[flang-commits] [flang] [llvm] [flang-rt] Copy out only the modified suffix of an argument temporary (PR #222101)

[Eugene Epshteyn via flang-commits]

eugeneepshteyn wrote:

> Can you run perf numbers on CPU2017/521.wrf if you have not already? While I am not 100% sure, I think this is a benchmark that emits copy-out (although I am not sure if they are used at runtime given the data is contiguous).

It's possible to pick WRF inputs that cause non-contiguous args that require copy-in/copy-out. There doesn't seem to be statistically significant performance differences for non-contiguous cases in WRF with this PR and with the baseline.

https://github.com/llvm/llvm-project/pull/222101