[PATCH] D125504: [AArch64] Add `foldCSELOfCSEl` DAG combine

[Karl Meakin via Phabricator via llvm-commits]

Kmeakin added a comment.

In D125504#3728198 <https://reviews.llvm.org/D125504#3728198>, @mstorsjo wrote:

> I also ran into a case where this commit broke things. One of the miscompiled files is https://martin.st/temp/bprint-preproc.c, compiled with `clang -target aarch64-linux-gnu bprint-preproc.c -O3`, if that helps identifying what the issue is.

Could you elaborate on what broke? What output were you expecting, and how did it change after this patch?


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  https://reviews.llvm.org/D125504/new/

https://reviews.llvm.org/D125504