[llvm] InstCombine: fold(select C, (X | A), X) | B into X | select C, (A | B), B. (#154246) (PR #154267)

[Yingwei Zheng via llvm-commits]

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@@ -2695,6 +2695,40 @@ Instruction *InstCombinerImpl::visitAnd(BinaryOperator &I) {
   if (Instruction *FoldedLogic = foldBinOpIntoSelectOrPhi(I))
     return FoldedLogic;
 
+  // Factor a common operand across select feeding an 'or':
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dtcxzyw wrote:

Any reason for duplicating the code in visitAnd?


https://github.com/llvm/llvm-project/pull/154267