diff --git a/flang/include/flang/Optimizer/Builder/Character.h b/flang/include/flang/Optimizer/Builder/Character.h
--- a/flang/include/flang/Optimizer/Builder/Character.h
+++ b/flang/include/flang/Optimizer/Builder/Character.h
@@ -66,6 +66,16 @@
   fir::CharBoxValue createConcatenate(const fir::CharBoxValue &lhs,
                                       const fir::CharBoxValue &rhs);
 
+  /// Create {max,min}(lhs,rhs) in temp obtained with fir.alloca
+  /// TODO: delete this. `createCharExtremum2` is the better solution
+  fir::CharBoxValue createCharExtremum(bool predIsMin,
+                                       const fir::CharBoxValue &lhs,
+                                       const fir::CharBoxValue &rhs);
+  /// Create {max,min}(lhs,rhs) in temp obtained with fir.alloca
+  fir::CharBoxValue
+  createCharExtremum2(bool predIsMin,
+                      const std::vector<fir::ExtendedValue> &opExvs);
+
   /// LEN_TRIM intrinsic.
   mlir::Value createLenTrim(const fir::CharBoxValue &str);
 
diff --git a/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt b/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
--- a/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
+++ b/flang/include/flang/Optimizer/HLFIR/CMakeLists.txt
@@ -5,6 +5,8 @@
 mlir_tablegen(HLFIRDialect.cpp.inc -gen-dialect-defs -dialect=hlfir)
 mlir_tablegen(HLFIRAttributes.h.inc -gen-attrdef-decls -attrdefs-dialect=hlfir)
 mlir_tablegen(HLFIRAttributes.cpp.inc -gen-attrdef-defs -attrdefs-dialect=hlfir)
+mlir_tablegen(HLFIREnums.h.inc -gen-enum-decls)
+mlir_tablegen(HLFIREnums.cpp.inc -gen-enum-defs)
 
 set(LLVM_TARGET_DEFINITIONS HLFIROps.td)
 mlir_tablegen(HLFIROpInterfaces.h.inc -gen-op-interface-decls)
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h b/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
--- a/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIRDialect.h
@@ -26,6 +26,8 @@
 
 #include "flang/Optimizer/HLFIR/HLFIRDialect.h.inc"
 
+#include "flang/Optimizer/HLFIR/HLFIREnums.h.inc"
+
 #define GET_TYPEDEF_CLASSES
 #include "flang/Optimizer/HLFIR/HLFIRTypes.h.inc"
 
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td b/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
--- a/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td
@@ -15,6 +15,7 @@
 #define FORTRAN_DIALECT_HLFIR_OP_BASE
 
 include "mlir/IR/AttrTypeBase.td"
+include "mlir/IR/EnumAttr.td"
 include "mlir/IR/OpBase.td"
 include "flang/Optimizer/Dialect/FIRTypes.td"
 
@@ -133,4 +134,12 @@
 def AnyFortranLogicalOrI1ArrayObject : Type<IsMaskArgumentPred,
     "A scalar i1 or logical or an array-like object containing logicals">;
 
+def hlfir_CharExtremumPredicateAttr : I32EnumAttr<
+    "CharExtremumPredicate", "",
+    [
+      I32EnumAttrCase<"min", 0>,
+      I32EnumAttrCase<"max", 1>
+    ]> {
+  let cppNamespace = "hlfir";
+}
 #endif // FORTRAN_DIALECT_HLFIR_OP_BASE
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
--- a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
@@ -1303,4 +1303,28 @@
   let hasCanonicalizeMethod = 1;
 }
 
+def hlfir_CharExtremumOp : hlfir_Op<"char_extremum", []> {
+  let summary = "Find max/min from given character strings";
+  let description = [{
+    Find the minimum or maximum of two or more character strings of a same character kind and return the string with the minimum or maximum number of characters. Example:
+
+    %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+  }];
+
+  let arguments = (ins hlfir_CharExtremumPredicateAttr:$predicate,
+                  Variadic<AnyScalarCharacterEntity>:$strings
+  );
+
+  let results = (outs AnyScalarCharacterExpr);
+
+  let assemblyFormat = [{
+    $predicate `,` $strings attr-dict `:` functional-type(operands, results)
+  }];
+
+  let builders = [OpBuilder<(ins "hlfir::CharExtremumPredicate":$predicate, "mlir::ValueRange":$strings)>];
+
+  let hasVerifier = 1;
+}
+
+
 #endif // FORTRAN_DIALECT_HLFIR_OPS
diff --git a/flang/lib/Lower/ConvertCall.cpp b/flang/lib/Lower/ConvertCall.cpp
--- a/flang/lib/Lower/ConvertCall.cpp
+++ b/flang/lib/Lower/ConvertCall.cpp
@@ -1311,13 +1311,18 @@
       hlfir::Entity actual = arg->getOriginalActual();
       mlir::Value valArg;
 
-      fir::ArgLoweringRule argRules =
-          fir::lowerIntrinsicArgumentAs(*argLowering, i);
-      if (!argRules.handleDynamicOptional &&
-          argRules.lowerAs != fir::LowerIntrinsicArgAs::Inquired)
-        valArg = hlfir::derefPointersAndAllocatables(loc, builder, actual);
-      else
-        valArg = actual.getBase();
+      // if intrinsic handler has no lowering rules
+      if (!argLowering) {
+        valArg = hlfir::loadTrivialScalar(loc, builder, actual);
+      } else {
+        fir::ArgLoweringRule argRules =
+            fir::lowerIntrinsicArgumentAs(*argLowering, i);
+        if (!argRules.handleDynamicOptional &&
+            argRules.lowerAs != fir::LowerIntrinsicArgAs::Inquired)
+          valArg = hlfir::derefPointersAndAllocatables(loc, builder, actual);
+        else
+          valArg = actual.getBase();
+      }
 
       operands.emplace_back(valArg);
     }
@@ -1411,6 +1416,21 @@
     return {hlfir::EntityWithAttributes{transposeOp.getResult()}};
   }
 
+  if ((intrinsicName == "min" || intrinsicName == "max") &&
+      hlfir::getFortranElementType(callContext.resultType.value())
+          .isa<fir::CharacterType>()) {
+    llvm::SmallVector<mlir::Value> operands = getOperandVector(loweredActuals);
+    assert(operands.size() >= 2);
+
+    hlfir::CharExtremumPredicate pred = (intrinsicName == "min")
+                                            ? hlfir::CharExtremumPredicate::min
+                                            : hlfir::CharExtremumPredicate::max;
+    hlfir::CharExtremumOp charExtremumOp =
+        builder.create<hlfir::CharExtremumOp>(loc, pred,
+                                              mlir::ValueRange{operands});
+    return {hlfir::EntityWithAttributes{charExtremumOp.getResult()}};
+  }
+
   // TODO add hlfir operations for other transformational intrinsics here
 
