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
@@ -15,6 +15,7 @@
 
 #include "flang/Optimizer/Builder/BoxValue.h"
 #include "flang/Optimizer/Builder/LowLevelIntrinsics.h"
+#include "flang/Optimizer/Builder/Runtime/Character.h"
 
 namespace fir {
 class FirOpBuilder;
@@ -66,6 +67,10 @@
   fir::CharBoxValue createConcatenate(const fir::CharBoxValue &lhs,
                                       const fir::CharBoxValue &rhs);
 
+  /// Create {max,min}(lhs,rhs) in temp obtained with fir.alloca
+  fir::CharBoxValue
+  createCharExtremum(bool predIsMin, llvm::ArrayRef<fir::CharBoxValue> opCBVs);
+
   /// 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"
 
@@ -138,4 +139,12 @@
 def AnyFortranLogicalArrayObject : Type<IsFortranLogicalArrayPred,
     "any 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
@@ -1425,4 +1425,29 @@
   let hasCanonicalizeMethod = 1;
 }
 
+def hlfir_CharExtremumOp : hlfir_Op<"char_extremum", []> {
+  let summary = "Find max/min from given character strings";
+  let description = [{
+    Find the lexicographical minimum or maximum of two or more character 
+    strings of the same character kind and return the string with the lexicographical 
+    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/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 +784,68 @@
   mlir::Type lenType = mlir::IntegerType::get(context, 64);
   return mlir::TupleType::get(context, {funcPointerType, lenType});
 }
+
+fir::CharBoxValue fir::factory::CharacterExprHelper::createCharExtremum(
+    bool predIsMin, llvm::ArrayRef<fir::CharBoxValue> opCBVs) {
+  // inputs: we are given a vector of all of the charboxes of the arguments
+  // passed to hlfir.char_extremum, as well as the predicate for whether we
+  // want llt or lgt
+  //
+  // note: we know that, regardless of whether we're looking at smallest or
+  // largest char, the size of the output buffer will be the same size as the
+  // largest character out of all of the operands. so, we find the biggest
+  // length first. It's okay if these char lengths are not known at compile
+  // time.
+
+  fir::CharBoxValue firstCBV = opCBVs[0];
+  mlir::Value firstBuf = getCharBoxBuffer(firstCBV);
+  auto firstLen = builder.createConvert(loc, builder.getCharacterLengthType(),
+                                        firstCBV.getLen());
+
+  mlir::Value resultBuf = firstBuf;
+  mlir::Value resultLen = firstLen;
+  mlir::Value biggestLen = firstLen;
+
+  // values for casting buf type and len type
+  auto typeLen = fir::CharacterType::unknownLen();
+  auto kind = recoverCharacterType(firstBuf.getType()).getFKind();
+  auto charTy = fir::CharacterType::get(builder.getContext(), kind, typeLen);
+  auto type = fir::ReferenceType::get(charTy);
+
+  size_t numOperands = opCBVs.size();
+  for (size_t cbv_idx = 1; cbv_idx < numOperands; ++cbv_idx) {
+    auto currChar = opCBVs[cbv_idx];
+    auto currBuf = getCharBoxBuffer(currChar);
+    auto currLen = builder.createConvert(loc, builder.getCharacterLengthType(),
+                                         currChar.getLen());
+    // biggest len result
+    mlir::Value lhsBigger = builder.create<mlir::arith::CmpIOp>(
+        loc, mlir::arith::CmpIPredicate::uge, biggestLen, currLen);
+    biggestLen = builder.create<mlir::arith::SelectOp>(loc, lhsBigger,
+                                                       biggestLen, currLen);
+
+    auto cmp = predIsMin ? mlir::arith::CmpIPredicate::slt
+                         : mlir::arith::CmpIPredicate::sgt;
+
+    // lexical compare result
+    mlir::Value resultCmp = fir::runtime::genCharCompare(
+        builder, loc, cmp, currBuf, currLen, resultBuf, resultLen);
+
+    // it's casting (to unknown size) time!
