diff --git a/flang/lib/Lower/IntrinsicCall.cpp b/flang/lib/Lower/IntrinsicCall.cpp
index 44ae5b1a4d30a..56413659d35ae 100644
--- a/flang/lib/Lower/IntrinsicCall.cpp
+++ b/flang/lib/Lower/IntrinsicCall.cpp
@@ -235,6 +235,7 @@ struct IntrinsicLibrary {
   /// real and to the `hypot` math routine if the argument is of complex type.
   mlir::Value genAbs(mlir::Type, llvm::ArrayRef<mlir::Value>);
   mlir::Value genAimag(mlir::Type, llvm::ArrayRef<mlir::Value>);
+  fir::ExtendedValue genAll(mlir::Type, llvm::ArrayRef<fir::ExtendedValue>);
   fir::ExtendedValue genAssociated(mlir::Type,
                                    llvm::ArrayRef<fir::ExtendedValue>);
   fir::ExtendedValue genChar(mlir::Type, llvm::ArrayRef<fir::ExtendedValue>);
@@ -316,6 +317,7 @@ struct IntrinsicHandler {
 };
 
 constexpr auto asValue = Fortran::lower::LowerIntrinsicArgAs::Value;
+constexpr auto asAddr = Fortran::lower::LowerIntrinsicArgAs::Addr;
 constexpr auto asBox = Fortran::lower::LowerIntrinsicArgAs::Box;
 constexpr auto asInquired = Fortran::lower::LowerIntrinsicArgAs::Inquired;
 using I = IntrinsicLibrary;
@@ -335,6 +337,10 @@ static constexpr bool handleDynamicOptional = true;
 static constexpr IntrinsicHandler handlers[]{
     {"abs", &I::genAbs},
     {"aimag", &I::genAimag},
+    {"all",
+     &I::genAll,
+     {{{"mask", asAddr}, {"dim", asValue}}},
+     /*isElemental=*/false},
     {"associated",
      &I::genAssociated,
      {{{"pointer", asInquired}, {"target", asInquired}}},
@@ -1067,6 +1073,52 @@ mlir::Value IntrinsicLibrary::genAimag(mlir::Type resultType,
       args[0], true /* isImagPart */);
 }
 
+// ALL
+fir::ExtendedValue
+IntrinsicLibrary::genAll(mlir::Type resultType,
+                         llvm::ArrayRef<fir::ExtendedValue> args) {
+
+  assert(args.size() == 2);
+  // Handle required mask argument
+  mlir::Value mask = builder.createBox(loc, args[0]);
+
+  fir::BoxValue maskArry = builder.createBox(loc, args[0]);
+  int rank = maskArry.rank();
+  assert(rank >= 1);
+
+  // Handle optional dim argument
+  bool absentDim = isAbsent(args[1]);
+  mlir::Value dim =
+      absentDim ? builder.createIntegerConstant(loc, builder.getIndexType(), 1)
+                : fir::getBase(args[1]);
+
+  if (rank == 1 || absentDim)
+    return builder.createConvert(loc, resultType,
+                                 fir::runtime::genAll(builder, loc, mask, dim));
+
+  // else use the result descriptor AllDim() intrinsic
+
+  // Create mutable fir.box to be passed to the runtime for the result.
+
+  mlir::Type resultArrayType = builder.getVarLenSeqTy(resultType, rank - 1);
+  fir::MutableBoxValue resultMutableBox =
+      fir::factory::createTempMutableBox(builder, loc, resultArrayType);
+  mlir::Value resultIrBox =
+      fir::factory::getMutableIRBox(builder, loc, resultMutableBox);
+
+  // Call runtime. The runtime is allocating the result.
+  fir::runtime::genAllDescriptor(builder, loc, resultIrBox, mask, dim);
+  return fir::factory::genMutableBoxRead(builder, loc, resultMutableBox)
+      .match(
+          [&](const fir::ArrayBoxValue &box) -> fir::ExtendedValue {
+            addCleanUpForTemp(loc, box.getAddr());
+            return box;
+          },
+          [&](const auto &) -> fir::ExtendedValue {
+            fir::emitFatalError(loc, "Invalid result for ALL");
+          });
+}
+
 // ASSOCIATED
 fir::ExtendedValue
 IntrinsicLibrary::genAssociated(mlir::Type resultType,
diff --git a/flang/test/Lower/Intrinsics/all.f90 b/flang/test/Lower/Intrinsics/all.f90
new file mode 100644
index 0000000000000..35188d9ccd043
--- /dev/null
+++ b/flang/test/Lower/Intrinsics/all.f90
@@ -0,0 +1,31 @@
+! RUN: bbc -emit-fir %s -o - | FileCheck %s
+
+! CHECK-LABEL: all_test
+! CHECK-SAME: %[[arg0:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>{{.*}}) -> !fir.logical<4>
+logical function all_test(mask)
+logical :: mask(:)
+! CHECK: %[[c1:.*]] = arith.constant 1 : index
+! CHECK: %[[a1:.*]] = fir.convert %[[arg0]] : (!fir.box<!fir.array<?x!fir.logical<4>>>) -> !fir.box<none>
+! CHECK: %[[a2:.*]] = fir.convert %[[c1]] : (index) -> i32
+all_test = all(mask)
+! CHECK:  %[[a3:.*]] = fir.call @_FortranAAll(%[[a1]], %{{.*}}, %{{.*}}, %[[a2]]) : (!fir.box<none>, !fir.ref<i8>, i32, i32) -> i1
+end function all_test
+
+! CHECK-LABEL: all_test2
+! CHECK-SAME: %[[arg0:.*]]: !fir.box<!fir.array<?x?x!fir.logical<4>>>
+! CHECK-SAME: %[[arg1:.*]]: !fir.ref<i32>
+! CHECK-SAME: %[[arg2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
+subroutine all_test2(mask, d, rslt)
+logical :: mask(:,:)
+integer :: d
+logical :: rslt(:)
+! CHECK:  %[[a0:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>
+! CHECK:  %[[a1:.*]] = fir.load %[[arg1:.*]] : !fir.ref<i32>
+! CHECK:  %[[a6:.*]] = fir.convert %[[a0:.*]] : (!fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK:  %[[a7:.*]] = fir.convert %[[arg0:.*]]: (!fir.box<!fir.array<?x?x!fir.logical<4>>>) -> !fir.box<none>
+rslt = all(mask, d)
+! CHECK:  %[[r1:.*]] = fir.call @_FortranAAllDim(%[[a6:.*]], %[[a7:.*]], %[[a1:.*]], %{{.*}}, %{{.*}}) : (!fir.ref<!fir.box<none>>, !fir.box<none>, i32, !fir.ref<i8>, i32) -> none
+! CHECK:  %[[a10:.*]] = fir.load %[[a0:.*]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>>
+! CHECK:  %[[a12:.*]] = fir.box_addr %[[a10:.*]] : (!fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>) -> !fir.heap<!fir.array<?x!fir.logical<4>>>
+! CHECK:  fir.freemem %[[a12:.*]]
+end subroutine