   // fallback to calling the intrinsic via fir.call
diff --git a/flang/lib/Optimizer/Builder/Character.cpp b/flang/lib/Optimizer/Builder/Character.cpp
--- a/flang/lib/Optimizer/Builder/Character.cpp
+++ b/flang/lib/Optimizer/Builder/Character.cpp
@@ -784,3 +784,94 @@
   mlir::Type lenType = mlir::IntegerType::get(context, 64);
   return mlir::TupleType::get(context, {funcPointerType, lenType});
 }
+
+// TODO: remove this. `createCharExtremum2` is the better solution.
+fir::CharBoxValue fir::factory::CharacterExprHelper::createCharExtremum(
+    bool predIsMin, const fir::CharBoxValue &lhs,
+    const fir::CharBoxValue &rhs) {
+  auto lhsLen = builder.createConvert(loc, builder.getCharacterLengthType(),
+                                      lhs.getLen());
+  auto rhsLen = builder.createConvert(loc, builder.getCharacterLengthType(),
+                                      rhs.getLen());
+  mlir::Value lhsBigger = builder.create<mlir::arith::CmpIOp>(
+      loc, mlir::arith::CmpIPredicate::ugt, lhsLen, rhsLen);
+  mlir::Value lhsCBB = getCharBoxBuffer(lhs);
+  mlir::Value rhsCBB = getCharBoxBuffer(rhs);
+  mlir::Value biggestChar =
+      builder.create<mlir::arith::SelectOp>(loc, lhsBigger, lhsCBB, rhsCBB);
+  mlir::Value biggestLen =
+      builder.create<mlir::arith::SelectOp>(loc, lhsBigger, lhsLen, rhsLen);
+  auto temp = createCharacterTemp(biggestChar.getType(), biggestLen);
+  auto lowerBound =
+      builder.createIntegerConstant(loc, builder.getIndexType(), 0);
+  auto one = builder.createIntegerConstant(loc, biggestLen.getType(), 1);
+  auto upperBound = builder.create<mlir::arith::SubIOp>(loc, biggestLen, one);
+  mlir::Value fromBuff = predIsMin ? builder.create<mlir::arith::SelectOp>(
+                                         loc, lhsBigger, rhsCBB, lhsCBB)
+                                   : biggestChar;
+  auto toBuff = getCharBoxBuffer(temp);
+  fir::factory::DoLoopHelper{builder, loc}.createLoop(
+      lowerBound, upperBound, one,
+      [&](fir::FirOpBuilder &bldr, mlir::Value index) {
+        auto charVal = createLoadCharAt(fromBuff, index);
+        createStoreCharAt(toBuff, index, charVal);
+      });
+  return temp;
+}
+
+fir::CharBoxValue fir::factory::CharacterExprHelper::createCharExtremum2(
+    bool predIsMin, const std::vector<fir::ExtendedValue> &opExvs) {
+
+  auto resultChar = *opExvs[0].getCharBox();
+
+  auto typeLen = fir::CharacterType::unknownLen();
+  auto kind = recoverCharacterType(resultChar.getBuffer().getType()).getFKind();
+  auto charTy = fir::CharacterType::get(builder.getContext(), kind, typeLen);
+  auto type = fir::ReferenceType::get(charTy);
+  auto buffer = builder.createConvert(loc, type, resultChar.getBuffer());
+  fir::CharBoxValue castedResultCBV{buffer, resultChar.getLen()};
+
+  mlir::Value resultCharCBB = getCharBoxBuffer(castedResultCBV);
+  mlir::Value biggestLen =
+      builder.createConvert(loc, builder.getCharacterLengthType(),
+                            (*opExvs[0].getCharBox()).getLen());
+  mlir::Value smallestLen = biggestLen;
+
+  for (size_t i = 1; i < opExvs.size(); ++i) {
+    auto compareChar = *opExvs[i].getCharBox();
+    auto castedBuffer =
+        builder.createConvert(loc, type, compareChar.getBuffer());
+    fir::CharBoxValue castedCompareCBV{castedBuffer, compareChar.getLen()};
+    auto compareCharCBB = getCharBoxBuffer(castedCompareCBV);
+    auto compareCharLen = builder.createConvert(
+        loc, builder.getCharacterLengthType(), compareChar.getLen());
+
+    mlir::Value lhsBigger = builder.create<mlir::arith::CmpIOp>(
+        loc, mlir::arith::CmpIPredicate::uge, biggestLen, compareCharLen);
+    biggestLen = builder.create<mlir::arith::SelectOp>(
+        loc, lhsBigger, biggestLen, compareCharLen);
+
+    if (predIsMin) {
+      auto lhsSmaller = builder.create<mlir::arith::CmpIOp>(
+          loc, mlir::arith::CmpIPredicate::ult, smallestLen, compareCharLen);
+      resultCharCBB = builder.create<mlir::arith::SelectOp>(
+          loc, lhsSmaller, resultCharCBB, compareCharCBB);
+    } else
+      resultCharCBB = builder.create<mlir::arith::SelectOp>(
+          loc, lhsBigger, resultCharCBB, compareCharCBB);
+  }
+  auto resultLen = predIsMin ? smallestLen : biggestLen;
+  auto temp = createCharacterTemp(resultCharCBB.getType(), biggestLen);
+  auto lowerBound =
+      builder.createIntegerConstant(loc, builder.getIndexType(), 0);
+  auto one = builder.createIntegerConstant(loc, biggestLen.getType(), 1);
+  auto upperBound = builder.create<mlir::arith::SubIOp>(loc, resultLen, one);
+  auto toBuff = getCharBoxBuffer(temp);
+  fir::factory::DoLoopHelper{builder, loc}.createLoop(
+      lowerBound, upperBound, one,
+      [&](fir::FirOpBuilder &bldr, mlir::Value index) {
+        auto charVal = createLoadCharAt(resultCharCBB, index);
+        createStoreCharAt(toBuff, index, charVal);
+      });
+  return temp;
+}
diff --git a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
--- a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
+++ b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
@@ -1266,6 +1266,44 @@
   return mlir::failure();
 }
 