+    resultBuf = builder.createConvert(loc, type, resultBuf);
+    currBuf = builder.createConvert(loc, type, currBuf);
+
+    resultBuf = builder.create<mlir::arith::SelectOp>(loc, resultCmp, currBuf,
+                                                      resultBuf);
+    resultLen = builder.create<mlir::arith::SelectOp>(loc, resultCmp, currLen,
+                                                      resultLen);
+  }
+
+  // now that we know the lexicographically biggest/smallest char and which char
+  // had the biggest len, we can populate a temp CBV and return it
+  fir::CharBoxValue temp = createCharacterTemp(resultBuf.getType(), biggestLen);
+  auto toBuf = temp;
+  fir::CharBoxValue fromBuf{resultBuf, resultLen};
+  createAssign(toBuf, fromBuf);
+  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
@@ -1442,6 +1442,44 @@
   return mlir::success();
 }
 
+//===----------------------------------------------------------------------===//
+// 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/HLFIREnums.cpp.inc"
 #include "flang/Optimizer/HLFIR/HLFIROps.cpp.inc"
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
@@ -591,6 +591,54 @@
     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} {}
+  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");
+    auto numOperands = adaptor.getStrings().size();
+
+    std::vector<hlfir::Entity> chars;
+    std::vector<
+        std::pair<fir::ExtendedValue, std::optional<hlfir::CleanupFunction>>>
+        pairs;
+    llvm::SmallVector<fir::CharBoxValue> opCBVs;
+    for (size_t i = 0; i < numOperands; ++i) {
+      chars.emplace_back(getBufferizedExprStorage(adaptor.getStrings()[i]));
+      pairs.emplace_back(
+          hlfir::translateToExtendedValue(loc, builder, chars[i]));
+      assert(!pairs[i].second && "expected variables");
+      opCBVs.emplace_back(*pairs[i].first.getCharBox());
+    }
+
+    fir::ExtendedValue res =
+        fir::factory::CharacterExprHelper{builder, loc}.createCharExtremum(
+            predIsMin, opCBVs);
+    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.char_extremum",
+                                        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:
@@ -605,11 +653,12 @@
     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 +1,473 @@
+// Test hlfir.concat operation lowering to operations operating on memory.
+
+// RUN: fir-opt %s -bufferize-hlfir | FileCheck %s
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {uniq_name = "_QFmax1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_2:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFmax1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {uniq_name = "_QFmax1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_6:.*]] = arith.cmpi uge, %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_7:.*]] = arith.select %[[VAL_6]], %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_8:.*]] = fir.convert %[[VAL_5]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_9:.*]] = fir.convert %[[VAL_3]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_10:.*]] = fir.convert %[[VAL_4]]#1 : (index) -> i64
+// CHECK:   %[[VAL_11:.*]] = fir.convert %[[VAL_2]]#1 : (index) -> i64
+// CHECK:   %[[VAL_12:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_8]], %[[VAL_9]], %[[VAL_10]], %[[VAL_11]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_13:.*]] = arith.cmpi sgt, %[[VAL_12]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_14:.*]] = arith.select %[[VAL_13]], %[[VAL_5]]#1, %[[VAL_3]]#1 : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_15:.*]] = arith.select %[[VAL_13]], %[[VAL_4]]#1, %[[VAL_2]]#1 : index
+// CHECK:   %[[VAL_16:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_7]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_17:.*]] = arith.cmpi slt, %[[VAL_7]], %[[VAL_15]] : index
+// CHECK:   %[[VAL_18:.*]] = arith.select %[[VAL_17]], %[[VAL_7]], %[[VAL_15]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_19:.*]] = fir.convert %[[VAL_18]] : (index) -> i64
