[llvm] [libsycl] Generic code cleanup (PR #224330)

Kseniya Tikhomirova via llvm-commits llvm-commits at lists.llvm.org
Wed Sep 30 05:51:03 PDT 2026


https://github.com/KseniyaTikhomirova updated https://github.com/llvm/llvm-project/pull/224330

>From 382bb2b857db44d30bd2b2179880f5ab55efb19a Mon Sep 17 00:00:00 2001
From: "Tikhomirova, Kseniya" <kseniya.tikhomirova at intel.com>
Date: Thu, 17 Sep 2026 08:01:24 -0700
Subject: [PATCH] [libsycl] Code style cleanup

Signed-off-by: Tikhomirova, Kseniya <kseniya.tikhomirova at intel.com>
---
 libsycl/include/sycl/__impl/backend.hpp       |   1 -
 libsycl/include/sycl/__impl/context.hpp       |  15 +-
 libsycl/include/sycl/__impl/detail/config.hpp |   3 +-
 .../sycl/__impl/detail/kernel_arg_helpers.hpp |  24 +-
 .../sycl/__impl/detail/kernel_submission.hpp  |  22 +-
 .../sycl/__impl/detail/linearization.hpp      |   5 +-
 .../include/sycl/__impl/detail/obj_utils.hpp  |   7 +-
 .../sycl/__impl/detail/unified_range_view.hpp |   6 +-
 libsycl/include/sycl/__impl/device.hpp        |  44 ++--
 .../include/sycl/__impl/device_selector.hpp   |  40 ++--
 libsycl/include/sycl/__impl/event.hpp         |   1 +
 libsycl/include/sycl/__impl/exception.hpp     |  23 +-
 libsycl/include/sycl/__impl/group.hpp         |  17 +-
 libsycl/include/sycl/__impl/group_barrier.hpp |  14 +-
 libsycl/include/sycl/__impl/handler.hpp       |   8 +-
 .../sycl/__impl/index_space_classes.hpp       | 113 +++++----
 libsycl/include/sycl/__impl/nd_item.hpp       |  44 ++--
 libsycl/include/sycl/__impl/platform.hpp      |  10 +-
 libsycl/include/sycl/__impl/queue.hpp         |  26 ++-
 libsycl/include/sycl/__impl/sub_group.hpp     |   4 +-
 libsycl/include/sycl/__impl/usm_functions.hpp |  15 +-
 libsycl/include/sycl/__spirv/spirv_types.hpp  |   4 +-
 libsycl/include/sycl/__spirv/spirv_vars.hpp   |  20 +-
 libsycl/include/sycl/sycl.hpp                 |   6 +
 libsycl/src/context.cpp                       |   7 +-
 libsycl/src/detail/context_impl.cpp           |  10 +-
 libsycl/src/detail/context_impl.hpp           |  31 +--
 .../src/detail/device_binary_structures.hpp   |   6 +-
 libsycl/src/detail/device_image_wrapper.cpp   |   5 +-
 libsycl/src/detail/device_image_wrapper.hpp   |  11 +-
 libsycl/src/detail/device_impl.hpp            |  36 +--
 libsycl/src/detail/device_kernel_info.hpp     |   8 +-
 libsycl/src/detail/event_impl.cpp             |   2 +
 libsycl/src/detail/event_impl.hpp             |   7 +-
 libsycl/src/detail/global_objects.cpp         |  14 +-
 libsycl/src/detail/global_objects.hpp         |  11 +-
 libsycl/src/detail/handler_impl.hpp           |   8 +-
 .../src/detail/offload/offload_topology.hpp   |  19 +-
 libsycl/src/detail/offload/offload_utils.cpp  |   1 +
 libsycl/src/detail/offload/offload_utils.hpp  |  80 ++++---
 libsycl/src/detail/platform_impl.cpp          |  12 +-
 libsycl/src/detail/platform_impl.hpp          |  36 +--
 libsycl/src/detail/program_manager.cpp        |  49 ++--
 libsycl/src/detail/program_manager.hpp        |   8 +-
 libsycl/src/detail/queue_impl.cpp             |  47 ++--
 libsycl/src/detail/queue_impl.hpp             |  36 +--
 libsycl/src/detail/spinlock.hpp               |   6 +-
 .../src/detail/suppress_extra_warnings.hpp    |   6 +-
 libsycl/src/device.cpp                        |  37 ++-
 libsycl/src/device_selector.cpp               |  32 +--
 libsycl/src/event.cpp                         |  17 +-
 libsycl/src/exception.cpp                     |  12 +-
 libsycl/src/exception_list.cpp                |  12 +-
 libsycl/src/handler.cpp                       |  12 +-
 libsycl/src/platform.cpp                      |  14 +-
 libsycl/src/queue.cpp                         |  21 +-
 libsycl/src/usm_functions.cpp                 |  36 +--
 libsycl/test/basic/context.cpp                |  45 ++--
 libsycl/test/basic/get_backend.cpp            |  31 +--
 libsycl/test/basic/group.cpp                  |   4 +-
 libsycl/test/basic/group_barrier.cpp          |   2 +-
 .../test/basic/group_barrier_device_code.cpp  |  30 +--
 libsycl/test/basic/group_local_id.cpp         |   4 +-
 .../handler_parallel_for_generic_lambda.cpp   |  36 +--
 ...parallel_for_nd_range_invalid_arg_type.cpp |   6 +-
 .../handler/handler_parallel_for_runtime.cpp  | 174 +++++++-------
 ... => handler_single_task_named_functor.cpp} |   8 +-
 .../basic/handler/submit_fn_ptr_handler.cpp   |  20 +-
 libsycl/test/basic/index_space_classes.cpp    |  12 +-
 .../test/basic/khr_get_default_context.cpp    |   8 +-
 libsycl/test/basic/linear_sub_group.cpp       |   3 +-
 libsycl/test/basic/nd_range.cpp               |  64 +++---
 libsycl/test/basic/parallel_for_indexers.cpp  |  49 ++--
 libsycl/test/basic/platform_get_devices.cpp   |  33 +--
 .../test/basic/queue_parallel_for_generic.cpp |  52 ++---
 libsycl/test/basic/queue_single_task.cpp      |  20 ++
 .../basic/sub_group_by_value_semantics.cpp    |   2 +-
 libsycl/test/basic/sub_group_common.cpp       |   2 +-
 libsycl/test/basic/submit_fn_ptr.cpp          |  20 --
 libsycl/test/basic/wrapped_usm_pointers.cpp   |  24 +-
 .../test/usm/Inputs/fill_memset_common.hpp    |   6 +
 libsycl/test/usm/alloc_functions.cpp          | 214 +++++++++---------
 libsycl/test/usm/memcpy.cpp                   |   7 +-
 libsycl/test/usm/prefetch.cpp                 |   1 +
 libsycl/tools/sycl-ls/sycl-ls.cpp             |  39 ++--
 libsycl/unittests/common/unittests_helper.hpp |   2 +-
 libsycl/unittests/context/context_ctors.cpp   |   8 +
 libsycl/unittests/handler/memcpy.cpp          |   8 +
 libsycl/unittests/handler/semantics.cpp       |  11 +-
 libsycl/unittests/handler/test_helpers.hpp    |  24 +-
 libsycl/unittests/mock/helpers.cpp            |  37 ++-
 libsycl/unittests/mock/helpers.hpp            |   6 +-
 libsycl/unittests/queue/memcpy.cpp            |   9 +-
 libsycl/unittests/queue/prefetch.cpp          |  10 +
 94 files changed, 1169 insertions(+), 983 deletions(-)
 rename libsycl/test/basic/handler/{handler_unnamed_lambda_functor.cpp => handler_single_task_named_functor.cpp} (52%)
 create mode 100644 libsycl/test/basic/queue_single_task.cpp
 delete mode 100644 libsycl/test/basic/submit_fn_ptr.cpp

diff --git a/libsycl/include/sycl/__impl/backend.hpp b/libsycl/include/sycl/__impl/backend.hpp
index 8dc5711d16b3d..60a9180ab3ed0 100644
--- a/libsycl/include/sycl/__impl/backend.hpp
+++ b/libsycl/include/sycl/__impl/backend.hpp
@@ -18,7 +18,6 @@
 
 #include <sycl/__impl/detail/config.hpp>
 
-#include <string_view>
 #include <type_traits>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
diff --git a/libsycl/include/sycl/__impl/context.hpp b/libsycl/include/sycl/__impl/context.hpp
index 523cb913a3e9d..9895dbc8bc176 100644
--- a/libsycl/include/sycl/__impl/context.hpp
+++ b/libsycl/include/sycl/__impl/context.hpp
@@ -27,7 +27,11 @@
 #include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/detail/obj_utils.hpp>
 
+#include <functional>
 #include <memory>
+#include <string>
+#include <system_error>
+#include <utility>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
@@ -65,13 +69,13 @@ class _LIBSYCL_EXPORT context {
 
   /// Constructs a SYCL context containing all devices in \p plt.
   ///
-  /// \throws an exception with code errc::invalid if \p plt has no devices.
+  /// \throw sycl::exception with sycl::errc::invalid if \p plt has no devices.
   explicit context(const platform &plt, const property_list &propList = {})
       : context(plt.get_devices(), propList) {}
 
   /// Constructs a SYCL context containing all devices in \p plt.
   ///
-  /// \throws an exception with code errc::invalid if \p plt has no devices.
+  /// \throw sycl::exception with sycl::errc::invalid if \p plt has no devices.
   explicit context(const platform &plt, async_handler asyncHandler,
                    const property_list &propList = {})
       : context(plt.get_devices(), asyncHandler, propList) {}
@@ -79,7 +83,7 @@ class _LIBSYCL_EXPORT context {
   /// Constructs a SYCL context associated with each device in \p deviceList.
   /// All devices in \p deviceList must belong to the same platform.
   ///
-  /// \throws an exception with code errc::invalid if \p deviceList is empty.
+  /// \throw sycl::exception with sycl::errc::invalid if \p deviceList is empty.
   explicit context(const std::vector<device> &deviceList,
                    const property_list &propList = {})
       : context(deviceList, detail::defaultAsyncHandler, propList) {}
@@ -87,7 +91,7 @@ class _LIBSYCL_EXPORT context {
   /// Constructs a SYCL context associated with each device in \p deviceList.
   /// All devices in \p deviceList must belong to the same platform.
   ///
-  /// \throws an exception with code errc::invalid if \p deviceList is empty.
+  /// \throw sycl::exception with sycl::errc::invalid if \p deviceList is empty.
   explicit context(const std::vector<device> &deviceList,
                    async_handler asyncHandler,
                    const property_list &propList = {});
@@ -143,7 +147,8 @@ class _LIBSYCL_EXPORT context {
 // context.hpp.
 inline exception::exception(context ctx, std::error_code ec,
                             const std::string &what_arg)
-    : exception(ec, std::make_shared<context>(ctx), what_arg.c_str()) {}
+    : exception(ec, std::make_shared<context>(std::move(ctx)),
+                what_arg.c_str()) {}
 
 inline exception::exception(context ctx, std::error_code ec,
                             const char *what_arg)
diff --git a/libsycl/include/sycl/__impl/detail/config.hpp b/libsycl/include/sycl/__impl/detail/config.hpp
index e565e41cb3848..004e75f411372 100644
--- a/libsycl/include/sycl/__impl/detail/config.hpp
+++ b/libsycl/include/sycl/__impl/detail/config.hpp
@@ -21,7 +21,8 @@
 #define _LIBSYCL_END_UNVERSIONED_NAMESPACE_SYCL }
 
 #define _LIBSYCL_BEGIN_NAMESPACE_SYCL                                          \
-  _LIBSYCL_BEGIN_UNVERSIONED_NAMESPACE_SYCL inline namespace _LIBSYCL_ABI_NAMESPACE {
+  _LIBSYCL_BEGIN_UNVERSIONED_NAMESPACE_SYCL                                    \
+  inline namespace _LIBSYCL_ABI_NAMESPACE {
 #define _LIBSYCL_END_NAMESPACE_SYCL                                            \
   }                                                                            \
   _LIBSYCL_END_UNVERSIONED_NAMESPACE_SYCL
diff --git a/libsycl/include/sycl/__impl/detail/kernel_arg_helpers.hpp b/libsycl/include/sycl/__impl/detail/kernel_arg_helpers.hpp
index 1e8980a7fa9af..f06e3e67aa34a 100644
--- a/libsycl/include/sycl/__impl/detail/kernel_arg_helpers.hpp
+++ b/libsycl/include/sycl/__impl/detail/kernel_arg_helpers.hpp
@@ -11,8 +11,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS
-#define _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS
+#ifndef _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS_HPP
+#define _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS_HPP
 
 #include <sycl/__impl/index_space_classes.hpp>
 #include <sycl/__impl/nd_item.hpp>
@@ -22,6 +22,7 @@
 #include <sycl/__spirv/spirv_vars.hpp>
 
 #include <type_traits>
+#include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -76,21 +77,21 @@ struct CheckFunctionSignature<F, RetT(Args...)> {
 /// \name  Helpers to extract types of lambda arguments.
 /// @{
 template <typename RetType, typename Func, typename Arg>
-[[maybe_unused]] static Arg member_ptr_helper(RetType (Func::*)(Arg) const);
+[[maybe_unused]] static Arg memberPtrHelper(RetType (Func::*)(Arg) const);
 
 // Non-const version of the above template to match functors whose
 // 'operator()' is declared w/o the 'const' qualifier.
 template <typename RetType, typename Func, typename Arg>
-[[maybe_unused]] static Arg member_ptr_helper(RetType (Func::*)(Arg));
+[[maybe_unused]] static Arg memberPtrHelper(RetType (Func::*)(Arg));
 
 template <typename F, typename SuggestedArgType>
-decltype(member_ptr_helper(&F::operator())) argument_helper(int);
+decltype(memberPtrHelper(&F::operator())) argumentHelper(int);
 
 template <typename F, typename SuggestedArgType>
-SuggestedArgType argument_helper(...);
+SuggestedArgType argumentHelper(...);
 
 template <typename F, typename SuggestedArgType>
-using lambda_arg_type = decltype(argument_helper<F, SuggestedArgType>(0));
+using lambda_arg_type = decltype(argumentHelper<F, SuggestedArgType>(0));
 
 #if __has_builtin(__type_pack_element)
 template <int N, typename... Ts>
@@ -111,8 +112,7 @@ using nth_type_t = typename nth_type<N, Ts...>::type;
 
 template <typename T> T *declptr() { return static_cast<T *>(nullptr); }
 
-template <int N>
-static inline constexpr bool isValidDimensions = (N > 0) && (N < 4);
+template <int N> inline constexpr bool isValidDimensions = (N > 0) && (N < 4);
 
 /// Class provides helper functions for iteration space coordinates in kernel
 /// invocation on device.
@@ -136,7 +136,7 @@ class Builder {
   /// Constructs item with the given data.
   /// \param Extent a range representing the dimensions of the range of possible
   /// values of the item.
-  /// \param Index a constituent id representing the work-item’s position in the
+  /// \param Index a constituent id representing the work-item's position in the
   /// iteration space.
   /// \param Offset an id representing the n-dimensional offset that should be
   /// added to the global-ID of each work-item, if this item represents a global
@@ -151,7 +151,7 @@ class Builder {
   /// Constructs item with the given data.
   /// \param Extent a range representing the dimensions of the range of possible
   /// values of the item.
-  /// \param Index a constituent id representing the work-item’s position in the
+  /// \param Index a constituent id representing the work-item's position in the
   /// iteration space.
   template <int Dims, bool WithOffset>
   static std::enable_if_t<!WithOffset, item<Dims, WithOffset>>
@@ -192,4 +192,4 @@ class Builder {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS
+#endif // _LIBSYCL___IMPL_DETAIL_KERNEL_ARG_HELPERS_HPP
diff --git a/libsycl/include/sycl/__impl/detail/kernel_submission.hpp b/libsycl/include/sycl/__impl/detail/kernel_submission.hpp
index b7381c46bf820..9f403079b8b19 100644
--- a/libsycl/include/sycl/__impl/detail/kernel_submission.hpp
+++ b/libsycl/include/sycl/__impl/detail/kernel_submission.hpp
@@ -23,6 +23,7 @@
 #include <sycl/__impl/nd_range.hpp>
 
 #include <tuple>
+#include <type_traits>
 #include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
@@ -30,10 +31,10 @@ _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
 
 template <int Dims>
-void checkNDRangeAndThrow(const sycl::nd_range<Dims> executionRange) {
-  if (executionRange.get_global_range() != range<Dims>{} &&
-      (executionRange.get_local_range().size() == 0 ||
-       executionRange.get_global_range() % executionRange.get_local_range() !=
+void checkNDRangeAndThrow(const sycl::nd_range<Dims> &ExecutionRange) {
+  if (ExecutionRange.get_global_range() != range<Dims>{} &&
+      (ExecutionRange.get_local_range().size() == 0 ||
+       ExecutionRange.get_global_range() % ExecutionRange.get_local_range() !=
            range<Dims>{}))
     throw sycl::exception(sycl::make_error_code(sycl::errc::nd_range),
                           "Invalid nd_range submission: global size must be "
@@ -59,13 +60,13 @@ template <typename DerivedT> class KernelSubmissionBase {
   }
 
   template <typename KN, typename... Args>
-  void sycl_kernel_launch(const char *KernelName, Args &&...args) {
+  void sycl_kernel_launch(const char *KernelName, Args &&...KernelArgs) {
     static_assert(
-        sizeof...(args) == 1,
+        sizeof...(KernelArgs) == 1,
         "sycl_kernel_launch expects only 2 arguments now: name of kernel and "
         "callable object passed to kernel invocation by the user.");
 
