[llvm] [LV] Add support for speculative loads in loops that may fault (PR #151300)

[Alexey Bataev via llvm-commits]

================
@@ -7756,6 +7766,12 @@ VPRecipeBuilder::tryToWidenMemory(Instruction *I, ArrayRef<VPValue *> Operands,
     Builder.insert(VectorPtr);
     Ptr = VectorPtr;
   }
+  if (Legal->getSpeculativeLoads().contains(I)) {
+    LoadInst *Load = dyn_cast<LoadInst>(I);
----------------
alexey-bataev wrote:

```suggestion
    auto *Load = cast<LoadInst>(I);
```

https://github.com/llvm/llvm-project/pull/151300