[flang-commits] [flang] 2812cb0 - [Flang] HLFIR maxloc intrinsic (#75450)
via flang-commits
flang-commits at lists.llvm.org
Fri Dec 15 01:32:19 PST 2023
Author: David Green
Date: 2023-12-15T09:32:15Z
New Revision: 2812cb065aada939965b82f015bc1ce3f65fd350
URL: https://github.com/llvm/llvm-project/commit/2812cb065aada939965b82f015bc1ce3f65fd350
DIFF: https://github.com/llvm/llvm-project/commit/2812cb065aada939965b82f015bc1ce3f65fd350.diff
LOG: [Flang] HLFIR maxloc intrinsic (#75450)
Similar to minloc from #74436, this adds a hlfir maxloc intrinsic so
that we can keep them symmetrical. It's just a bit of copy and pasting.
Added:
flang/test/HLFIR/maxloc-lowering.fir
flang/test/HLFIR/maxloc.fir
flang/test/Lower/HLFIR/maxloc.f90
Modified:
flang/include/flang/Optimizer/HLFIR/HLFIROps.td
flang/lib/Lower/HlfirIntrinsics.cpp
flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIRIntrinsics.cpp
flang/test/HLFIR/invalid.fir
flang/test/HLFIR/memory-effects.fir
Removed:
################################################################################
diff --git a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
index 195754134729cd..254771ca1780cf 100644
--- a/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
+++ b/flang/include/flang/Optimizer/HLFIR/HLFIROps.td
@@ -483,6 +483,32 @@ def hlfir_MinlocOp : hlfir_Op<"minloc", [AttrSizedOperandSegments,
let hasVerifier = 1;
}
+def hlfir_MaxlocOp : hlfir_Op<"maxloc", [AttrSizedOperandSegments,
+ DeclareOpInterfaceMethods<ArithFastMathInterface>,
+ DeclareOpInterfaceMethods<MemoryEffectsOpInterface>]> {
+ let summary = "MAXLOC transformational intrinsic";
+ let description = [{
+ Maxlocs of an array.
+ }];
+
+ let arguments = (ins
+ AnyFortranArrayObject:$array,
+ Optional<AnyIntegerType>:$dim,
+ Optional<AnyFortranLogicalOrI1ArrayObject>:$mask,
+ Optional<Type<AnyLogicalLike.predicate>>:$back,
+ DefaultValuedAttr<Arith_FastMathAttr,
+ "::mlir::arith::FastMathFlags::none">:$fastmath
+ );
+
+ let results = (outs AnyFortranValue);
+
+ let assemblyFormat = [{
+ $array (`dim` $dim^)? (`mask` $mask^)? (`back` $back^)? attr-dict `:` functional-type(operands, results)
+ }];
+
+ let hasVerifier = 1;
+}
+
def hlfir_ProductOp : hlfir_Op<"product", [AttrSizedOperandSegments,
DeclareOpInterfaceMethods<ArithFastMathInterface>,
DeclareOpInterfaceMethods<MemoryEffectsOpInterface>]> {
diff --git a/flang/lib/Lower/HlfirIntrinsics.cpp b/flang/lib/Lower/HlfirIntrinsics.cpp
index f217b01b97e6a0..bda04fa9689beb 100644
--- a/flang/lib/Lower/HlfirIntrinsics.cpp
+++ b/flang/lib/Lower/HlfirIntrinsics.cpp
@@ -105,6 +105,7 @@ class HlfirMinMaxLocIntrinsic : public HlfirTransformationalIntrinsic {
mlir::Type stmtResultType) override;
};
using HlfirMinlocLowering = HlfirMinMaxLocIntrinsic<hlfir::MinlocOp>;
+using HlfirMaxlocLowering = HlfirMinMaxLocIntrinsic<hlfir::MaxlocOp>;
template <typename OP>
class HlfirProductIntrinsic : public HlfirTransformationalIntrinsic {
@@ -428,6 +429,9 @@ std::optional<hlfir::EntityWithAttributes> Fortran::lower::lowerHlfirIntrinsic(
if (name == "minloc")
return HlfirMinlocLowering{builder, loc}.lower(loweredActuals, argLowering,
stmtResultType);
+ if (name == "maxloc")
+ return HlfirMaxlocLowering{builder, loc}.lower(loweredActuals, argLowering,
+ stmtResultType);
if (mlir::isa<fir::CharacterType>(stmtResultType)) {
if (name == "min")
return HlfirCharExtremumLowering{builder, loc,
diff --git a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
index 46eee8acac24b9..439d106d0bfed4 100644
--- a/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
+++ b/flang/lib/Optimizer/HLFIR/IR/HLFIROps.cpp
@@ -864,17 +864,15 @@ void hlfir::MinvalOp::getEffects(
// MinlocOp
//===----------------------------------------------------------------------===//
-mlir::LogicalResult hlfir::MinlocOp::verify() {
- mlir::Operation *op = getOperation();
+template <typename NumericalReductionOp>
+static mlir::LogicalResult
+verifyResultForMinMaxLoc(NumericalReductionOp reductionOp) {
+ mlir::Operation *op = reductionOp->getOperation();
auto results = op->getResultTypes();
assert(results.size() == 1);
- auto res = verifyArrayAndMaskForReductionOp(this);
- if (failed(res))
- return res;
-
- mlir::Value array = getArray();
- mlir::Value dim = getDim();
+ mlir::Value array = reductionOp->getArray();
+ mlir::Value dim = reductionOp->getDim();
fir::SequenceType arrayTy =
hlfir::getFortranElementOrSequenceType(array.getType())
.cast<fir::SequenceType>();
@@ -883,28 +881,37 @@ mlir::LogicalResult hlfir::MinlocOp::verify() {
mlir::Type resultType = results[0];
if (dim && arrayShape.size() == 1) {
if (!fir::isa_integer(resultType))
- return emitOpError("result must be scalar integer");
+ return reductionOp->emitOpError("result must be scalar integer");
} else if (auto resultExpr =
mlir::dyn_cast_or_null<hlfir::ExprType>(resultType)) {
if (!resultExpr.isArray())
- return emitOpError("result must be an array");
+ return reductionOp->emitOpError("result must be an array");
if (!fir::isa_integer(resultExpr.getEleTy()))
- return emitOpError("result must have integer elements");
+ return reductionOp->emitOpError("result must have integer elements");
llvm::ArrayRef<int64_t> resultShape = resultExpr.getShape();
// With dim the result has rank n-1
if (dim && resultShape.size() != (arrayShape.size() - 1))
- return emitOpError("result rank must be one less than ARRAY");
+ return reductionOp->emitOpError(
+ "result rank must be one less than ARRAY");
// With dim the result has rank n
if (!dim && resultShape.size() != 1)
- return emitOpError("result rank must be 1");
+ return reductionOp->emitOpError("result rank must be 1");
} else {
- return emitOpError("result must be of numerical expr type");
+ return reductionOp->emitOpError("result must be of numerical expr type");
}
return mlir::success();
}
+mlir::LogicalResult hlfir::MinlocOp::verify() {
+ auto res = verifyArrayAndMaskForReductionOp(this);
+ if (failed(res))
+ return res;
+
+ return verifyResultForMinMaxLoc(this);
+}
+
void hlfir::MinlocOp::getEffects(
llvm::SmallVectorImpl<
mlir::SideEffects::EffectInstance<mlir::MemoryEffects::Effect>>
@@ -912,6 +919,25 @@ void hlfir::MinlocOp::getEffects(
getIntrinsicEffects(getOperation(), effects);
}
+//===----------------------------------------------------------------------===//
+// MaxlocOp
+//===----------------------------------------------------------------------===//
+
+mlir::LogicalResult hlfir::MaxlocOp::verify() {
+ auto res = verifyArrayAndMaskForReductionOp(this);
+ if (failed(res))
+ return res;
+
+ return verifyResultForMinMaxLoc(this);
+}
+
+void hlfir::MaxlocOp::getEffects(
+ llvm::SmallVectorImpl<
+ mlir::SideEffects::EffectInstance<mlir::MemoryEffects::Effect>>
+ &effects) {
+ getIntrinsicEffects(getOperation(), effects);
+}
+
//===----------------------------------------------------------------------===//
// SetLengthOp
//===----------------------------------------------------------------------===//
diff --git a/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIRIntrinsics.cpp b/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIRIntrinsics.cpp
index a66fd45579b388..314e4264c17e83 100644
--- a/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIRIntrinsics.cpp
+++ b/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIRIntrinsics.cpp
@@ -249,6 +249,8 @@ class HlfirReductionIntrinsicConversion : public HlfirIntrinsicConversion<OP> {
opName = "minval";
} else if constexpr (std::is_same_v<OP, hlfir::MinlocOp>) {
opName = "minloc";
+ } else if constexpr (std::is_same_v<OP, hlfir::MaxlocOp>) {
+ opName = "maxloc";
} else if constexpr (std::is_same_v<OP, hlfir::AnyOp>) {
opName = "any";
} else if constexpr (std::is_same_v<OP, hlfir::AllOp>) {
@@ -271,7 +273,8 @@ class HlfirReductionIntrinsicConversion : public HlfirIntrinsicConversion<OP> {
std::is_same_v<OP, hlfir::MaxvalOp> ||
std::is_same_v<OP, hlfir::MinvalOp>) {
args = buildNumericalArgs(operation, i32, logicalType, rewriter, opName);
- } else if constexpr (std::is_same_v<OP, hlfir::MinlocOp>) {
+ } else if constexpr (std::is_same_v<OP, hlfir::MinlocOp> ||
