[llvm] [LV][EVL]Support reversed loads/stores. (PR #88025)

[via llvm-commits]

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@@ -9419,11 +9424,10 @@ void VPWidenLoadEVLRecipe::execute(VPTransformState &State) {
       0, Attribute::getWithAlignment(NewLI->getContext(), Alignment));
   State.addMetadata(NewLI, LI);
   Instruction *Res = NewLI;
-  if (isReverse()) {
-    Res =
-        Builder.CreateIntrinsic(DataTy, Intrinsic::experimental_vp_reverse,
-                                {Res, AllTrueMask, EVL}, nullptr, "vp.reverse");
-  }
+  if (isReverse())
+    // Use cheap all-true mask for reverse rather than actual mask, it does not
+    // affect the result.
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ayalz wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/88025