[llvm] [FuncSpec] Update function specialization to handle phi-chains (PR #71442)

[Momchil Velikov via llvm-commits]

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@@ -262,30 +267,86 @@ Cost InstCostVisitor::estimateBranchInst(BranchInst &I) {
   return estimateBasicBlocks(WorkList);
 }
 
+void InstCostVisitor::discoverStronglyConnectedComponent(PHINode *PN,
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momchil-velikov wrote:

Actually, drop all the mention of SCC across the patch. We are not discovering any SCCs.

https://github.com/llvm/llvm-project/pull/71442