+//===----------------------------------------------------------------------===//
+// CharExtremumOp
+//===----------------------------------------------------------------------===//
+
+mlir::LogicalResult hlfir::CharExtremumOp::verify() {
+  if (getStrings().size() < 2)
+    return emitOpError("must be provided at least two string operands");
+  unsigned kind = getCharacterKind(getResult().getType());
+  for (auto string : getStrings())
+    if (kind != getCharacterKind(string.getType()))
+      return emitOpError("strings must have the same KIND as the result type");
+  return mlir::success();
+}
+
+void hlfir::CharExtremumOp::build(mlir::OpBuilder &builder,
+                                  mlir::OperationState &result,
+                                  hlfir::CharExtremumPredicate predicate,
+                                  mlir::ValueRange strings) {
+
+  fir::CharacterType::LenType resultTypeLen = 0;
+  assert(!strings.empty() && "must contain operands");
+  unsigned kind = getCharacterKind(strings[0].getType());
+  for (auto string : strings)
+    if (auto cstLen = getCharacterLengthIfStatic(string.getType())) {
+      resultTypeLen = std::max(resultTypeLen, *cstLen);
+    } else {
+      resultTypeLen = fir::CharacterType::unknownLen();
+      break;
+    }
+  auto resultType = hlfir::ExprType::get(
+      builder.getContext(), hlfir::ExprType::Shape{},
+      fir::CharacterType::get(builder.getContext(), kind, resultTypeLen),
+      false);
+
+  build(builder, result, resultType, predicate, strings);
+}
+
 #include "flang/Optimizer/HLFIR/HLFIROpInterfaces.cpp.inc"
 #define GET_OP_CLASSES
-#include "flang/Optimizer/HLFIR/HLFIROps.cpp.inc"
+#include "flang/Optimizer/HLFIR/HLFIREnums.cpp.inc"
+#include "flang/Optimizer/HLFIR/HLFIROps.cpp.inc"
\ No newline at end of file
diff --git a/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp b/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
--- a/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
+++ b/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
@@ -554,6 +554,103 @@
     return mlir::success();
   }
 };
+struct CharExtremumOpConversion
+    : public mlir::OpConversionPattern<hlfir::CharExtremumOp> {
+  using mlir::OpConversionPattern<hlfir::CharExtremumOp>::OpConversionPattern;
+  explicit CharExtremumOpConversion(mlir::MLIRContext *ctx)
+      : mlir::OpConversionPattern<hlfir::CharExtremumOp>{ctx} {}
+  // TODO: remove this. this was for use with `createCharExtremum`
+  /*mlir::LogicalResult
+  matchAndRewrite(hlfir::CharExtremumOp char_extremum, OpAdaptor adaptor,
+                  mlir::ConversionPatternRewriter &rewriter) const override {
+    mlir::Location loc = char_extremum->getLoc();
+    auto module = char_extremum->getParentOfType<mlir::ModuleOp>();
+    auto predicate = char_extremum.getPredicate();
+    bool predIsMin =
+        predicate == hlfir::CharExtremumPredicate::min ? true : false;
+    fir::FirOpBuilder builder(rewriter, fir::getKindMapping(module));
+    assert(adaptor.getStrings().size() >= 2 &&
+           "must have at least two strings operands");
+    // It seems like we should be able to handle variadic args with a little
+    // more effort. For feedback though, see what folks think for the case where
+    // it's just 2 args.
+    if (adaptor.getStrings().size() > 2)
+      TODO(loc, "codegen of optimized chained char_extremum of more than two "
+                "strings");
+    hlfir::Entity lhs = getBufferizedExprStorage(adaptor.getStrings()[0]);
+    hlfir::Entity rhs = getBufferizedExprStorage(adaptor.getStrings()[1]);
+    auto [lhsExv, c1] = hlfir::translateToExtendedValue(loc, builder, lhs);
+    auto [rhsExv, c2] = hlfir::translateToExtendedValue(loc, builder, rhs);
+    assert(!c1 && !c2 && "expected variables");
+    // things are different here! `createConcatenate` drives the bus
+    fir::ExtendedValue res =
+        fir::factory::CharacterExprHelper{builder, loc}.createCharExtremum(
+            predIsMin, *lhsExv.getCharBox(), *rhsExv.getCharBox());
+    // Ensure the memory type is the same as the result type.
+    mlir::Type addrType = fir::ReferenceType::get(
+        hlfir::getFortranElementType(char_extremum.getResult().getType()));
+    mlir::Value cast = builder.createConvert(loc, addrType, fir::getBase(res));
+    res = fir::substBase(res, cast);
+    hlfir::Entity hlfirTempRes =
+        hlfir::Entity{hlfir::genDeclare(loc, builder, res, "tmp",
+                                        fir::FortranVariableFlagsAttr{})
+                          .getBase()};
+    mlir::Value bufferizedExpr =
+        packageBufferizedExpr(loc, builder, hlfirTempRes, false);
+    rewriter.replaceOp(char_extremum, bufferizedExpr);
+    return mlir::success();
+  }*/
+  mlir::LogicalResult
+  matchAndRewrite(hlfir::CharExtremumOp char_extremum, OpAdaptor adaptor,
+                  mlir::ConversionPatternRewriter &rewriter) const override {
+    mlir::Location loc = char_extremum->getLoc();
+    auto module = char_extremum->getParentOfType<mlir::ModuleOp>();
+    auto predicate = char_extremum.getPredicate();
+    bool predIsMin =
+        predicate == hlfir::CharExtremumPredicate::min ? true : false;
+    fir::FirOpBuilder builder(rewriter, fir::getKindMapping(module));
+    assert(adaptor.getStrings().size() >= 2 &&
+           "must have at least two strings operands");
+    // It seems like we should be able to handle variadic args with a little
+    // more effort. For feedback though, see what folks think for the case where
+    // it's just 2 args.
+    // if (adaptor.getStrings().size() > 2)
+    //  TODO(loc, "codegen of optimized chained char_extremum of more than two "
+    //            "strings");
+
+    std::vector<fir::ExtendedValue> /*mlir::ValueRange*/ opExvs(
+        adaptor.getStrings().size());
+    for (size_t i = 0; i < adaptor.getStrings().size(); ++i) {
+      // auto [charExv, c] = getBufferizedExprStorage(adaptor.getStrings()[i]);
+      hlfir::Entity currChar =
+          getBufferizedExprStorage(adaptor.getStrings()[i]);
+      auto [currCharExv, c] =
+          hlfir::translateToExtendedValue(loc, builder, currChar);
+      assert(!c && "expected variables");
+      opExvs[i] = currCharExv;
+    }
+    // at this point, you should have all the strings converted to
+    // fir::ExtendedValues
+    //
+
+    fir::ExtendedValue res =
+        fir::factory::CharacterExprHelper{builder, loc}.createCharExtremum2(
+            predIsMin, opExvs);
+    // Ensure the memory type is the same as the result type.
+    mlir::Type addrType = fir::ReferenceType::get(
+        hlfir::getFortranElementType(char_extremum.getResult().getType()));
+    mlir::Value cast = builder.createConvert(loc, addrType, fir::getBase(res));
+    res = fir::substBase(res, cast);
+    hlfir::Entity hlfirTempRes =
+        hlfir::Entity{hlfir::genDeclare(loc, builder, res, "tmp",
+                                        fir::FortranVariableFlagsAttr{})
+                          .getBase()};
+    mlir::Value bufferizedExpr =
+        packageBufferizedExpr(loc, builder, hlfirTempRes, false);
+    rewriter.replaceOp(char_extremum, bufferizedExpr);
+    return mlir::success();
+  }
+};
 
