[PATCH] D87554: [GISel]: Add combine for G_FABS to G_FABS

[Michael Kitzan via Phabricator via llvm-commits]

mkitzan created this revision.
mkitzan added reviewers: aditya_nandakumar, volkan, dsanders, paquette, arsenm.
mkitzan added a project: LLVM.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls.
mkitzan requested review of this revision.
Herald added a subscriber: wdng.

Patch adds one new `GICombinerRule` for `G_FABS`. The combine rule folds `G_FABS(G_FABS(X))` to `G_FABS(X)`. Patch additionally adds new combiner tests for the AArch64 target to test this new combiner rule.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87554

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fabs.mir

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