[llvm] [SelectOpt] Add handling for Select-like operations. (PR #77284)

[Sotiris Apostolakis via llvm-commits]

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@@ -945,7 +1103,7 @@ bool SelectOptimizeImpl::computeLoopCosts(
     // Cost of the loop's critical path.
     CostInfo &MaxCost = LoopCost[Iter];
     for (BasicBlock *BB : L->getBlocks()) {
-      for (const Instruction &I : *BB) {
+      for (Instruction &I : *BB) {
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sapostolakis wrote:

is removing the const here necessary? 
I assume that the instruction is not modified here when computing the costs.

https://github.com/llvm/llvm-project/pull/77284