 class BufferizeHLFIR : public hlfir::impl::BufferizeHLFIRBase<BufferizeHLFIR> {
 public:
@@ -568,11 +665,12 @@
     auto module = this->getOperation();
     auto *context = &getContext();
     mlir::RewritePatternSet patterns(context);
-    patterns.insert<ApplyOpConversion, AsExprOpConversion, AssignOpConversion,
-                    AssociateOpConversion, ConcatOpConversion,
-                    DestroyOpConversion, ElementalOpConversion,
-                    EndAssociateOpConversion, NoReassocOpConversion,
-                    SetLengthOpConversion, ShapeOfOpConversion>(context);
+    patterns
+        .insert<ApplyOpConversion, AsExprOpConversion, AssignOpConversion,
+                AssociateOpConversion, CharExtremumOpConversion,
+                ConcatOpConversion, DestroyOpConversion, ElementalOpConversion,
+                EndAssociateOpConversion, NoReassocOpConversion,
+                SetLengthOpConversion, ShapeOfOpConversion>(context);
     mlir::ConversionTarget target(*context);
     // Note that YieldElementOp is not marked as an illegal operation.
     // It must be erased by its parent converter and there is no explicit
diff --git a/flang/test/HLFIR/char_extremum-bufferization.fir b/flang/test/HLFIR/char_extremum-bufferization.fir
new file mode 100644
--- /dev/null
+++ b/flang/test/HLFIR/char_extremum-bufferization.fir
@@ -0,0 +1,366 @@
+// Test hlfir.concat operation lowering to operations operating on memory.
+
+// RUN: fir-opt %s -bufferize-hlfir | FileCheck %s
+// XFAIL: *
+
+func.func @_QPmax1(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmax1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmax1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmax1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %6 = hlfir.char_extremum max, %3#0, %5#0 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  hlfir.assign %6 to %1#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+  hlfir.destroy %6 : !hlfir.expr<!fir.char<1,?>>
+  return
+}
+
+// func.func @_QPmax1(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmax1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmax1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmax1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %6 = arith.cmpi uge, %2#1, %4#1 : index
+//   %7 = arith.select %6, %2#1, %4#1 : index
+//   %8 = arith.select %6, %3#1, %5#1 : !fir.ref<!fir.char<1,?>>
+//   %9 = fir.alloca !fir.char<1,?>(%7 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1 = arith.constant 1 : index
+//   %10 = arith.subi %7, %c1 : index
+//   fir.do_loop %arg3 = %c0 to %10 step %c1 {
+//     %15 = fir.convert %8 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %16 = fir.coordinate_of %15, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %17 = fir.load %16 : !fir.ref<!fir.char<1>>
+//     %18 = fir.convert %9 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %19 = fir.coordinate_of %18, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %17 to %19 : !fir.ref<!fir.char<1>>
+//   }
+//   %11:2 = hlfir.declare %9 typeparams %7 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %false = arith.constant false
+//   %12 = fir.undefined tuple<!fir.boxchar<1>, i1>
+//   %13 = fir.insert_value %12, %false, [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+//   %14 = fir.insert_value %13, %11#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+//   hlfir.assign %11#0 to %1#0 : !fir.boxchar<1>, !fir.boxchar<1>
+//   return
+// }
+
+func.func @_QPmin1(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmin1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmin1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmin1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %6 = hlfir.char_extremum min, %3#0, %5#0 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  hlfir.assign %6 to %1#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+  hlfir.destroy %6 : !hlfir.expr<!fir.char<1,?>>
+  return
+}
+
+// func.func @_QPmin1(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmin1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmin1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmin1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %6 = arith.cmpi uge, %2#1, %4#1 : index
+//   %7 = arith.select %6, %2#1, %4#1 : index
+//   %8 = arith.cmpi ult, %2#1, %4#1 : index
+//   %9 = arith.select %8, %3#1, %5#1 : !fir.ref<!fir.char<1,?>>
+//   %10 = fir.alloca !fir.char<1,?>(%7 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1 = arith.constant 1 : index
+//   %11 = arith.subi %2#1, %c1 : index
+//   fir.do_loop %arg3 = %c0 to %11 step %c1 {
+//     %16 = fir.convert %9 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %17 = fir.coordinate_of %16, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %18 = fir.load %17 : !fir.ref<!fir.char<1>>
+//     %19 = fir.convert %10 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %20 = fir.coordinate_of %19, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %18 to %20 : !fir.ref<!fir.char<1>>
+//   }
+//   %12:2 = hlfir.declare %10 typeparams %7 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %false = arith.constant false
+//   %13 = fir.undefined tuple<!fir.boxchar<1>, i1>
+//   %14 = fir.insert_value %13, %false, [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+//   %15 = fir.insert_value %14, %12#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+//   hlfir.assign %12#0 to %1#0 : !fir.boxchar<1>, !fir.boxchar<1>
+//   return
+// }
+
+func.func @_QPmax2(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1 = fir.convert %0#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+  %c100 = arith.constant 100 : index
+  %2 = fir.shape %c100 : (index) -> !fir.shape<1>
+  %3:2 = hlfir.declare %1(%2) typeparams %0#1 {uniq_name = "_QFmax2Ec1"} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+  %4:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %c10 = arith.constant 10 : index
+  %5 = fir.convert %4#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+  %c100_0 = arith.constant 100 : index
+  %6 = fir.shape %c100_0 : (index) -> !fir.shape<1>
+  %7:2 = hlfir.declare %5(%6) typeparams %c10 {uniq_name = "_QFmax2Ec2"} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+  %8:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %c20 = arith.constant 20 : index
+  %9 = fir.convert %8#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+  %c100_1 = arith.constant 100 : index
+  %10 = fir.shape %c100_1 : (index) -> !fir.shape<1>
+  %11:2 = hlfir.declare %9(%10) typeparams %c20 {uniq_name = "_QFmax2Ec3"} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+  %c1 = arith.constant 1 : index
+  %12 = hlfir.designate %7#0 (%c1)  typeparams %c10 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+  %c1_2 = arith.constant 1 : index
+  %13 = hlfir.designate %11#0 (%c1_2)  typeparams %c20 : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+  %14 = hlfir.char_extremum max, %12, %13 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+  %c1_3 = arith.constant 1 : index
