[flang-commits] [flang] [flang] add simplification for ProductOp intrinsic (PR #169575)

[Eugene Epshteyn via flang-commits]

eugeneepshteyn wrote:

@stomfaig , have you done actual functional testing on this change?  For example, it's probably a good idea to run this change through llvm-test-suite Fortran tests. I will also run this with internal testing.

https://github.com/llvm/llvm-project/pull/169575