+// CHECK:   %[[VAL_20:.*]] = arith.muli %[[C1_I64]], %[[VAL_19]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_21:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_14]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_21]], %[[VAL_22]], %[[VAL_20]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_23:.*]] = arith.subi %[[VAL_7]], %[[C1]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_24:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_25:.*]] = fir.insert_value %[[VAL_24]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_0:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG3:.*]] = %[[VAL_18:.*]] to %[[VAL_23]] step %[[C1_0]] {
+// CHECK:     %[[VAL_30:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_31:.*]] = fir.coordinate_of %[[VAL_30]], %[[ARG3]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_25:.*]] to %[[VAL_31]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_26:.*]]:2 = hlfir.declare %[[VAL_16]] typeparams %[[VAL_7]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[FALSE_1:.*]] = arith.constant false
+// CHECK:   %[[VAL_27:.*]] = fir.undefined tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_28:.*]] = fir.insert_value %[[VAL_27]], %[[FALSE_1]], [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_29:.*]] = fir.insert_value %[[VAL_28]], %[[VAL_26]]#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   hlfir.assign %[[VAL_26]]#0 to %[[VAL_1]]#0 : !fir.boxchar<1>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {uniq_name = "_QFmin1Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_2:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFmin1Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {uniq_name = "_QFmin1Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_6:.*]] = arith.cmpi uge, %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_7:.*]] = arith.select %[[VAL_6]], %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_8:.*]] = fir.convert %[[VAL_5]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_9:.*]] = fir.convert %[[VAL_3]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_10:.*]] = fir.convert %[[VAL_4]]#1 : (index) -> i64
+// CHECK:   %[[VAL_11:.*]] = fir.convert %[[VAL_2]]#1 : (index) -> i64
+// CHECK:   %[[VAL_12:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_8]], %[[VAL_9]], %[[VAL_10]], %[[VAL_11]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_13:.*]] = arith.cmpi slt, %[[VAL_12]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_14:.*]] = arith.select %[[VAL_13]], %[[VAL_5]]#1, %[[VAL_3]]#1 : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_15:.*]] = arith.select %[[VAL_13]], %[[VAL_4]]#1, %[[VAL_2]]#1 : index
+// CHECK:   %[[VAL_16:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_7]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_17:.*]] = arith.cmpi slt, %[[VAL_7]], %[[VAL_15]] : index
+// CHECK:   %[[VAL_18:.*]] = arith.select %[[VAL_17]], %[[VAL_7]], %[[VAL_15]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_19:.*]] = fir.convert %[[VAL_18]] : (index) -> i64
+// CHECK:   %[[VAL_20:.*]] = arith.muli %[[C1_I64]], %[[VAL_19]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_21:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_14]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_21]], %[[VAL_22]], %[[VAL_20]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_23:.*]] = arith.subi %[[VAL_7]], %[[C1]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_24:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_25:.*]] = fir.insert_value %[[VAL_24]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_0:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG3:.*]] = %[[VAL_18:.*]] to %[[VAL_23]] step %[[C1_0]] {
+// CHECK:     %[[VAL_30:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_31:.*]] = fir.coordinate_of %[[VAL_30]], %[[ARG3]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_25:.*]] to %[[VAL_31]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_26:.*]]:2 = hlfir.declare %[[VAL_16]] typeparams %[[VAL_7]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[FALSE_1:.*]] = arith.constant false
