[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #106560)

[Ramkumar Ramachandra via llvm-commits]

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@@ -3803,6 +3982,20 @@ class VPlanSlp {
   /// Return true if all visited instruction can be combined.
   bool isCompletelySLP() const { return CompletelySLP; }
 };
+
+namespace vputils {
+
+/// Returns true for PHI-like recipes.
+bool isPhi(const VPRecipeBase &R);
+
+/// Returns true for PHI-like recipes that generate their own backedge
+bool isPhiThatGeneratesBackedge(const VPRecipeBase &R);
+
+/// Returns true for PHI-like recipes that exists in vector loop header basic
+/// block
+bool isHeaderPhi(const VPRecipeBase &R);
+} // end namespace vputils
+
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artagnon wrote:

Kindly move this to VPlanUtils.cpp/.h?

https://github.com/llvm/llvm-project/pull/106560