-    auto FirstArg = std::get<0>(std::tie(args...));
+    auto FirstArg = std::get<0>(std::tie(KernelArgs...));
     static_cast<DerivedT *>(this)->submitKernelImpl(
         detail::getDeviceKernelInfo<KN>(KernelName), &FirstArg,
         sizeof(FirstArg));
@@ -73,9 +74,10 @@ template <typename DerivedT> class KernelSubmissionBase {
 
   template <typename KernelName, int Dims, template <int> class Range,
             typename... Rest>
-  void parallelForImpl(Range<Dims> numWorkItems, Rest &&...rest) {
+  void parallelForImpl(const Range<Dims> & /*NumWorkItems*/,
+                       Rest &&...RestArgs) {
     if constexpr (sizeof...(Rest) != 1)
-      throw sycl::exception(errc::feature_not_supported,
+      throw sycl::exception(sycl::make_error_code(errc::feature_not_supported),
                             "Reductions are not supported");
 
     using KernelType =
@@ -111,7 +113,7 @@ template <typename DerivedT> class KernelSubmissionBase {
     using NameT =
         typename detail::get_kernel_name_t<KernelName, KernelType>::name;
     return submitParallelFor<NameT, TransformedLambdaArgType, KernelType>(
-        std::forward<Rest>(rest)...);
+        std::forward<Rest>(RestArgs)...);
   }
 };
 
diff --git a/libsycl/include/sycl/__impl/detail/linearization.hpp b/libsycl/include/sycl/__impl/detail/linearization.hpp
index c1ad4151f6aa8..2dbd75505859d 100644
--- a/libsycl/include/sycl/__impl/detail/linearization.hpp
+++ b/libsycl/include/sycl/__impl/detail/linearization.hpp
@@ -15,6 +15,7 @@
 #ifndef _LIBSYCL___IMPL_DETAIL_LINEARIZATION_HPP
 #define _LIBSYCL___IMPL_DETAIL_LINEARIZATION_HPP
 
+#include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/index_space_classes.hpp>
 
 #include <cstddef>
@@ -24,8 +25,8 @@ _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
 
 template <int Dimensions>
-inline std::size_t linearize_id(const id<Dimensions> &Index,
-                                const range<Dimensions> &Extent) noexcept {
+inline std::size_t linearizeId(const id<Dimensions> &Index,
+                               const range<Dimensions> &Extent) noexcept {
   if constexpr (Dimensions == 1) {
     return Index[0];
   } else if constexpr (Dimensions == 2) {
diff --git a/libsycl/include/sycl/__impl/detail/obj_utils.hpp b/libsycl/include/sycl/__impl/detail/obj_utils.hpp
index 8a3518be41698..2e466937051f4 100644
--- a/libsycl/include/sycl/__impl/detail/obj_utils.hpp
+++ b/libsycl/include/sycl/__impl/detail/obj_utils.hpp
@@ -18,8 +18,9 @@
 #include <sycl/__impl/detail/config.hpp>
 
 #include <cassert>
+#include <cstddef>
+#include <functional>
 #include <memory>
-#include <optional>
 #include <type_traits>
 #include <utility>
 #include <vector>
@@ -30,9 +31,9 @@ namespace detail {
 
 // SYCL interface classes are required to contain an `impl` data member
 // which points to the corresponding implementation object. The data
-// member is required to be accessible by the `ImpUtils` class. SYCL
+// member is required to be accessible by the `ImplUtils` class. SYCL
 // interface classes that declare the data member private or protected
-// are required to befriend the `ImpUtils` class.
+// are required to befriend the `ImplUtils` class.
 struct ImplUtils {
   // Helper function to access an implementation object from a SYCL interface
   // object.
diff --git a/libsycl/include/sycl/__impl/detail/unified_range_view.hpp b/libsycl/include/sycl/__impl/detail/unified_range_view.hpp
index ed8b789b47b88..1555e6a5ef0ff 100644
--- a/libsycl/include/sycl/__impl/detail/unified_range_view.hpp
+++ b/libsycl/include/sycl/__impl/detail/unified_range_view.hpp
@@ -19,6 +19,8 @@
 #include <sycl/__impl/index_space_classes.hpp>
 #include <sycl/__impl/nd_range.hpp>
 
+#include <cstddef>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
@@ -36,12 +38,12 @@ struct UnifiedRangeView {
 
   template <int Dims>
   UnifiedRangeView(sycl::range<Dims> &N)
-      : MGlobalSize(&(N[0])), MDims(size_t(Dims)) {}
+      : MGlobalSize(&(N[0])), MDims(static_cast<size_t>(Dims)) {}
 
   template <int Dims>
   UnifiedRangeView(sycl::nd_range<Dims> &N)
       : MGlobalSize(&(N.MGlobalSize[0])), MLocalSize(&(N.MLocalSize[0])),
-        MOffset(&(N.MOffset[0])), MDims{size_t(Dims)} {}
+        MOffset(&(N.MOffset[0])), MDims(static_cast<size_t>(Dims)) {}
 
   UnifiedRangeView(const size_t *GlobalSize, const size_t *LocalSize,
                    const size_t *Offset, size_t Dims)
diff --git a/libsycl/include/sycl/__impl/device.hpp b/libsycl/include/sycl/__impl/device.hpp
index fa4c888d66582..432d8f07b1106 100644
--- a/libsycl/include/sycl/__impl/device.hpp
+++ b/libsycl/include/sycl/__impl/device.hpp
@@ -23,6 +23,11 @@
 #include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/detail/obj_utils.hpp>
 
+#include <cstddef>
+#include <functional>
+#include <type_traits>
+#include <vector>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 class platform;
@@ -56,7 +61,7 @@ class _LIBSYCL_EXPORT device {
 
   /// Constructs a SYCL device instance using the device
   /// identified by the provided device selector.
-  /// \param DeviceSelector is SYCL 2020 device selector, a simple callable that
+  /// \param deviceSelector is SYCL 2020 device selector, a simple callable that
   /// takes a device and returns an int.
   template <
       typename DeviceSelector,
@@ -96,7 +101,7 @@ class _LIBSYCL_EXPORT device {
   platform get_platform() const;
 
   /// Queries this SYCL device for information requested by the template
-  /// parameter param.
+  /// parameter Param.
   ///
   /// \return device info of type described in 4.6.4.4.
   template <typename Param>
@@ -111,62 +116,63 @@ class _LIBSYCL_EXPORT device {
 
   /// Queries which optional features this device supports (if any).
   ///
+  /// \param asp is one of the values defined in SYCL 2020 Section 4.6.4.5.
   /// \return true if this device has the given aspect.
   bool has(aspect asp) const;
 
   /// Partition device into sub devices.
   ///
-  /// Available only when prop is info::partition_property::partition_equally.
+  /// Available only when Prop is info::partition_property::partition_equally.
   /// If this SYCL device does not support
   /// info::partition_property::partition_equally a feature_not_supported
   /// exception will be thrown.
   ///
-  /// \param ComputeUnits is a desired count of compute units in each sub
+  /// \param count is a desired count of compute units in each sub
   /// device.
   /// \return sub devices partitioned from this SYCL device equally based on the
-  /// ComputeUnits parameter.
-  template <info::partition_property prop>
-  std::vector<device> create_sub_devices(size_t ComputeUnits) const;
+  /// count parameter.
+  template <info::partition_property Prop>
+  std::vector<device> create_sub_devices(std::size_t count) const;
 
   /// Partition device into sub devices.
   ///
-  /// Available only when prop is info::partition_property::partition_by_counts.
+  /// Available only when Prop is info::partition_property::partition_by_counts.
   /// If this SYCL device does not support
   /// info::partition_property::partition_by_counts a feature_not_supported
   /// exception will be thrown.
   ///
-  /// \param Counts is a std::vector of desired compute units in sub devices.
+  /// \param counts is a std::vector of desired compute units in sub devices.
   /// \return sub devices partitioned from this SYCL device by count sizes based
-  /// on the Counts parameter.
-  template <info::partition_property prop>
+  /// on the counts parameter.
+  template <info::partition_property Prop>
   std::vector<device>
-  create_sub_devices(const std::vector<size_t> &Counts) const;
+  create_sub_devices(const std::vector<std::size_t> &counts) const;
 
   /// Partition device into sub devices.
   ///
-  /// Available only when prop is
+  /// Available only when Prop is
   /// info::partition_property::partition_by_affinity_domain. If this SYCL
   /// device does not support
   /// info::partition_property::partition_by_affinity_domain or the SYCL device
   /// does not support provided info::affinity_domain provided a
   /// feature_not_supported exception will be thrown.
   ///
-  /// \param AffinityDomain is one of the values described in Table 4.20 of the
+  /// \param affinityDomain is one of the values described in Table 4.20 of the
   /// SYCL 2020 specification.
   /// \return sub devices partitioned from this SYCL device by affinity domain
-  /// based on the AffinityDomain parameter.
-  template <info::partition_property prop>
+  /// based on the affinityDomain parameter.
+  template <info::partition_property Prop>
   std::vector<device>
-  create_sub_devices(info::partition_affinity_domain AffinityDomain) const;
+  create_sub_devices(info::partition_affinity_domain affinityDomain) const;
 
   /// Query available SYCL devices.
   ///
-  /// \param deviceType is one of the values described in A.3 of the SYCL 2020
+  /// \param type is one of the values described in A.3 of the SYCL 2020
   /// specification.
   /// \return all SYCL devices available in the system of the device type
   /// specified.
   static std::vector<device>
-  get_devices(info::device_type deviceType = info::device_type::all);
+  get_devices(info::device_type type = info::device_type::all);
 
 private:
   device(detail::DeviceImpl &Impl) : impl(&Impl) {}
diff --git a/libsycl/include/sycl/__impl/device_selector.hpp b/libsycl/include/sycl/__impl/device_selector.hpp
index 00a5f0ec594bf..b38d0b6009862 100644
--- a/libsycl/include/sycl/__impl/device_selector.hpp
+++ b/libsycl/include/sycl/__impl/device_selector.hpp
@@ -19,6 +19,8 @@
 #include <sycl/__impl/detail/config.hpp>
 
 #include <functional>
+#include <type_traits>
+#include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -49,59 +51,59 @@ SelectDevice(const DeviceSelectorInvocableType &DeviceSelector);
 /// Standard device selector to select SYCL device from any supported SYCL
 /// backend based on an implementation-defined heuristic.
 ///
-/// \param Dev device to calculate the score for.
+/// \param dev device to calculate the score for.
 /// \return score value for the provided device. Further device selection is
 /// based on score values.
-_LIBSYCL_EXPORT int default_selector_v(const device &Dev);
+_LIBSYCL_EXPORT int default_selector_v(const device &dev);
 
 /// Standard device selector to select SYCL device from any supported SYCL
 /// backend for which the device type is info::device_type::gpu.
 ///
-/// \param Dev device to calculate the score for.
+/// \param dev device to calculate the score for.
 /// \return score value for the provided device. Further device selection is
 /// based on score values.
-_LIBSYCL_EXPORT int gpu_selector_v(const device &Dev);
+_LIBSYCL_EXPORT int gpu_selector_v(const device &dev);
 
 /// Standard device selector to select SYCL device from any supported SYCL
 /// backend for which the device type is info::device_type::cpu.
 ///
-/// \param Dev device to calculate the score for.
+/// \param dev device to calculate the score for.
 /// \return score value for the provided device. Further device selection is
 /// based on score values.
-_LIBSYCL_EXPORT int cpu_selector_v(const device &Dev);
+_LIBSYCL_EXPORT int cpu_selector_v(const device &dev);
 
 /// Standard device selector to select SYCL device from any supported SYCL
 /// backend for which the device type is info::device_type::accelerator.
 ///
-/// \param Dev device to calculate the score for.
+/// \param dev device to calculate the score for.
 /// \return score value for the provided device. Further device selection is
 /// based on score values.
-_LIBSYCL_EXPORT int accelerator_selector_v(const device &Dev);
+_LIBSYCL_EXPORT int accelerator_selector_v(const device &dev);
 
 /// Returns a selector object that selects a SYCL device from any supported SYCL
 /// backend which contains all the requested aspects.
 ///
-/// \param RequireList requested aspects,  i.e. for the specific device dev and
-/// each aspect devAspect from RequireList dev.has(devAspect) equals true.
-/// \param DenyList all the aspects that have to be avoided, i.e. for the
+/// \param aspectList requested aspects,  i.e. for the specific device dev and
+/// each aspect devAspect from aspectList dev.has(devAspect) equals true.
+/// \param denyList all the aspects that have to be avoided, i.e. for the
 /// specific device dev and each aspect devAspect from denyList
 /// dev.has(devAspect) equals false.
 /// \return a selector object
 _LIBSYCL_EXPORT detail::DeviceSelectorInvocableType
-aspect_selector(const std::vector<aspect> &RequireList,
-                const std::vector<aspect> &DenyList = {});
+aspect_selector(const std::vector<aspect> &aspectList,
+                const std::vector<aspect> &denyList = {});
 
 /// Returns a selector object that selects a SYCL device from any supported SYCL
 /// backend which contains all the requested aspects.
 ///
-/// \param AspectList requested aspects,  i.e. for the specific device dev and
-/// each aspect devAspect from AspectList dev.has(devAspect) equals true.
+/// \param aspectList requested aspects,  i.e. for the specific device dev and
+/// each aspect devAspect from aspectList dev.has(devAspect) equals true.
 /// \return a selector object
 template <typename... AspectListT>
-detail::DeviceSelectorInvocableType aspect_selector(AspectListT... AspectList) {
+detail::DeviceSelectorInvocableType aspect_selector(AspectListT... aspectList) {
   std::vector<aspect> RequireList;
-  RequireList.reserve(sizeof...(AspectList));
-  (RequireList.emplace_back(AspectList), ...);
+  RequireList.reserve(sizeof...(aspectList));
+  (RequireList.emplace_back(aspectList), ...);
 
   return aspect_selector(RequireList, {});
 }
@@ -119,4 +121,4 @@ detail::DeviceSelectorInvocableType aspect_selector() {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif //_LIBSYCL___IMPL_DEVICE_SELECTOR_HPP
+#endif // _LIBSYCL___IMPL_DEVICE_SELECTOR_HPP
diff --git a/libsycl/include/sycl/__impl/event.hpp b/libsycl/include/sycl/__impl/event.hpp
index c9a4b67006cd2..a307c21a980c0 100644
--- a/libsycl/include/sycl/__impl/event.hpp
+++ b/libsycl/include/sycl/__impl/event.hpp
@@ -22,6 +22,7 @@
 #include <sycl/__impl/info/desc_base.hpp>
 #include <sycl/__impl/info/event.hpp>
 
+#include <functional>
 #include <memory>
 #include <vector>
 
diff --git a/libsycl/include/sycl/__impl/exception.hpp b/libsycl/include/sycl/__impl/exception.hpp
index c3c8ff32a1e05..2df0c74d7db6e 100644
--- a/libsycl/include/sycl/__impl/exception.hpp
+++ b/libsycl/include/sycl/__impl/exception.hpp
@@ -17,6 +17,7 @@
 
 #include <sycl/__impl/detail/config.hpp>
 
+#include <cstddef>
 #include <exception>
 #include <memory>
 #include <string>
@@ -56,7 +57,7 @@ enum class errc : int {
 ///
 /// \param e SYCL 2020 error code.
 ///
-/// \returns constructed error code.
+/// \return constructed error code.
 _LIBSYCL_EXPORT std::error_code make_error_code(sycl::errc e) noexcept;
 
 /// Obtains a reference to the static error category object for SYCL errors.
@@ -67,7 +68,7 @@ _LIBSYCL_EXPORT std::error_code make_error_code(sycl::errc e) noexcept;
 /// by the exception (Ex.code().value()) is one of the enumerated values in
 /// sycl::errc.
 ///
-/// \returns the error category object for SYCL errors.
+/// \return the error category object for SYCL errors.
 _LIBSYCL_EXPORT const std::error_category &sycl_category() noexcept;
 
 /// \brief SYCL 2020 exception class (4.13.2.) for sync and async error handling
@@ -136,29 +137,29 @@ class _LIBSYCL_EXPORT exception : public virtual std::exception {
 
   /// Returns the error code stored inside the exception.
   ///
-  /// \returns the error code stored inside the exception.
+  /// \return the error code stored inside the exception.
   const std::error_code &code() const noexcept;
 
   /// Returns the error category of the error code stored inside the exception.
   ///
-  /// \returns the error category of the error code stored inside the exception.
+  /// \return the error category of the error code stored inside the exception.
   const std::error_category &category() const noexcept;
 
   /// Returns string that describes the error that triggered the exception.
   ///
-  /// \returns an implementation-defined non-null constant C-style string that
+  /// \return an implementation-defined non-null constant C-style string that
   /// describes the error that triggered the exception.
   const char *what() const noexcept final;
 
   /// Checks if the exception has an associated SYCL context.
   ///
-  /// \returns true if this SYCL exception has an associated SYCL context and
+  /// \return true if this SYCL exception has an associated SYCL context and
   /// false if it does not.
   bool has_context() const noexcept;
 
   /// \return the SYCL context associated with this exception.
   ///
-  /// \throws exception with sycl::errc::invalid if this exception does not
+  /// \throw sycl::exception with sycl::errc::invalid if this exception does not
   /// have an associated context (has_context() == false).
   context get_context() const;
 
@@ -169,7 +170,7 @@ class _LIBSYCL_EXPORT exception : public virtual std::exception {
   // or context directly.
   std::shared_ptr<std::string> MMessage;
   std::shared_ptr<context> MContext;
-  std::error_code MErrC = make_error_code(sycl::errc::invalid);
+  std::error_code MErrC;
 };
 
 /// \brief Used as a container for a list of asynchronous exceptions.
@@ -184,19 +185,19 @@ class _LIBSYCL_EXPORT exception_list {
 
   /// Returns the size of the list.
   ///
-  /// \returns the size of the list.
+  /// \return the size of the list.
   size_type size() const;
 
   /// Returns an iterator to the beginning of the list of asynchronous
   /// exceptions.
   ///
-  /// \returns an iterator to the beginning of the list of asynchronous
+  /// \return an iterator to the beginning of the list of asynchronous
   /// exceptions.
   iterator begin() const;
 
   /// Returns an iterator to the end of the list of asynchronous exceptions.
   ///
-  /// \returns an iterator to the end of the list of asynchronous exceptions.
+  /// \return an iterator to the end of the list of asynchronous exceptions.
   iterator end() const;
 
 private:
diff --git a/libsycl/include/sycl/__impl/group.hpp b/libsycl/include/sycl/__impl/group.hpp
index 529ddd54f1400..67484e66b0364 100644
--- a/libsycl/include/sycl/__impl/group.hpp
+++ b/libsycl/include/sycl/__impl/group.hpp
@@ -53,7 +53,7 @@ template <int Dimensions = 1> class group {
     return get_group_id()[dimension];
   }
 
-  /// \return a SYCL id representing the calling work-item’s position within the
+  /// \return a SYCL id representing the calling work-item's position within the
   /// work-group.
   id<Dimensions> get_local_id() const noexcept {
     return __spirv::initBuiltInLocalInvocationId<Dimensions, id<Dimensions>>();
@@ -98,24 +98,22 @@ template <int Dimensions = 1> class group {
 
   /// \return the linearized work-group id within the nd-range.
   std::size_t get_group_linear_id() const noexcept {
-    return detail::linearize_id(get_group_id(), get_group_range());
+    return detail::linearizeId(get_group_id(), get_group_range());
   }
 