+ std::is_same_v<OP, hlfir::MaxlocOp>) {
args = buildMinMaxLocArgs(operation, i32, logicalType, rewriter, opName,
builder);
} else {
@@ -299,6 +302,8 @@ using MinvalOpConversion = HlfirReductionIntrinsicConversion<hlfir::MinvalOp>;
using MinlocOpConversion = HlfirReductionIntrinsicConversion<hlfir::MinlocOp>;
+using MaxlocOpConversion = HlfirReductionIntrinsicConversion<hlfir::MaxlocOp>;
+
using AnyOpConversion = HlfirReductionIntrinsicConversion<hlfir::AnyOp>;
using AllOpConversion = HlfirReductionIntrinsicConversion<hlfir::AllOp>;
@@ -473,12 +478,12 @@ class LowerHLFIRIntrinsics
mlir::ModuleOp module = this->getOperation();
mlir::MLIRContext *context = &getContext();
mlir::RewritePatternSet patterns(context);
- patterns.insert<MatmulOpConversion, MatmulTransposeOpConversion,
- AllOpConversion, AnyOpConversion, SumOpConversion,
- ProductOpConversion, TransposeOpConversion,
- CountOpConversion, DotProductOpConversion,
- MaxvalOpConversion, MinvalOpConversion, MinlocOpConversion>(
- context);
+ patterns
+ .insert<MatmulOpConversion, MatmulTransposeOpConversion,
+ AllOpConversion, AnyOpConversion, SumOpConversion,
+ ProductOpConversion, TransposeOpConversion, CountOpConversion,
+ DotProductOpConversion, MaxvalOpConversion, MinvalOpConversion,
+ MinlocOpConversion, MaxlocOpConversion>(context);
mlir::ConversionTarget target(*context);
target.addLegalDialect<mlir::BuiltinDialect, mlir::arith::ArithDialect,
mlir::func::FuncDialect, fir::FIROpsDialect,
@@ -486,7 +491,8 @@ class LowerHLFIRIntrinsics
target.addIllegalOp<hlfir::MatmulOp, hlfir::MatmulTransposeOp, hlfir::SumOp,
hlfir::ProductOp, hlfir::TransposeOp, hlfir::AnyOp,
hlfir::AllOp, hlfir::DotProductOp, hlfir::CountOp,
- hlfir::MaxvalOp, hlfir::MinvalOp, hlfir::MinlocOp>();
+ hlfir::MaxvalOp, hlfir::MinvalOp, hlfir::MinlocOp,
+ hlfir::MaxlocOp>();
target.markUnknownOpDynamicallyLegal(
[](mlir::Operation *) { return true; });
if (mlir::failed(
diff --git a/flang/test/HLFIR/invalid.fir b/flang/test/HLFIR/invalid.fir
index ce0d728749b960..56f74d8bf29e68 100644
--- a/flang/test/HLFIR/invalid.fir
+++ b/flang/test/HLFIR/invalid.fir
@@ -614,6 +614,71 @@ func.func @bad_minloc11(%arg0: !hlfir.expr<?x?x!fir.char<1,?>>, %arg1: i32, %arg
%0 = hlfir.minloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x?x!fir.char<1,?>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<?x?xi32>
}
+// -----
+func.func @bad_maxloc1(%arg0: !hlfir.expr<?xi32>, %arg1: i32, %arg2: !fir.box<!fir.logical<4>>) {
+ // expected-error at +1 {{'hlfir.maxloc' op result must be scalar integer}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?xi32>, i32, !fir.box<!fir.logical<4>>) -> f32
+}
+
+// -----
+func.func @bad_maxloc2(%arg0: !hlfir.expr<?xi32>, %arg1: i32, %arg2: !fir.box<!fir.array<?x?x?x?x?x!fir.logical<4>>>) {
+ // expected-warning at +1 {{MASK must be conformable to ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?xi32>, i32, !fir.box<!fir.array<?x?x?x?x?x!fir.logical<4>>>) -> !hlfir.expr<i32>
+}
+
+// -----
+func.func @bad_maxloc3(%arg0: !hlfir.expr<?x5x?xi32>, %arg1: i32, %arg2: !fir.box<!fir.array<2x6x?x!fir.logical<4>>>) {
+ // expected-warning at +1 {{MASK must be conformable to ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x5x?xi32>, i32, !fir.box<!fir.array<2x6x?x!fir.logical<4>>>) -> !hlfir.expr<i32>
+}
+
+// -----
+func.func @bad_maxloc4(%arg0: !hlfir.expr<?x?xi32>, %arg1: i32, %arg2: !fir.box<!fir.logical<4>>) {
+ // expected-error at +1 {{'hlfir.maxloc' op result rank must be one less than ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x?xi32>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<?x?xi32>
+}
+
+// -----
+func.func @bad_maxloc5(%arg0: !hlfir.expr<?xi32>, %arg1: i32, %arg2: !fir.box<!fir.logical<4>>) {
+ // expected-error at +1 {{'hlfir.maxloc' op result must be scalar integer}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?xi32>, i32, !fir.box<!fir.logical<4>>) -> !fir.logical<4>
+}
+
+// -----
+func.func @bad_maxloc6(%arg0: !hlfir.expr<?x?xi32>, %arg1: i32){
+ // expected-error at +1 {{'hlfir.maxloc' op result must be an array}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 : (!hlfir.expr<?x?xi32>, i32) -> !hlfir.expr<i32>
+}
+
+// -----
+func.func @bad_maxloc7(%arg0: !hlfir.expr<?xi32>){
+ // expected-error at +1 {{'hlfir.maxloc' op result must be of numerical expr type}}
+ %0 = hlfir.maxloc %arg0 : (!hlfir.expr<?xi32>) -> i32
+}
+
+// -----
+func.func @bad_maxloc8(%arg0: !hlfir.expr<?xi32>){
+ // expected-error at +1 {{'hlfir.maxloc' op result must have integer elements}}
+ %0 = hlfir.maxloc %arg0 : (!hlfir.expr<?xi32>) -> !hlfir.expr<?xf32>
+}
+
+// -----
+func.func @bad_maxloc9(%arg0: !hlfir.expr<?x!fir.char<1,?>>, %arg1: i32, %arg2: !fir.box<!fir.array<?x?x?x?x?x!fir.logical<4>>>) {
+ // expected-warning at +1 {{MASK must be conformable to ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x!fir.char<1,?>>, i32, !fir.box<!fir.array<?x?x?x?x?x!fir.logical<4>>>) -> !hlfir.expr<!fir.char<1,?>>
+}
+
+// -----
+func.func @bad_maxloc10(%arg0: !hlfir.expr<?x5x?x!fir.char<1,?>>, %arg1: i32, %arg2: !fir.box<!fir.array<2x6x?x!fir.logical<4>>>) {
+ // expected-warning at +1 {{MASK must be conformable to ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x5x?x!fir.char<1,?>>, i32, !fir.box<!fir.array<2x6x?x!fir.logical<4>>>) -> !hlfir.expr<!fir.char<1,?>>
+}
+
+// -----
+func.func @bad_maxloc11(%arg0: !hlfir.expr<?x?x!fir.char<1,?>>, %arg1: i32, %arg2: !fir.box<!fir.logical<4>>) {
+ // expected-error at +1 {{'hlfir.maxloc' op result rank must be one less than ARRAY}}
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %arg2 : (!hlfir.expr<?x?x!fir.char<1,?>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<?x?xi32>
+}
// -----
diff --git a/flang/test/HLFIR/maxloc-lowering.fir b/flang/test/HLFIR/maxloc-lowering.fir
new file mode 100644
index 00000000000000..9e52a074a6e285
--- /dev/null
+++ b/flang/test/HLFIR/maxloc-lowering.fir
@@ -0,0 +1,329 @@
+// Test hlfir.maxloc operation lowering to fir runtime call
+// RUN: fir-opt %s -lower-hlfir-intrinsics | FileCheck %s
+
+// simple one argument maxloc
+func.func @_QPmaxloc1(%arg0: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %arg1: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFmaxloc1Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %1:2 = hlfir.declare %arg1 {uniq_name = "_QFmaxloc1Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %2 = hlfir.maxloc %0#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>) -> !hlfir.expr<?xi32>
+ hlfir.assign %2 to %1#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+ hlfir.destroy %2 : !hlfir.expr<?xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc1(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFmaxloc1Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFmaxloc1Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %[[V3:.*]] = fir.absent !fir.box<i1>
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V4:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V5:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V6:.*]] = fir.embox %[[V4]](%[[V5]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V6]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V8:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V9:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?xi32>>) -> !fir.box<none>
+// CHECK: %[[V12:.*]] = fir.convert %[[V3]] : (!fir.box<i1>) -> !fir.box<none>
+// CHECK-NEXT: %[[V13:.*]] = fir.call @_FortranAMaxlocInteger4(%[[V8]], %[[V9]], %c4_i32, {{.*}}, {{.*}}, %[[V12]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V14:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V15:.*]]:3 = fir.box_dims %[[V14]], %c0_0 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V16:.*]] = fir.box_addr %[[V14]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V17:.*]] = fir.shape_shift %[[V15]]#0, %[[V15]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V18:.*]]:2 = hlfir.declare %[[V16]](%[[V17]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %[[V19:.*]] = hlfir.as_expr %[[V18]]#0 move %true : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V19]] to %[[V2]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V19]] : !hlfir.expr<?xi32>
