[PATCH] D79972: [OpenMP5.0] map item can be non-contiguous for target update

[Chi Chun Chen via Phabricator via cfe-commits]

cchen added a comment.

In D79972#2104854 <https://reviews.llvm.org/D79972#2104854>, @RaviNarayanaswamy wrote:

> How do you plan to support 
>  #pragma omp target update to (arr[1:2][1:2][0:2], x, b[1:5][0:2])
>  Are you going to split this into 3 updates since your are using the arg fields.


There's only one runtime call for your case. and args will be { descriptor_1, x, descriptor_2 }, where descriptor_1 will be { { 1, 2, 80 }, { 1, 2, 20 }, { 0, 2, 4 } }, descriptor_2 will be { { 1, 5, 16 }, { 0, 2, 4 } }. There's analysis in Sema that detecting if the item is non-contiguous or not and codegen only generate descriptor for non-contiguous item.


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