[llvm] [InstCombine] Reassociate commutative binops over select/phi/minmax (PR #187493)

[Yingwei Zheng via llvm-commits]

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@@ -607,6 +622,20 @@ bool InstCombinerImpl::SimplifyAssociativeOrCommutative(BinaryOperator &I) {
         Value *B = Op1->getOperand(0);
         Value *C = Op1->getOperand(1);
 
+        // Form "B op V" when "C op A" is a symmetric pair.
+        if (Op1->hasOneUse()) {
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dtcxzyw wrote:

I guess we can extract a lambda helper to reduce code duplication.



https://github.com/llvm/llvm-project/pull/187493