[llvm] [LV][EVL] Attach a new metadata on EVL vectorized loops (PR #131000)

[Florian Hahn via llvm-commits]

================
@@ -1013,6 +1013,32 @@ void VPlan::execute(VPTransformState *State) {
     Value *Val = State->get(PhiR->getBackedgeValue(), NeedsScalar);
     cast<PHINode>(Phi)->addIncoming(Val, VectorLatchBB);
   }
+
+  // Check if it's EVL-vectorized and mark the corresponding metadata.
+  // Note that we could have done this during the codegen of
+  // ExplictVectorLength, but the enclosing vector loop was not in a good shape
+  // for us to attach the metadata.
+  bool IsEVLVectorized = llvm::any_of(*Header, [](const VPRecipeBase &Recipe) {
----------------
fhahn wrote:

```suggestion
  bool IsEVLVectorized = any_of(*Header, [](const VPRecipeBase &Recipe) {
```

https://github.com/llvm/llvm-project/pull/131000