+
+
+// maxloc with a dim
+func.func @_QPmaxloc2(%arg0: !fir.box<!fir.array<?x?xi32>> {fir.bindc_name = "a"}, %arg1: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %arg2: !fir.ref<index> {fir.bindc_name = "d"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFmaxloc2Ea"} : (!fir.box<!fir.array<?x?xi32>>) -> (!fir.box<!fir.array<?x?xi32>>, !fir.box<!fir.array<?x?xi32>>)
+ %1:2 = hlfir.declare %arg2 {uniq_name = "_QFmaxloc2Ed"} : (!fir.ref<index>) -> (!fir.ref<index>, !fir.ref<index>)
+ %2:2 = hlfir.declare %arg1 {uniq_name = "_QFmaxloc2Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %3 = fir.load %1#0 : !fir.ref<index>
+ %4 = hlfir.maxloc %0#0 dim %3#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?xi32>>, index) -> !hlfir.expr<?xi32>
+ hlfir.assign %4 to %2#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+ hlfir.destroy %4 : !hlfir.expr<?xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc2(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x?xi32>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK: %[[ARG2:.*]]: !fir.ref<index>
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFmaxloc2Ea"} : (!fir.box<!fir.array<?x?xi32>>) -> (!fir.box<!fir.array<?x?xi32>>, !fir.box<!fir.array<?x?xi32>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG2]] {uniq_name = "_QFmaxloc2Ed"} : (!fir.ref<index>) -> (!fir.ref<index>, !fir.ref<index>)
+// CHECK-NEXT: %[[V3:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFmaxloc2Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V4:.*]] = fir.load %[[V2]]#0 : !fir.ref<index>
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %[[V5:.*]] = fir.convert %[[V4]] : (index) -> i32
+// CHECK-NEXT: %[[V6:.*]] = fir.absent !fir.box<i1>
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V7:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V8:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V9:.*]] = fir.embox %[[V7]](%[[V8]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V9]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V11:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V12:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?x?xi32>>) -> !fir.box<none>
+// CHECK: %[[V15:.*]] = fir.convert %[[V6]] : (!fir.box<i1>) -> !fir.box<none>
+// CHECK-NEXT: %[[V16:.*]] = fir.call @_FortranAMaxlocDim(%[[V11]], %[[V12]], %c4_i32, %[[V5]], {{.*}}, {{.*}}, %[[V15]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V17:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V18:.*]]:3 = fir.box_dims %[[V17]], %c0_0 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V19:.*]] = fir.box_addr %[[V17]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V20:.*]] = fir.shape_shift %[[V18]]#0, %[[V18]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V21:.*]]:2 = hlfir.declare %[[V19]](%[[V20]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %[[V22:.*]] = hlfir.as_expr %[[V21]]#0 move %true : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V22]] to %[[V3]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V22]] : !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+
+
+// maxloc with scalar mask
+func.func @_QPmaxloc3(%arg0: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %arg1: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %arg2: !fir.ref<!fir.logical<4>> {fir.bindc_name = "m"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFmaxloc3Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %1:2 = hlfir.declare %arg2 {uniq_name = "_QFmaxloc3Em"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
+ %2:2 = hlfir.declare %arg1 {uniq_name = "_QFmaxloc3Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %3 = hlfir.maxloc %0#0 mask %1#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.ref<!fir.logical<4>>) -> !hlfir.expr<?xi32>
+ hlfir.assign %3 to %2#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+ hlfir.destroy %3 : !hlfir.expr<?xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc3(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK: %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFmaxloc3Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG2]] {uniq_name = "_QFmaxloc3Em"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
+// CHECK-NEXT: %[[V3:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFmaxloc3Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %[[V4:.*]] = fir.embox %[[V2]]#1 : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V5:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V6:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V7:.*]] = fir.embox %[[V5]](%[[V6]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V7]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V9:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V10:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?xi32>>) -> !fir.box<none>
+// CHECK: %[[V13:.*]] = fir.convert %[[V4]] : (!fir.box<!fir.logical<4>>) -> !fir.box<none>
+// CHECK-NEXT: %[[V14:.*]] = fir.call @_FortranAMaxlocInteger4(%[[V9]], %[[V10]], %c4_i32, {{.*}}, {{.*}}, %[[V13]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V15:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V16:.*]]:3 = fir.box_dims %[[V15]], %c0_0 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V17:.*]] = fir.box_addr %[[V15]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V18:.*]] = fir.shape_shift %[[V16]]#0, %[[V16]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V19:.*]]:2 = hlfir.declare %[[V17]](%[[V18]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %[[V20:.*]] = hlfir.as_expr %[[V19]]#0 move %true : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V20]] to %[[V3]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V20]] : !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+
+
+// maxloc with array mask
+func.func @_QPmaxloc4(%arg0: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %arg1: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %arg2: !fir.box<!fir.array<?x!fir.logical<4>>> {fir.bindc_name = "m"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFmaxloc4Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %1:2 = hlfir.declare %arg2 {uniq_name = "_QFmaxloc4Em"} : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> (!fir.box<!fir.array<?x!fir.logical<4>>>, !fir.box<!fir.array<?x!fir.logical<4>>>)
+ %2:2 = hlfir.declare %arg1 {uniq_name = "_QFmaxloc4Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %3 = hlfir.maxloc %0#0 mask %1#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?x!fir.logical<4>>>) -> !hlfir.expr<?xi32>
+ hlfir.assign %3 to %2#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+ hlfir.destroy %3 : !hlfir.expr<?xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc4(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK: %[[ARG2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFmaxloc4Ea"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG2]] {uniq_name = "_QFmaxloc4Em"} : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> (!fir.box<!fir.array<?x!fir.logical<4>>>, !fir.box<!fir.array<?x!fir.logical<4>>>)
+// CHECK-NEXT: %[[V3:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFmaxloc4Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V4:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V5:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V6:.*]] = fir.embox %[[V4]](%[[V5]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V6]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V8:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V9:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?xi32>>) -> !fir.box<none>
+// CHECK: %[[V12:.*]] = fir.convert %[[V2]]#1 : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> !fir.box<none>
