[llvm] [ConstraintElim] Simplify `MinMaxIntrinsic` (PR #75306)

[Nikita Popov via llvm-commits]

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@@ -1392,6 +1396,31 @@ static bool checkAndReplaceCondition(
   return false;
 }
 
+static bool checkAndReplaceMinMax(MinMaxIntrinsic *MinMax, ConstraintInfo &Info,
+                                  unsigned NumIn, unsigned NumOut,
+                                  Instruction *ContextInst, DominatorTree &DT,
+                                  SmallVectorImpl<Instruction *> &ToRemove) {
+  auto ReplaceMinMaxWithOperand = [&](MinMaxIntrinsic *MinMax, bool UseLHS) {
+    // TODO: generate reproducer for min/max.
+    MinMax->replaceAllUsesWith(MinMax->getOperand(UseLHS ? 0 : 1));
+    if (MinMax->use_empty())
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nikic wrote:

This check is redundant.

https://github.com/llvm/llvm-project/pull/75306