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

[Florian Hahn via llvm-commits]

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@@ -9406,7 +9405,14 @@ static Instruction *lowerLoadUsingVectorIntrinsics(IRBuilderBase &Builder,
   }
   Call->addParamAttr(
       0, Attribute::getWithAlignment(Call->getContext(), Alignment));
-  return Call;
+  Instruction *Res = Call;
+  if (IsReverse) {
+    Value *BlockInMaskPart = Builder.getAllOnesMask(DataTy->getElementCount());
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fhahn wrote:

Would be good to clarify the name here, the variable is not really for the block-in mask and independent of a part.

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