[llvm] [LV] Support binary and unary operations with EVL-vectorization (PR #93854)

[Florian Hahn via llvm-commits]

================
@@ -1435,6 +1450,48 @@ class VPWidenRecipe : public VPRecipeWithIRFlags {
 #endif
 };
 
+/// A recipe for widening operations with vector-predication intrinsics.with
+/// explicit vector length (EVL).
+class VPWidenEVLRecipe : public VPWidenRecipe {
+  using VPRecipeWithIRFlags::transferFlags;
+
+public:
+  template <typename IterT>
+  VPWidenEVLRecipe(Instruction &I, iterator_range<IterT> Operands, VPValue &EVL)
+      : VPWidenRecipe(VPDef::VPWidenEVLSC, I, Operands) {
+    addOperand(&EVL);
+  }
+  VPWidenEVLRecipe(VPWidenRecipe *W, VPValue &EVL)
+      : VPWidenEVLRecipe(*W->getUnderlyingInstr(), W->operands(), EVL) {
+    this->transferFlags(*W);
----------------
fhahn wrote:

Is `this->` needed?
```suggestion
    transferFlags(*W);
```

https://github.com/llvm/llvm-project/pull/93854