-  /// \return a linearized version of the calling work-item’s local id.
+  /// \return a linearized version of the calling work-item's local id.
   std::size_t get_local_linear_id() const noexcept {
-    return detail::linearize_id(get_local_id(), get_local_range());
+    return detail::linearizeId(get_local_id(), get_local_range());
   }
 
   /// \return the total number of work-groups in the nd-range.
   std::size_t get_group_linear_range() const noexcept {
-    auto groupRange = get_group_range();
-    return multiply_all_dims(groupRange);
+    return multiplyAllDims(get_group_range());
   }
 
   /// \return the total number of work-items in this work-group.
   std::size_t get_local_linear_range() const noexcept {
-    auto localRange = get_local_range();
-    return multiply_all_dims(localRange);
+    return multiplyAllDims(get_local_range());
   }
 
   /// \return true for exactly one work-item in the work-group, if the calling
@@ -128,8 +126,7 @@ template <int Dimensions = 1> class group {
 protected:
   group() = default;
 
-  static std::size_t
-  multiply_all_dims(const range<Dimensions> &Range) noexcept {
+  static std::size_t multiplyAllDims(const range<Dimensions> &Range) noexcept {
     if constexpr (Dimensions == 1) {
       return Range[0];
     } else if constexpr (Dimensions == 2) {
diff --git a/libsycl/include/sycl/__impl/group_barrier.hpp b/libsycl/include/sycl/__impl/group_barrier.hpp
index d23fb0294616f..16ba6b0dfb579 100644
--- a/libsycl/include/sycl/__impl/group_barrier.hpp
+++ b/libsycl/include/sycl/__impl/group_barrier.hpp
@@ -42,7 +42,7 @@ inline constexpr bool is_group_v = is_group<std::decay_t<T>>::value;
 
 namespace detail {
 
-static constexpr __spirv::Scope getScope(memory_scope Scope) {
+inline constexpr __spirv::Scope getScope(memory_scope Scope) {
   switch (Scope) {
   case memory_scope::work_item:
     return __spirv::Scope::Invocation;
@@ -57,13 +57,13 @@ static constexpr __spirv::Scope getScope(memory_scope Scope) {
   }
 }
 
-template <typename Group> struct group_scope {};
+template <typename Group> struct GroupScope {};
 
-template <int Dimensions> struct group_scope<group<Dimensions>> {
+template <int Dimensions> struct GroupScope<group<Dimensions>> {
   static constexpr __spirv::Scope value = __spirv::Scope::Workgroup;
 };
 
-template <> struct group_scope<::sycl::sub_group> {
+template <> struct GroupScope<::sycl::sub_group> {
   static constexpr __spirv::Scope value = __spirv::Scope::Subgroup;
 };
 
@@ -73,9 +73,9 @@ template <> struct group_scope<::sycl::sub_group> {
 /// point.
 template <typename Group>
 std::enable_if_t<is_group_v<Group>>
-group_barrier(Group /*G*/, memory_scope FenceScope = Group::fence_scope) {
-  __spirv_ControlBarrier(detail::group_scope<Group>::value,
-                         detail::getScope(FenceScope),
+group_barrier(Group /*g*/, memory_scope fence_scope = Group::fence_scope) {
+  __spirv_ControlBarrier(detail::GroupScope<Group>::value,
+                         detail::getScope(fence_scope),
                          __spirv::MemorySemanticsMask::SequentiallyConsistent |
                              __spirv::MemorySemanticsMask::SubgroupMemory |
                              __spirv::MemorySemanticsMask::WorkgroupMemory);
diff --git a/libsycl/include/sycl/__impl/handler.hpp b/libsycl/include/sycl/__impl/handler.hpp
index 099950ddc7cb8..8f486298ab04f 100644
--- a/libsycl/include/sycl/__impl/handler.hpp
+++ b/libsycl/include/sycl/__impl/handler.hpp
@@ -6,6 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 ///
+/// \file
 /// This file contains the declaration of the SYCL handler class, which provides
 /// the interface for the commands that can be executed inside the command group
 /// scope.
@@ -24,10 +25,9 @@
 #include <sycl/__impl/exception.hpp>
 #include <sycl/__impl/index_space_classes.hpp>
 
-#include <array>
-#include <cstring>
+#include <cstddef>
 #include <memory>
-#include <type_traits>
+#include <utility>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
@@ -137,7 +137,7 @@ class _LIBSYCL_EXPORT handler : private detail::KernelSubmissionBase<handler> {
   std::shared_ptr<detail::EventImpl> finalize();
 
   void submitKernelImpl(detail::DeviceKernelInfo &KernelInfo, void *ArgData,
-                        size_t ArgSize);
+                        std::size_t ArgSize);
 
   void setKernelRange(const detail::UnifiedRangeView &Range = {});
 
diff --git a/libsycl/include/sycl/__impl/index_space_classes.hpp b/libsycl/include/sycl/__impl/index_space_classes.hpp
index 8f99d03d004ee..25cc83b84356f 100644
--- a/libsycl/include/sycl/__impl/index_space_classes.hpp
+++ b/libsycl/include/sycl/__impl/index_space_classes.hpp
@@ -65,24 +65,24 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
   /// Returns the value for the specified dimension.
   /// Results in undefined behavior if dimension is not in the range [0,
   /// Dimensions).
-  /// \param Dimension the dimension to return the value for.
+  /// \param dimension the dimension to return the value for.
   /// \return the value matching the requested dimension.
-  std::size_t get(int Dimension) const noexcept { return MArray[Dimension]; }
+  std::size_t get(int dimension) const noexcept { return MArray[dimension]; }
 
   /// Returns the value for the specified dimension.
   /// Results in undefined behavior if dimension is not in the range [0,
   /// Dimensions).
-  /// \param Dimension the dimension to return the value for.
+  /// \param dimension the dimension to return the value for.
   /// \return the value matching the requested dimension.
-  std::size_t &operator[](int Dimension) noexcept { return MArray[Dimension]; }
+  std::size_t &operator[](int dimension) noexcept { return MArray[dimension]; }
 
   /// Returns the value for the specified dimension.
   /// Results in undefined behavior if dimension is not in the range [0,
   /// Dimensions).
-  /// \param Dimension the dimension to return the value for.
+  /// \param dimension the dimension to return the value for.
   /// \return the value matching the requested dimension.
-  std::size_t operator[](int Dimension) const noexcept {
-    return MArray[Dimension];
+  std::size_t operator[](int dimension) const noexcept {
+    return MArray[dimension];
   }
 
   IndexSpaceBase(const IndexSpaceBase<Derived, Dimensions> &rhs) = default;
@@ -95,8 +95,8 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
 
   friend bool operator==(const IndexSpaceBase<Derived, Dimensions> &lhs,
                          const IndexSpaceBase<Derived, Dimensions> &rhs) {
-    for (int i = 0; i < Dimensions; ++i) {
-      if (lhs.MArray[i] != rhs.MArray[i]) {
+    for (int I = 0; I < Dimensions; ++I) {
+      if (lhs.MArray[I] != rhs.MArray[I]) {
         return false;
       }
     }
@@ -111,31 +111,31 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
 #define _LIBSYCL_GEN_OPT(op)                                                   \
   friend Derived operator op(const Derived &lhs,                               \
                              const Derived &rhs) noexcept {                    \
-    Derived result;                                                            \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      result.MArray[i] = lhs.MArray[i] op rhs.MArray[i];                       \
+    Derived Result;                                                            \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      Result.MArray[I] = lhs.MArray[I] op rhs.MArray[I];                       \
     }                                                                          \
-    return result;                                                             \
+    return Result;                                                             \
   }                                                                            \
                                                                                \
   template <typename T>                                                        \
   friend IntegralType<T, Derived> operator op(const Derived &lhs,              \
                                               const T &rhs) noexcept {         \
-    Derived result;                                                            \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      result.MArray[i] = lhs.MArray[i] op rhs;                                 \
+    Derived Result;                                                            \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      Result.MArray[I] = lhs.MArray[I] op rhs;                                 \
     }                                                                          \
-    return result;                                                             \
+    return Result;                                                             \
   }                                                                            \
                                                                                \
   template <typename T>                                                        \
   friend IntegralType<T, Derived> operator op(const T &lhs,                    \
                                               const Derived &rhs) noexcept {   \
-    Derived result;                                                            \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      result.MArray[i] = lhs op rhs.MArray[i];                                 \
+    Derived Result;                                                            \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      Result.MArray[I] = lhs op rhs.MArray[I];                                 \
     }                                                                          \
-    return result;                                                             \
+    return Result;                                                             \
   }
 
   _LIBSYCL_GEN_OPT(+)
@@ -159,16 +159,16 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
 
 #define _LIBSYCL_GEN_OPT(op)                                                   \
   friend Derived &operator op(Derived &lhs, const Derived &rhs) noexcept {     \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      lhs.MArray[i] op rhs[i];                                                 \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      lhs.MArray[I] op rhs[I];                                                 \
     }                                                                          \
     return lhs;                                                                \
   }                                                                            \
   template <typename T>                                                        \
   friend IntegralType<T, Derived> &operator op(Derived &lhs,                   \
                                                const T &rhs) noexcept {        \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      lhs.MArray[i] op rhs;                                                    \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      lhs.MArray[I] op rhs;                                                    \
     }                                                                          \
     return lhs;                                                                \
   }
@@ -188,11 +188,11 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
 
 #define _LIBSYCL_GEN_OPT(op)                                                   \
   friend Derived operator op(const Derived &rhs) noexcept {                    \
-    Derived result;                                                            \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      result.MArray[i] = (op rhs.MArray[i]);                                   \
+    Derived Result;                                                            \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      Result.MArray[I] = (op rhs.MArray[I]);                                   \
     }                                                                          \
-    return result;                                                             \
+    return Result;                                                             \
   }
 
   _LIBSYCL_GEN_OPT(+)
@@ -202,17 +202,17 @@ template <typename Derived, int Dimensions> class IndexSpaceBase {
 
 #define _LIBSYCL_GEN_OPT(op)                                                   \
   friend Derived &operator op(Derived &rhs) noexcept {                         \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      op rhs.MArray[i];                                                        \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      op rhs.MArray[I];                                                        \
     }                                                                          \
     return rhs;                                                                \
   }                                                                            \
   friend Derived operator op(Derived &lhs, int) noexcept {                     \
-    Derived oldLhs(lhs);                                                       \
-    for (int i = 0; i < Dimensions; ++i) {                                     \
-      op lhs.MArray[i];                                                        \
+    Derived OldLhs(lhs);                                                       \
+    for (int I = 0; I < Dimensions; ++I) {                                     \
+      op lhs.MArray[I];                                                        \
     }                                                                          \
-    return oldLhs;                                                             \
+    return OldLhs;                                                             \
   }
 
   _LIBSYCL_GEN_OPT(++)
@@ -267,13 +267,13 @@ class range : public detail::IndexSpaceBase<range<Dimensions>, Dimensions> {
       std::size_t operator[](int dimension) const noexcept;
   */
 
-  /// \return the size of the range computed as dimension0*…​*dimensionN.
+  /// \return the size of the range computed as dimension0*...*dimensionN.
   std::size_t size() const noexcept {
-    std::size_t size = 1;
-    for (int i = 0; i < Dimensions; ++i) {
-      size *= Base::MArray[i];
+    std::size_t Size = 1;
+    for (int I = 0; I < Dimensions; ++I) {
+      Size *= Base::MArray[I];
     }
-    return size;
+    return Size;
   }
 };
 
@@ -457,7 +457,7 @@ template <int Dimensions /* = 1*/, bool WithOffset /* = true*/> class item {
     return !(lhs == rhs);
   }
 
-  /// \return the constituent id representing the work-item’s position in the
+  /// \return the constituent id representing the work-item's position in the
   /// iteration space.
   id<Dimensions> get_id() const noexcept { return MId; }
 
@@ -489,6 +489,7 @@ template <int Dimensions /* = 1*/, bool WithOffset /* = true*/> class item {
   /// work-item, if this item represents a global range.
   template <bool HasOffset = WithOffset,
             std::enable_if_t<HasOffset == true, bool> = true>
+  __SYCL2020_DEPRECATED("offsets are deprecated in SYCL2020")
   id<Dimensions> get_offset() const noexcept {
     return MOffset;
   }
@@ -514,36 +515,34 @@ template <int Dimensions /* = 1*/, bool WithOffset /* = true*/> class item {
   /// \return Return the id as a linear index value.
   std::size_t get_linear_id() const noexcept {
     if constexpr (WithOffset) {
-      if constexpr (1 == Dimensions) {
+      if constexpr (1 == Dimensions)
         return MId[0] - MOffset[0];
-      }
-      if constexpr (2 == Dimensions) {
+      else if constexpr (2 == Dimensions)
         return (MId[0] - MOffset[0]) * MRange[1] + MId[1] - MOffset[1];
-      }
-      return (MId[0] - MOffset[0]) * MRange[1] * MRange[2] +
-             (MId[1] - MOffset[1]) * MRange[2] + MId[2] - MOffset[2];
+      else
+        return (MId[0] - MOffset[0]) * MRange[1] * MRange[2] +
+               (MId[1] - MOffset[1]) * MRange[2] + MId[2] - MOffset[2];
     } else {
-      if constexpr (1 == Dimensions) {
+      if constexpr (1 == Dimensions)
         return MId[0];
-      }
-      if constexpr (2 == Dimensions) {
+      else if constexpr (2 == Dimensions)
         return MId[0] * MRange[1] + MId[1];
-      }
-      return MId[0] * MRange[1] * MRange[2] + MId[1] * MRange[2] + MId[2];
+      else
+        return MId[0] * MRange[1] * MRange[2] + MId[1] * MRange[2] + MId[2];
     }
   }
 
 protected:
   template <bool HasOffset = WithOffset,
             std::enable_if_t<HasOffset == true, bool> = true>
-  item(const sycl::range<Dimensions> &range, const sycl::id<Dimensions> &id,
-       const sycl::id<Dimensions> &offset)
-      : MRange(range), MId(id), MOffset(offset) {}
+  item(const sycl::range<Dimensions> &Range, const sycl::id<Dimensions> &Id,
+       const sycl::id<Dimensions> &Offset)
+      : MRange(Range), MId(Id), MOffset(Offset) {}
 
   template <bool HasOffset = WithOffset,
             std::enable_if_t<HasOffset == false, bool> = true>
-  item(const range<Dimensions> &range, const id<Dimensions> &id)
-      : MRange(range), MId(id), MOffset() {}
+  item(const range<Dimensions> &Range, const id<Dimensions> &Id)
+      : MRange(Range), MId(Id), MOffset() {}
 
 private:
   range<Dimensions> MRange;
diff --git a/libsycl/include/sycl/__impl/nd_item.hpp b/libsycl/include/sycl/__impl/nd_item.hpp
index f9ce98a67deb0..664712436fbd5 100644
--- a/libsycl/include/sycl/__impl/nd_item.hpp
+++ b/libsycl/include/sycl/__impl/nd_item.hpp
@@ -52,53 +52,45 @@ template <int Dimensions = 1> class nd_item {
     return !(lhs == rhs);
   }
 
-  /// \return the constituent global id representing the work-item’s position in
+  /// \return the constituent global id representing the work-item's position in
   /// the global iteration space.
   id<Dimensions> get_global_id() const noexcept {
     return __spirv::initBuiltInGlobalInvocationId<Dimensions, id<Dimensions>>();
   }
 
   /// \return the constituent element of the global id representing the
-  /// work-item’s position in the nd-range in the given Dimension.
+  /// work-item's position in the nd-range in the given Dimension.
   std::size_t get_global_id(int dimension) const noexcept {
     return get_global_id()[dimension];
   }
 
   /// \return the constituent global id as a linear index value, representing
-  /// the work-item’s position in the global iteration space.
+  /// the work-item's position in the global iteration space.
   std::size_t get_global_linear_id() const noexcept {
-    id<Dimensions> adjustedIndex = get_global_id();
-    const id<Dimensions> offset =
+    id<Dimensions> AdjustedIndex = get_global_id();
+    const id<Dimensions> Offset =
         __spirv::initBuiltInGlobalOffset<Dimensions, id<Dimensions>>();
-    if constexpr (Dimensions == 1) {
-      adjustedIndex[0] -= offset[0];
-    } else if constexpr (Dimensions == 2) {
-      adjustedIndex[0] -= offset[0];
-      adjustedIndex[1] -= offset[1];
-    } else {
-      adjustedIndex[0] -= offset[0];
-      adjustedIndex[1] -= offset[1];
-      adjustedIndex[2] -= offset[2];
-    }
-    return detail::linearize_id(adjustedIndex, get_global_range());
-  }
-
-  /// \return the constituent local id representing the work-item’s position
+    for (int I = 0; I < Dimensions; ++I)
+      AdjustedIndex[I] -= Offset[I];
+    return detail::linearizeId(AdjustedIndex, get_global_range());
+  }
+
+  /// \return the constituent local id representing the work-item's position
   /// within the current work-group.
   id<Dimensions> get_local_id() const noexcept {
     return __spirv::initBuiltInLocalInvocationId<Dimensions, id<Dimensions>>();
   }
 
   /// \return the constituent element of the local id representing the
-  /// work-item’s position within the current work-group in the given Dimension.
+  /// work-item's position within the current work-group in the given Dimension.
   std::size_t get_local_id(int dimension) const noexcept {
     return get_local_id()[dimension];
   }
 
   /// \return the constituent local id as a linear index value, representing the
-  /// work-item’s position within the current work-group.
+  /// work-item's position within the current work-group.
   std::size_t get_local_linear_id() const noexcept {
-    return detail::linearize_id(get_local_id(), get_local_range());
+    return detail::linearizeId(get_local_id(), get_local_range());
   }
 
   /// \return the constituent work-group, group representing the work-group's
@@ -110,14 +102,14 @@ template <int Dimensions = 1> class nd_item {
   sub_group get_sub_group() const noexcept { return sub_group(); }
 
   /// \return the constituent element of the group id representing the
-  /// work-group’s position within the overall nd_range in the given Dimension.
+  /// work-group's position within the overall nd_range in the given Dimension.
   std::size_t get_group(int dimension) const noexcept {
-    return get_group_id()[dimension];
+    return getGroupId()[dimension];
   }
 
   /// \return the group id as a linear index value.
   std::size_t get_group_linear_id() const noexcept {
-    return detail::linearize_id(get_group_id(), get_group_range());
+    return detail::linearizeId(getGroupId(), get_group_range());
   }
 
