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

[Kolya Panchenko via llvm-commits]

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@@ -1363,6 +1370,49 @@ class VPWidenRecipe : public VPRecipeWithIRFlags {
 #endif
 };
 
+class VPWidenEVLRecipe : public VPWidenRecipe {
+private:
+  using VPRecipeWithIRFlags::transferFlags;
+
+public:
+  template <typename IterT>
+  VPWidenEVLRecipe(Instruction &I, iterator_range<IterT> Operands, VPValue &EVL)
+      : VPWidenRecipe(VPDef::VPWidenEVLSC, I, Operands) {
+    addOperand(&EVL);
+  }
+
+  ~VPWidenEVLRecipe() override = default;
+
+  VPWidenRecipe *clone() override final {
+    SmallVector<VPValue *> Ops(operands());
+    VPValue *EVL = Ops.pop_back_val();
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nikolaypanchenko wrote:

The intention is to remove `EVL` operand from `Ops` to be able to reuse `VPWidenEVLRecipe` ctor

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