+// CHECK-NEXT: %[[V13:.*]] = fir.call @_FortranAMaxlocInteger4(%[[V8]], %[[V9]], %c4_i32, {{.*}}, {{.*}}, %[[V12]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V14:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V15:.*]]:3 = fir.box_dims %[[V14]], %c0_0 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V16:.*]] = fir.box_addr %[[V14]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V17:.*]] = fir.shape_shift %[[V15]]#0, %[[V15]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V18:.*]]:2 = hlfir.declare %[[V16]](%[[V17]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %[[V19:.*]] = hlfir.as_expr %[[V18]]#0 move %true : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V19]] to %[[V3]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V19]] : !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+
+
+fir.global internal @_QFmaxloc5Ea : !fir.array<2x2xi32> {
+ %0 = fir.undefined !fir.array<2x2xi32>
+ %c1_i32 = arith.constant 1 : i32
+ %1 = fir.insert_value %0, %c1_i32, [0 : index, 0 : index] : (!fir.array<2x2xi32>, i32) -> !fir.array<2x2xi32>
+ %c2_i32 = arith.constant 2 : i32
+ %2 = fir.insert_value %1, %c2_i32, [1 : index, 0 : index] : (!fir.array<2x2xi32>, i32) -> !fir.array<2x2xi32>
+ %c3_i32 = arith.constant 3 : i32
+ %3 = fir.insert_value %2, %c3_i32, [0 : index, 1 : index] : (!fir.array<2x2xi32>, i32) -> !fir.array<2x2xi32>
+ %c4_i32 = arith.constant 4 : i32
+ %4 = fir.insert_value %3, %c4_i32, [1 : index, 1 : index] : (!fir.array<2x2xi32>, i32) -> !fir.array<2x2xi32>
+ %c2 = arith.constant 2 : index
+ %c2_0 = arith.constant 2 : index
+ fir.has_value %4 : !fir.array<2x2xi32>
+}
+
+// 3 argument maxloc, using local variables
+func.func @_QPmaxloc5(%arg0: !fir.ref<!fir.array<2xi32>> {fir.bindc_name = "s"}) {
+ %0 = fir.address_of(@_QFmaxloc5Ea) : !fir.ref<!fir.array<2x2xi32>>
+ %c2 = arith.constant 2 : index
+ %c2_0 = arith.constant 2 : index
+ %1 = fir.shape %c2, %c2_0 : (index, index) -> !fir.shape<2>
+ %2:2 = hlfir.declare %0(%1) {uniq_name = "_QFmaxloc5Ea"} : (!fir.ref<!fir.array<2x2xi32>>, !fir.shape<2>) -> (!fir.ref<!fir.array<2x2xi32>>, !fir.ref<!fir.array<2x2xi32>>)
+ %c2_1 = arith.constant 2 : index
+ %3 = fir.shape %c2_1 : (index) -> !fir.shape<1>
+ %4:2 = hlfir.declare %arg0(%3) {uniq_name = "_QFmaxloc5Es"} : (!fir.ref<!fir.array<2xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<2xi32>>, !fir.ref<!fir.array<2xi32>>)
+ %c1_i32 = arith.constant 1 : i32
+ %true = arith.constant true
+ %5 = hlfir.maxloc %2#0 dim %c1_i32 mask %true {fastmath = #arith.fastmath<contract>} : (!fir.ref<!fir.array<2x2xi32>>, i32, i1) -> !hlfir.expr<2xi32>
+ hlfir.assign %5 to %4#0 : !hlfir.expr<2xi32>, !fir.ref<!fir.array<2xi32>>
+ hlfir.destroy %5 : !hlfir.expr<2xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc5(
+// CHECK: %[[ARG0:.*]]: !fir.ref<!fir.array<2xi32>> {fir.bindc_name = "s"}
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[V2:.*]] = fir.address_of(@_QFmaxloc5Ea) : !fir.ref<!fir.array<2x2xi32>>
+// CHECK-NEXT: %c2 = arith.constant 2 : index
+// CHECK-NEXT: %c2_0 = arith.constant 2 : index
+// CHECK-NEXT: %[[V3:.*]] = fir.shape %c2, %c2_0 : (index, index) -> !fir.shape<2>
+// CHECK-NEXT: %[[V4:.*]]:2 = hlfir.declare %[[V2]](%[[V3]]) {uniq_name = "_QFmaxloc5Ea"} : (!fir.ref<!fir.array<2x2xi32>>, !fir.shape<2>) -> (!fir.ref<!fir.array<2x2xi32>>, !fir.ref<!fir.array<2x2xi32>>)
+// CHECK-NEXT: %c2_1 = arith.constant 2 : index
+// CHECK-NEXT: %[[V5:.*]] = fir.shape %c2_1 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V6:.*]]:2 = hlfir.declare %[[ARG0]](%[[V5]]) {uniq_name = "_QFmaxloc5Es"} : (!fir.ref<!fir.array<2xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<2xi32>>, !fir.ref<!fir.array<2xi32>>)
+// CHECK-NEXT: %c1_i32 = arith.constant 1 : i32
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %[[V7:.*]] = fir.shape %c2, %c2_0 : (index, index) -> !fir.shape<2>
+// CHECK-NEXT: %[[V8:.*]] = fir.embox %[[V4]]#1(%[[V7]]) : (!fir.ref<!fir.array<2x2xi32>>, !fir.shape<2>) -> !fir.box<!fir.array<2x2xi32>>
+// CHECK-NEXT: %[[V9:.*]] = fir.convert %true : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[V9]] to %[[V1]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[V10:.*]] = fir.embox %[[V1]] : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V11:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V12:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V13:.*]] = fir.embox %[[V11]](%[[V12]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V13]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V15:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V16:.*]] = fir.convert %[[V8]] : (!fir.box<!fir.array<2x2xi32>>) -> !fir.box<none>
+// CHECK: %[[V19:.*]] = fir.convert %[[V10]] : (!fir.box<!fir.logical<4>>) -> !fir.box<none>
+// CHECK-NEXT: %[[V20:.*]] = fir.call @_FortranAMaxlocDim(%[[V15]], %[[V16]], %c4_i32, %c1_i32, {{.*}}, {{.*}}, %[[V19]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V21:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_2 = arith.constant 0 : index
+// CHECK-NEXT: %[[V22:.*]]:3 = fir.box_dims %[[V21]], %c0_2 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V23:.*]] = fir.box_addr %[[V21]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V24:.*]] = fir.shape_shift %[[V22]]#0, %[[V22]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V25:.*]]:2 = hlfir.declare %[[V23]](%[[V24]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true_3 = arith.constant true
+// CHECK-NEXT: %[[V26:.*]] = hlfir.as_expr %[[V25]]#0 move %true_3 : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V26]] to %[[V6]]#0 : !hlfir.expr<?xi32>, !fir.ref<!fir.array<2xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V26]] : !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+
+
+// simple one argument maxloc for character
+func.func @_QPmaxloc6(%arg0: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %arg1: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFmaxloc6Ea"} : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> (!fir.box<!fir.array<?x!fir.char<1,?>>>, !fir.box<!fir.array<?x!fir.char<1,?>>>)
+ %1:2 = hlfir.declare %arg1 {uniq_name = "_QFmaxloc4Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %2 = hlfir.maxloc %0#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> !hlfir.expr<?xi32>
+ hlfir.assign %2 to %1#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+ hlfir.destroy %2 : !hlfir.expr<?xi32>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc6(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFmaxloc6Ea"} : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> (!fir.box<!fir.array<?x!fir.char<1,?>>>, !fir.box<!fir.array<?x!fir.char<1,?>>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFmaxloc4Es"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %[[V3:.*]] = fir.absent !fir.box<i1>
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V4:.*]] = fir.zero_bits !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %c0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V5:.*]] = fir.shape %c0 : (index) -> !fir.shape<1>
+// CHECK-NEXT: %[[V6:.*]] = fir.embox %[[V4]](%[[V5]]) : (!fir.heap<!fir.array<?xi32>>, !fir.shape<1>) -> !fir.box<!fir.heap<!fir.array<?xi32>>>
+// CHECK-NEXT: fir.store %[[V6]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK: %[[V8:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V9:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> !fir.box<none>
+// CHECK: %[[V12:.*]] = fir.convert %[[V3]] : (!fir.box<i1>) -> !fir.box<none>
+// CHECK-NEXT: %[[V13:.*]] = fir.call @_FortranAMaxlocCharacter(%[[V8]], %[[V9]], %c4_i32, {{.*}}, {{.*}}, %[[V12]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V14:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+// CHECK-NEXT: %c0_0 = arith.constant 0 : index
+// CHECK-NEXT: %[[V15:.*]]:3 = fir.box_dims %[[V14]], %c0_0 : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
+// CHECK-NEXT: %[[V16:.*]] = fir.box_addr %[[V14]] : (!fir.box<!fir.heap<!fir.array<?xi32>>>) -> !fir.heap<!fir.array<?xi32>>
+// CHECK-NEXT: %[[V17:.*]] = fir.shape_shift %[[V15]]#0, %[[V15]]#1 : (index, index) -> !fir.shapeshift<1>
+// CHECK-NEXT: %[[V18:.*]]:2 = hlfir.declare %[[V16]](%[[V17]]) {uniq_name = ".tmp.intrinsic_result"} : (!fir.heap<!fir.array<?xi32>>, !fir.shapeshift<1>) -> (!fir.box<!fir.array<?xi32>>, !fir.heap<!fir.array<?xi32>>)
+// CHECK-NEXT: %true = arith.constant true
