[flang-commits] [clang] [flang] [llvm] [flang][cmake][perf-training] Optimize flang with PGO and BOLT (PR #198863)

[Michael Kruse via flang-commits]

Meinersbur wrote:

> I've rebased this PR, but the changes that were needed to make all of the `check-flang` tests pass do seriously worry me: 

Which changes? I only see `BufSize` and `offload-device.f90` need adaptation, outside adding the initial infrastructure.

> people will be introducing the changes that will be breaking the perf-training builds, and it will be the responsibility of those unfortunates who rely on that to fix those breaking changes. Sadly, one of those unfortunates will be me. This makes me wonder if we're doing the right thing re-using the `check-flang` test suite for a new purpose.

> It becomes more and more apparent. But what the alternative would be?

Create an RFC on Discourse then? Otherwise, I would actually greenlight this PR.

https://github.com/llvm/llvm-project/pull/198863