[PATCH] D92154: [AArch64] Add custom lowering for ISD::ABS

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Nov 25 22:43:27 PST 2020

craig.topper created this revision.
craig.topper added reviewers: t.p.northover, efriedma, spatel, RKSimon, dmgreen.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
Herald added a project: LLVM.
craig.topper requested review of this revision.

Instead of trying to pattern match the code produced by ISD::ABS expansion, just custom legalize ISD::ABS to the desired sequence.

The one test change is because a DAG combine for (neg (abs)) is no longer firing because ISD::ABS is now Custom instead of Expand.



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