+  %15 = hlfir.designate %3#0 (%c1_3)  typeparams %0#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+  hlfir.assign %14 to %15 : !hlfir.expr<!fir.char<1,20>>, !fir.boxchar<1>
+  hlfir.destroy %14 : !hlfir.expr<!fir.char<1,20>>
+  return
+}
+
+// func.func @_QPmax2(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1 = fir.convert %0#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+//   %c100 = arith.constant 100 : index
+//   %2 = fir.shape %c100 : (index) -> !fir.shape<1>
+//   %3:2 = hlfir.declare %1(%2) typeparams %0#1 {uniq_name = "_QFmax2Ec1"} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+//   %4:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %c10 = arith.constant 10 : index
+//   %5 = fir.convert %4#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+//   %c100_0 = arith.constant 100 : index
+//   %6 = fir.shape %c100_0 : (index) -> !fir.shape<1>
+//   %7:2 = hlfir.declare %5(%6) typeparams %c10 {uniq_name = "_QFmax2Ec2"} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+//   %8:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %c20 = arith.constant 20 : index
+//   %9 = fir.convert %8#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+//   %c100_1 = arith.constant 100 : index
+//   %10 = fir.shape %c100_1 : (index) -> !fir.shape<1>
+//   %11:2 = hlfir.declare %9(%10) typeparams %c20 {uniq_name = "_QFmax2Ec3"} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+//   %c1 = arith.constant 1 : index
+//   %12 = hlfir.designate %7#0 (%c1)  typeparams %c10 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+//   %c1_2 = arith.constant 1 : index
+//   %13 = hlfir.designate %11#0 (%c1_2)  typeparams %c20 : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+//   %14 = fir.convert %12 : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<!fir.char<1,?>>
+//   %15 = fir.convert %13 : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<!fir.char<1,?>>
+//   %16 = arith.cmpi uge, %c10, %c20 : index
+//   %17 = arith.select %16, %c10, %c20 : index
+//   %18 = arith.select %16, %14, %15 : !fir.ref<!fir.char<1,?>>
+//   %19 = fir.alloca !fir.char<1,?>(%17 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1_3 = arith.constant 1 : index
+//   %20 = arith.subi %17, %c1_3 : index
+//   fir.do_loop %arg3 = %c0 to %20 step %c1_3 {
+//     %27 = fir.convert %18 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %28 = fir.coordinate_of %27, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %29 = fir.load %28 : !fir.ref<!fir.char<1>>
+//     %30 = fir.convert %19 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %31 = fir.coordinate_of %30, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %29 to %31 : !fir.ref<!fir.char<1>>
+//   }
+//   %21 = fir.convert %19 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.char<1,20>>
+//   %22:2 = hlfir.declare %21 typeparams %17 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,20>>, index) -> (!fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,20>>)
+//   %false = arith.constant false
+//   %23 = fir.undefined tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %24 = fir.insert_value %23, %false, [1 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, i1) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %25 = fir.insert_value %24, %22#0, [0 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, !fir.ref<!fir.char<1,20>>) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %c1_4 = arith.constant 1 : index
+//   %26 = hlfir.designate %3#0 (%c1_4)  typeparams %0#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+//   hlfir.assign %22#0 to %26 : !fir.ref<!fir.char<1,20>>, !fir.boxchar<1>
+//   return
+// }
+
+func.func @_QPmin2(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1 = fir.convert %0#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+  %c100 = arith.constant 100 : index
+  %2 = fir.shape %c100 : (index) -> !fir.shape<1>
+  %3:2 = hlfir.declare %1(%2) typeparams %0#1 {uniq_name = "_QFmin2Ec1"} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+  %4:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %c10 = arith.constant 10 : index
+  %5 = fir.convert %4#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+  %c100_0 = arith.constant 100 : index
+  %6 = fir.shape %c100_0 : (index) -> !fir.shape<1>
+  %7:2 = hlfir.declare %5(%6) typeparams %c10 {uniq_name = "_QFmin2Ec2"} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+  %8:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %c20 = arith.constant 20 : index
+  %9 = fir.convert %8#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+  %c100_1 = arith.constant 100 : index
+  %10 = fir.shape %c100_1 : (index) -> !fir.shape<1>
+  %11:2 = hlfir.declare %9(%10) typeparams %c20 {uniq_name = "_QFmin2Ec3"} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+  %c1 = arith.constant 1 : index
+  %12 = hlfir.designate %7#0 (%c1)  typeparams %c10 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+  %c1_2 = arith.constant 1 : index
+  %13 = hlfir.designate %11#0 (%c1_2)  typeparams %c20 : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+  %14 = hlfir.char_extremum min, %12, %13 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+  %c1_3 = arith.constant 1 : index
+  %15 = hlfir.designate %3#0 (%c1_3)  typeparams %0#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+  hlfir.assign %14 to %15 : !hlfir.expr<!fir.char<1,20>>, !fir.boxchar<1>
+  hlfir.destroy %14 : !hlfir.expr<!fir.char<1,20>>
+  return
+}
+
+// func.func @_QPmin2(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1 = fir.convert %0#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+//   %c100 = arith.constant 100 : index
+//   %2 = fir.shape %c100 : (index) -> !fir.shape<1>
+//   %3:2 = hlfir.declare %1(%2) typeparams %0#1 {uniq_name = "_QFmin2Ec1"} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+//   %4:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %c10 = arith.constant 10 : index
+//   %5 = fir.convert %4#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+//   %c100_0 = arith.constant 100 : index
+//   %6 = fir.shape %c100_0 : (index) -> !fir.shape<1>
+//   %7:2 = hlfir.declare %5(%6) typeparams %c10 {uniq_name = "_QFmin2Ec2"} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+//   %8:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %c20 = arith.constant 20 : index
+//   %9 = fir.convert %8#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+//   %c100_1 = arith.constant 100 : index
+//   %10 = fir.shape %c100_1 : (index) -> !fir.shape<1>
+//   %11:2 = hlfir.declare %9(%10) typeparams %c20 {uniq_name = "_QFmin2Ec3"} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+//   %c1 = arith.constant 1 : index
+//   %12 = hlfir.designate %7#0 (%c1)  typeparams %c10 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+//   %c1_2 = arith.constant 1 : index
+//   %13 = hlfir.designate %11#0 (%c1_2)  typeparams %c20 : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+//   %14 = fir.convert %12 : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<!fir.char<1,?>>
+//   %15 = fir.convert %13 : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<!fir.char<1,?>>
