[llvm] [InstCombine] fold (Binop phi(a, b) phi(b, a)) -> (Binop a, b) while Binop is commutative. (PR #75765)

[Nikita Popov via llvm-commits]

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@@ -1505,6 +1505,9 @@ Instruction *InstCombinerImpl::visitAdd(BinaryOperator &I) {
     return Sub;
   }
 
+  if (Value *V = SimplifyPhiCommutativeBinaryOp(I, LHS, RHS))
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nikic wrote:

Call this from foldBinopWithPhiOperands() instead of repeating it everywhere?

https://github.com/llvm/llvm-project/pull/75765