llvm-project

6b52fb25 - [flang] Correctly handle `!dir$ unroll` with unrolling factors of 0 and 1 (#126170)

[flang] Correctly handle `!dir$ unroll` with unrolling factors of 0 and 1 (#126170) https://github.com/llvm/llvm-project/pull/123331 added support for the unrolling directive. In the presence of an explicit unrolling factor, that unrolling factor would be unconditionally passed into the metadata even when it was 1 or 0. These special cases should instead disable unrolling. Adding an explicit unrolling factor of 0 triggered this assertion which is fixed by this patch: ``` unsigned int unrollCountPragmaValue(const llvm::Loop*): Assertion `Count >= 1 && "Unroll count must be positive."' failed. ``` Updated tests and documentation.