[llvm] [AArch64][SVE] Add SubtargetFeature to disable lowering unpredicated loads/stores as… (PR #170256)

[Kinoshita Kotaro via llvm-commits]

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@@ -443,6 +443,8 @@ def AllowMisalignedMemAccesses
 
 def UseWzrToVecMove : Predicate<"Subtarget->useWzrToVecMove()">;
 
+def AllowUnpredicatedLdStLower
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kinoshita-fj wrote:

Thank you for the suggestion. While that name describes the final outcome, this feature currently only targets disabling the lowering of unpredicated loads/stores to LDR/STR, so I'd like to keep the current name.

https://github.com/llvm/llvm-project/pull/170256