I've implemented this out of tree (for Graphcore), based loosely on the PPC implementation. IR pass based on SCEV inserts intrinsics, SDag patches them up a little, MIR pass picks appropriate instructions or falls back to a decrement and branch loop.

It looks like the changes to support/commandline are useful independent of the file check use case. Would it be worth submitting the command line enhancement by itself before updating filecheck to take advantage?

Thank you. I've just seen the buildbot failure but you've beaten me to the patch. Embarrassing error, sorry.

In D34685#813125, @ruiu wrote:

LGTM

In D34685#796846, @ruiu wrote:

You can distinguish by filename, as target-specific tests start with target name.

In D34685#796778, @ruiu wrote:

I'm still waiting for you to update this patch to address Rafael's comment.

Thanks Paul. This is my first time looking at lld, the guidance is appreciated.

Thanks, I hadn't spotted llvm-commits. I'll send them a message.

Thank you for the review. Could you commit the patch? I don't have write access to the repo.

• Change for to while

Thanks. I have no commit access.