+// CHECK:   %[[VAL_27:.*]] = fir.undefined tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_28:.*]] = fir.insert_value %[[VAL_27]], %[[FALSE_1]], [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_29:.*]] = fir.insert_value %[[VAL_28]], %[[VAL_26]]#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   hlfir.assign %[[VAL_26]]#0 to %[[VAL_1]]#0 : !fir.boxchar<1>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]] = fir.convert %[[VAL_0]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+// CHECK:   %[[C100:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_2:.*]] = fir.shape %[[C100]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_1]](%[[VAL_2]]) typeparams %[[VAL_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,?>>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[C10:.*]] = arith.constant 10 : index
+// CHECK:   %[[VAL_5:.*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+// CHECK:   %[[C100_0:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_6:.*]] = fir.shape %[[C100_0]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_5]](%[[VAL_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>>>)
+// CHECK:   %[[VAL_8:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[C20:.*]] = arith.constant 20 : index
+// CHECK:   %[[VAL_9:.*]] = fir.convert %[[VAL_8]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+// CHECK:   %[[C100_1:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_10:.*]] = fir.shape %[[C100_1]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_9]](%[[VAL_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>>>)
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_12:.*]] = hlfir.designate %[[VAL_7]]#0 (%[[C1]])  typeparams %[[C1]]0 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+// CHECK:   %[[C1_2:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_13:.*]] = hlfir.designate %[[VAL_11]]#0 (%[[C1_2]])  typeparams %[[C20]] : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+// CHECK:   %[[VAL_14:.*]] = arith.cmpi uge, %[[C10]], %[[C20]] : index
+// CHECK:   %[[VAL_15:.*]] = arith.select %[[VAL_14]], %[[C10]], %[[C20]] : index
+// CHECK:   %[[VAL_16:.*]] = fir.convert %[[VAL_13]] : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_17:.*]] = fir.convert %[[VAL_12]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_18:.*]] = fir.convert %[[C20]] : (index) -> i64
+// CHECK:   %[[VAL_19:.*]] = fir.convert %[[C10]] : (index) -> i64
+// CHECK:   %[[VAL_20:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_16]], %[[VAL_17]], %[[VAL_18]], %[[VAL_19]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_21:.*]] = arith.cmpi sgt, %[[VAL_20]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_12]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_23:.*]] = fir.convert %[[VAL_13]] : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_24:.*]] = arith.select %[[VAL_21]], %[[VAL_23]], %[[VAL_22]] : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_25:.*]] = arith.select %[[VAL_21]], %[[C20]], %[[C10]] : index
+// CHECK:   %[[VAL_26:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_15]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_27:.*]] = arith.cmpi slt, %[[VAL_15]], %[[VAL_25]] : index
+// CHECK:   %[[VAL_28:.*]] = arith.select %[[VAL_27]], %[[VAL_15]], %[[VAL_25]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_29:.*]] = fir.convert %[[VAL_28]] : (index) -> i64
+// CHECK:   %[[VAL_30:.*]] = arith.muli %[[C1_I64]], %[[VAL_29]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_31:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_32:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_31]], %[[VAL_32]], %[[VAL_30]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1_3:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_33:.*]] = arith.subi %[[VAL_15]], %[[C1_3]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_34:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_35:.*]] = fir.insert_value %[[VAL_34]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_4:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG3:.*]] = %[[VAL_28:.*]] to %[[VAL_33]] step %[[C1_4]] {
