[PATCH] D150388: [CodeGen]Allow targets to use target specific COPY instructions for live range splitting

Mon Jul 17 17:08:50 PDT 2023

arsenm added a comment.

In D150388#4508276 <https://reviews.llvm.org/D150388#4508276>, @arsenm wrote:

>> There's something wrong elsewhere even if this fixes it, but I can't see what else would change anything
>
> I just spotted a bug, isCopyOfBundle isn't using the proper result from isCopyInstr. Copy bundles are niche enough that I'd be surprised if they help your case (x86 I presume?)

Try 825b7f0ca5f2211ec3c93139f98d1e24048c225c <https://reviews.llvm.org/rG825b7f0ca5f2211ec3c93139f98d1e24048c225c>

I'm still very interested in getting a reproducer if this fixes it. It's usually hard to synthetically craft one for cases like this. If you send IR + invocation I can quickly reduce cases where this patch introduces a diff

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D150388/new/

https://reviews.llvm.org/D150388