+//   %16 = arith.cmpi uge, %c10, %c20 : index
+//   %17 = arith.select %16, %c10, %c20 : index
+//   %18 = arith.cmpi ult, %c10, %c20 : index
+//   %19 = arith.select %18, %14, %15 : !fir.ref<!fir.char<1,?>>
+//   %20 = fir.alloca !fir.char<1,?>(%17 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1_3 = arith.constant 1 : index
+//   %21 = arith.subi %c10, %c1_3 : index
+//   fir.do_loop %arg3 = %c0 to %21 step %c1_3 {
+//     %28 = fir.convert %19 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %29 = fir.coordinate_of %28, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %30 = fir.load %29 : !fir.ref<!fir.char<1>>
+//     %31 = fir.convert %20 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %32 = fir.coordinate_of %31, %arg3 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %30 to %32 : !fir.ref<!fir.char<1>>
+//   }
+//   %22 = fir.convert %20 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.char<1,20>>
+//   %23:2 = hlfir.declare %22 typeparams %17 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,20>>, index) -> (!fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,20>>)
+//   %false = arith.constant false
+//   %24 = fir.undefined tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %25 = fir.insert_value %24, %false, [1 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, i1) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %26 = fir.insert_value %25, %23#0, [0 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, !fir.ref<!fir.char<1,20>>) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+//   %c1_4 = arith.constant 1 : index
+//   %27 = hlfir.designate %3#0 (%c1_4)  typeparams %0#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+//   hlfir.assign %23#0 to %27 : !fir.ref<!fir.char<1,20>>, !fir.boxchar<1>
+//   return
+// }
+
+func.func @_QPmax3(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}, %arg3: !fir.boxchar<1> {fir.bindc_name = "c4"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmax3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmax3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmax3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %6:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %7:2 = hlfir.declare %6#0 typeparams %6#1 {uniq_name = "_QFmax3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %8 = hlfir.char_extremum max, %3#0, %5#0, %7#0 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  hlfir.assign %8 to %1#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+  hlfir.destroy %8 : !hlfir.expr<!fir.char<1,?>>
+  return
+}
+
+// func.func @_QPmax3(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}, %arg3: !fir.boxchar<1> {fir.bindc_name = "c4"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmax3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmax3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmax3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %6:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %7:2 = hlfir.declare %6#0 typeparams %6#1 {uniq_name = "_QFmax3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %8 = arith.cmpi uge, %2#1, %4#1 : index
+//   %9 = arith.select %8, %2#1, %4#1 : index
+//   %10 = arith.select %8, %3#1, %5#1 : !fir.ref<!fir.char<1,?>>
+//   %11 = arith.cmpi uge, %9, %6#1 : index
+//   %12 = arith.select %11, %9, %6#1 : index
+//   %13 = arith.select %11, %10, %7#1 : !fir.ref<!fir.char<1,?>>
+//   %14 = fir.alloca !fir.char<1,?>(%12 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1 = arith.constant 1 : index
+//   %15 = arith.subi %12, %c1 : index
+//   fir.do_loop %arg4 = %c0 to %15 step %c1 {
+//     %20 = fir.convert %13 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %21 = fir.coordinate_of %20, %arg4 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %22 = fir.load %21 : !fir.ref<!fir.char<1>>
+//     %23 = fir.convert %14 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %24 = fir.coordinate_of %23, %arg4 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %22 to %24 : !fir.ref<!fir.char<1>>
+//   }
+//   %16:2 = hlfir.declare %14 typeparams %12 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %false = arith.constant false
+//   %17 = fir.undefined tuple<!fir.boxchar<1>, i1>
+//   %18 = fir.insert_value %17, %false, [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+//   %19 = fir.insert_value %18, %16#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+//   hlfir.assign %16#0 to %1#0 : !fir.boxchar<1>, !fir.boxchar<1>
+//   return
+// }
+
+func.func @_QPmin3(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}, %arg3: !fir.boxchar<1> {fir.bindc_name = "c4"}) {
+  %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmin3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmin3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmin3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %6:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  %7:2 = hlfir.declare %6#0 typeparams %6#1 {uniq_name = "_QFmin3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+  %8 = hlfir.char_extremum min, %3#0, %5#0, %7#0 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  hlfir.assign %8 to %1#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+  hlfir.destroy %8 : !hlfir.expr<!fir.char<1,?>>
+  return
+}
+
+// func.func @_QPmin3(%arg0: !fir.boxchar<1> {fir.bindc_name = "c1"}, %arg1: !fir.boxchar<1> {fir.bindc_name = "c2"}, %arg2: !fir.boxchar<1> {fir.bindc_name = "c3"}, %arg3: !fir.boxchar<1> {fir.bindc_name = "c4"}) {
+//   %0:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %1:2 = hlfir.declare %0#0 typeparams %0#1 {uniq_name = "_QFmin3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %2:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %3:2 = hlfir.declare %2#0 typeparams %2#1 {uniq_name = "_QFmin3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %4:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %5:2 = hlfir.declare %4#0 typeparams %4#1 {uniq_name = "_QFmin3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %6:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+//   %7:2 = hlfir.declare %6#0 typeparams %6#1 {uniq_name = "_QFmin3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %8 = arith.cmpi uge, %2#1, %4#1 : index
+//   %9 = arith.select %8, %2#1, %4#1 : index
+//   %10 = arith.cmpi ult, %2#1, %4#1 : index
+//   %11 = arith.select %10, %3#1, %5#1 : !fir.ref<!fir.char<1,?>>
+//   %12 = arith.cmpi uge, %9, %6#1 : index
+//   %13 = arith.select %12, %9, %6#1 : index
+//   %14 = arith.cmpi ult, %2#1, %6#1 : index
+//   %15 = arith.select %14, %11, %7#1 : !fir.ref<!fir.char<1,?>>
+//   %16 = fir.alloca !fir.char<1,?>(%13 : index) {bindc_name = ".chrtmp"}
+//   %c0 = arith.constant 0 : index
+//   %c1 = arith.constant 1 : index
+//   %17 = arith.subi %2#1, %c1 : index
+//   fir.do_loop %arg4 = %c0 to %17 step %c1 {
+//     %22 = fir.convert %15 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %23 = fir.coordinate_of %22, %arg4 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     %24 = fir.load %23 : !fir.ref<!fir.char<1>>
