[flang-commits] [clang] [flang] [flang] add -floop-interchange and enable it with opt levels (PR #140182)

[Sebastian Pop via flang-commits]

sebpop wrote:

> DA was already broken when this PR was submitted. 

This is wrong, we fixed all outstanding bugs reported against DA at the time when we enabled interchange in flang.

> I believe it's premature to enable any passes that rely on DA by default. 

If we don't enable interchange by default then we don't get more bugs reported against it because the pass is not getting used.

> This would not directly reflect the severity of the issue, but it's the conclusion I reached after thoroughly examining DA for a month. 
> There are simply too many bugs.

*too many* is not substantiated.
Please provide a list of bugs reported against flang due to interchange.


https://github.com/llvm/llvm-project/pull/140182