[flang-commits] [flang] [llvm] [flang] Implement SPLIT intrinsic subroutine with tests (PR #185584)

[Tarun Prabhu via flang-commits]

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tarunprabhu wrote:

This test checks that when `BACK` is not provided, it is set to `.FALSE.`. We should probably also test that if a value is explicitly provided, that it is lowered correctly.

https://github.com/llvm/llvm-project/pull/185584