[llvm] [LV] Convert gather loads with invariant stride into strided loads (PR #147297)

[Florian Hahn via llvm-commits]

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@@ -7520,7 +7527,10 @@ VPRecipeBuilder::tryToWidenMemory(Instruction *I, ArrayRef<VPValue *> Operands,
           new VPVectorEndPointerRecipe(Ptr, &Plan.getVF(), getLoadStoreType(I),
                                        /*Stride*/ -1, Flags, I->getDebugLoc());
     } else {
-      VectorPtr = new VPVectorPointerRecipe(Ptr, getLoadStoreType(I),
+      const DataLayout &DL = I->getDataLayout();
+      auto *StrideTy = DL.getIndexType(Ptr->getUnderlyingValue()->getType());
+      VPValue *StrideOne = Plan.getOrAddLiveIn(ConstantInt::get(StrideTy, 1));
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fhahn wrote:

```suggestion
      VPValue *StrideOne = Plan.getConstantInt(StrideTy, 1);
```

https://github.com/llvm/llvm-project/pull/147297