[llvm] [RISCV][LoopVectorize] Use DataWithEVL as the preferred tail folding style (PR #148686)

[Alexey Bataev via llvm-commits]

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@@ -116,8 +116,7 @@ class RISCVTTIImpl final : public BasicTTIImplBase<RISCVTTIImpl> {
   }
   TailFoldingStyle
   getPreferredTailFoldingStyle(bool IVUpdateMayOverflow) const override {
-    return ST->hasVInstructions() ? TailFoldingStyle::Data
-                                  : TailFoldingStyle::DataWithoutLaneMask;
+    return TailFoldingStyle::DataWithEVL;
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alexey-bataev wrote:

Just None maybe, say,for P extensions?

https://github.com/llvm/llvm-project/pull/148686