+// CHECK:     %[[VAL_42:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_43:.*]] = fir.coordinate_of %[[VAL_42]], %[[ARG3]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_35:.*]] to %[[VAL_43]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_36:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.char<1,20>>
+// CHECK:   %[[VAL_37:.*]]:2 = hlfir.declare %[[VAL_36]] typeparams %[[VAL_15]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,20>>, index) -> (!fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,20>>)
+// CHECK:   %[[FALSE_5:.*]] = arith.constant false
+// CHECK:   %[[VAL_38:.*]] = fir.undefined tuple<!fir.ref<!fir.char<1,20>>, i1>
+// CHECK:   %[[VAL_39:.*]] = fir.insert_value %[[VAL_38]], %[[FALSE_5]], [1 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, i1) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+// CHECK:   %[[VAL_40:.*]] = fir.insert_value %[[VAL_39]], %[[VAL_37]]#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>
+// CHECK:   %[[C1_6:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_41:.*]] = hlfir.designate %[[VAL_3]]#0 (%[[C1_6]])  typeparams %[[VAL_0]]#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+// CHECK:   hlfir.assign %[[VAL_37]]#0 to %[[VAL_41:.*]] : !fir.ref<!fir.char<1,20>>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]] = fir.convert %[[VAL_0]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,?>>>
+// CHECK:   %[[C100:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_2:.*]] = fir.shape %[[C100]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_1]](%[[VAL_2]]) typeparams %[[VAL_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,?>>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[C10:.*]] = arith.constant 10 : index
+// CHECK:   %[[VAL_5:.*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,10>>>
+// CHECK:   %[[C100_0:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_6:.*]] = fir.shape %[[C100_0]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_5]](%[[VAL_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>>>)
+// CHECK:   %[[VAL_8:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[C20:.*]] = arith.constant 20 : index
+// CHECK:   %[[VAL_9:.*]] = fir.convert %[[VAL_8]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<100x!fir.char<1,20>>>
+// CHECK:   %[[C100_1:.*]] = arith.constant 100 : index
+// CHECK:   %[[VAL_10:.*]] = fir.shape %[[C100_1]] : (index) -> !fir.shape<1>
+// CHECK:   %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_9]](%[[VAL_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>>>)
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_12:.*]] = hlfir.designate %[[VAL_7]]#0 (%[[C1]])  typeparams %[[C1]]0 : (!fir.ref<!fir.array<100x!fir.char<1,10>>>, index, index) -> !fir.ref<!fir.char<1,10>>
+// CHECK:   %[[C1_2:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_13:.*]] = hlfir.designate %[[VAL_11]]#0 (%[[C1_2]])  typeparams %[[C20]] : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, index, index) -> !fir.ref<!fir.char<1,20>>
+// CHECK:   %[[VAL_14:.*]] = arith.cmpi uge, %[[C10]], %[[C20]] : index
+// CHECK:   %[[VAL_15:.*]] = arith.select %[[VAL_14]], %[[C10]], %[[C20]] : index
+// CHECK:   %[[VAL_16:.*]] = fir.convert %[[VAL_13]] : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_17:.*]] = fir.convert %[[VAL_12]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_18:.*]] = fir.convert %[[C20]] : (index) -> i64
+// CHECK:   %[[VAL_19:.*]] = fir.convert %[[C10]] : (index) -> i64
+// CHECK:   %[[VAL_20:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_16]], %[[VAL_17]], %[[VAL_18]], %[[VAL_19]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_21:.*]] = arith.cmpi slt, %[[VAL_20]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_12]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_23:.*]] = fir.convert %[[VAL_13]] : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_24:.*]] = arith.select %[[VAL_21]], %[[VAL_23]], %[[VAL_22]] : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_25:.*]] = arith.select %[[VAL_21]], %[[C20]], %[[C10]] : index
