Merge c9539f957f57c0c2c59dab98f25215f241d4debf into 13.0.1

[llvmbot]

Bugzilla Link	52555
Version	unspecified
OS	All
Blocks	#51489
Reporter	LLVM Bugzilla Contributor
CC	@DimitryAndric,@nemanjai,@zygoloid,@tstellar
Fixed by commit(s)	c9539f9

Extended Description

Please merge c9539f9.

[PATCH] [PowerPC] Define XL-compatible macros only for AIX and Linux

Since XLC only ever shipped on PowerPC AIX and Linux, it is not reasonable to
provide the compatibility macros on any target other than those two. This patch
restricts those macros to AIX/Linux.

[DimitryAndric]

Yeah having this one in 13.0.1 would be nice. We already use this in FreeBSD. :)

[tstellar]

Hi Unassigned,

What is your opinion on backporting this?

https://reviews.llvm.org/rGc9539f957f57c0c2c59dab98f25215f241d4debf

[DimitryAndric]

FWIW I brought this up originally, I think on IRC maybe even, and Nemanja implemented the fix. Nemanja, can you please give a thumbs up? :)

[nemanjai]

Yes, please go ahead and merge this.

[tstellar]

This does not apply cleanly, can someone merge it and push the result to a github fork?

[tstellar]

This fix does not apply cleanly to the release branch. Could someone resolve the merge conflicts and push it to a github fork.

[tstellar]

Merged: 9468a0f