[PATCH] D86862: [NFC] [DAGCombiner] Refactor bitcast folding within fabs/fneg

[Qiu Chaofan via Phabricator via llvm-commits]

qiucf created this revision.
qiucf added reviewers: spatel, steven.zhang, efriedma, RKSimon, jsji, craig.topper.
Herald added subscribers: llvm-commits, ecnelises, danielkiss, hiraditya.
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qiucf requested review of this revision.

`fabs` and `fneg` share a common transformation:

  (fneg (bitconvert x)) -> (bitconvert (xor x sign))
  (fabs (bitconvert x)) -> (bitconvert (and x ~sign))

This patch separate the code into a single method.


https://reviews.llvm.org/D86862

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

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