+// CHECK:   %[[VAL_26:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_15]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_27:.*]] = arith.cmpi slt, %[[VAL_15]], %[[VAL_25]] : index
+// CHECK:   %[[VAL_28:.*]] = arith.select %[[VAL_27]], %[[VAL_15]], %[[VAL_25]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_29:.*]] = fir.convert %[[VAL_28]] : (index) -> i64
+// CHECK:   %[[VAL_30:.*]] = arith.muli %[[C1_I64]], %[[VAL_29]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_31:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_32:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_31]], %[[VAL_32]], %[[VAL_30]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1_3:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_33:.*]] = arith.subi %[[VAL_15]], %[[C1_3]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_34:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_35:.*]] = fir.insert_value %[[VAL_34]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_4:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG3:.*]] = %[[VAL_28:.*]] to %[[VAL_33]] step %[[C1_4]] {
+// CHECK:     %[[VAL_42:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_43:.*]] = fir.coordinate_of %[[VAL_42]], %[[ARG3]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_35:.*]] to %[[VAL_43]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_36:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.char<1,20>>
+// CHECK:   %[[VAL_37:.*]]:2 = hlfir.declare %[[VAL_36]] typeparams %[[VAL_15]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,20>>, index) -> (!fir.ref<!fir.char<1,20>>, !fir.ref<!fir.char<1,20>>)
+// CHECK:   %[[FALSE_5:.*]] = arith.constant false
+// CHECK:   %[[VAL_38:.*]] = fir.undefined tuple<!fir.ref<!fir.char<1,20>>, i1>
+// CHECK:   %[[VAL_39:.*]] = fir.insert_value %[[VAL_38]], %[[FALSE_5]], [1 : index] : (tuple<!fir.ref<!fir.char<1,20>>, i1>, i1) -> tuple<!fir.ref<!fir.char<1,20>>, i1>
+// CHECK:   %[[VAL_40:.*]] = fir.insert_value %[[VAL_39]], %[[VAL_37]]#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>
+// CHECK:   %[[C1_6:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_41:.*]] = hlfir.designate %[[VAL_3]]#0 (%[[C1_6]])  typeparams %[[VAL_0]]#1 : (!fir.box<!fir.array<100x!fir.char<1,?>>>, index, index) -> !fir.boxchar<1>
+// CHECK:   hlfir.assign %[[VAL_37]]#0 to %[[VAL_41:.*]] : !fir.ref<!fir.char<1,20>>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {uniq_name = "_QFmax3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_2:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFmax3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {uniq_name = "_QFmax3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_6:.*]]:2 = fir.unboxchar %[[ARG3]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_6]]#0 typeparams %[[VAL_6]]#1 {uniq_name = "_QFmax3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_8:.*]] = arith.cmpi uge, %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_9:.*]] = arith.select %[[VAL_8]], %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_10:.*]] = fir.convert %[[VAL_5]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_11:.*]] = fir.convert %[[VAL_3]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_12:.*]] = fir.convert %[[VAL_4]]#1 : (index) -> i64
+// CHECK:   %[[VAL_13:.*]] = fir.convert %[[VAL_2]]#1 : (index) -> i64
+// CHECK:   %[[VAL_14:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_10]], %[[VAL_11]], %[[VAL_12]], %[[VAL_13]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_15:.*]] = arith.cmpi sgt, %[[VAL_14]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_16:.*]] = arith.select %[[VAL_15]], %[[VAL_5]]#1, %[[VAL_3]]#1 : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_17:.*]] = arith.select %[[VAL_15]], %[[VAL_4]]#1, %[[VAL_2]]#1 : index
