[all-commits] [llvm/llvm-project] d9af9c: [ARM] Fold floating point select(binop) patterns

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d9af9c2c5a53c9ba6aa0255240a2a40e8bea27aa
      https://github.com/llvm/llvm-project/commit/d9af9c2c5a53c9ba6aa0255240a2a40e8bea27aa
  Author: David Green <david.green at arm.com>
  Date:   2021-11-24 (Wed, 24 Nov 2021)

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

  Log Message:
  -----------
  [ARM] Fold floating point select(binop) patterns

Similar to D84091 which added 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.

Differential Revision: https://reviews.llvm.org/D113574