[llvm] WIP:[LV] Support strided memory accesses with a stride of -1 (PR #128718)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff 1a114fa302b48fc761a58a8d3be5962d92fa581b 58c4e41789e05d88fdb1463cc8695dee3b4a2b20 --extensions h,cpp -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlan.h llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp llvm/unittests/Transforms/Vectorize/VPlanTest.cpp
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index 7edb28a5e1..3cdd45b566 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -2567,10 +2567,10 @@ InstructionCost VPWidenMemoryRecipe::computeCost(ElementCount VF,
       return Ctx.TTI.getStridedMemoryOpCost(Ingredient.getOpcode(), Ty, Ptr,
                                             IsMasked, Alignment, Ctx.CostKind,
                                             &Ingredient);
-      return Ctx.TTI.getAddressComputationCost(Ty) +
-             Ctx.TTI.getGatherScatterOpCost(Ingredient.getOpcode(), Ty, Ptr,
-                                            IsMasked, Alignment, Ctx.CostKind,
-                                            &Ingredient);
+    return Ctx.TTI.getAddressComputationCost(Ty) +
+           Ctx.TTI.getGatherScatterOpCost(Ingredient.getOpcode(), Ty, Ptr,
+                                          IsMasked, Alignment, Ctx.CostKind,
+                                          &Ingredient);
   }
 
   InstructionCost Cost = 0;

``````````

</details>


https://github.com/llvm/llvm-project/pull/128718