+// CHECK-NEXT: %[[V19:.*]] = hlfir.as_expr %[[V18]]#0 move %true : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: hlfir.assign %[[V19]] to %[[V2]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: hlfir.destroy %[[V19]] : !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+
+
+// including mask and back
+func.func @_QPmaxloc7(%arg0: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %arg1: !fir.ref<i32> {fir.bindc_name = "d"}, %arg2: !fir.box<!fir.array<?x!fir.logical<4>>> {fir.bindc_name = "m"}, %arg3: !fir.ref<!fir.logical<4>> {fir.bindc_name = "b"}, %arg4: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}) {
+ %0:2 = hlfir.declare %arg0 {uniq_name = "_QFFtestEa"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %1:2 = hlfir.declare %arg3 {uniq_name = "_QFFtestEb"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
+ %2:2 = hlfir.declare %arg1 {uniq_name = "_QFFtestEd"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+ %3:2 = hlfir.declare %arg2 {uniq_name = "_QFFtestEm"} : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> (!fir.box<!fir.array<?x!fir.logical<4>>>, !fir.box<!fir.array<?x!fir.logical<4>>>)
+ %4:2 = hlfir.declare %arg4 {uniq_name = "_QFFtestEs"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+ %5 = fir.load %2#0 : !fir.ref<i32>
+ %6 = hlfir.maxloc %0#0 dim %5 mask %3#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, i32, !fir.box<!fir.array<?x!fir.logical<4>>>) -> i32
+ hlfir.assign %6 to %4#0 : i32, !fir.box<!fir.array<?xi32>>
+ return
+}
+// CHECK-LABEL: func.func @_QPmaxloc7(
+// CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}
+// CHECK: %[[ARG1:.*]]: !fir.ref<i32> {fir.bindc_name = "d"}
+// CHECK: %[[ARG2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>> {fir.bindc_name = "m"}
+// CHECK: %[[ARG3:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "b"}
+// CHECK: %[[ARG4:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}
+// CHECK-NEXT: %[[V0:.*]] = fir.alloca !fir.box<!fir.heap<i32>>
+// CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG0]] {uniq_name = "_QFFtestEa"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG3]] {uniq_name = "_QFFtestEb"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
+// CHECK-NEXT: %[[V3:.*]]:2 = hlfir.declare %[[ARG1]] {uniq_name = "_QFFtestEd"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+// CHECK-NEXT: %[[V4:.*]]:2 = hlfir.declare %[[ARG2]] {uniq_name = "_QFFtestEm"} : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> (!fir.box<!fir.array<?x!fir.logical<4>>>, !fir.box<!fir.array<?x!fir.logical<4>>>)
+// CHECK-NEXT: %[[V5:.*]]:2 = hlfir.declare %[[ARG4]] {uniq_name = "_QFFtestEs"} : (!fir.box<!fir.array<?xi32>>) -> (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?xi32>>)
+// CHECK-NEXT: %[[V6:.*]] = fir.load %[[V3]]#0 : !fir.ref<i32>
+// CHECK-NEXT: %c4_i32 = arith.constant 4 : i32
+// CHECK-NEXT: %false = arith.constant false
+// CHECK-NEXT: %[[V7:.*]] = fir.zero_bits !fir.heap<i32>
+// CHECK-NEXT: %[[V8:.*]] = fir.embox %[[V7]] : (!fir.heap<i32>) -> !fir.box<!fir.heap<i32>>
+// CHECK-NEXT: fir.store %[[V8]] to %[[V0]] : !fir.ref<!fir.box<!fir.heap<i32>>>
+// CHECK: %[[V10:.*]] = fir.convert %[[V0]] : (!fir.ref<!fir.box<!fir.heap<i32>>>) -> !fir.ref<!fir.box<none>>
+// CHECK-NEXT: %[[V11:.*]] = fir.convert %[[V1]]#1 : (!fir.box<!fir.array<?xi32>>) -> !fir.box<none>
+// CHECK: %[[V14:.*]] = fir.convert %[[V4]]#1 : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> !fir.box<none>
+// CHECK-NEXT: %[[V15:.*]] = fir.call @_FortranAMaxlocDim(%[[V10]], %[[V11]], %c4_i32, %[[V6]], {{.*}}, {{.*}}, %[[V14]], %false) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, i32, !fir.ref<i8>, i32, !fir.box<none>, i1) -> none
+// CHECK-NEXT: %[[V16:.*]] = fir.load %[[V0]] : !fir.ref<!fir.box<!fir.heap<i32>>>
+// CHECK-NEXT: %[[V17:.*]] = fir.box_addr %[[V16]] : (!fir.box<!fir.heap<i32>>) -> !fir.heap<i32>
+// CHECK-NEXT: %[[V18:.*]] = fir.load %[[V17]] : !fir.heap<i32>
+// CHECK-NEXT: fir.freemem %[[V17]] : !fir.heap<i32>
+// CHECK-NEXT: hlfir.assign %[[V18]] to %[[V5]]#0 : i32, !fir.box<!fir.array<?xi32>>
+// CHECK-NEXT: return
+
diff --git a/flang/test/HLFIR/maxloc.fir b/flang/test/HLFIR/maxloc.fir
new file mode 100644
index 00000000000000..7325644d7e8cd9
--- /dev/null
+++ b/flang/test/HLFIR/maxloc.fir
@@ -0,0 +1,272 @@
+// Test hlfir.maxloc operation parse, verify (no errors), and unparse
+
+// RUN: fir-opt %s | fir-opt | FileCheck %s
+
+// array is an expression of known shape
+func.func @maxloc0(%arg0: !hlfir.expr<42xi32>) {
+ %mask = fir.alloca !fir.logical<4>
+ %c_1 = arith.constant 1 : index
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %mask_box : (!hlfir.expr<42xi32>, index, !fir.box<!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc0(%[[ARRAY:.*]]: !hlfir.expr<42xi32>) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL]] to %[[MASK]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %0 : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[C1]] mask %[[BOX]] : (!hlfir.expr<42xi32>, index, !fir.box<!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// array is an expression of assumed shape
+func.func @maxloc1(%arg0: !hlfir.expr<?xi32>) {
+ %mask = fir.alloca !fir.logical<4>
+ %c_1 = arith.constant 1 : index
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %mask_box : (!hlfir.expr<?xi32>, index, !fir.box<!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc1(%[[ARRAY:.*]]: !hlfir.expr<?xi32>) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL:.*]] to %[[MASK:.*]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %[[MASK:.*]] : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY:.*]] dim %[[C1]] mask %[[BOX]] : (!hlfir.expr<?xi32>, index, !fir.box<!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// boxed array
+func.func @maxloc2(%arg0: !fir.box<!fir.array<42xi32>>) {
+ %mask = fir.alloca !fir.logical<4>
+ %c_1 = arith.constant 1 : index
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %mask_box : (!fir.box<!fir.array<42xi32>>, index, !fir.box<!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc2(%[[ARRAY:.*]]: !fir.box<!fir.array<42xi32>>) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL:.*]] to %[[MASK:.*]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %[[MASK:.*]] : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY:.*]] dim %[[C1]] mask %[[BOX]] : (!fir.box<!fir.array<42xi32>>, index, !fir.box<!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// assumed shape boxed array
+func.func @maxloc3(%arg0: !fir.box<!fir.array<?xi32>>) {
+ %mask = fir.alloca !fir.logical<4>
+ %c_1 = arith.constant 1 : index
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %mask_box : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc3(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL:.*]] to %[[MASK:.*]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %[[MASK:.*]] : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY:.*]] dim %[[C1]] mask %[[BOX]] : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// known shape expr mask
+func.func @maxloc4(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !hlfir.expr<42x!fir.logical<4>>) {
+ %c_1 = arith.constant 1 : index
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %arg1 : (!fir.box<!fir.array<?xi32>>, index, !hlfir.expr<42x!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc4(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !hlfir.expr<42x!fir.logical<4>>) {
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[C1]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, index, !hlfir.expr<42x!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// assumed shape expr mask
+func.func @maxloc5(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !hlfir.expr<?x!fir.logical<4>>) {
+ %c_1 = arith.constant 1 : index
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %arg1 : (!fir.box<!fir.array<?xi32>>, index, !hlfir.expr<?x!fir.logical<4>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc5(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !hlfir.expr<?x!fir.logical<4>>) {
