[all-commits] [llvm/llvm-project] 93c678: [X86] Simplify vpternlog immediate selection.

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 93c678a79b0a8914954d77973593ea36706db5d5
      https://github.com/llvm/llvm-project/commit/93c678a79b0a8914954d77973593ea36706db5d5
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-07-31 (Fri, 31 Jul 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelDAGToDAG.cpp

  Log Message:
  -----------
  [X86] Simplify vpternlog immediate selection.

Rather than hardcoding immediate values for 12 different combinations
in a nested pair of switches, we can perform the matched logic
operation on 3 magic constants to calculate the immediate.

Special thanks to this tweet https://twitter.com/rygorous/status/1187034321992871936
for making me realize I could do this.