[llvm] [VPlan] Replace VPRecipeOrVPValue with VP2VP recipe simplification. (PR #76090)

[via llvm-commits]

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@@ -8292,13 +8271,13 @@ VPRecipeOrVPValueTy VPRecipeBuilder::tryToBlend(PHINode *Phi,
   for (unsigned In = 0; In < NumIncoming; In++) {
     VPValue *EdgeMask =
         createEdgeMask(Phi->getIncomingBlock(In), Phi->getParent(), *Plan);
-    assert((EdgeMask || NumIncoming == 1) &&
+    assert((EdgeMask || NumIncoming == 1 || Operands[In] == Operands[0]) &&
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ayalz wrote:

A full mask is allowed when multiple predecessors are involved, provided all are with the same operand?

https://github.com/llvm/llvm-project/pull/76090