   /// \return the number of work-groups in the iteration space.
@@ -173,7 +165,7 @@ template <int Dimensions = 1> class nd_item {
 
   nd_item() = default;
 
-  id<Dimensions> get_group_id() const {
+  id<Dimensions> getGroupId() const {
     return __spirv::initBuiltInWorkgroupId<Dimensions, id<Dimensions>>();
   }
 };
diff --git a/libsycl/include/sycl/__impl/platform.hpp b/libsycl/include/sycl/__impl/platform.hpp
index 8512e53a11385..5d55d1045f442 100644
--- a/libsycl/include/sycl/__impl/platform.hpp
+++ b/libsycl/include/sycl/__impl/platform.hpp
@@ -22,7 +22,7 @@
 #include <sycl/__impl/info/device_type.hpp>
 #include <sycl/__impl/info/platform.hpp>
 
-#include <memory>
+#include <functional>
 #include <vector>
 
 #define SYCL_KHR_DEFAULT_CONTEXT 1
@@ -68,10 +68,10 @@ class _LIBSYCL_EXPORT platform {
   /// If there are no devices that match given device
   /// type, resulting vector is empty.
   ///
-  /// \param DeviceType is a SYCL device type.
+  /// \param type is a SYCL device type.
   /// \return a vector of SYCL devices matching given device type.
   std::vector<device>
-  get_devices(info::device_type DeviceType = info::device_type::all) const;
+  get_devices(info::device_type type = info::device_type::all) const;
 
   /// Queries this SYCL platform for info.
   ///
@@ -89,11 +89,11 @@ class _LIBSYCL_EXPORT platform {
   /// Indicates if all of the SYCL devices on this platform have the
   /// given aspect.
   ///
-  /// \param Aspect is one of the values defined in SYCL 2020 Section 4.6.4.5.
+  /// \param asp is one of the values defined in SYCL 2020 Section 4.6.4.5.
   ///
   /// \return true if all of the SYCL devices on this platform have the
   /// given aspect.
-  bool has(aspect Aspect) const;
+  bool has(aspect asp) const;
 
   /// Returns all SYCL platforms from all backends that are available in the
   /// system.
diff --git a/libsycl/include/sycl/__impl/queue.hpp b/libsycl/include/sycl/__impl/queue.hpp
index 936ea5991fd05..cbcba218b104e 100644
--- a/libsycl/include/sycl/__impl/queue.hpp
+++ b/libsycl/include/sycl/__impl/queue.hpp
@@ -19,6 +19,7 @@
 #include <sycl/__impl/context.hpp>
 #include <sycl/__impl/device.hpp>
 #include <sycl/__impl/event.hpp>
+#include <sycl/__impl/exception.hpp>
 #include <sycl/__impl/handler.hpp>
 #include <sycl/__impl/platform.hpp>
 #include <sycl/__impl/property_list.hpp>
@@ -29,7 +30,13 @@
 #include <sycl/__impl/detail/kernel_submission.hpp>
 #include <sycl/__impl/detail/obj_utils.hpp>
 #include <sycl/__impl/detail/unified_range_view.hpp>
-#include <sycl/__impl/exception.hpp>
+
+#include <cstddef>
+#include <functional>
+#include <memory>
+#include <type_traits>
+#include <utility>
+#include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -60,7 +67,6 @@ struct CheckFunctionCallOperator<F, RetT(Args...)> {
 public:
   static constexpr bool value = type::value;
 };
-} // namespace detail
 
 class TypelessCGF {
 public:
@@ -69,8 +75,8 @@ class TypelessCGF {
       // NOTE: Even if `F` is a pointer to a function, `&F` is a pointer to a
       // pointer to a function and as such can be cast to `void *` (pointer to
       // a function cannot be cast).
-      : Object(static_cast<const void *>(&F)),
-        InvokerF(&Invoker<std::remove_reference_t<T>>::call) {}
+      : MObject(static_cast<const void *>(&F)),
+        MInvokerF(&Invoker<std::remove_reference_t<T>>::call) {}
   ~TypelessCGF() = default;
 
   TypelessCGF(const TypelessCGF &) = delete;
@@ -78,7 +84,7 @@ class TypelessCGF {
   TypelessCGF &operator=(const TypelessCGF &) = delete;
   TypelessCGF &operator=(TypelessCGF &&) = delete;
 
-  void operator()(handler &CGH) const { InvokerF(Object, CGH); }
+  void operator()(handler &CGH) const { MInvokerF(MObject, CGH); }
 
 private:
   // SYCL 2020 command group function object is a type that is callable with
@@ -90,11 +96,13 @@ class TypelessCGF {
       (*const_cast<T *>(static_cast<const T *>(Object)))(CGH);
     }
   };
-  const void *Object;
+  const void *MObject;
   using InvokerTy = void (*)(const void *, handler &);
-  const InvokerTy InvokerF;
+  const InvokerTy MInvokerF;
 };
 
+} // namespace detail
+
 // SYCL 2020 4.6.5. Queue class.
 class _LIBSYCL_EXPORT queue : private detail::KernelSubmissionBase<queue> {
 public:
@@ -681,7 +689,7 @@ class _LIBSYCL_EXPORT queue : private detail::KernelSubmissionBase<queue> {
   /// \param ArgData a pointer to the kernel argument.
   /// \param ArgSize the size of the kernel argument.
   void submitKernelImpl(detail::DeviceKernelInfo &KernelInfo, void *ArgData,
-                        size_t ArgSize);
+                        std::size_t ArgSize);
 
   /// \return an event representing last kernel invocation.
   event getLastEvent();
@@ -699,7 +707,7 @@ class _LIBSYCL_EXPORT queue : private detail::KernelSubmissionBase<queue> {
   event fillImpl(void *Ptr, const void *Pattern, std::size_t PatternSize,
                  std::size_t Count, const std::vector<event> &DepEvents);
 
-  event submitWithHandler(const TypelessCGF &CGF);
+  event submitWithHandler(const detail::TypelessCGF &CGF);
 
   queue(const std::shared_ptr<detail::QueueImpl> &Impl) : impl(Impl) {}
   std::shared_ptr<detail::QueueImpl> impl;
diff --git a/libsycl/include/sycl/__impl/sub_group.hpp b/libsycl/include/sycl/__impl/sub_group.hpp
index fbcba75170e03..5124b2ba63b54 100644
--- a/libsycl/include/sycl/__impl/sub_group.hpp
+++ b/libsycl/include/sycl/__impl/sub_group.hpp
@@ -53,7 +53,7 @@ class sub_group {
   /// work-group.
   id_type get_group_id() const noexcept { return __spirv_BuiltInSubgroupId(); }
 
-  /// \return a SYCL id representing the calling work-item’s position within the
+  /// \return a SYCL id representing the calling work-item's position within the
   /// sub-group.
   id_type get_local_id() const noexcept {
     return __spirv_BuiltInSubgroupLocalInvocationId();
@@ -104,7 +104,7 @@ class sub_group {
 protected:
   sub_group() = default;
 
-  template <int dimensions> friend class sycl::nd_item;
+  template <int> friend class sycl::nd_item;
 };
 
 _LIBSYCL_END_NAMESPACE_SYCL
diff --git a/libsycl/include/sycl/__impl/usm_functions.hpp b/libsycl/include/sycl/__impl/usm_functions.hpp
index 376200faa7901..0faae83c1aef1 100644
--- a/libsycl/include/sycl/__impl/usm_functions.hpp
+++ b/libsycl/include/sycl/__impl/usm_functions.hpp
@@ -21,6 +21,7 @@
 #include <sycl/__impl/detail/config.hpp>
 
 #include <algorithm>
+#include <cstddef>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -578,9 +579,10 @@ T *malloc(std::size_t count, const queue &syclQueue, usm::alloc kind,
 /// Deallocate USM of any kind.
 ///
 /// \param ptr a pointer that satisfies the following preconditions: points to
-/// memory allocated against ctxt using one of the USM allocation routines, or
-/// is a null pointer; ptr has not previously been deallocated; there are no
-/// in-progress or enqueued commands using the memory pointed to by ptr.
+/// memory allocated against ctxt using one of the USM allocation
+/// routines, or is a null pointer; ptr has not previously been deallocated;
+/// there are no in-progress or enqueued commands using the memory pointed to
+/// by ptr.
 /// \param ctxt the context that is associated with ptr.
 _LIBSYCL_EXPORT void free(void *ptr, const context &ctxt);
 
@@ -589,9 +591,10 @@ _LIBSYCL_EXPORT void free(void *ptr, const context &ctxt);
 /// Equivalent to free(ptr, q.get_context()).
 ///
 /// \param ptr a pointer that satisfies the following preconditions: points to
-/// memory allocated against ctxt using one of the USM allocation routines, or
-/// is a null pointer; ptr has not previously been deallocated; there are no
-/// in-progress or enqueued commands using the memory pointed to by ptr.
+/// memory allocated against a context using one of the USM allocation
+/// routines, or is a null pointer; ptr has not previously been deallocated;
+/// there are no in-progress or enqueued commands using the memory pointed to
+/// by ptr.
 /// \param q a queue to determine the context associated with ptr.
 _LIBSYCL_EXPORT void free(void *ptr, const queue &q);
 /// @}
diff --git a/libsycl/include/sycl/__spirv/spirv_types.hpp b/libsycl/include/sycl/__spirv/spirv_types.hpp
index 47f29367df3b4..4633846989ced 100644
--- a/libsycl/include/sycl/__spirv/spirv_types.hpp
+++ b/libsycl/include/sycl/__spirv/spirv_types.hpp
@@ -18,7 +18,7 @@
 
 namespace __spirv {
 
-enum Scope : int32_t {
+enum Scope : std::int32_t {
   CrossDevice = 0,
   Device = 1,
   Workgroup = 2,
@@ -26,7 +26,7 @@ enum Scope : int32_t {
   Invocation = 4,
 };
 
-enum MemorySemanticsMask : int32_t {
+enum MemorySemanticsMask : std::int32_t {
   None = 0x0,
   Acquire = 0x2,
   Release = 0x4,
diff --git a/libsycl/include/sycl/__spirv/spirv_vars.hpp b/libsycl/include/sycl/__spirv/spirv_vars.hpp
index c6dc0c099dcdf..4209166d28ac1 100644
--- a/libsycl/include/sycl/__spirv/spirv_vars.hpp
+++ b/libsycl/include/sycl/__spirv/spirv_vars.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL___SPIRV_SPIRV_VARS
-#define _LIBSYCL___SPIRV_SPIRV_VARS
+#ifndef _LIBSYCL___SPIRV_SPIRV_VARS_HPP
+#define _LIBSYCL___SPIRV_SPIRV_VARS_HPP
 
 #include <__clang_spirv_builtins.h>
 
@@ -24,10 +24,16 @@ namespace __spirv {
 // Helper function templates to initialize and get vector component from SPIR-V
 // built-in variables
 #define __SPIRV_DEFINE_INIT_AND_GET_HELPERS(POSTFIX)                           \
-  template <int ID> size_t get##POSTFIX();                                     \
-  template <> inline size_t get##POSTFIX<0>() { return __spirv_##POSTFIX(0); } \
-  template <> inline size_t get##POSTFIX<1>() { return __spirv_##POSTFIX(1); } \
-  template <> inline size_t get##POSTFIX<2>() { return __spirv_##POSTFIX(2); } \
+  template <int ID> std::size_t get##POSTFIX();                                \
+  template <> inline std::size_t get##POSTFIX<0>() {                           \
+    return __spirv_##POSTFIX(0);                                               \
+  }                                                                            \
+  template <> inline std::size_t get##POSTFIX<1>() {                           \
+    return __spirv_##POSTFIX(1);                                               \
+  }                                                                            \
+  template <> inline std::size_t get##POSTFIX<2>() {                           \
+    return __spirv_##POSTFIX(2);                                               \
+  }                                                                            \
                                                                                \
   template <int Dim, class DstT> struct InitSizesST##POSTFIX;                  \
                                                                                \
@@ -61,4 +67,4 @@ __SPIRV_DEFINE_INIT_AND_GET_HELPERS(BuiltInNumWorkgroups)
 
 } // namespace __spirv
 
-#endif // _LIBSYCL___SPIRV_SPIRV_VARS
+#endif // _LIBSYCL___SPIRV_SPIRV_VARS_HPP
diff --git a/libsycl/include/sycl/sycl.hpp b/libsycl/include/sycl/sycl.hpp
index 4c5e3e62a11c8..44678228e8fa7 100644
--- a/libsycl/include/sycl/sycl.hpp
+++ b/libsycl/include/sycl/sycl.hpp
@@ -14,6 +14,9 @@
 #ifndef _LIBSYCL_SYCL_HPP
 #define _LIBSYCL_SYCL_HPP
 
+#include <sycl/__impl/aspect.hpp>
+#include <sycl/__impl/async_handler.hpp>
+#include <sycl/__impl/backend.hpp>
 #include <sycl/__impl/context.hpp>
 #include <sycl/__impl/device.hpp>
 #include <sycl/__impl/device_selector.hpp>
@@ -21,13 +24,16 @@
 #include <sycl/__impl/exception.hpp>
 #include <sycl/__impl/group.hpp>
 #include <sycl/__impl/group_barrier.hpp>
+#include <sycl/__impl/handler.hpp>
 #include <sycl/__impl/index_space_classes.hpp>
 #include <sycl/__impl/memory_enums.hpp>
 #include <sycl/__impl/nd_item.hpp>
 #include <sycl/__impl/nd_range.hpp>
 #include <sycl/__impl/platform.hpp>
+#include <sycl/__impl/property_list.hpp>
 #include <sycl/__impl/queue.hpp>
 #include <sycl/__impl/sub_group.hpp>
+#include <sycl/__impl/usm_alloc_type.hpp>
 #include <sycl/__impl/usm_functions.hpp>
 
 #endif // _LIBSYCL_SYCL_HPP
diff --git a/libsycl/src/context.cpp b/libsycl/src/context.cpp
index 1f1be69e89139..6eb2371d74cf1 100644
--- a/libsycl/src/context.cpp
+++ b/libsycl/src/context.cpp
@@ -13,17 +13,18 @@
 #include <detail/context_impl.hpp>
 #include <detail/platform_impl.hpp>
 
-#include <algorithm>
 #include <cassert>
+#include <utility>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 context::context(const std::vector<device> &deviceList,
                  async_handler asyncHandler, const property_list &propList) {
-  auto deviceImpls = detail::getSyclObjImpls(deviceList);
+  std::vector<detail::DeviceImpl *> DeviceImpls =
+      detail::getSyclObjImpls(deviceList);
 
-  impl = detail::ContextImpl::create(std::move(deviceImpls), asyncHandler,
+  impl = detail::ContextImpl::create(std::move(DeviceImpls), asyncHandler,
                                      propList);
 }
 
diff --git a/libsycl/src/detail/context_impl.cpp b/libsycl/src/detail/context_impl.cpp
index 0362c3d9241f0..c07aa19e15dfa 100644
--- a/libsycl/src/detail/context_impl.cpp
+++ b/libsycl/src/detail/context_impl.cpp
@@ -9,13 +9,17 @@
 #include <detail/context_impl.hpp>
 #include <detail/platform_impl.hpp>
 
+#include <cassert>
+#include <tuple>
+#include <utility>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
 
 ContextImpl::ContextImpl(std::vector<DeviceImpl *> &&DeviceList,
                          const async_handler &AsyncHandler,
-                         const property_list &PropList, Private)
+                         const property_list &PropList, PrivateTag)
     : MAsyncHandler(AsyncHandler), MDevices(std::move(DeviceList)) {
   // TODO: Remove this when property_list is implemented
   std::ignore = PropList;
@@ -53,9 +57,9 @@ PlatformImpl &ContextImpl::getPlatformImpl() const {
 }
 
 void ContextImpl::iterateDevices(
-    const std::function<void(DeviceImpl *)> &callback) const {
+    const std::function<void(DeviceImpl *)> &Callback) const {
   for (DeviceImpl *Device : MDevices)
-    callback(Device);
+    Callback(Device);
 }
 
 backend ContextImpl::getBackend() const { return MDevices[0]->getBackend(); }
diff --git a/libsycl/src/detail/context_impl.hpp b/libsycl/src/detail/context_impl.hpp
index 2b01e911aa603..7a63582929376 100644
--- a/libsycl/src/detail/context_impl.hpp
+++ b/libsycl/src/detail/context_impl.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_CONTEXT_IMPL
-#define _LIBSYCL_CONTEXT_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_CONTEXT_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_CONTEXT_IMPL_HPP
 
 #include <sycl/__impl/async_handler.hpp>
 #include <sycl/__impl/context.hpp>
@@ -24,9 +24,12 @@
 #include <OffloadAPI.h>
 
 #include <functional>
+#include <memory>
 #include <mutex>
 #include <string_view>
 #include <unordered_map>
+#include <utility>
+#include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -40,8 +43,8 @@ class DeviceImpl;
 /// Context represents the runtime data structures and state required by a SYCL
 /// backend API to interact with a group of devices associated with a platform.
 class ContextImpl : public std::enable_shared_from_this<ContextImpl> {
-  struct Private {
-    explicit Private() = default;
+  struct PrivateTag {
+    explicit PrivateTag() = default;
   };
 
 public:
@@ -52,7 +55,7 @@ class ContextImpl : public std::enable_shared_from_this<ContextImpl> {
   /// \param PropList is a list of context properties.
   ContextImpl(std::vector<DeviceImpl *> &&DeviceList,
               const async_handler &AsyncHandler, const property_list &PropList,
-              Private);
+              PrivateTag);
 
   /// Releases the underlying offload context handle.
   ~ContextImpl();
@@ -60,13 +63,14 @@ class ContextImpl : public std::enable_shared_from_this<ContextImpl> {
   /// Gets asynchronous exception handler.
   ///
   /// \return an instance of SYCL async_handler.
-  const async_handler &get_async_handler() const { return MAsyncHandler; }
+  const async_handler &getAsyncHandler() const { return MAsyncHandler; }
 
-  /// Constructs a ContextImpl with a provided arguments. Variadic helper.
-  /// Restrics ways of ContextImpl creation.
+  /// Constructs a ContextImpl with the provided arguments. Variadic helper.
+  /// Restricts ContextImpl creation to std::shared_ptr allocations.
   template <typename... Ts>
-  static std::shared_ptr<ContextImpl> create(Ts &&...args) {
-    return std::make_shared<ContextImpl>(std::forward<Ts>(args)..., Private{});
+  static std::shared_ptr<ContextImpl> create(Ts &&...Args) {
+    return std::make_shared<ContextImpl>(std::forward<Ts>(Args)...,
+                                         PrivateTag{});
   }
 
