[PATCH] D113574: [ARM] Fold floating point select(binop) patterns

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, samtebbs, ostannard, simon_tatham.
Herald added subscribers: hiraditya, kristof.beyls.
dmgreen requested review of this revision.
Herald added a project: LLVM.

Similar to D84091 <https://reviews.llvm.org/D84091> which added extra extra predicated folds for integer operations using the identity element of the operation, this adds them for floating point operations for the form `BinOp(x, select(p, y, Identity))`. They are folded back to predicated versions of the operator, with fadd having the identity -0.0, fsub using the identity 0.0 and fmul using 1.0.


https://reviews.llvm.org/D113574

Files:
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-pred-selectop3.ll

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