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[C1]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, index, !hlfir.expr<?x!fir.logical<4>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// known shape array mask
+func.func @maxloc6(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !fir.box<!fir.array<42x!fir.logical<4>>>) {
+ %c_1 = arith.constant 1 : index
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %arg1 : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.array<42x!fir.logical<4>>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc6(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !fir.box<!fir.array<42x!fir.logical<4>>>) {
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[C1]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.array<42x!fir.logical<4>>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// assumed shape array mask
+func.func @maxloc7(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !fir.box<!fir.array<?x!fir.logical<4>>>) {
+ %c_1 = arith.constant 1 : index
+ %0 = hlfir.maxloc %arg0 dim %c_1 mask %arg1 : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.array<?x!fir.logical<4>>>) -> i32
+ return
+}
+// CHECK: func.func @maxloc7(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>) {
+// CHECK-NEXT: %[[C1:.*]] = arith.constant 1 : index
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[C1]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, index, !fir.box<!fir.array<?x!fir.logical<4>>>) -> i32
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// known shape expr return
+func.func @maxloc8(%arg0: !fir.box<!fir.array<2x2xi32>>, %arg1: i32) {
+ %mask = fir.alloca !fir.logical<4>
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %mask_box : (!fir.box<!fir.array<2x2xi32>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<2xi32>
+ return
+}
+// CHECK: func.func @maxloc8(%[[ARRAY:.*]]: !fir.box<!fir.array<2x2xi32>>, %[[DIM:.*]]: i32) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL]] to %[[MASK]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %0 : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[DIM]] mask %[[BOX]] : (!fir.box<!fir.array<2x2xi32>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<2xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// assumed shape expr return
+func.func @maxloc9(%arg0: !fir.box<!fir.array<?x?xi32>>, %arg1: i32) {
+ %mask = fir.alloca !fir.logical<4>
+ %true = arith.constant true
+ %true_logical = fir.convert %true : (i1) -> !fir.logical<4>
+ fir.store %true_logical to %mask : !fir.ref<!fir.logical<4>>
+ %mask_box = fir.embox %mask : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+ %0 = hlfir.maxloc %arg0 dim %arg1 mask %mask_box : (!fir.box<!fir.array<?x?xi32>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<?xi32>
+ return
+}
+// CHECK: func.func @maxloc9(%[[ARRAY:.*]]: !fir.box<!fir.array<?x?xi32>>, %[[DIM:.*]]: i32) {
+// CHECK-NEXT: %[[MASK:.*]] = fir.alloca !fir.logical<4>
+// CHECK-NEXT: %[[TRUE:.*]] = arith.constant true
+// CHECK-NEXT: %[[LOGICAL:.*]] = fir.convert %[[TRUE]] : (i1) -> !fir.logical<4>
+// CHECK-NEXT: fir.store %[[LOGICAL]] to %[[MASK]] : !fir.ref<!fir.logical<4>>
+// CHECK-NEXT: %[[BOX:.*]] = fir.embox %0 : (!fir.ref<!fir.logical<4>>) -> !fir.box<!fir.logical<4>>
+// CHECK-NEXT: hlfir.maxloc %[[ARRAY]] dim %[[DIM]] mask %[[BOX]] : (!fir.box<!fir.array<?x?xi32>>, i32, !fir.box<!fir.logical<4>>) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with only an array argument
+func.func @maxloc10(%arg0: !fir.box<!fir.array<?x?xi32>>) {
+ %maxloc = hlfir.maxloc %arg0 : (!fir.box<!fir.array<?x?xi32>>) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc10(%[[ARRAY:.*]]: !fir.box<!fir.array<?x?xi32>>
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] : (!fir.box<!fir.array<?x?xi32>>) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with only a character array argument
+func.func @maxloc11(%arg0: !fir.box<!fir.array<?x?x!fir.char<1,?>>>) {
+ %maxloc = hlfir.maxloc %arg0 : (!fir.box<!fir.array<?x?x!fir.char<1,?>>>) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc11(%[[ARRAY:.*]]: !fir.box<!fir.array<?x?x!fir.char<1,?>>>
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] : (!fir.box<!fir.array<?x?x!fir.char<1,?>>>) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with array and dim argument
+func.func @maxloc12(%arg0: !fir.box<!fir.array<?x?xi32>>, %arg1: i32) {
+ %maxloc = hlfir.maxloc %arg0 dim %arg1 : (!fir.box<!fir.array<?x?xi32>>, i32) -> !hlfir.expr<?xi32>
+ return
+}
+// CHECK: func.func @maxloc12(%[[ARRAY:.*]]: !fir.box<!fir.array<?x?xi32>>, %[[DIM:.*]]: i32
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] dim %[[DIM]] : (!fir.box<!fir.array<?x?xi32>>, i32) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with array and mask argument
+func.func @maxloc13(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !fir.logical<4>) {
+ %maxloc = hlfir.maxloc %arg0 mask %arg1 : (!fir.box<!fir.array<?xi32>>, !fir.logical<4>) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc13(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !fir.logical<4>
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, !fir.logical<4>) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with dim argument with an unusual type
+func.func @maxloc14(%arg0: !fir.box<!fir.array<?x?xi32>>, %arg1: index) {
+ %maxloc = hlfir.maxloc %arg0 dim %arg1 : (!fir.box<!fir.array<?x?xi32>>, index) -> !hlfir.expr<?xi32>
+ return
+}
+// CHECK: func.func @maxloc14(%[[ARRAY:.*]]: !fir.box<!fir.array<?x?xi32>>, %[[DIM:.*]]: index
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] dim %[[DIM]] : (!fir.box<!fir.array<?x?xi32>>, index) -> !hlfir.expr<?xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with mask argument of unusual type
+func.func @maxloc15(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: i1) {
+ %maxloc = hlfir.maxloc %arg0 mask %arg1 : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc15(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: i1
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with mask argument of ref<array<>> type
+func.func @maxloc16(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: !fir.ref<!fir.array<?x!fir.logical<4>>>) {
+ %maxloc = hlfir.maxloc %arg0 mask %arg1 : (!fir.box<!fir.array<?xi32>>, !fir.ref<!fir.array<?x!fir.logical<4>>>) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc16(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: !fir.ref<!fir.array<?x!fir.logical<4>>>
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, !fir.ref<!fir.array<?x!fir.logical<4>>>) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+
+// hlfir.maxloc with kind implied by the return type
+func.func @maxloc17(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: i1) {
+ %maxloc = hlfir.maxloc %arg0 mask %arg1 : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<1xi16>
+ return
+}
+// CHECK: func.func @maxloc17(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: i1
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] mask %[[MASK]] : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<1xi16>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
+
+// hlfir.maxloc with back argument
+func.func @maxloc18(%arg0: !fir.box<!fir.array<?xi32>>, %arg1: i1) {
+ %true = arith.constant true
+ %maxloc = hlfir.maxloc %arg0 mask %arg1 back %true : (!fir.box<!fir.array<?xi32>>, i1, i1) -> !hlfir.expr<1xi32>
+ return
+}
+// CHECK: func.func @maxloc18(%[[ARRAY:.*]]: !fir.box<!fir.array<?xi32>>, %[[MASK:.*]]: i1
+// CHECK-NEXT: %[[C2:.*]] = arith.constant true
+// CHECK-NEXT: %[[maxloc:.*]] = hlfir.maxloc %[[ARRAY]] mask %[[MASK]] back %[[C2]] : (!fir.box<!fir.array<?xi32>>, i1, i1) -> !hlfir.expr<1xi32>
+// CHECK-NEXT: return
+// CHECK-NEXT: }
\ No newline at end of file
diff --git a/flang/test/HLFIR/memory-effects.fir b/flang/test/HLFIR/memory-effects.fir
index c68c71f43a17dd..32d6b264d6c11c 100644
--- a/flang/test/HLFIR/memory-effects.fir
+++ b/flang/test/HLFIR/memory-effects.fir
@@ -137,6 +137,21 @@ func.func @minloc_effects(%arg0: !fir.ref<!fir.array<2x2xf32>>, %arg1: i32) {
