[llvm] [SLP]Initial compatibility support for shl v, 1 and add v, v (PR #181168)

[Alexey Bataev via llvm-commits]

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@@ -4211,6 +4262,26 @@ class slpvectorizer::BoUpSLP {
       return CopyableElements.contains(V);
     }
 
+    /// Checks if the value \p V is a transformed instruction, compatible either
+    /// with main or alternate ops.
+    bool isExpandedBinOp(Value *V) const {
+      assert(hasState() && "InstructionsState is invalid.");
+      if (isCopyableElement(V))
+        return false;
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alexey-bataev wrote:

These functions are a bit different and may define different values as copyables (like, ones compatible, but with different parent basic block), so need to keep this check for the correctness

https://github.com/llvm/llvm-project/pull/181168