   /// Returns the raw underlying offload context handle.
@@ -80,9 +84,8 @@ class ContextImpl : public std::enable_shared_from_this<ContextImpl> {
   /// \return the platform this context is associated with.
   PlatformImpl &getPlatformImpl() const;
 
-  /// Calls "callback" with every device associated
-  /// with this context.
-  void iterateDevices(const std::function<void(DeviceImpl *)> &callback) const;
+  /// Calls Callback with every device associated with this context.
+  void iterateDevices(const std::function<void(DeviceImpl *)> &Callback) const;
 
   /// \return backend of the platform this context is associated with.
   backend getBackend() const;
@@ -130,4 +133,4 @@ class ContextImpl : public std::enable_shared_from_this<ContextImpl> {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_CONTEXT_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_CONTEXT_IMPL_HPP
diff --git a/libsycl/src/detail/device_binary_structures.hpp b/libsycl/src/detail/device_binary_structures.hpp
index f453272a3647c..29e71b45b3354 100644
--- a/libsycl/src/detail/device_binary_structures.hpp
+++ b/libsycl/src/detail/device_binary_structures.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_DEVICE_BINARY_STRUCTURES
-#define _LIBSYCL_DEVICE_BINARY_STRUCTURES
+#ifndef _LIBSYCL_SRC_DETAIL_DEVICE_BINARY_STRUCTURES_HPP
+#define _LIBSYCL_SRC_DETAIL_DEVICE_BINARY_STRUCTURES_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -33,4 +33,4 @@ static constexpr char DeviceBinaryTripleSPIRV64[] = "spirv64-unknown-unknown";
 } // namespace detail
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_DEVICE_BINARY_STRUCTURES
+#endif // _LIBSYCL_SRC_DETAIL_DEVICE_BINARY_STRUCTURES_HPP
diff --git a/libsycl/src/detail/device_image_wrapper.cpp b/libsycl/src/detail/device_image_wrapper.cpp
index 9133a28035524..643ad1699182d 100644
--- a/libsycl/src/detail/device_image_wrapper.cpp
+++ b/libsycl/src/detail/device_image_wrapper.cpp
@@ -11,6 +11,9 @@
 #include <detail/context_impl.hpp>
 #include <detail/offload/offload_utils.hpp>
 
+#include <cassert>
+#include <tuple>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
 
@@ -26,7 +29,7 @@ ProgramWrapper::ProgramWrapper(ContextImpl &Context, ol_device_handle_t Device,
 }
 
 ProgramWrapper::~ProgramWrapper() {
-  assert(MProgram);
+  assert(MProgram && "Program handle can't be nullptr");
   std::ignore = olDestroyProgram(MProgram);
   // TODO: define a way to report errors from dtors.
 }
diff --git a/libsycl/src/detail/device_image_wrapper.hpp b/libsycl/src/detail/device_image_wrapper.hpp
index 171e1a25393d2..d66e2b1e623e9 100644
--- a/libsycl/src/detail/device_image_wrapper.hpp
+++ b/libsycl/src/detail/device_image_wrapper.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_DEVICE_IMAGE_WRAPPER
-#define _LIBSYCL_DEVICE_IMAGE_WRAPPER
+#ifndef _LIBSYCL_SRC_DETAIL_DEVICE_IMAGE_WRAPPER_HPP
+#define _LIBSYCL_SRC_DETAIL_DEVICE_IMAGE_WRAPPER_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -28,6 +28,7 @@ _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_END
 #include <memory>
 #include <string_view>
 #include <unordered_map>
+#include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
@@ -90,7 +91,7 @@ class ProgramWrapper {
 /// This class manages data parsing of device images.
 class DeviceImageManager {
 public:
-  DeviceImageManager(std::unique_ptr<llvm::object::OffloadBinary> Bin)
+  explicit DeviceImageManager(std::unique_ptr<llvm::object::OffloadBinary> Bin)
       : MBin(std::move(Bin)) {}
   // Explicitly delete copy constructor/operator= to avoid unintentional copies.
   DeviceImageManager(const DeviceImageManager &) = delete;
@@ -104,7 +105,7 @@ class DeviceImageManager {
   /// \return a reference to the corresponding parsed OffloadBinary object.
   const llvm::object::OffloadBinary &getOffloadBinary() const { return *MBin; }
 
-protected:
+private:
   std::unique_ptr<llvm::object::OffloadBinary> MBin;
 };
 
@@ -112,4 +113,4 @@ class DeviceImageManager {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_DEVICE_IMAGE_WRAPPER
+#endif // _LIBSYCL_SRC_DETAIL_DEVICE_IMAGE_WRAPPER_HPP
diff --git a/libsycl/src/detail/device_impl.hpp b/libsycl/src/detail/device_impl.hpp
index f5012fe84c069..af76ad8f7a710 100644
--- a/libsycl/src/detail/device_impl.hpp
+++ b/libsycl/src/detail/device_impl.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_DEVICE_IMPL
-#define _LIBSYCL_DEVICE_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_DEVICE_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_DEVICE_IMPL_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/device.hpp>
@@ -23,6 +23,10 @@
 
 #include <OffloadAPI.h>
 
+#include <cassert>
+#include <string>
+#include <type_traits>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
 
@@ -90,35 +94,39 @@ class DeviceImpl {
   /// The return type depends on information being queried.
   template <typename Param> typename Param::return_type getInfo() const {
     using namespace info::device;
-    using Map = info_ol_mapping<ol_device_info_t>;
+    using Map = InfoOLMapping<ol_device_info_t>;
 
-    constexpr ol_device_info_t olInfo = map_info_desc<Param, ol_device_info_t>(
+    constexpr ol_device_info_t OLInfo = mapInfoDesc<Param, ol_device_info_t>(
         Map::M<device_type>{OL_DEVICE_INFO_TYPE},
         Map::M<name>{OL_DEVICE_INFO_NAME},
         Map::M<vendor>{OL_DEVICE_INFO_VENDOR},
         Map::M<driver_version>{OL_DEVICE_INFO_DRIVER_VERSION});
 
     size_t ExpectedSize = 0;
-    callAndThrow(olGetDeviceInfoSize, MOffloadDevice, olInfo, &ExpectedSize);
+    callAndThrow(olGetDeviceInfoSize, MOffloadDevice, OLInfo, &ExpectedSize);
 
     if constexpr (std::is_same_v<typename Param::return_type, std::string>) {
+      assert(ExpectedSize > 0 && "String info descriptor size must account for "
+                                 "the null terminator");
       std::string Result;
       // liboffload counts null terminator in the size while std::string
       // doesn't.
       Result.resize(ExpectedSize - 1);
-      callAndThrow(olGetDeviceInfo, MOffloadDevice, olInfo, ExpectedSize,
+      callAndThrow(olGetDeviceInfo, MOffloadDevice, OLInfo, ExpectedSize,
                    Result.data());
       return Result;
-    } else if constexpr (olInfo == OL_DEVICE_INFO_TYPE) {
+    } else if constexpr (OLInfo == OL_DEVICE_INFO_TYPE) {
       assert((sizeof(typename Param::return_type) == ExpectedSize) &&
              "Size of info descriptor reported by backend doesn't match with "
              "expected.");
-      ol_device_type_t olType{};
-      callAndThrow(olGetDeviceInfo, MOffloadDevice, olInfo, sizeof(olType),
-                   &olType);
-      return convertDeviceTypeToSYCL(olType);
-    } else
-      static_assert(false && "Info descriptor is not properly supported");
+      ol_device_type_t OLType{};
+      callAndThrow(olGetDeviceInfo, MOffloadDevice, OLInfo, sizeof(OLType),
+                   &OLType);
+      return convertDeviceTypeToSYCL(OLType);
+    } else {
+      static_assert(AlwaysFalse<Param>,
+                    "Info descriptor is not properly supported");
+    }
   }
 
   /// \return the corresponding liboffload device handle.
@@ -133,4 +141,4 @@ class DeviceImpl {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_DEVICE_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_DEVICE_IMPL_HPP
diff --git a/libsycl/src/detail/device_kernel_info.hpp b/libsycl/src/detail/device_kernel_info.hpp
index 7899487b05369..448e885984492 100644
--- a/libsycl/src/detail/device_kernel_info.hpp
+++ b/libsycl/src/detail/device_kernel_info.hpp
@@ -13,8 +13,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_DEVICE_KERNEL_INFO
-#define _LIBSYCL_DEVICE_KERNEL_INFO
+#ifndef _LIBSYCL_SRC_DETAIL_DEVICE_KERNEL_INFO_HPP
+#define _LIBSYCL_SRC_DETAIL_DEVICE_KERNEL_INFO_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -40,7 +40,7 @@ class DeviceKernelInfo {
       : MName(KernelName), MDeviceImage(DeviceImage) {}
 
   /// \return the name of this kernel.
-  std::string_view getName() { return MName; }
+  std::string_view getName() const { return MName; }
 
   /// \return the device image containing the device code of this kernel.
   DeviceImageManager &getDeviceImage() const { return MDeviceImage; }
@@ -54,4 +54,4 @@ class DeviceKernelInfo {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_DEVICE_KERNEL_INFO
+#endif // _LIBSYCL_SRC_DETAIL_DEVICE_KERNEL_INFO_HPP
diff --git a/libsycl/src/detail/event_impl.cpp b/libsycl/src/detail/event_impl.cpp
index 11d920a7536ab..6484025467b23 100644
--- a/libsycl/src/detail/event_impl.cpp
+++ b/libsycl/src/detail/event_impl.cpp
@@ -12,6 +12,8 @@
 #include <detail/platform_impl.hpp>
 #include <detail/queue_impl.hpp>
 
+#include <tuple>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
diff --git a/libsycl/src/detail/event_impl.hpp b/libsycl/src/detail/event_impl.hpp
index 23c910a39cfe9..e1890595846f2 100644
--- a/libsycl/src/detail/event_impl.hpp
+++ b/libsycl/src/detail/event_impl.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_EVENT_IMPL
-#define _LIBSYCL_EVENT_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_EVENT_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_EVENT_IMPL_HPP
 
 #include <sycl/__impl/backend.hpp>
 #include <sycl/__impl/detail/config.hpp>
@@ -21,6 +21,7 @@
 #include <OffloadAPI.h>
 
 #include <memory>
+#include <utility>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
@@ -102,4 +103,4 @@ class EventImpl {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_EVENT_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_EVENT_IMPL_HPP
diff --git a/libsycl/src/detail/global_objects.cpp b/libsycl/src/detail/global_objects.cpp
index 0ef13295d513d..55f46b2ccf01a 100644
--- a/libsycl/src/detail/global_objects.cpp
+++ b/libsycl/src/detail/global_objects.cpp
@@ -12,10 +12,6 @@
 #include <detail/program_manager.hpp>
 #include <detail/queue_impl.hpp>
 
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
 #include <cassert>
 #include <tuple>
 #include <utility>
@@ -23,6 +19,8 @@
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
+
+namespace {
 // libsycl follows SYCL 2020 specification that doesn't declare any
 // init/shutdown methods that can help to avoid usage of static variables.
 // liboffload uses static variables too. In the first call of get_platforms
@@ -43,12 +41,14 @@ struct StaticVarShutdownHandler {
   }
 };
 
+} // namespace
+
 void registerStaticVarShutdownHandler() {
   // Touch the program manager singleton first: static objects are destroyed in
   // reverse order of construction, so this guarantees it is still alive when
   // ~StaticVarShutdownHandler() calls releaseResources() on it.
   std::ignore = ProgramAndKernelManager::getInstance();
-  static StaticVarShutdownHandler handler{};
+  static StaticVarShutdownHandler ShutdownHandler{};
 }
 
 std::array<detail::OffloadTopology, OL_PLATFORM_BACKEND_LAST> &
@@ -104,8 +104,8 @@ void flushAsyncExceptions() {
     }
 
     if (std::shared_ptr<ContextImpl> Context = WeakContext.lock();
-        Context && Context->get_async_handler()) {
-      Context->get_async_handler()(std::move(Exceptions));
+        Context && Context->getAsyncHandler()) {
+      Context->getAsyncHandler()(std::move(Exceptions));
       continue;
     }
 
diff --git a/libsycl/src/detail/global_objects.hpp b/libsycl/src/detail/global_objects.hpp
index 4200d8ab1b841..481ed94f5b86e 100644
--- a/libsycl/src/detail/global_objects.hpp
+++ b/libsycl/src/detail/global_objects.hpp
@@ -11,8 +11,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_GLOBAL_OBJECTS
-#define _LIBSYCL_GLOBAL_OBJECTS
+#ifndef _LIBSYCL_SRC_DETAIL_GLOBAL_OBJECTS_HPP
+#define _LIBSYCL_SRC_DETAIL_GLOBAL_OBJECTS_HPP
 
 #include <detail/offload/offload_topology.hpp>
 #include <detail/spinlock.hpp>
@@ -20,6 +20,7 @@
 #include <sycl/__impl/exception.hpp>
 
 #include <array>
+#include <exception>
 #include <map>
 #include <memory>
 #include <mutex>
@@ -39,7 +40,7 @@ template <typename T> using InstanceWithLock = std::pair<T, SpinLock>;
 ///
 /// This vector is populated only once at the first call of get_platforms().
 ///
-/// \returns std::array of all offload topologies.
+/// \return std::array of all offload topologies.
 std::array<detail::OffloadTopology, OL_PLATFORM_BACKEND_LAST> &
 getOffloadTopologies();
 
@@ -48,7 +49,7 @@ getOffloadTopologies();
 ///
 /// This vector is populated only once at the first call of get_platforms().
 ///
-/// \returns std::vector of implementation objects for all platforms.
+/// \return std::vector of implementation objects for all platforms.
 std::vector<std::unique_ptr<PlatformImpl>> &getPlatformCache();
 
 // This initializes a function-local variable whose destructor is invoked as
@@ -89,4 +90,4 @@ void flushAsyncExceptions();
 } // namespace detail
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_GLOBAL_OBJECTS
+#endif // _LIBSYCL_SRC_DETAIL_GLOBAL_OBJECTS_HPP
diff --git a/libsycl/src/detail/handler_impl.hpp b/libsycl/src/detail/handler_impl.hpp
index a6a8dbaa737b0..08e836f1b5726 100644
--- a/libsycl/src/detail/handler_impl.hpp
+++ b/libsycl/src/detail/handler_impl.hpp
@@ -13,8 +13,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_HANDLER_IMPL
-#define _LIBSYCL_HANDLER_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_HANDLER_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_HANDLER_IMPL_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -33,7 +33,7 @@ class QueueImpl;
 
 /// Stores the deferred command group state for a sycl::handler submission.
 struct HandlerImpl {
-  HandlerImpl(QueueImpl &Queue) : MQueue(Queue) {}
+  explicit HandlerImpl(QueueImpl &Queue) : MQueue(Queue) {}
 
   HandlerImpl(const HandlerImpl &) = delete;
   HandlerImpl(HandlerImpl &&) = delete;
@@ -59,4 +59,4 @@ struct HandlerImpl {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_HANDLER_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_HANDLER_IMPL_HPP
diff --git a/libsycl/src/detail/offload/offload_topology.hpp b/libsycl/src/detail/offload/offload_topology.hpp
index a9a76cc0a7669..8f743619c1e42 100644
--- a/libsycl/src/detail/offload/offload_topology.hpp
+++ b/libsycl/src/detail/offload/offload_topology.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_OFFLOAD_TOPOLOGY
-#define _LIBSYCL_OFFLOAD_TOPOLOGY
+#ifndef _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_TOPOLOGY_HPP
+#define _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_TOPOLOGY_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -42,22 +42,23 @@ struct OffloadPlatformGroup {
 
 /// Storage of platform driver groups and their device handles for a backend.
 struct OffloadTopology {
-  OffloadTopology() : MBackend(OL_PLATFORM_BACKEND_UNKNOWN) {}
-  OffloadTopology(ol_platform_backend_t OlBackend) : MBackend(OlBackend) {}
+  OffloadTopology() = default;
+  explicit OffloadTopology(ol_platform_backend_t OLBackend)
+      : MBackend(OLBackend) {}
 
   /// Updates backend for this topology.
   ///
-  /// \param B new backend value.
-  void setBackend(ol_platform_backend_t B) { MBackend = B; }
+  /// \param Backend new backend value.
+  void setBackend(ol_platform_backend_t Backend) { MBackend = Backend; }
 
   /// Queries backend of this topology.
   ///
-  /// \returns backend of this topology.
+  /// \return backend of this topology.
   ol_platform_backend_t getBackend() const { return MBackend; }
 
   /// Returns all platform driver groups associated with this topology.
   ///
-  /// \returns platform driver groups associated with this topology.
+  /// \return platform driver groups associated with this topology.
   const std::vector<OffloadPlatformGroup> &getPlatformGroups() const {
     return MPlatformGroups;
   }
@@ -81,4 +82,4 @@ void discoverOffloadDevices();
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_OFFLOAD_TOPOLOGY
+#endif // _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_TOPOLOGY_HPP
diff --git a/libsycl/src/detail/offload/offload_utils.cpp b/libsycl/src/detail/offload/offload_utils.cpp
index 0fc984e4b1792..143a495fde433 100644
--- a/libsycl/src/detail/offload/offload_utils.cpp
+++ b/libsycl/src/detail/offload/offload_utils.cpp
@@ -9,6 +9,7 @@
 #include <detail/offload/offload_utils.hpp>
 
 #include <cassert>
+#include <cstdint>
 #include <limits>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
diff --git a/libsycl/src/detail/offload/offload_utils.hpp b/libsycl/src/detail/offload/offload_utils.hpp
index 4a4512083e8ee..d5c3f56654893 100644
--- a/libsycl/src/detail/offload/offload_utils.hpp
+++ b/libsycl/src/detail/offload/offload_utils.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_OFFLOAD_UTILS
-#define _LIBSYCL_OFFLOAD_UTILS
+#ifndef _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_UTILS_HPP
+#define _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_UTILS_HPP
 
 #include <sycl/__impl/backend.hpp>
 #include <sycl/__impl/context.hpp>
@@ -25,6 +25,10 @@
 
 #include <OffloadAPI.h>
 
+#include <string>
+#include <tuple>
+#include <utility>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
@@ -35,17 +39,19 @@ class ContextImpl;
 ///
 /// \param Error liboffload error code.
 ///
-/// \returns C-string representing the name of Error as specified in enum.
+/// \return C-string representing the name of Error as specified in enum.
 const char *stringifyErrorCode(ol_errc_t Error);
 
