[PATCH] D43380: [X86] Disable CLWB in Cannon Lake

[Eric Christopher via Phabricator via llvm-commits]

echristo added a comment.

We have some testcases like this, but not a lot. We could add one - also we should probably not assemble if we're using cannonlake as well. The aarch64 backend has some examples of llvm-mc tests in this case.

In https://reviews.llvm.org/D43380#1010794, @craig.topper wrote:

> How do we test this? You'd have to verify that the clwb intrinsic throws a cannot select error on cannonlake, but do we do that in llc lit tests today?





Repository:
  rL LLVM

https://reviews.llvm.org/D43380