[llvm] [AArch64] Disconnect FeatureUseScalarIncVL from FeatureSVE2. (PR #114568)

[David Green via llvm-commits]

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@@ -575,6 +579,14 @@ void AArch64Subtarget::mirFileLoaded(MachineFunction &MF) const {
 
 bool AArch64Subtarget::useAA() const { return UseAA; }
 
+bool AArch64Subtarget::useScalarIncVL() const {
+  // If SVE2 or SME is present (we are not SVE-1 only) and UseScalarIncVL
+  // is not otherwise set, enable it by default.
+  if (UseScalarIncVL.getNumOccurrences())
+    return UseScalarIncVL;
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davemgreen wrote:

Thanks - We would probably want go the other way and reintroduce the target features if we needed it for a specific CPU. The preferred way is for tuning features to control the options, which are applied to given cpus that they are relevant to.

https://github.com/llvm/llvm-project/pull/114568