+//     %25 = fir.convert %16 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+//     %26 = fir.coordinate_of %25, %arg4 : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+//     fir.store %24 to %26 : !fir.ref<!fir.char<1>>
+//   }
+//   %18:2 = hlfir.declare %16 typeparams %13 {uniq_name = "tmp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+//   %false = arith.constant false
+//   %19 = fir.undefined tuple<!fir.boxchar<1>, i1>
+//   %20 = fir.insert_value %19, %false, [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+//   %21 = fir.insert_value %20, %18#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+//   hlfir.assign %18#0 to %1#0 : !fir.boxchar<1>, !fir.boxchar<1>
+//   return
+// }
+
+
+
+
+
+
diff --git a/flang/test/HLFIR/char_extremum.fir b/flang/test/HLFIR/char_extremum.fir
new file mode 100644
--- /dev/null
+++ b/flang/test/HLFIR/char_extremum.fir
@@ -0,0 +1,130 @@
+// Test hlfir.char_extremum operation parse, verify (no errors), and unparse.
+
+// RUN: fir-opt %s | fir-opt | FileCheck %s
+
+
+// variable check
+func.func @char_extremum_min_var(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_min_var(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_var(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>) { 
+%0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_max_var(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+
+func.func @char_extremum_min_var_variadic(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>, %arg2: !fir.ref<!fir.char<1,30>>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_min_var_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:.*]]: !fir.ref<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_var_variadic(%arg0: !fir.ref<!fir.char<1,10>>, %arg1: !fir.ref<!fir.char<1,20>>, %arg2: !fir.ref<!fir.char<1,30>>) { 
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2 : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+  return
+}
+
+// CHECK-LABEL:   func.func @char_extremum_max_var_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.ref<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:.*]]: !fir.ref<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+
+
+// boxchar check
+func.func @char_extremum_min_boxchar(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>) {
+ %0 = hlfir.char_extremum min, %arg0, %arg1 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_boxchar(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_max_boxchar(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>) {
+ %0 = hlfir.char_extremum max, %arg0, %arg1 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_boxchar(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]] : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_min_boxchar_variadic(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>, %arg2: !fir.boxchar<1>, %arg3: !fir.boxchar<1>) { 
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2, %arg3 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_boxchar_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_3:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]], %[[VAL_3]] : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+func.func @char_extremum_max_boxchar_variadic(%arg0: !fir.boxchar<1>, %arg1: !fir.boxchar<1>, %arg2: !fir.boxchar<1>, %arg3: !fir.boxchar<1>) { 
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2, %arg3 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_boxchar_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !fir.boxchar<1>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !fir.boxchar<1>, 
+// CHECK-SAME:    %[[VAL_3:[a-zA-Z0-9_]*]]: !fir.boxchar<1>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]], %[[VAL_3]] : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+
+
+//expr check
+func.func @char_extremum_min_expr(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>) {
+  %0 = hlfir.char_extremum min, %arg0, %arg1 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> (!hlfir.expr<!fir.char<1,10>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_expr(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_expr(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>) {
+  %0 = hlfir.char_extremum max, %arg0, %arg1 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> (!hlfir.expr<!fir.char<1,20>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_expr(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+
+func.func @char_extremum_min_expr_variadic(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>, %arg2: !hlfir.expr<!fir.char<1,30>>) {
+  %0 = hlfir.char_extremum min, %arg0, %arg1, %arg2 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> (!hlfir.expr<!fir.char<1,10>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_min_expr_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum min, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,10>>
+
+func.func @char_extremum_max_expr_variadic(%arg0: !hlfir.expr<!fir.char<1,10>>, %arg1: !hlfir.expr<!fir.char<1,20>>, %arg2: !hlfir.expr<!fir.char<1,30>>) {
+  %0 = hlfir.char_extremum max, %arg0, %arg1, %arg2 : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> (!hlfir.expr<!fir.char<1,30>>)
+  return
+}
+// CHECK-LABEL:   func.func @char_extremum_max_expr_variadic(
+// CHECK-SAME:    %[[VAL_0:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,10>>,
+// CHECK-SAME:    %[[VAL_1:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,20>>,
+// CHECK-SAME:    %[[VAL_2:[a-zA-Z0-9_]*]]: !hlfir.expr<!fir.char<1,30>>) {
+// CHECK:  %{{.*}} = hlfir.char_extremum max, %[[VAL_0]], %[[VAL_1]], %[[VAL_2]] : (!hlfir.expr<!fir.char<1,10>>, !hlfir.expr<!fir.char<1,20>>, !hlfir.expr<!fir.char<1,30>>) -> !hlfir.expr<!fir.char<1,30>>
+
diff --git a/flang/test/Lower/HLFIR/char_extremum.f03 b/flang/test/Lower/HLFIR/char_extremum.f03
new file mode 100644
--- /dev/null
+++ b/flang/test/Lower/HLFIR/char_extremum.f03
@@ -0,0 +1,134 @@
+! Test lowering of the max and min intrinsics on character types to HLFIR
+! RUN: bbc -emit-fir -hlfir -o - %s 2>&1 | FileCheck %s
+
+subroutine max1(c1, c2, c3)
+  character(*) :: c1, c2, c3
+  c1 = max(c2,c3)
+end subroutine
+
+! CHECK-LABEL: func.func @_QPmax1
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]] = hlfir.char_extremum max, %[[VAL_3]]#0, %[[VAL_5]]#0 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+! CHECK:  hlfir.assign %[[VAL_6]] to %[[VAL_1]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_6]] : !hlfir.expr<!fir.char<1,?>>
+
+subroutine min1(c1, c2, c3)
+  character(*) :: c1, c2, c3
+  c1 = min(c2,c3)
+end subroutine
+! CHECK-LABEL: func.func @_QPmin1
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]] = hlfir.char_extremum min, %[[VAL_3]]#0, %[[VAL_5]]#0 : (!fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+! CHECK:  hlfir.assign %[[VAL_6]] to %[[VAL_1]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_6]] : !hlfir.expr<!fir.char<1,?>>
+! CHECK:  return
+
+subroutine max2(c1, c2, c3)
+  character(*) :: c1(100)
+  character :: c2(100)*10, c3(100)*20
+  c1(1) = max(c2(1),c3(1))
+end subroutine
+! CHECK-LABEL:  func.func @_QPmax2