-/// Contructs C++-string with information about liboffload error.
+/// Constructs C++-string with information about liboffload error.
 ///
-/// \param Error liboffload result of calling API.
+/// \param Result liboffload result of calling API.
 ///
-/// \returns C++-string containing all available data of failure.
+/// \return C++-string containing all available data of failure.
 inline std::string formatCodeString(ol_result_t Result) {
+  // liboffload leaves Details unset for errors it has no message for.
+  const char *Details = Result->Details ? Result->Details : "";
   return std::to_string(Result->Code) + " (" +
-         std::string(stringifyErrorCode(Result->Code)) + ") " + Result->Details;
+         std::string(stringifyErrorCode(Result->Code)) + ") " + Details;
 }
 
 inline bool isFailed(const ol_result_t &Result) { return Result != OL_SUCCESS; }
@@ -56,13 +62,13 @@ inline bool isFailed(const ol_result_t &Result) { return Result != OL_SUCCESS; }
 /// To be called when specific handling is needed and explicitly done by
 /// developer before throwing exception.
 ///
-/// \param Error liboffload result of calling API.
+/// \param Result liboffload result of calling API.
 ///
-/// \throw sycl::runtime_exception if the call was not successful.
-template <sycl::errc errc = sycl::errc::runtime>
+/// \throw sycl::exception with ErrC if the call was not successful.
+template <sycl::errc ErrC = sycl::errc::runtime>
 void checkAndThrow(ol_result_t Result) {
   if (isFailed(Result)) {
-    throw sycl::exception(sycl::make_error_code(errc),
+    throw sycl::exception(sycl::make_error_code(ErrC),
                           detail::formatCodeString(Result));
   }
 }
@@ -76,12 +82,12 @@ void checkAndThrow(ol_result_t Result) {
 /// \param Context the context the failed API call was made for.
 /// \param Result the liboffload result of calling API.
 ///
-/// \throw sycl::exception if the call was not successful.
-template <sycl::errc errc = sycl::errc::runtime>
+/// \throw sycl::exception with ErrC if the call was not successful.
+template <sycl::errc ErrC = sycl::errc::runtime>
 void checkAndThrow(ContextImpl &Context, ol_result_t Result) {
   if (isFailed(Result)) {
     throw sycl::exception(createSyclObjFromImpl<sycl::context>(Context),
-                          sycl::make_error_code(errc),
+                          sycl::make_error_code(ErrC),
                           detail::formatCodeString(Result));
   }
 }
@@ -93,7 +99,7 @@ void checkAndThrow(ContextImpl &Context, ol_result_t Result) {
 /// \param Function liboffload API function to be called.
 /// \param Args arguments to be passed to the liboffload API function.
 ///
-/// \returns liboffload error code returned by API call.
+/// \return liboffload error code returned by API call.
 template <typename FunctionType, typename... ArgsT>
 ol_result_t callNoCheck(FunctionType &Function, ArgsT &&...Args) {
   return Function(std::forward<ArgsT>(Args)...);
@@ -104,7 +110,8 @@ ol_result_t callNoCheck(FunctionType &Function, ArgsT &&...Args) {
 /// \param Function liboffload API function to be called.
 /// \param Args arguments to be passed to the liboffload API function.
 ///
-/// \throw sycl::runtime_exception if the call was not successful.
+/// \throw sycl::exception with sycl::errc::runtime if the call was not
+/// successful.
 template <typename FunctionType, typename... ArgsT>
 void callAndThrow(FunctionType &Function, ArgsT &&...Args) {
   auto Err = callNoCheck(Function, std::forward<ArgsT>(Args)...);
@@ -117,7 +124,8 @@ void callAndThrow(FunctionType &Function, ArgsT &&...Args) {
 /// \param Function the liboffload API function to be called.
 /// \param Args the arguments to be passed to the liboffload API function.
 ///
-/// \throw sycl::exception if the call was not successful.
+/// \throw sycl::exception with sycl::errc::runtime if the call was not
+/// successful.
 template <typename FunctionType, typename... ArgsT>
 void callAndThrow(ContextImpl &Context, FunctionType &Function,
                   ArgsT &&...Args) {
@@ -129,51 +137,55 @@ void callAndThrow(ContextImpl &Context, FunctionType &Function,
 ///
 /// \param Backend liboffload backend.
 ///
-/// \returns sycl::backend matching specified liboffload backend.
+/// \return sycl::backend matching specified liboffload backend.
 backend convertBackend(ol_platform_backend_t Backend);
 
 /// Converts SYCL device type to liboffload type.
 ///
 /// \param DeviceType SYCL device type.
 ///
-/// \returns ol_device_type_t matching specified SYCL device type.
+/// \return ol_device_type_t matching specified SYCL device type.
 ol_device_type_t convertDeviceTypeToOL(info::device_type DeviceType);
 
 /// Converts liboffload device type to SYCL type.
 ///
 /// \param DeviceType liboffload device type.
 ///
-/// \returns SYCL device type matching specified liboffload device type.
+/// \return SYCL device type matching specified liboffload device type.
 info::device_type convertDeviceTypeToSYCL(ol_device_type_t DeviceType);
 
 /// Converts a SYCL USM kind to a liboffload type.
 ///
 /// \param USMKind a SYCL USM kind.
 ///
-/// \returns ol_alloc_type_t matching the specified SYCL USM kind.
+/// \return ol_alloc_type_t matching the specified SYCL USM kind.
 ol_alloc_type_t getOlAllocType(usm::alloc USMKind);
 
+/// Helper for static assertions in the discarded branch of an if constexpr.
+template <typename> inline constexpr bool AlwaysFalse = false;
+
 /// Helper to map SYCL information descriptors to OL_<HANDLE>_INFO_<SMTH>.
 ///
 /// Typical usage:
 /// \code
-///   using Map = info_ol_mapping<ol_foo_info_t>;
-///   constexpr auto olInfo = map_info_desc<FromDesc, ol_foo_info_t>(
-///                                            Map::M<DescVal0>{OL_FOO_INFO_VAL0},
-///                                            Map::M<DescVal1>{OL_FOO_INFO_VAL1},
-///                                          ...)
+///   using Map = InfoOLMapping<ol_foo_info_t>;
+///   constexpr auto OLInfo = mapInfoDesc<FromDesc, ol_foo_info_t>(
+///       Map::M<DescVal0>{OL_FOO_INFO_VAL0},
+///       Map::M<DescVal1>{OL_FOO_INFO_VAL1},
+///       ...)
 /// \endcode
-template <typename To> struct info_ol_mapping {
+template <typename To> struct InfoOLMapping {
   template <typename From> struct M {
-    To value;
-    constexpr M(To value) : value(value) {}
+    To Value;
+    constexpr M(To Val) : Value(Val) {}
   };
 };
 template <typename From, typename To, typename... Ts>
-constexpr To map_info_desc(typename info_ol_mapping<To>::template M<Ts>... ms) {
-  return std::get<typename info_ol_mapping<To>::template M<From>>(
-             std::tuple{ms...})
-      .value;
+constexpr To
+mapInfoDesc(typename InfoOLMapping<To>::template M<Ts>... Mappings) {
+  return std::get<typename InfoOLMapping<To>::template M<From>>(
+             std::tuple{Mappings...})
+      .Value;
 }
 
 /// Converts a UnifiedRangeView into the liboffload
@@ -184,4 +196,4 @@ ol_kernel_launch_size_args_t convertToOlRange(const UnifiedRangeView &Range);
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_OFFLOAD_UTILS
+#endif // _LIBSYCL_SRC_DETAIL_OFFLOAD_OFFLOAD_UTILS_HPP
diff --git a/libsycl/src/detail/platform_impl.cpp b/libsycl/src/detail/platform_impl.cpp
index 3e09741a9d6c8..91e699e149d55 100644
--- a/libsycl/src/detail/platform_impl.cpp
+++ b/libsycl/src/detail/platform_impl.cpp
@@ -16,13 +16,15 @@
 #include <detail/platform_impl.hpp>
 
 #include <algorithm>
+#include <cassert>
 #include <memory>
+#include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
 
-bool PlatformImpl::rediscoverIfEmpty = false;
+bool PlatformImpl::MRediscoverIfEmpty = false;
 
 const std::vector<PlatformImplUPtr> &PlatformImpl::getPlatforms() {
   static auto InitPlatforms = []() {
@@ -47,7 +49,7 @@ const std::vector<PlatformImplUPtr> &PlatformImpl::getPlatforms() {
     return true;
   }();
   auto &PlatformCache = getPlatformCache();
-  if (rediscoverIfEmpty && PlatformCache.empty())
+  if (MRediscoverIfEmpty && PlatformCache.empty())
     InitPlatforms();
 
   return PlatformCache;
@@ -92,7 +94,7 @@ bool PlatformImpl::has(aspect Aspect) const {
 
 void PlatformImpl::iterateDevices(
     info::device_type DeviceType,
-    std::function<void(DeviceImpl *)> callback) const {
+    const std::function<void(DeviceImpl *)> &Callback) const {
   // Early exit if host/custom/accelerator device is requested:
   // - host device is deprecated and not required by the SYCL 2020
   // specification.
@@ -110,14 +112,14 @@ void PlatformImpl::iterateDevices(
   // As a temporal solution just return the first device for DeviceType ==
   // automatic.
   if (DeviceType == info::device_type::automatic) {
-    callback(DeviceImpls[0].get());
+    Callback(DeviceImpls[0].get());
     return;
   }
 
   bool KeepAll = DeviceType == info::device_type::all;
   for (auto &Impl : DeviceImpls) {
     if (KeepAll || DeviceType == Impl->getDeviceType())
-      callback(Impl.get());
+      Callback(Impl.get());
   }
 }
 
diff --git a/libsycl/src/detail/platform_impl.hpp b/libsycl/src/detail/platform_impl.hpp
index 5926403f96b1e..6233dabe08f9e 100644
--- a/libsycl/src/detail/platform_impl.hpp
+++ b/libsycl/src/detail/platform_impl.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_PLATFORM_IMPL
-#define _LIBSYCL_PLATFORM_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_PLATFORM_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_PLATFORM_IMPL_HPP
 
 #include <sycl/__impl/backend.hpp>
 #include <sycl/__impl/detail/config.hpp>
@@ -24,6 +24,7 @@
 
 #include <OffloadAPI.h>
 
+#include <cassert>
 #include <functional>
 #include <memory>
 #include <string>
@@ -63,13 +64,13 @@ class PlatformImpl {
 
   ~PlatformImpl() = default;
 
-  /// \returns sycl::backend associated with this platform.
+  /// \return sycl::backend associated with this platform.
   backend getBackend() const noexcept { return MBackend; }
 
   /// Returns all SYCL platforms from all backends that are
   /// available in the system.
   ///
-  /// \returns std::vector of all platforms that are available in the system.
+  /// \return std::vector of all platforms that are available in the system.
   static const std::vector<PlatformImplUPtr> &getPlatforms();
 
   /// Returns the raw underlying offload platform handle.
@@ -97,31 +98,36 @@ class PlatformImpl {
   /// The return type depends on information being queried.
   template <typename Param> typename Param::return_type getInfo() const {
     // For now we have only std::string properties
-    static_assert(std::is_same_v<typename Param::return_type, std::string>);
+    static_assert(std::is_same_v<typename Param::return_type, std::string>,
+                  "Only string platform info descriptors are supported");
 
     using namespace info::platform;
-    using Map = info_ol_mapping<ol_platform_info_t>;
+    using Map = InfoOLMapping<ol_platform_info_t>;
 
-    constexpr ol_platform_info_t olInfo =
-        map_info_desc<Param, ol_platform_info_t>(
+    constexpr ol_platform_info_t OLInfo =
+        mapInfoDesc<Param, ol_platform_info_t>(
             Map::M<version>{OL_PLATFORM_INFO_VERSION},
             Map::M<name>{OL_PLATFORM_INFO_NAME},
             Map::M<vendor>{OL_PLATFORM_INFO_VENDOR_NAME});
 
     size_t ExpectedSize = 0;
-    callAndThrow(olGetPlatformInfoSize, MOffloadPlatform, olInfo,
+    callAndThrow(olGetPlatformInfoSize, MOffloadPlatform, OLInfo,
                  &ExpectedSize);
+    assert(ExpectedSize > 0 && "String info descriptor size must account for "
+                               "the null terminator");
+    // liboffload counts the null terminator in the size while std::string
+    // doesn't.
     std::string Result;
     Result.resize(ExpectedSize - 1);
-    callAndThrow(olGetPlatformInfo, MOffloadPlatform, olInfo, ExpectedSize,
+    callAndThrow(olGetPlatformInfo, MOffloadPlatform, OLInfo, ExpectedSize,
                  Result.data());
     return Result;
   }
 
-  /// Calls "callback" with every root device of type == DeviceType associated
-  /// with this platform
+  /// Calls Callback with every root device of type == DeviceType associated
+  /// with this platform.
   void iterateDevices(info::device_type DeviceType,
-                      std::function<void(DeviceImpl *)> callback) const;
+                      const std::function<void(DeviceImpl *)> &Callback) const;
 
   /// \return the default context containing all devices in this platform.
   ContextImpl &getDefaultContext();
@@ -142,11 +148,11 @@ class PlatformImpl {
   // unittests for this behavior. This flag and friend class allows to force
   // device & platform rediscovery at the next getPlatforms() call if the cache
   // is empty.
-  static bool rediscoverIfEmpty;
+  static bool MRediscoverIfEmpty;
   friend struct ::sycl::unittests::UnittestsHelper;
 };
 
 } // namespace detail
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_PLATFORM_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_PLATFORM_IMPL_HPP
diff --git a/libsycl/src/detail/program_manager.cpp b/libsycl/src/detail/program_manager.cpp
index 12a38a8b75053..598c9529b1d78 100644
--- a/libsycl/src/detail/program_manager.cpp
+++ b/libsycl/src/detail/program_manager.cpp
@@ -19,6 +19,10 @@ _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_BEGIN
 #include <llvm/Frontend/Offloading/Utility.h>
 _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_END
 
+#include <cassert>
+#include <string>
+#include <utility>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace detail {
 
@@ -29,8 +33,12 @@ getDeviceKernelInfo(std::string_view KernelName) {
 
 DeviceKernelInfo &
 ProgramAndKernelManager::getDeviceKernelInfo(std::string_view KernelName) {
+  std::lock_guard<std::mutex> Guard(MDataCollectionMutex);
   auto It = MDeviceKernelInfoMap.find(KernelName);
-  assert(It != MDeviceKernelInfoMap.end());
+  if (It == MDeviceKernelInfoMap.end())
+    throw sycl::exception(sycl::make_error_code(sycl::errc::runtime),
+                          "No registered device image provides kernel " +
+                              std::string(KernelName));
   return It->second;
 }
 
@@ -91,33 +99,34 @@ void ProgramAndKernelManager::registerFatBin(const void *BinaryStart,
   DeviceImageManagerVec Images;
   Images.reserve(BinOrErr->size());
 
-  std::lock_guard<std::mutex> Guard(MDataCollectionMutex);
   for (std::unique_ptr<llvm::object::OffloadBinary> &OB : *BinOrErr) {
     if (!checkDeviceImageValidity(*OB))
       throw sycl::exception(sycl::make_error_code(sycl::errc::runtime),
                             "Incompatible device image.");
 
-    llvm::StringRef Symbols = OB->getString("symbols");
-
     Images.push_back(std::make_unique<DeviceImageManager>(std::move(OB)));
-    DeviceImageManager &NewImageWrapper = *Images.back();
-
-    llvm::offloading::sycl::forEachSymbol(Symbols, [&](llvm::StringRef Name) {
-      auto It = MDeviceKernelInfoMap.find(std::string_view(Name));
-      if (It == MDeviceKernelInfoMap.end()) {
-        [[maybe_unused]] auto [Iterator, EmplaceSucceeded] =
-            MDeviceKernelInfoMap.emplace(
-                std::piecewise_construct,
-                std::forward_as_tuple(std::string_view(Name)),
-                std::forward_as_tuple(std::string_view(Name), NewImageWrapper));
-        assert(EmplaceSucceeded && "Kernel name found in multiple images");
-      }
-    });
   }
 
-  [[maybe_unused]] auto [It, Inserted] =
+  std::lock_guard<std::mutex> Guard(MDataCollectionMutex);
+  // The kernel info entries below hold references to the image managers, so the
+  // images have to be installed first: nothing may be recorded in
+  // MDeviceKernelInfoMap until their owner is in place and unregisterFatBin()
+  // can reach it.
+  auto [ImagesIt, Inserted] =
       MDeviceImageManagers.emplace(BinaryStart, std::move(Images));
   assert(Inserted && "Fat binary registered twice");
+  if (!Inserted)
+    return;
+
+  for (const std::unique_ptr<DeviceImageManager> &Image : ImagesIt->second) {
+    llvm::StringRef Symbols = Image->getOffloadBinary().getString("symbols");
+    llvm::offloading::sycl::forEachSymbol(Symbols, [&](llvm::StringRef Name) {
+      // A kernel name may be provided by several images of the same fat binary;
+      // the first one that provides it wins.
+      MDeviceKernelInfoMap.try_emplace(std::string_view(Name),
+                                       std::string_view(Name), *Image);
+    });
+  }
 }
 
 void ProgramAndKernelManager::unregisterFatBin(const void *BinaryStart,
@@ -177,8 +186,8 @@ ol_symbol_handle_t ProgramAndKernelManager::getOrCreateKernel(
 
   if (!isImageCompatible(DeviceImage, Device))
     throw exception(make_error_code(errc::runtime),
-                    std::string("No compatible image for ") +
-                        KernelInfo.getName().data() + " was found");
+                    "No compatible image for " +
+                        std::string(KernelInfo.getName()) + " was found");
 
   // Track the context before it caches anything, so that unregisterFatBin() can
   // reach the programs it is about to create.
diff --git a/libsycl/src/detail/program_manager.hpp b/libsycl/src/detail/program_manager.hpp
index afe660add63f7..47db03a59c042 100644
--- a/libsycl/src/detail/program_manager.hpp
+++ b/libsycl/src/detail/program_manager.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_PROGRAM_MANAGER
-#define _LIBSYCL_PROGRAM_MANAGER
+#ifndef _LIBSYCL_SRC_DETAIL_PROGRAM_MANAGER_HPP
+#define _LIBSYCL_SRC_DETAIL_PROGRAM_MANAGER_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -28,8 +28,10 @@ _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_END
 
 #include <OffloadAPI.h>
 
+#include <cstddef>
 #include <memory>
 #include <mutex>
+#include <string_view>
 #include <unordered_map>
 #include <vector>
 
