallocate/deallocate the private ALLOCATABLE on the device? If so, I am not sure this would work after your patch.

Good point.

@ergawy note that even in cases when the OpenMP standard says explicit reallocation is not allowed (I haven't checked this case), there can still be implicit reallocations due to assignments (this has caught me out before). You will have to take care that these do not try to `free()` the stack allocation. 

https://github.com/llvm/llvm-project/pull/164761