[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();
+    auto *R = new VPWidenEVLRecipe(*getUnderlyingInstr(),
+                                   make_range(Ops.begin(), Ops.end()), *EVL);
+    R->transferFlags(*this);
+    return R;
+  }
+
+  VP_CLASSOF_IMPL(VPDef::VPWidenEVLSC);
+
+  VPValue *getEVL() { return getOperand(getNumOperands() - 1); }
+  const VPValue *getEVL() const { return getOperand(getNumOperands() - 1); }
+
+  /// A helper function to create widen EVL recipe from regular widen recipe.
+  static VPWidenEVLRecipe *create(VPWidenRecipe *W, VPValue &EVL);
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nikolaypanchenko wrote:

Not sure I understand. There is `VPWidenEVLRecipe(Instruction &I, iterator_range<IterT> Operands, VPValue &EVL)` ctor defined above

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