[llvm] [Reassociate] Distribute multiply over add to enable factorization (PR #178201)

[Yingwei Zheng via llvm-commits]

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@@ -1603,7 +1683,10 @@ Value *ReassociatePass::OptimizeAdd(Instruction *I,
         continue;
 
       unsigned Occ = ++FactorOccurrences[Factor];
-      if (Occ > MaxOcc) {
+      if (Occ > MaxOcc ||
+          (Occ == MaxOcc &&
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dtcxzyw wrote:

I'd like to add a lambda helper for the updating logic and leave a comment describing the motivation.


https://github.com/llvm/llvm-project/pull/178201