+// CHECK:   %[[VAL_18:.*]] = arith.cmpi uge, %[[VAL_9]], %[[VAL_6]]#1 : index
+// CHECK:   %[[VAL_19:.*]] = arith.select %[[VAL_18]], %[[VAL_9]], %[[VAL_6]]#1 : index
+// CHECK:   %[[VAL_20:.*]] = fir.convert %[[VAL_7]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_21:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_6]]#1 : (index) -> i64
+// CHECK:   %[[VAL_23:.*]] = fir.convert %[[VAL_17]] : (index) -> i64
+// CHECK:   %[[VAL_24:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_20]], %[[VAL_21]], %[[VAL_22]], %[[VAL_23]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32_0:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_25:.*]] = arith.cmpi sgt, %[[VAL_24]], %[[C0_I32_0]] : i32
+// CHECK:   %[[VAL_26:.*]] = arith.select %[[VAL_25]], %[[VAL_7]]#1, %[[VAL_16]] : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_27:.*]] = arith.select %[[VAL_25]], %[[VAL_6]]#1, %[[VAL_17]] : index
+// CHECK:   %[[VAL_28:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_19]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_29:.*]] = arith.cmpi slt, %[[VAL_19]], %[[VAL_27]] : index
+// CHECK:   %[[VAL_30:.*]] = arith.select %[[VAL_29]], %[[VAL_19]], %[[VAL_27]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_31:.*]] = fir.convert %[[VAL_30]] : (index) -> i64
+// CHECK:   %[[VAL_32:.*]] = arith.muli %[[C1_I64]], %[[VAL_31]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_33:.*]] = fir.convert %[[VAL_28]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_34:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_33]], %[[VAL_34]], %[[VAL_32]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_35:.*]] = arith.subi %[[VAL_19]], %[[C1]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_36:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_37:.*]] = fir.insert_value %[[VAL_36]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_1:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG4:.*]] = %[[VAL_30:.*]] to %[[VAL_35]] step %[[C1_1]] {
+// CHECK:     %[[VAL_42:.*]] = fir.convert %[[VAL_28]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_43:.*]] = fir.coordinate_of %[[VAL_42]], %[[ARG4]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_37:.*]] to %[[VAL_43]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_38:.*]]:2 = hlfir.declare %[[VAL_28]] typeparams %[[VAL_19]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[FALSE_2:.*]] = arith.constant false
+// CHECK:   %[[VAL_39:.*]] = fir.undefined tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_40:.*]] = fir.insert_value %[[VAL_39]], %[[FALSE_2]], [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_41:.*]] = fir.insert_value %[[VAL_40]], %[[VAL_38]]#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   hlfir.assign %[[VAL_38]]#0 to %[[VAL_1]]#0 : !fir.boxchar<1>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
+
+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
+}
+
+// CHECK: 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"}) {
+// CHECK:   %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {uniq_name = "_QFmin3Ec1"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_2:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFmin3Ec2"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_4:.*]]:2 = fir.unboxchar %[[ARG2]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]]#0 typeparams %[[VAL_4]]#1 {uniq_name = "_QFmin3Ec3"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_6:.*]]:2 = fir.unboxchar %[[ARG3]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+// CHECK:   %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_6]]#0 typeparams %[[VAL_6]]#1 {uniq_name = "_QFmin3Ec4"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[VAL_8:.*]] = arith.cmpi uge, %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_9:.*]] = arith.select %[[VAL_8]], %[[VAL_2]]#1, %[[VAL_4]]#1 : index
+// CHECK:   %[[VAL_10:.*]] = fir.convert %[[VAL_5]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_11:.*]] = fir.convert %[[VAL_3]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_12:.*]] = fir.convert %[[VAL_4]]#1 : (index) -> i64