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_0]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+! CHECK:  %[[VAL_C100:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]]  = fir.shape %[[VAL_C100]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_1]](%[[VAL_2]]) typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_C10:[a-zA-Z0-9_]*]] = arith.constant 10 : index
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+! CHECK:  %[[VAL_C100_0:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]] = fir.shape %[[VAL_C100_0]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_7:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_5]](%[[VAL_6]]) typeparams %[[VAL_C10]] {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+! CHECK:  %[[VAL_8:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %{{.*}} : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_C20:[a-zA-Z0-9_]*]] = arith.constant 20 : index
+! CHECK:  %[[VAL_9:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_8]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+! CHECK:  %[[VAL_C100_1:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_10:[a-zA-Z0-9_]*]] = fir.shape %[[VAL_C100_1]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_11:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_9]](%[[VAL_10]]) typeparams %[[VAL_C20]] {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+! CHECK:  %[[VAL_C1:[a-zA-Z0-9_]*]] = arith.constant 1 : index
+! CHECK:  %[[VAL_12:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_7]]#0 (%[[VAL_C1]])  typeparams %[[VAL_C10]] : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+! CHECK:  %[[VAL_C1_2:[a-zA-Z0-9_]*]] = arith.constant 1 : index
+! CHECK:  %[[VAL_13:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_11]]#0 (%[[VAL_C1_2]])  typeparams %[[VAL_C20]] : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+! CHECK:  %[[VAL_14:[a-zA-Z0-9_]*]] = hlfir.char_extremum max, %[[VAL_12]], %[[VAL_13]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+! CHECK:  %c1_3 = arith.constant 1 : index
+! CHECK:  %[[VAL_15:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_3]]#0 (%c1_3)  typeparams %[[VAL_0]]#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+! CHECK:  hlfir.assign %[[VAL_14]] to %[[VAL_15]] : !hlfir.expr<!fir.char<1,20>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_14]] : !hlfir.expr<!fir.char<1,20>>
+
+subroutine min2(c1, c2, c3)
+  character(*) :: c1(100)
+  character :: c2(100)*10, c3(100)*20
+  c1(1) = min(c2(1),c3(1))
+end subroutine
+! CHECK-LABEL: func.func @_QPmin2
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_0]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+! CHECK:  %[[VAL_C100:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]] = fir.shape %[[VAL_C100]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_1]](%[[VAL_2]]) typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,?>>>, !fir.shape<1>, index) -> (!fir.box<!fir.array<100x!fir.char<1,?>>>, !fir.ref<!fir.array<100x!fir.char<1,?>>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_C10:[a-zA-Z0-9_]*]] = arith.constant 10 : index
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+! CHECK:  %[[VAL_C100_0:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]] = fir.shape %[[VAL_C100_0]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_7:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_5]](%[[VAL_6]]) typeparams %[[VAL_C10]] {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,10>>>, !fir.ref<!fir.array<100x!fir.char<1,10>>>)
+! CHECK:  %[[VAL_8:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_C20:[a-zA-Z0-9_]*]] = arith.constant 20 : index
+! CHECK:  %[[VAL_C9:[a-zA-Z0-9_]*]] = fir.convert %[[VAL_8]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+! CHECK:  %[[VAL_C100_1:[a-zA-Z0-9_]*]] = arith.constant 100 : index
+! CHECK:  %[[VAL_10:[a-zA-Z0-9_]*]] = fir.shape %[[VAL_C100_1]] : (index) -> !fir.shape<1>
+! CHECK:  %[[VAL_11:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_C9]](%[[VAL_10]]) typeparams %[[VAL_C20]] {{.*}} : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<100x!fir.char<1,20>>>, !fir.ref<!fir.array<100x!fir.char<1,20>>>)
+! CHECK:  %[[VAL_C1:[a-zA-Z0-9_]*]] = arith.constant 1 : index
+! CHECK:  %[[VAL_12:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_7]]#0 (%[[VAL_C1]])  typeparams %[[VAL_C10]] : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+! CHECK:  %[[VAL_C1_2:[a-zA-Z0-9_]*]] = arith.constant 1 : index
+! CHECK:  %[[VAL_13:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_11]]#0 (%[[VAL_C1_2]])  typeparams %[[VAL_C20]] : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+! CHECK:  %[[VAL_14:[a-zA-Z0-9_]*]] = hlfir.char_extremum min, %[[VAL_12]], %[[VAL_13]] : (!fir.ref<!fir.char<1,10>>, !fir.ref<!fir.char<1,20>>) -> !hlfir.expr<!fir.char<1,20>>
+! CHECK:  %[[VAL_C1_3:[a-zA-Z0-9_]*]] = arith.constant 1 : index
+! CHECK:  %[[VAL_15:[a-zA-Z0-9_]*]] = hlfir.designate %[[VAL_3]]#0 (%[[VAL_C1_3]])  typeparams %[[VAL_0]]#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+! CHECK:  hlfir.assign %[[VAL_14]] to %[[VAL_15]] : !hlfir.expr<!fir.char<1,20>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_14]] : !hlfir.expr<!fir.char<1,20>>
+
+subroutine max3(c1, c2, c3, c4)
+  character(*) :: c1, c2, c3, c4
+  c1 = max(c2, c3, c4)
+end subroutine
+! CHECK-LABEL: func.func @_QPmax3
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_7:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_6]]#0 typeparams %[[VAL_6]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_8:[a-zA-Z0-9_]*]] = hlfir.char_extremum max, %[[VAL_3]]#0, %[[VAL_5]]#0, %[[VAL_7]]#0 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+! CHECK:  hlfir.assign %[[VAL_8]] to %[[VAL_1]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_8]] : !hlfir.expr<!fir.char<1,?>>
+
+subroutine min3(c1, c2, c3, c4)
+  character(*) :: c1, c2, c3, c4
+  c1 = min(c2, c3, c4)
+end subroutine
+! CHECK-LABEL: func.func @_QPmin3
+! CHECK:  %[[VAL_0:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg0 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_1:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_2:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg1 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_3:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_4:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg2 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_5:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_6:[a-zA-Z0-9_]*]]:2 = fir.unboxchar %arg3 : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:  %[[VAL_7:[a-zA-Z0-9_]*]]:2 = hlfir.declare %[[VAL_6]]#0 typeparams %[[VAL_6]]#1 {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+! CHECK:  %[[VAL_8:[a-zA-Z0-9_]*]] = hlfir.char_extremum min, %[[VAL_3]]#0, %[[VAL_5]]#0, %[[VAL_7]]#0 : (!fir.boxchar<1>, !fir.boxchar<1>, !fir.boxchar<1>) -> !hlfir.expr<!fir.char<1,?>>
+! CHECK:  hlfir.assign %[[VAL_8]] to %[[VAL_1]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
+! CHECK:  hlfir.destroy %[[VAL_8]] : !hlfir.expr<!fir.char<1,?>>