@@ -150,4 +152,4 @@ class ProgramAndKernelManager {
 } // namespace detail
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_PROGRAM_MANAGER
+#endif // _LIBSYCL_SRC_DETAIL_PROGRAM_MANAGER_HPP
diff --git a/libsycl/src/detail/queue_impl.cpp b/libsycl/src/detail/queue_impl.cpp
index 5163d8e795673..aa9dca26038ff 100644
--- a/libsycl/src/detail/queue_impl.cpp
+++ b/libsycl/src/detail/queue_impl.cpp
@@ -16,16 +16,23 @@
 #include <detail/program_manager.hpp>
 
 #include <algorithm>
+#include <cassert>
 #include <cstdint>
+#include <string>
+#include <tuple>
+#include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 namespace detail {
 
+namespace {
+
 thread_local bool NestedCallsDetector = false;
+
 class NestedCallsTracker {
 public:
-  NestedCallsTracker(ContextImpl &QueueContext) {
+  explicit NestedCallsTracker(ContextImpl &QueueContext) {
     if (NestedCallsDetectorRef)
       throw sycl::exception(
           createSyclObjFromImpl<context>(QueueContext),
@@ -42,11 +49,13 @@ class NestedCallsTracker {
   bool &NestedCallsDetectorRef = NestedCallsDetector;
 };
 
-QueueImpl::QueueImpl(const std::shared_ptr<ContextImpl> &contextImpl,
-                     DeviceImpl &deviceImpl, const async_handler &asyncHandler,
-                     const property_list &propList, PrivateTag)
-    : MIsInorder(false), MAsyncHandler(asyncHandler), MPropList(propList),
-      MDevice(deviceImpl), MContext(contextImpl) {
+} // namespace
+
+QueueImpl::QueueImpl(const std::shared_ptr<ContextImpl> &Context,
+                     DeviceImpl &Device, const async_handler &AsyncHandler,
+                     const property_list &PropList, PrivateTag)
+    : MIsInOrder(false), MAsyncHandler(AsyncHandler), MPropList(PropList),
+      MDevice(Device), MContext(Context) {
   assert(MContext && "Context impl ptr can't be nullptr");
 
   ol_result_t Err = callNoCheck(olCreateQueue, MContext->getOLHandleRef(),
@@ -131,7 +140,7 @@ void QueueImpl::submitKernelImpl(DeviceKernelInfo &KernelInfo, void *ArgData,
   ol_symbol_handle_t Kernel =
       detail::ProgramAndKernelManager::getInstance().getOrCreateKernel(
           KernelInfo, MContext, MDevice);
-  assert(Kernel);
+  assert(Kernel && "Kernel symbol can't be nullptr");
 
   handleEventDependencies(MCurrentSubmitInfo.DepEvents);
 
@@ -142,25 +151,25 @@ void QueueImpl::submitKernelImpl(DeviceKernelInfo &KernelInfo, void *ArgData,
   size_t ArgSizes[] = {ArgSize};
   auto Result =
       olLaunchKernel(MOffloadQueue, MDevice.getOLHandle(), Kernel,
-                     &MCurrentSubmitInfo.Range, NULL, 1, ArgPtrs, ArgSizes);
+                     &MCurrentSubmitInfo.Range, nullptr, 1, ArgPtrs, ArgSizes);
 
   if (isFailed(Result))
     throw sycl::exception(createSyclObjFromImpl<context>(*MContext),
                           sycl::make_error_code(sycl::errc::runtime),
-                          std::string("Kernel submission (") +
-                              KernelInfo.getName().data() + ") failed with " +
-                              formatCodeString(Result));
+                          "Kernel submission (" +
+                              std::string(KernelInfo.getName()) +
+                              ") failed with " + formatCodeString(Result));
 
   MCurrentSubmitInfo.LastEvent =
       createEvent(std::move(MCurrentSubmitInfo.DepEvents));
 }
 
 static ol_device_handle_t getAllocDevice(ContextImpl &Context,
-                                         const void *ptr) {
+                                         const void *Ptr) {
   // TODO: consider caching this information to avoid querying it every time.
   ol_device_handle_t Device{};
-  [[maybe_unused]] ol_result_t Result =
-      callNoCheck(olGetMemInfo, Context.getOLHandleRef(), ptr,
+  ol_result_t Result =
+      callNoCheck(olGetMemInfo, Context.getOLHandleRef(), Ptr,
                   OL_MEM_INFO_DEVICE, sizeof(ol_device_handle_t), &Device);
   if (detail::isFailed(Result)) {
     // NOT_FOUND: the pointer isn't a liboffload allocation at all (plain host
@@ -173,13 +182,13 @@ static ol_device_handle_t getAllocDevice(ContextImpl &Context,
     checkAndThrow(Context, Result);
   }
 
-  assert(Device);
+  assert(Device && "Device handle can't be nullptr");
   return Device;
 }
 
-std::shared_ptr<EventImpl>
-QueueImpl::memcpy(void *Dest, const void *Src, std::size_t NumBytes,
-                  const std::vector<EventImplPtr> &DepEvents) {
+EventImplPtr QueueImpl::memcpy(void *Dest, const void *Src,
+                               std::size_t NumBytes,
+                               const std::vector<EventImplPtr> &DepEvents) {
   assert(MContext && "Context impl ptr can't be nullptr");
   checkEventsPlatformMatch(DepEvents, *MContext);
   if (NumBytes == 0)
@@ -276,7 +285,7 @@ EventImplPtr QueueImpl::submitWithHandler(const TypelessCGF &CGF) {
   detail::HandlerImpl HandlerImplVal(*this);
   handler Handler(HandlerImplVal);
   {
-    NestedCallsTracker tracker(*MContext);
+    NestedCallsTracker Tracker(*MContext);
     CGF(Handler);
   }
 
diff --git a/libsycl/src/detail/queue_impl.hpp b/libsycl/src/detail/queue_impl.hpp
index 1b6bee63251f6..34fc6391ae92b 100644
--- a/libsycl/src/detail/queue_impl.hpp
+++ b/libsycl/src/detail/queue_impl.hpp
@@ -12,15 +12,18 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_QUEUE_IMPL
-#define _LIBSYCL_QUEUE_IMPL
+#ifndef _LIBSYCL_SRC_DETAIL_QUEUE_IMPL_HPP
+#define _LIBSYCL_SRC_DETAIL_QUEUE_IMPL_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/queue.hpp>
 
 #include <OffloadAPI.h>
 
+#include <cassert>
+#include <cstddef>
 #include <memory>
+#include <utility>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
@@ -40,22 +43,23 @@ class QueueImpl : public std::enable_shared_from_this<QueueImpl> {
 public:
   ~QueueImpl();
 
-  /// Constructs a SYCL queue from a device using an asyncHandler and
-  /// a propList.
+  /// Constructs a SYCL queue from a device using an AsyncHandler and
+  /// a PropList.
   ///
-  /// \param deviceImpl is a SYCL device that is used to dispatch tasks
+  /// \param Context is a SYCL context the queue is associated with.
+  /// \param Device is a SYCL device that is used to dispatch tasks
   /// submitted to the queue.
-  /// \param asyncHandler is a SYCL asynchronous exception handler.
-  /// \param propList is a list of properties to use for queue construction.
-  explicit QueueImpl(const std::shared_ptr<ContextImpl> &contextImpl,
-                     DeviceImpl &deviceImpl, const async_handler &asyncHandler,
-                     const property_list &propList, PrivateTag);
+  /// \param AsyncHandler is a SYCL asynchronous exception handler.
+  /// \param PropList is a list of properties to use for queue construction.
+  explicit QueueImpl(const std::shared_ptr<ContextImpl> &Context,
+                     DeviceImpl &Device, const async_handler &AsyncHandler,
+                     const property_list &PropList, PrivateTag);
 
   /// Constructs a QueueImpl with the provided arguments. Variadic helper.
   /// Restricts QueueImpl creation to std::shared_ptr allocations.
   template <typename... Ts>
-  static std::shared_ptr<QueueImpl> create(Ts &&...args) {
-    return std::make_shared<QueueImpl>(std::forward<Ts>(args)..., PrivateTag{});
+  static std::shared_ptr<QueueImpl> create(Ts &&...Args) {
+    return std::make_shared<QueueImpl>(std::forward<Ts>(Args)..., PrivateTag{});
   }
 
   /// \return the SYCL backend this queue is associated with.
@@ -72,7 +76,7 @@ class QueueImpl : public std::enable_shared_from_this<QueueImpl> {
   DeviceImpl &getDevice() { return MDevice; }
 
   /// \return true if and only if the queue is in order.
-  bool isInOrder() const { return MIsInorder; }
+  bool isInOrder() const { return MIsInOrder; }
 
   /// Waits for completion of all commands submitted to this queue.
   void wait();
@@ -167,12 +171,12 @@ class QueueImpl : public std::enable_shared_from_this<QueueImpl> {
                         const std::vector<EventImplPtr> &DepEvents);
 
 private:
-  void handleEventDependencies(const std::vector<EventImplPtr> &Dep);
+  void handleEventDependencies(const std::vector<EventImplPtr> &Deps);
   EventImplPtr createEvent(std::vector<EventImplPtr> &&Deps = {});
 
   // Queue features.
   ol_queue_handle_t MOffloadQueue = {};
-  const bool MIsInorder;
+  const bool MIsInOrder;
   const async_handler MAsyncHandler;
   const property_list MPropList;
   DeviceImpl &MDevice;
@@ -193,4 +197,4 @@ class QueueImpl : public std::enable_shared_from_this<QueueImpl> {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_QUEUE_IMPL
+#endif // _LIBSYCL_SRC_DETAIL_QUEUE_IMPL_HPP
diff --git a/libsycl/src/detail/spinlock.hpp b/libsycl/src/detail/spinlock.hpp
index a8898a4e68463..82d5453dac4cd 100644
--- a/libsycl/src/detail/spinlock.hpp
+++ b/libsycl/src/detail/spinlock.hpp
@@ -11,8 +11,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_SPINLOCK
-#define _LIBSYCL_SPINLOCK
+#ifndef _LIBSYCL_SRC_DETAIL_SPINLOCK_HPP
+#define _LIBSYCL_SRC_DETAIL_SPINLOCK_HPP
 
 #include <sycl/__impl/detail/config.hpp>
 
@@ -44,4 +44,4 @@ class SpinLock {
 
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif // _LIBSYCL_SPINLOCK
+#endif // _LIBSYCL_SRC_DETAIL_SPINLOCK_HPP
diff --git a/libsycl/src/detail/suppress_extra_warnings.hpp b/libsycl/src/detail/suppress_extra_warnings.hpp
index e6fcbb65a432e..8b1645ab34d37 100644
--- a/libsycl/src/detail/suppress_extra_warnings.hpp
+++ b/libsycl/src/detail/suppress_extra_warnings.hpp
@@ -12,8 +12,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBSYCL_SUPPRESS_EXTRA_WARNINGS
-#define _LIBSYCL_SUPPRESS_EXTRA_WARNINGS
+#ifndef _LIBSYCL_SRC_DETAIL_SUPPRESS_EXTRA_WARNINGS_HPP
+#define _LIBSYCL_SRC_DETAIL_SUPPRESS_EXTRA_WARNINGS_HPP
 
 #define _LIBSYCL_DO_PRAGMA(x) _Pragma(#x)
 #define _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_BEGIN                                 \
@@ -22,4 +22,4 @@
 #define _LIBSYCL_SUPPRESS_EXTRA_WARNINGS_END                                   \
   _LIBSYCL_DO_PRAGMA(GCC diagnostic pop)
 
-#endif // _LIBSYCL_SUPPRESS_EXTRA_WARNINGS
+#endif // _LIBSYCL_SRC_DETAIL_SUPPRESS_EXTRA_WARNINGS_HPP
diff --git a/libsycl/src/device.cpp b/libsycl/src/device.cpp
index eca7beb49cb4f..c9ba322ab63ab 100644
--- a/libsycl/src/device.cpp
+++ b/libsycl/src/device.cpp
@@ -11,7 +11,7 @@
 #include <detail/device_impl.hpp>
 #include <detail/platform_impl.hpp>
 
-#include <algorithm>
+#include <cassert>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -27,55 +27,54 @@ platform device::get_platform() const {
 
 backend device::get_backend() const noexcept { return impl->getBackend(); }
 
-std::vector<device> device::get_devices(info::device_type DeviceType) {
+std::vector<device> device::get_devices(info::device_type type) {
   std::vector<device> Devices;
 
   // Not calling platform::get_devices to avoid multiple vector packing
-  for (auto &PlatformImpl : detail::PlatformImpl::getPlatforms()) {
-    assert(PlatformImpl && "PlatformImpl can not be nullptr");
-    PlatformImpl->iterateDevices(
-        DeviceType, [&Devices](detail::DeviceImpl *DevImpl) {
-          assert(DevImpl && "Device impl can't be nullptr");
-          Devices.push_back(detail::createSyclObjFromImpl<device>(*DevImpl));
-        });
+  for (const auto &Impl : detail::PlatformImpl::getPlatforms()) {
+    assert(Impl && "PlatformImpl can not be nullptr");
+    Impl->iterateDevices(type, [&Devices](detail::DeviceImpl *DevImpl) {
+      assert(DevImpl && "Device impl can't be nullptr");
+      Devices.push_back(detail::createSyclObjFromImpl<device>(*DevImpl));
+    });
   }
 
   return Devices;
 }
 
-template <info::partition_property prop>
-std::vector<device> device::create_sub_devices(size_t ComputeUnits) const {
+template <info::partition_property Prop>
+std::vector<device> device::create_sub_devices(std::size_t /*count*/) const {
   throw exception(make_error_code(errc::feature_not_supported),
                   "Partitioning is not supported.");
 }
 
 template _LIBSYCL_EXPORT std::vector<device>
 device::create_sub_devices<info::partition_property::partition_equally>(
-    size_t ComputeUnits) const;
+    std::size_t count) const;
 
-template <info::partition_property prop>
+template <info::partition_property Prop>
 std::vector<device>
-device::create_sub_devices(const std::vector<size_t> &Counts) const {
+device::create_sub_devices(const std::vector<std::size_t> & /*counts*/) const {
   throw exception(make_error_code(errc::feature_not_supported),
                   "Partitioning is not supported.");
 }
 
 template _LIBSYCL_EXPORT std::vector<device>
 device::create_sub_devices<info::partition_property::partition_by_counts>(
-    const std::vector<size_t> &Counts) const;
+    const std::vector<std::size_t> &counts) const;
 
-template <info::partition_property prop>
+template <info::partition_property Prop>
 std::vector<device> device::create_sub_devices(
-    info::partition_affinity_domain AffinityDomain) const {
+    info::partition_affinity_domain /*affinityDomain*/) const {
   throw exception(make_error_code(errc::feature_not_supported),
                   "Partitioning is not supported.");
 }
 
 template _LIBSYCL_EXPORT std::vector<device> device::create_sub_devices<
     info::partition_property::partition_by_affinity_domain>(
-    info::partition_affinity_domain AffinityDomain) const;
+    info::partition_affinity_domain affinityDomain) const;
 
-bool device::has(aspect Aspect) const { return impl->has(Aspect); }
+bool device::has(aspect asp) const { return impl->has(asp); }
 
 template <typename Param>
 detail::is_device_info_desc_t<Param> device::get_info() const {
diff --git a/libsycl/src/device_selector.cpp b/libsycl/src/device_selector.cpp
index f53f98d1f5bb2..ac77a3f13e587 100644
--- a/libsycl/src/device_selector.cpp
+++ b/libsycl/src/device_selector.cpp
@@ -27,13 +27,13 @@ static constexpr int LevelZeroBonus = 50;
 
 static int getDevicePreference(const device &Device) {
   int Score = 0;
-  const auto &DeviceImpl = detail::getSyclObjImpl(Device);
+  detail::DeviceImpl *Impl = detail::getSyclObjImpl(Device);
 
   auto &ProgramManager = detail::ProgramAndKernelManager::getInstance();
-  if (ProgramManager.hasCompatibleImage(*DeviceImpl))
+  if (ProgramManager.hasCompatibleImage(*Impl))
     Score += CompatibleImageBonus;
 
-  if (DeviceImpl->getBackend() == backend::level_zero)
+  if (Impl->getBackend() == backend::level_zero)
     Score += LevelZeroBonus;
 
   return Score;
@@ -52,39 +52,39 @@ _LIBSYCL_EXPORT int default_selector_v(const device &dev) {
   return Score;
 }
 
-_LIBSYCL_EXPORT int gpu_selector_v(const device &Dev) {
-  return Dev.is_gpu() ? MatchedTypeDefaultScore + getDevicePreference(Dev)
+_LIBSYCL_EXPORT int gpu_selector_v(const device &dev) {
+  return dev.is_gpu() ? MatchedTypeDefaultScore + getDevicePreference(dev)
                       : RejectDeviceScore;
 }
 
-_LIBSYCL_EXPORT int cpu_selector_v(const device &Dev) {
-  return Dev.is_cpu() ? MatchedTypeDefaultScore + getDevicePreference(Dev)
+_LIBSYCL_EXPORT int cpu_selector_v(const device &dev) {
+  return dev.is_cpu() ? MatchedTypeDefaultScore + getDevicePreference(dev)
                       : RejectDeviceScore;
 }
 
-_LIBSYCL_EXPORT int accelerator_selector_v(const device &Dev) {
-  return Dev.is_accelerator()
-             ? MatchedTypeDefaultScore + getDevicePreference(Dev)
+_LIBSYCL_EXPORT int accelerator_selector_v(const device &dev) {
+  return dev.is_accelerator()
+             ? MatchedTypeDefaultScore + getDevicePreference(dev)
              : RejectDeviceScore;
 }
 
 _LIBSYCL_EXPORT detail::DeviceSelectorInvocableType
-aspect_selector(const std::vector<aspect> &RequireList,
-                const std::vector<aspect> &DenyList) {
+aspect_selector(const std::vector<aspect> &aspectList,
+                const std::vector<aspect> &denyList) {
   return [=](const sycl::device &Dev) {
     // 4.6.1.1. Device selector:
     // If no aspects are passed in, the generated selector behaves like
     // default_selector_v.
-    if (RequireList.empty() && DenyList.empty())
+    if (aspectList.empty() && denyList.empty())
       return default_selector_v(Dev);
 
     auto HasAspect = [&Dev](const aspect &Aspect) -> bool {
       return Dev.has(Aspect);
     };
-    if (!std::all_of(RequireList.begin(), RequireList.end(), HasAspect))
+    if (!std::all_of(aspectList.begin(), aspectList.end(), HasAspect))
       return RejectDeviceScore;
 