return
}
+func.func @maxloc_effects_simple(%arg0: !hlfir.expr<?xf32>) {
+// expected-remark at +1 {{found an instance of 'allocate' on a value, on resource '<Default>'}}
+ %maxloc = hlfir.maxloc %arg0 : (!hlfir.expr<?xf32>) -> !hlfir.expr<?xi32>
+// expected-remark at +1 {{operation has no memory effects}}
+ return
+}
+
+func.func @maxloc_effects(%arg0: !fir.ref<!fir.array<2x2xf32>>, %arg1: i32) {
+// expected-remark at +2 {{found an instance of 'allocate' on a value, on resource '<Default>'}}
+// expected-remark at +1 {{found an instance of 'read' on a value, on resource '<Default>'}}
+ %maxloc = hlfir.maxloc %arg0 dim %arg1 : (!fir.ref<!fir.array<2x2xf32>>, i32) -> !hlfir.expr<2xi32>
+// expected-remark at +1 {{operation has no memory effects}}
+ return
+}
+
func.func @dot_product_no_effects(%arg0: !hlfir.expr<?xf32>, %arg1: !hlfir.expr<?xf32>) {
// expected-remark at +1 {{operation has no memory effects}}
%0 = hlfir.dot_product %arg0 %arg1 : (!hlfir.expr<?xf32>, !hlfir.expr<?xf32>) -> f32
diff --git a/flang/test/Lower/HLFIR/maxloc.f90 b/flang/test/Lower/HLFIR/maxloc.f90
new file mode 100644
index 00000000000000..ea3cce92ae9011
--- /dev/null
+++ b/flang/test/Lower/HLFIR/maxloc.f90
@@ -0,0 +1,370 @@
+! Test lowering of MAXLOC intrinsic to HLFIR
+! RUN: bbc -emit-hlfir -o - %s 2>&1 | FileCheck %s
+
+! simple 1 argument MAXLOC
+subroutine maxloc1(a, s)
+ integer :: a(:), s(:)
+ s = MAXLOC(a)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc1(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc with by-ref DIM argument
+subroutine maxloc2(a, s, d)
+ integer :: a(:,:), s(:), d
+ s = MAXLOC(a, d)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc2(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<i32>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[DIM_REF:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[DIM:.*]] = fir.load %[[DIM_REF]]#0 : !fir.ref<i32>
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 dim %[[DIM]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?xi32>>, i32) -> !hlfir.expr<?xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc with scalar mask argument
+subroutine maxloc3(a, s, m)
+ integer :: a(:), s(:)
+ logical :: m
+ s = MAXLOC(a, m)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc3(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.ref<!fir.logical<4>>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc with array mask argument
+subroutine maxloc4(a, s, m)
+ integer :: a(:), s(:)
+ logical :: m(:)
+ s = MAXLOC(a, m)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc4(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?x!fir.logical<4>>>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc with all 3 arguments, dim is by-val, array isn't boxed
+subroutine maxloc5(s)
+ integer :: s(2)
+ integer :: a(2,2) = reshape((/1, 2, 3, 4/), [2,2])
+ s = maxloc(a, 1, .true.)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc5
+! CHECK: %[[ARG0:.*]]: !fir.ref<!fir.array<2xi32>>
+! CHECK-DAG: %[[ADDR:.*]] = fir.address_of({{.*}}) : !fir.ref<!fir.array<2x2xi32>>
+! CHECK-DAG: %[[ARRAY_SHAPE:.*]] = fir.shape {{.*}} -> !fir.shape<2>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ADDR]](%[[ARRAY_SHAPE]])
+! CHECK-DAG: %[[OUT_SHAPE:.*]] = fir.shape {{.*}} -> !fir.shape<1>
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG0]](%[[OUT_SHAPE]])
+! CHECK-DAG: %[[TRUE:.*]] = arith.constant true
+! CHECK-DAG: %[[C1:.*]] = arith.constant 1 : i32
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 dim %[[C1]] mask %[[TRUE]] {fastmath = #arith.fastmath<contract>} : (!fir.ref<!fir.array<2x2xi32>>, i32, i1) -> !hlfir.expr<2xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<2xi32>, !fir.ref<!fir.array<2xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<2xi32>
+! CHECK-NEXT: return
+! CHECK-nEXT: }
+
+! back argument as .true.
+subroutine maxloc_back(a, s)
+ integer :: a(:), s(:)
+ s = MAXLOC(a, BACK=.TRUE.)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc_back(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[C1:.*]] = arith.constant true
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 back %[[C1]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, i1) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! back argument as logical
+subroutine maxloc_back2(a, s, b)
+ integer :: a(:), s(:)
+ logical :: b
+ s = MAXLOC(a, BACK=b)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc_back2(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[BACKD:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-NEXT: %[[BACK:.*]] = fir.load %[[BACKD]]#0 : !fir.ref<!fir.logical<4>>
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 back %[[BACK]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.logical<4>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! back argument as optional logical
+subroutine maxloc_back3(a, s, b)
+ integer :: a(:), s(:)
+ logical, optional :: b
+ s = MAXLOC(a, BACK=b)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc_back3(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "b", fir.optional}) {
+! CHECK: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-NEXT: %[[BACKD:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-NEXT: %[[IFP:.*]] = fir.is_present %[[BACKD]]#0 : (!fir.ref<!fir.logical<4>>) -> i1
+! CHECK-NEXT: %[[BACK:.*]] = fir.if %[[IFP]] -> (!fir.logical<4>) {
+! CHECK-NEXT: %[[IFT:.*]] = fir.load %[[BACKD]]#0 : !fir.ref<!fir.logical<4>>
+! CHECK-NEXT: fir.result %[[IFT]] : !fir.logical<4>
+! CHECK-NEXT: } else {
+! CHECK-NEXT: %false = arith.constant false
+! CHECK-NEXT: %[[IFE:.*]] = fir.convert %false : (i1) -> !fir.logical<4>
+! CHECK-NEXT: fir.result %[[IFE]] : !fir.logical<4>
+! CHECK-NEXT: }
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 back %[[BACK]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.logical<4>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi32>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+
+! kind = 2
+subroutine maxloc_kind(a, s)
+ integer :: a(:), s(:)
+ s = MAXLOC(a, KIND=2)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc_kind(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>) -> !hlfir.expr<1xi16>
+! CHECK: %[[ELM:.*]] = hlfir.elemental
+! CHECK: hlfir.assign %[[ELM]] to %[[OUT]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[ELM]] : !hlfir.expr<?xi32>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]] : !hlfir.expr<1xi16>
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+subroutine maxloc6(a, s, d)
+ integer, pointer :: d
+ integer s(:)
+ real :: a(:,:)
+ s = maxloc(a, (d))
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc6(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x?xf32>>
+! CHECK: %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK: %[[ARG2:.*]]: !fir.ref<!fir.box<!fir.ptr<i32>>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[DIM_VAR:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[DIM_BOX:.*]] = fir.load %[[DIM_VAR]]#0 : !fir.ref<!fir.box<!fir.ptr<i32>>>
+! CHECK-NEXT: %[[DIM_ADDR:.*]] = fir.box_addr %[[DIM_BOX]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
+! CHECK-NEXT: %[[DIM0:.*]] = fir.load %[[DIM_ADDR]] : !fir.ptr<i32>
+! CHECK-NEXT: %[[DIM1:.*]] = hlfir.no_reassoc %[[DIM0]] : i32
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 dim %[[DIM1]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?xf32>>, i32) -> !hlfir.expr<?xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! simple 1 argument MAXLOC for character
+subroutine maxloc7(a, s)
+ character(*) :: a(:)
+ integer :: s(:)
+ s = MAXLOC(a)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc7(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc for character with by-ref DIM argument
+subroutine maxloc8(a, s, d)
+ character(*) :: a(:,:)
+ integer :: d, s(:)
+ s = MAXLOC(a, d)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc8(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<i32>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[DIM_REF:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[DIM:.*]] = fir.load %[[DIM_REF]]#0 : !fir.ref<i32>
