[DirectX] Fix bug where Flatten arrays was only using last index (#144146)

fixes #142836

We added a function called `collectIndicesAndDimsFromGEP` which builds
the Indicies and Dims up for the recursive case and the base case.
really to solve #142836 we didn't need to add it to the recursive case.
The recursive cases exists for gep chains which are ussually two
indicies per gep ie ptr index and array index. adding
collectIndicesAndDimsFromGEP to the recursive cases means we can now do
some mixed mode indexing say we get a case where its not the ussual 2
indicies but instead 3 we can now treat those last two indicies as part
of the computation for the flat array index.

0 files changed, 0 insertions, 0 deletions