[MLIR] Apply clang-tidy fixes for performance-unnecessary-value-param in ScalableValueBoundsConstraintSet.cpp (NFC)

Author: joker-eph

mlir/include/mlir/Dialect/Vector/IR/ScalableValueBoundsConstraintSet.h

@@ -72,7 +72,7 @@ struct ScalableValueBoundsConstraintSet
   computeScalableBound(Value value, std::optional<int64_t> dim,
                        unsigned vscaleMin, unsigned vscaleMax,
                        presburger::BoundType boundType, bool closedUB = true,
-                       StopConditionFn stopCondition = nullptr);
+                       const StopConditionFn &stopCondition = nullptr);
 
   /// Get the value of vscale. Returns `nullptr` vscale as not been encountered.
   Value getVscaleValue() const { return vscale; }

mlir/lib/Dialect/Vector/IR/ScalableValueBoundsConstraintSet.cpp

@@ -43,7 +43,7 @@ FailureOr<ConstantOrScalableBound>
 ScalableValueBoundsConstraintSet::computeScalableBound(
     Value value, std::optional<int64_t> dim, unsigned vscaleMin,
     unsigned vscaleMax, presburger::BoundType boundType, bool closedUB,
-    StopConditionFn stopCondition) {
+    const StopConditionFn &stopCondition) {
   using namespace presburger;
   assert(vscaleMin <= vscaleMax);