address review comments

Author: ubfx

mlir/lib/Dialect/Arith/IR/InferIntRangeInterfaceImpls.cpp

@@ -19,7 +19,7 @@ using namespace mlir;
 using namespace mlir::arith;
 using namespace mlir::intrange;
 
-intrange::OverflowFlags
+static intrange::OverflowFlags
 convertArithOverflowFlags(arith::IntegerOverflowFlags flags) {
   intrange::OverflowFlags retFlags = intrange::OverflowFlags::None;
   if (bitEnumContainsAny(flags, arith::IntegerOverflowFlags::nsw))

mlir/lib/Dialect/Index/IR/InferIntRangeInterfaceImpls.cpp

@@ -47,7 +47,7 @@ void BoolConstantOp::inferResultRanges(ArrayRef<ConstantIntRanges> argRanges,
 // Some arithmetic inference functions allow specifying special overflow / wrap
 // behavior. We do not require this for the IndexOps and use this helper to call
 // the inference function without any `OverflowFlags`.
-std::function<ConstantIntRanges(ArrayRef<ConstantIntRanges>)>
+static std::function<ConstantIntRanges(ArrayRef<ConstantIntRanges>)>
 inferWithoutOverflowFlags(InferRangeWithOvfFlagsFn inferWithOvfFn) {
   return [inferWithOvfFn](ArrayRef<ConstantIntRanges> argRanges) {
     return inferWithOvfFn(argRanges, OverflowFlags::None);