Re-introduce "XLA_USE_32BIT_LONG" flag #8589
Merged
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Cherry pick of #8571
In this PR, we reintroduce the
XLA_USE_32BIT_LONG
flag to give customers the flexibility to use INT32 for their workloads. This was previously removed in 2.5 in #7582. PyTorch's inept INT32 support across the board (pytorch/pytorch#141994) remains an issue, but given that some hw compilers do not support 64-bit types, this helps unblock customers who require this implicit XLA downcasting.There were previously no tests for
XLA_USE_32BIT_LONG
, so simultaneously refined the test to not require specifying the flag prior to calling the test, and extending the tests to capture more cases.