[llvm] [VPlan] Extract reverse operation for reverse accesses (PR #146525)

[Mel Chen via llvm-commits]

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@@ -7756,14 +7756,27 @@ VPRecipeBuilder::tryToWidenMemory(Instruction *I, ArrayRef<VPValue *> Operands,
     Builder.insert(VectorPtr);
     Ptr = VectorPtr;
   }
-  if (LoadInst *Load = dyn_cast<LoadInst>(I))
-    return new VPWidenLoadRecipe(*Load, Ptr, Mask, Consecutive, Reverse,
-                                 VPIRMetadata(*Load, LVer), I->getDebugLoc());
 
-  StoreInst *Store = cast<StoreInst>(I);
-  return new VPWidenStoreRecipe(*Store, Ptr, Operands[0], Mask, Consecutive,
+  if (auto *Load = dyn_cast<LoadInst>(I)) {
+    auto *LoadR =
+        new VPWidenLoadRecipe(*Load, Ptr, Mask, Consecutive, Reverse,
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Mel-Chen wrote:

There was a similar discussion earlier: https://github.com/llvm/llvm-project/pull/146525#discussion_r2242195741
I think it would be good to continue the discussion in the same comment thread.

https://github.com/llvm/llvm-project/pull/146525