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 dim %[[DIM]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?x!fir.char<1,?>>>, i32) -> !hlfir.expr<?xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+! maxloc for character with scalar mask argument
+subroutine maxloc9(a, s, m)
+ character(*) :: a(:)
+ integer :: s(:)
+ logical :: m
+ s = MAXLOC(a, m)
+end subroutine
+! CHECK-LABEL: func.func @_QPmaxloc9(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x!fir.char<1,?>>>, !fir.ref<!fir.logical<4>>) -> !hlfir.expr<1xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<1xi32>, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+subroutine testDynamicallyOptionalMask(array, mask, res)
+ integer :: array(:), res(:)
+ logical, allocatable :: mask(:)
+ res = MAXLOC(array, mask=mask)
+end subroutine
+! CHECK-LABEL: func.func @_QPtestdynamicallyoptionalmask(
+! CHECK-SAME: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "array"}
+! CHECK-SAME: %[[ARG1:.*]]: !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>>
+! CHECK-SAME: %[[ARG2:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[MASK:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[RES:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[MASK_LOAD:.*]] = fir.load %[[MASK]]#1
+! CHECK-NEXT: %[[MASK_ADDR:.*]] = fir.box_addr %[[MASK_LOAD]]
+! CHECK-NEXT: %[[MASK_ADDR_INT:.*]] = fir.convert %[[MASK_ADDR]]
+! CHECK-NEXT: %[[C0:.*]] = arith.constant 0 : i64
+! CHECK-NEXT: %[[CMP:.*]] = arith.cmpi ne, %[[MASK_ADDR_INT]], %[[C0]] : i64
+! it is a shame there is a second load here. The first is generated for
+! PreparedActualArgument::isPresent, the second is for optional handling
+! CHECK-NEXT: %[[MASK_LOAD2:.*]] = fir.load %[[MASK]]#1
+! CHECK-NEXT: %[[ABSENT:.*]] = fir.absent !fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>
+! CHECK-NEXT: %[[SELECT:.*]] = arith.select %[[CMP]], %[[MASK_LOAD2]], %[[ABSENT]]
+! CHECK-NEXT: %[[MAXLOC:.*]] = hlfir.maxloc %[[ARRAY]]#0 mask %[[SELECT]]
+! CHECK-NEXT: hlfir.assign %[[MAXLOC]] to %[[RES]]#0
+! CHECK-NEXT: hlfir.destroy %[[MAXLOC]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+subroutine testAllocatableArray(array, mask, res)
+ integer, allocatable :: array(:)
+ integer :: res(:)
+ logical :: mask(:)
+ res = MAXLOC(array, mask=mask)
+end subroutine
+! CHECK-LABEL: func.func @_QPtestallocatablearray(
+! CHECK-SAME: %[[ARG0:.*]]: !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+! CHECK-SAME: %[[ARG1:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
+! CHECK-SAME: %[[ARG2:.*]]: !fir.box<!fir.array<?xi32>>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-DAG: %[[MASK:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-DAG: %[[RES:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[LOADED_ARRAY:.*]] = fir.load %[[ARRAY]]#0
+! CHECK-NEXT: %[[MAXLOC:.*]] = hlfir.maxloc %[[LOADED_ARRAY]] mask %[[MASK]]#0
+! CHECK-NEXT: hlfir.assign %[[MAXLOC]] to %[[RES]]#0
+! CHECK-NEXT: hlfir.destroy %[[MAXLOC]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+function testOptionalScalar(array, mask)
+ integer :: array(:)
+ logical, optional :: mask
+ integer :: testOptionalScalar(1)
+ testOptionalScalar = maxloc(array, mask)
+end function
+! CHECK-LABEL: func.func @_QPtestoptionalscalar(
+! CHECK-SAME: %[[ARRAY_ARG:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "array"},
+! CHECK-SAME: %[[MASK_ARG:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "mask", fir.optional}) -> !fir.array<1xi32>
+! CHECK: %[[ARRAY_VAR:.*]]:2 = hlfir.declare %[[ARRAY_ARG]]
+! CHECK: %[[MASK_VAR:.*]]:2 = hlfir.declare %[[MASK_ARG]]
+! CHECK: %[[RET_ALLOC:.*]] = fir.alloca !fir.array<1xi32> {bindc_name = "testoptionalscalar", uniq_name = "_QFtestoptionalscalarEtestoptionalscalar"}
+! CHECK: %[[RET_VAR:.*]]:2 = hlfir.declare %[[RET_ALLOC]]
+! CHECK: %[[MASK_IS_PRESENT:.*]] = fir.is_present %[[MASK_VAR]]#0 : (!fir.ref<!fir.logical<4>>) -> i1
+! CHECK: %[[MASK_BOX:.*]] = fir.embox %[[MASK_VAR]]#1
+! CHECK: %[[ABSENT:.*]] = fir.absent !fir.box<!fir.logical<4>>
+! CHECK: %[[MASK_SELECT:.*]] = arith.select %[[MASK_IS_PRESENT]], %[[MASK_BOX]], %[[ABSENT]]
+! CHECK: %[[RES:.*]] = hlfir.maxloc %[[ARRAY_VAR]]#0 mask %[[MASK_SELECT]] {{.*}}: (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.logical<4>>) -> !hlfir.expr<1xi32>
+! CHECK: hlfir.assign %[[RES]] to %[[RET_VAR]]#0
+! CHECK: hlfir.destroy %[[RES]]
+! CHECK: %[[RET:.*]] = fir.load %[[RET_VAR]]#1 : !fir.ref<!fir.array<1xi32>>
+! CHECK: return %[[RET]] : !fir.array<1xi32>
+! CHECK: }
+
+! Test that hlfir.maxloc lowering inherits constant
+! character length from the argument, when the length
+! is unknown from the Fortran::evaluate expression type.
+subroutine test_unknown_char_len_result
+ character(len=3) :: array(3,3)
+ integer :: res(2)
+ res = maxloc(array(:,:)(:))
+end subroutine test_unknown_char_len_result
+! CHECK-LABEL: func.func @_QPtest_unknown_char_len_result() {
+! CHECK-DAG: %[[C3:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[C3_0:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[C3_1:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[ARRAY_ALLOC:.*]] = fir.alloca !fir.array<3x3x!fir.char<1,3>>
+! CHECK-DAG: %[[ARRAY_SHAPE:.*]] = fir.shape %[[C3_0]], %[[C3_1]] : (index, index) -> !fir.shape<2>
+! CHECK-DAG: %[[ARRAY:.*]]:2 = hlfir.declare %[[ARRAY_ALLOC]](%[[ARRAY_SHAPE]]) typeparams %[[C3]]
+! CHECK-DAG: %[[C2:.*]] = arith.constant 2 : index
+! CHECK-DAG: %[[RES_ALLOC:.*]] = fir.alloca !fir.array<2xi32>
+! CHECK-DAG: %[[RES_SHAPE:.*]] = fir.shape %[[C2]] : (index) -> !fir.shape<1>
+! CHECK-DAG: %[[RES:.*]]:2 = hlfir.declare %[[RES_ALLOC]](%[[RES_SHAPE]])
+! CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index
+! CHECK-DAG: %[[C1_3:.*]] = arith.constant 1 : index
+! CHECK-DAG: %[[C3_4:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[C1_5:.*]] = arith.constant 1 : index
+! CHECK-DAG: %[[C3_6:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[SHAPE:.*]] = fir.shape %[[C3_4]], %[[C3_6]] : (index, index) -> !fir.shape<2>
+! CHECK-DAG: %[[C1_7:.*]] = arith.constant 1 : index
+! CHECK-DAG: %[[C3_8:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[C3_9:.*]] = arith.constant 3 : index
+! CHECK-DAG: %[[ARRAY_BOX:.*]] = hlfir.designate %[[ARRAY]]#0 (%[[C1]]:%[[C3_0]]:%[[C1_3]], %[[C1]]:%[[C3_1]]:%[[C1_5]]) substr %[[C1_7]], %[[C3_8]] shape %[[SHAPE]] typeparams %[[C3_9]]
+! CHECK: %[[EXPR:.*]] = hlfir.maxloc %[[ARRAY_BOX]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<3x3x!fir.char<1,3>>>) -> !hlfir.expr<2xi32>
+! CHECK-NEXT: hlfir.assign %[[EXPR]] to %[[RES]]#0 : !hlfir.expr<2xi32>, !fir.ref<!fir.array<2xi32>>
+! CHECK-NEXT: hlfir.destroy %[[EXPR]]
+! CHECK-NEXT: return
+! CHECK-NEXT: }
+
+
+subroutine scalar_dim1(a, d, m, b, s)
+ integer :: a(:), d
+ integer :: s(:)
+ logical :: m(:), b
+ s = MAXLOC(a, dim=d, mask=m, kind=2, back=b)
+end subroutine
+! CHECK-LABEL: func.func @_QPscalar_dim1(
+! CHECK: %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<i32> {fir.bindc_name = "d"}, %[[ARG2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>> {fir.bindc_name = "m"}, %[[ARG3:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "b"}, %[[ARG4:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}) {
+! CHECK-NEXT: %[[V0:.*]]:2 = hlfir.declare %[[ARG0]]
+! CHECK-NEXT: %[[V1:.*]]:2 = hlfir.declare %[[ARG3]]
+! CHECK-NEXT: %[[V2:.*]]:2 = hlfir.declare %[[ARG1]]
+! CHECK-NEXT: %[[V3:.*]]:2 = hlfir.declare %[[ARG2]]
+! CHECK-NEXT: %[[V4:.*]]:2 = hlfir.declare %[[ARG4]]
+! CHECK-NEXT: %[[V5:.*]] = fir.load %[[V1]]#0 : !fir.ref<!fir.logical<4>>
+! CHECK-NEXT: %[[V6:.*]] = fir.load %[[V2]]#0 : !fir.ref<i32>
+! CHECK-NEXT: %[[V7:.*]] = hlfir.maxloc %[[V0]]#0 dim %[[V6]] mask %[[V3]]#0 back %[[V5]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, i32, !fir.box<!fir.array<?x!fir.logical<4>>>, !fir.logical<4>) -> i16
+! CHECK-NEXT: %[[V8:.*]] = fir.convert %[[V7]] : (i16) -> i32
+! CHECK-NEXT: hlfir.assign %[[V8]] to %[[V4]]#0 : i32, !fir.box<!fir.array<?xi32>>
+! CHECK-NEXT: return
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