[llvm] [VPlan] Separate out logic to manage IR flags to VPIRFlags (NFC). (PR #140621)

[via llvm-commits]

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@@ -851,11 +802,60 @@ class VPRecipeWithIRFlags : public VPSingleDefRecipe {
     return DisjointFlags.IsDisjoint;
   }
 
+#if !defined(NDEBUG)
+  /// Returns true if the set flags are valid for \p Opcode.
+  bool flagsValidForOpcode(unsigned Opcode) const;
+#endif
+
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
   void printFlags(raw_ostream &O) const;
 #endif
 };
 
+/// A pure-virtual common base class for recipes defining a single VPValue and
+/// using IR flags.
+struct VPRecipeWithIRFlags : public VPSingleDefRecipe, public VPIRFlags {
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ayalz wrote:

This retains existing name, but perhaps `VPSingleDefWithIRFlags` would be more accurate, following its documentation above. Or `VPSingleDefWithFlags`, considering IR Flags are wrapped in VPIRFlags (along with condition predicates and potentially other constants).

https://github.com/llvm/llvm-project/pull/140621