[PATCH] D30364: AArch64 : Add PreferCSEL feature for Exynos-M3.

[Junmo Park via Phabricator via llvm-commits]

flyingforyou added a comment.

Thanks for comment Renato.

This patch was inspired by below ARM's code. May I change this? What is your suggestion for the name "Don't use".?

  // Some targets (e.g. Cortex-A9) prefer VMOVSR to VMOVDRR even when using NEON
  // for scalar FP, as this allows more effective execution domain optimization.
  def FeaturePreferVMOVSR : SubtargetFeature<"prefer-vmovsr", "PreferVMOVSR",
                                             "true", "Prefer VMOVSR">;



  def UseVMOVSR : Predicate<"Subtarget->preferVMOVSR() ||"
                            "!Subtarget->useNEONForSinglePrecisionFP()">;
  def DontUseVMOVSR : Predicate<"!Subtarget->preferVMOVSR() &&"
                                "Subtarget->useNEONForSinglePrecisionFP()">;


https://reviews.llvm.org/D30364