+// CHECK:   %[[VAL_13:.*]] = fir.convert %[[VAL_2]]#1 : (index) -> i64
+// CHECK:   %[[VAL_14:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_10]], %[[VAL_11]], %[[VAL_12]], %[[VAL_13]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_15:.*]] = arith.cmpi slt, %[[VAL_14]], %[[C0_I32]] : i32
+// CHECK:   %[[VAL_16:.*]] = arith.select %[[VAL_15]], %[[VAL_5]]#1, %[[VAL_3]]#1 : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_17:.*]] = arith.select %[[VAL_15]], %[[VAL_4]]#1, %[[VAL_2]]#1 : index
+// CHECK:   %[[VAL_18:.*]] = arith.cmpi uge, %[[VAL_9]], %[[VAL_6]]#1 : index
+// CHECK:   %[[VAL_19:.*]] = arith.select %[[VAL_18]], %[[VAL_9]], %[[VAL_6]]#1 : index
+// CHECK:   %[[VAL_20:.*]] = fir.convert %[[VAL_7]]#1 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_21:.*]] = fir.convert %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_22:.*]] = fir.convert %[[VAL_6]]#1 : (index) -> i64
+// CHECK:   %[[VAL_23:.*]] = fir.convert %[[VAL_17]] : (index) -> i64
+// CHECK:   %[[VAL_24:.*]] = fir.call @_FortranACharacterCompareScalar1(%[[VAL_20]], %[[VAL_21]], %[[VAL_22]], %[[VAL_23]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i64) -> i32
+// CHECK:   %[[C0_I32_0:.*]] = arith.constant 0 : i32
+// CHECK:   %[[VAL_25:.*]] = arith.cmpi slt, %[[VAL_24]], %[[C0_I32_0]] : i32
+// CHECK:   %[[VAL_26:.*]] = arith.select %[[VAL_25]], %[[VAL_7]]#1, %[[VAL_16]] : !fir.ref<!fir.char<1,?>>
+// CHECK:   %[[VAL_27:.*]] = arith.select %[[VAL_25]], %[[VAL_6]]#1, %[[VAL_17]] : index
+// CHECK:   %[[VAL_28:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_19]] : index) {bindc_name = ".chrtmp"}
+// CHECK:   %[[VAL_29:.*]] = arith.cmpi slt, %[[VAL_19]], %[[VAL_27]] : index
+// CHECK:   %[[VAL_30:.*]] = arith.select %[[VAL_29]], %[[VAL_19]], %[[VAL_27]] : index
+// CHECK:   %[[C1_I64:.*]] = arith.constant 1 : i64
+// CHECK:   %[[VAL_31:.*]] = fir.convert %[[VAL_30]] : (index) -> i64
+// CHECK:   %[[VAL_32:.*]] = arith.muli %[[C1_I64]], %[[VAL_31]] : i64
+// CHECK:   %[[FALSE:.*]] = arith.constant false
+// CHECK:   %[[VAL_33:.*]] = fir.convert %[[VAL_28]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   %[[VAL_34:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+// CHECK:   fir.call @llvm.memmove.p0.p0.i64(%[[VAL_33]], %[[VAL_34]], %[[VAL_32]], %[[FALSE]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+// CHECK:   %[[C1:.*]] = arith.constant 1 : index
+// CHECK:   %[[VAL_35:.*]] = arith.subi %[[VAL_19]], %[[C1]] : index
+// CHECK:   %[[C32_I8:.*]] = arith.constant 32 : i8
+// CHECK:   %[[VAL_36:.*]] = fir.undefined !fir.char<1>
+// CHECK:   %[[VAL_37:.*]] = fir.insert_value %[[VAL_36]], %[[C32_I8]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+// CHECK:   %[[C1_1:.*]] = arith.constant 1 : index
+// CHECK:   fir.do_loop %[[ARG4:.*]] = %[[VAL_30:.*]] to %[[VAL_35]] step %[[C1_1]] {
+// CHECK:     %[[VAL_42:.*]] = fir.convert %[[VAL_28]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+// CHECK:     %[[VAL_43:.*]] = fir.coordinate_of %[[VAL_42]], %[[ARG4]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+// CHECK:     fir.store %[[VAL_37:.*]] to %[[VAL_43]] : !fir.ref<!fir.char<1>>
+// CHECK:   }
+// CHECK:   %[[VAL_38:.*]]:2 = hlfir.declare %[[VAL_28]] typeparams %[[VAL_19]] {uniq_name = ".tmp.char_extremum"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
+// CHECK:   %[[FALSE_2:.*]] = arith.constant false
+// CHECK:   %[[VAL_39:.*]] = fir.undefined tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_40:.*]] = fir.insert_value %[[VAL_39]], %[[FALSE_2]], [1 : index] : (tuple<!fir.boxchar<1>, i1>, i1) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   %[[VAL_41:.*]] = fir.insert_value %[[VAL_40]], %[[VAL_38]]#0, [0 : index] : (tuple<!fir.boxchar<1>, i1>, !fir.boxchar<1>) -> tuple<!fir.boxchar<1>, i1>
+// CHECK:   hlfir.assign %[[VAL_38]]#0 to %[[VAL_1]]#0 : !fir.boxchar<1>, !fir.boxchar<1>
+// CHECK:   return
+// CHECK: }
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>>
+