-    if (std::any_of(DenyList.begin(), DenyList.end(), HasAspect))
+    if (std::any_of(denyList.begin(), denyList.end(), HasAspect))
       return RejectDeviceScore;
 
     return MatchedTypeDefaultScore + getDevicePreference(Dev);
@@ -104,7 +104,7 @@ SelectDevice(const DeviceSelectorInvocableType &DeviceSelector) {
     if (CurrentDevScore < 0)
       continue;
 
-    if ((ChosenDeviceScore < CurrentDevScore) ||
+    if (!ChosenDevice || (ChosenDeviceScore < CurrentDevScore) ||
         ((ChosenDeviceScore == CurrentDevScore) &&
          (getDevicePreference(*ChosenDevice) < getDevicePreference(Device)))) {
       ChosenDevice = &Device;
diff --git a/libsycl/src/event.cpp b/libsycl/src/event.cpp
index 6994790ab537a..864f308de9645 100644
--- a/libsycl/src/event.cpp
+++ b/libsycl/src/event.cpp
@@ -11,26 +11,27 @@
 
 #include <detail/event_impl.hpp>
 
+#include <memory>
+#include <vector>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 event::event() : impl(detail::EventImpl::createDefaultEvent()) {}
 
 backend event::get_backend() const noexcept { return impl->getBackend(); }
 
-void event::wait(const std::vector<event> &EventList) {
-  for (auto Event : EventList) {
-    Event.wait();
-  }
+void event::wait(const std::vector<event> &eventList) {
+  for (const event &Event : eventList)
+    detail::getSyclObjImpl(Event)->wait();
 }
 
 void event::wait() { impl->wait(); }
 
 void event::wait_and_throw() { impl->waitAndThrow(); }
 
-void event::wait_and_throw(const std::vector<event> &EventList) {
-  for (auto E : EventList) {
-    E.wait_and_throw();
-  }
+void event::wait_and_throw(const std::vector<event> &eventList) {
+  for (const event &Event : eventList)
+    detail::getSyclObjImpl(Event)->waitAndThrow();
 }
 
 std::vector<event> event::get_wait_list() {
diff --git a/libsycl/src/exception.cpp b/libsycl/src/exception.cpp
index 4db4cff50f9f2..1abca61fc29b3 100644
--- a/libsycl/src/exception.cpp
+++ b/libsycl/src/exception.cpp
@@ -10,19 +10,21 @@
 #include <sycl/__impl/detail/config.hpp>
 #include <sycl/__impl/exception.hpp>
 
+#include <utility>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
-namespace detail {
+namespace {
 class SYCLCategory : public std::error_category {
 public:
   const char *name() const noexcept override { return "sycl"; }
   std::string message(int) const override { return "SYCL Error"; }
 };
-} // namespace detail
+} // namespace
 
 // Free functions
 const std::error_category &sycl_category() noexcept {
-  static const detail::SYCLCategory SYCLCategoryObj;
+  static const SYCLCategory SYCLCategoryObj;
   return SYCLCategoryObj;
 }
 
@@ -33,8 +35,8 @@ std::error_code make_error_code(sycl::errc e) noexcept {
 // Exception methods implementation
 exception::exception(std::error_code EC, std::shared_ptr<context> SharedPtrCtx,
                      const char *WhatArg)
-    : MMessage(std::make_shared<std::string>(WhatArg)), MContext(SharedPtrCtx),
-      MErrC(EC) {}
+    : MMessage(std::make_shared<std::string>(WhatArg)),
+      MContext(std::move(SharedPtrCtx)), MErrC(EC) {}
 
 exception::~exception() = default;
 
diff --git a/libsycl/src/exception_list.cpp b/libsycl/src/exception_list.cpp
index 61409fd6db77f..e6ea5d5712025 100644
--- a/libsycl/src/exception_list.cpp
+++ b/libsycl/src/exception_list.cpp
@@ -15,7 +15,9 @@ _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 exception_list::size_type exception_list::size() const { return MList.size(); }
 
-exception_list::iterator exception_list::begin() const { return MList.begin(); }
+exception_list::iterator exception_list::begin() const {
+  return MList.cbegin();
+}
 
 exception_list::iterator exception_list::end() const { return MList.cend(); }
 
@@ -26,13 +28,15 @@ void detail::addAsyncException(exception_list &List,
 
 void detail::defaultAsyncHandler(exception_list Exceptions) {
   std::cerr << "Default async_handler caught exceptions:";
-  for (auto &EIt : Exceptions) {
+  for (const std::exception_ptr &ExceptionPtr : Exceptions) {
     try {
-      if (EIt) {
-        std::rethrow_exception(EIt);
+      if (ExceptionPtr) {
+        std::rethrow_exception(ExceptionPtr);
       }
     } catch (const std::exception &E) {
       std::cerr << "\n\t" << E.what();
+    } catch (...) {
+      std::cerr << "\n\tUnknown exception";
     }
   }
   std::cerr << std::endl;
diff --git a/libsycl/src/handler.cpp b/libsycl/src/handler.cpp
index 72f05f51ca661..b5def894a6e73 100644
--- a/libsycl/src/handler.cpp
+++ b/libsycl/src/handler.cpp
@@ -6,11 +6,17 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include <sycl/__impl/handler.hpp>
+
 #include <detail/context_impl.hpp>
 #include <detail/handler_impl.hpp>
 #include <detail/offload/offload_utils.hpp>
 #include <detail/queue_impl.hpp>
-#include <sycl/__impl/handler.hpp>
+
+#include <cstring>
+#include <functional>
+#include <memory>
+#include <utility>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
@@ -26,7 +32,7 @@ static void checkCommandGroupFunction(
 }
 
 void handler::submitKernelImpl(detail::DeviceKernelInfo &KernelInfo,
-                               void *ArgData, size_t ArgSize) {
+                               void *ArgData, std::size_t ArgSize) {
   checkCommandGroupFunction(MImpl.MCGF, MImpl.MQueue.getContext());
   MImpl.MArgData.resize(ArgSize);
   std::memcpy(MImpl.MArgData.data(), ArgData, ArgSize);
@@ -40,7 +46,7 @@ void handler::submitKernelImpl(detail::DeviceKernelInfo &KernelInfo,
 }
 
 void handler::setKernelRange(const detail::UnifiedRangeView &Range) {
-  MImpl.MRange = convertToOlRange(Range);
+  MImpl.MRange = detail::convertToOlRange(Range);
 }
 
 void handler::memcpy(void *dest, const void *src, std::size_t numBytes) {
diff --git a/libsycl/src/platform.cpp b/libsycl/src/platform.cpp
index b5bddc82e0d9a..ffef0152e4682 100644
--- a/libsycl/src/platform.cpp
+++ b/libsycl/src/platform.cpp
@@ -13,6 +13,8 @@
 #include <detail/device_impl.hpp>
 #include <detail/platform_impl.hpp>
 
+#include <cassert>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 backend platform::get_backend() const noexcept { return impl->getBackend(); }
@@ -21,16 +23,14 @@ std::vector<platform> platform::get_platforms() {
   auto &PlatformImpls = detail::PlatformImpl::getPlatforms();
   std::vector<platform> Platforms;
   Platforms.reserve(PlatformImpls.size());
-  for (auto &PlatformImpl : PlatformImpls) {
-    Platforms.emplace_back(
-        detail::createSyclObjFromImpl<platform>(*PlatformImpl.get()));
-  }
+  for (const auto &Impl : PlatformImpls)
+    Platforms.emplace_back(detail::createSyclObjFromImpl<platform>(*Impl));
   return Platforms;
 }
 
-std::vector<device> platform::get_devices(info::device_type DeviceType) const {
+std::vector<device> platform::get_devices(info::device_type type) const {
   std::vector<device> Devices;
-  impl->iterateDevices(DeviceType, [&Devices](detail::DeviceImpl *DevImpl) {
+  impl->iterateDevices(type, [&Devices](detail::DeviceImpl *DevImpl) {
     assert(DevImpl && "Device impl can't be nullptr");
     Devices.push_back(detail::createSyclObjFromImpl<device>(*DevImpl));
   });
@@ -38,7 +38,7 @@ std::vector<device> platform::get_devices(info::device_type DeviceType) const {
   return Devices;
 }
 
-bool platform::has(aspect Aspect) const { return impl->has(Aspect); }
+bool platform::has(aspect asp) const { return impl->has(asp); }
 
 template <typename Param>
 detail::is_platform_info_desc_t<Param> platform::get_info() const {
diff --git a/libsycl/src/queue.cpp b/libsycl/src/queue.cpp
index 468698eb06712..99edb2fdb2ec6 100644
--- a/libsycl/src/queue.cpp
+++ b/libsycl/src/queue.cpp
@@ -13,6 +13,8 @@
 #include <detail/device_impl.hpp>
 #include <detail/queue_impl.hpp>
 
+#include <cassert>
+
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 queue::queue(const context &syclContext, const device &syclDevice,
@@ -25,8 +27,7 @@ queue::queue(const context &syclContext, const device &syclDevice,
 queue::queue(const context &syclContext, const device &syclDevice,
              const property_list &propList)
     : queue(syclContext, syclDevice,
-            detail::getSyclObjImpl(syclContext)->get_async_handler(),
-            propList) {}
+            detail::getSyclObjImpl(syclContext)->getAsyncHandler(), propList) {}
 
 backend queue::get_backend() const noexcept { return impl->getBackend(); }
 
@@ -48,18 +49,18 @@ void queue::throw_asynchronous() { impl->throwAsynchronous(); }
 
 event queue::memcpy(void *dest, const void *src, std::size_t numBytes,
                     const std::vector<event> &depEvents) {
-  std::shared_ptr<detail::EventImpl> EventImplPtr =
+  detail::EventImplPtr Event =
       impl->memcpy(dest, src, numBytes, detail::getSyclObjImpls(depEvents));
-  assert(EventImplPtr);
-  return detail::createSyclObjFromImpl<event>(EventImplPtr);
+  assert(Event && "Queue operation must produce an event");
+  return detail::createSyclObjFromImpl<event>(Event);
 }
 
 event queue::prefetch(void *ptr, std::size_t numBytes,
                       const std::vector<event> &depEvents) {
-  std::shared_ptr<detail::EventImpl> EventImplPtr =
+  detail::EventImplPtr Event =
       impl->prefetch(ptr, numBytes, detail::getSyclObjImpls(depEvents));
-  assert(EventImplPtr);
-  return detail::createSyclObjFromImpl<event>(EventImplPtr);
+  assert(Event && "Queue operation must produce an event");
+  return detail::createSyclObjFromImpl<event>(Event);
 }
 
 event queue::getLastEvent() {
@@ -72,7 +73,7 @@ void queue::setKernelLaunchParams(const std::vector<event> &Events,
 }
 
 void queue::submitKernelImpl(detail::DeviceKernelInfo &KernelInfo,
-                             void *ArgData, size_t ArgSize) {
+                             void *ArgData, std::size_t ArgSize) {
   impl->submitKernelImpl(KernelInfo, ArgData, ArgSize);
 }
 
@@ -84,7 +85,7 @@ event queue::fillImpl(void *Ptr, const void *Pattern, std::size_t PatternSize,
   return detail::createSyclObjFromImpl<event>(EventImplPtr);
 }
 
-event queue::submitWithHandler(const TypelessCGF &CGF) {
+event queue::submitWithHandler(const detail::TypelessCGF &CGF) {
   return detail::createSyclObjFromImpl<event>(impl->submitWithHandler(CGF));
 }
 
diff --git a/libsycl/src/usm_functions.cpp b/libsycl/src/usm_functions.cpp
index f6278bd43df71..c643e998196bf 100644
--- a/libsycl/src/usm_functions.cpp
+++ b/libsycl/src/usm_functions.cpp
@@ -20,14 +20,14 @@ _LIBSYCL_BEGIN_NAMESPACE_SYCL
 
 // SYCL 2020 4.8.3.2. Device allocation functions.
 
-void *aligned_alloc_device(size_t alignment, size_t numBytes,
+void *aligned_alloc_device(std::size_t alignment, std::size_t numBytes,
                            const device &syclDevice, const context &syclContext,
                            const property_list &propList) {
   return aligned_alloc(alignment, numBytes, syclDevice, syclContext,
                        usm::alloc::device, propList);
 }
 
-void *aligned_alloc_device(size_t alignment, size_t numBytes,
+void *aligned_alloc_device(std::size_t alignment, std::size_t numBytes,
                            const queue &syclQueue,
                            const property_list &propList) {
   return aligned_alloc_device(alignment, numBytes, syclQueue.get_device(),
@@ -56,22 +56,22 @@ static device getHostAllocDevice(const context &syclContext) {
       [](const device &Dev) { return Dev.has(aspect::usm_host_allocations); });
 
   if (It == ContextDevices.end()) {
-    throw sycl::exception(
-        syclContext, sycl::errc::feature_not_supported,
+    throw exception(
+        syclContext, make_error_code(errc::feature_not_supported),
         "None of the context's devices support host USM allocations.");
   }
   return *It;
 }
 
-void *aligned_alloc_host(size_t alignment, size_t numBytes,
+void *aligned_alloc_host(std::size_t alignment, std::size_t numBytes,
                          const context &syclContext,
                          const property_list &propList) {
-  auto device = getHostAllocDevice(syclContext);
-  return aligned_alloc(alignment, numBytes, device, syclContext,
+  device Device = getHostAllocDevice(syclContext);
+  return aligned_alloc(alignment, numBytes, Device, syclContext,
                        usm::alloc::host, propList);
 }
 
-void *aligned_alloc_host(size_t alignment, size_t numBytes,
+void *aligned_alloc_host(std::size_t alignment, std::size_t numBytes,
                          const queue &syclQueue,
                          const property_list &propList) {
   return aligned_alloc_host(alignment, numBytes, syclQueue.get_context(),
@@ -90,14 +90,14 @@ void *malloc_host(std::size_t numBytes, const queue &syclQueue,
 
 // SYCL 2020 4.8.3.4. Shared allocation functions.
 
-void *aligned_alloc_shared(size_t alignment, size_t numBytes,
+void *aligned_alloc_shared(std::size_t alignment, std::size_t numBytes,
                            const device &syclDevice, const context &syclContext,
                            const property_list &propList) {
   return aligned_alloc(alignment, numBytes, syclDevice, syclContext,
                        usm::alloc::shared, propList);
 }
 
-void *aligned_alloc_shared(size_t alignment, size_t numBytes,
+void *aligned_alloc_shared(std::size_t alignment, std::size_t numBytes,
                            const queue &syclQueue,
                            const property_list &propList) {
   return aligned_alloc_shared(alignment, numBytes, syclQueue.get_device(),
@@ -118,9 +118,9 @@ void *malloc_shared(std::size_t numBytes, const queue &syclQueue,
 
 // SYCL 2020 4.8.3.5. Parameterized allocation functions.
 
-static aspect getAspectByAllocationKind(usm::alloc kind,
+static aspect getAspectByAllocationKind(usm::alloc Kind,
                                         const context &syclContext) {
-  switch (kind) {
+  switch (Kind) {
   case usm::alloc::host:
     return aspect::usm_host_allocations;
   case usm::alloc::device:
@@ -137,18 +137,18 @@ static aspect getAspectByAllocationKind(usm::alloc kind,
 
 void *aligned_alloc(std::size_t alignment, std::size_t numBytes,
                     const device &syclDevice, const context &syclContext,
-                    usm::alloc kind, const property_list &propList) {
+                    usm::alloc kind, const property_list & /*propList*/) {
 
   auto ContextDevices = syclContext.get_devices();
-  if (std::none_of(ContextDevices.begin(), ContextDevices.end(),
-                   [&syclDevice](device Dev) { return Dev == syclDevice; }))
+  if (std::none_of(
+          ContextDevices.begin(), ContextDevices.end(),
+          [&syclDevice](const device &Dev) { return Dev == syclDevice; }))
     throw exception(syclContext, make_error_code(errc::invalid),
                     "Specified device is not contained by specified context.");
 
   if (!syclDevice.has(getAspectByAllocationKind(kind, syclContext)))
-    throw sycl::exception(
-        syclContext, sycl::errc::feature_not_supported,
-        "Device doesn't support requested kind of USM allocation");
+    throw exception(syclContext, make_error_code(errc::feature_not_supported),
+                    "Device doesn't support requested kind of USM allocation");
 
   if (!numBytes)
     return nullptr;
diff --git a/libsycl/test/basic/context.cpp b/libsycl/test/basic/context.cpp
index 59e8f3d216948..90e08d95b8b9e 100644
--- a/libsycl/test/basic/context.cpp
+++ b/libsycl/test/basic/context.cpp
@@ -2,55 +2,56 @@
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: %t.out
 
+#include <cstdlib>
 #include <iostream>
 
 #include <sycl/sycl.hpp>
 
 using namespace sycl;
 
-void return_fail() {
+void returnFail() {
   std::cout << "Failed" << std::endl;
   exit(1);
 }
 
 void dummyAsyncHandler(sycl::exception_list) {}
 
-void check(const context &ctx) {
-  auto devices = ctx.get_devices();
+void check(const context &Ctx) {
+  auto Devices = Ctx.get_devices();
 
-  auto plt = ctx.get_platform();
-  for (const auto &dev : devices) {
-    if (dev.get_platform() != plt) {
+  auto Plt = Ctx.get_platform();
+  for (const auto &Dev : Devices) {
+    if (Dev.get_platform() != Plt) {
       std::cout << "Device platform does not match context platform"
                 << std::endl;
-      return_fail();
+      returnFail();
     }
   }
-  auto backend = ctx.get_backend();
-  for (const auto &dev : devices) {
-    if (dev.get_backend() != backend) {
+  auto Backend = Ctx.get_backend();
+  for (const auto &Dev : Devices) {
+    if (Dev.get_backend() != Backend) {
       std::cout << "Device backend does not match context backend" << std::endl;
-      return_fail();
+      returnFail();
     }
   }
 }
 
 int main() {
-  context ctx;
-  check(ctx);
+  context Ctx;
+  check(Ctx);
 
-  device dev;
-  context ctx2(dev);
-  check(ctx2);
+  device Dev;
+  context Ctx2(Dev);
+  check(Ctx2);
 
-  device dev2;
+  device Dev2;
 
-  platform plt = dev.get_platform();
-  context ctx3(plt);
-  check(ctx3);
+  platform Plt = Dev.get_platform();
+  context Ctx3(Plt);
+  check(Ctx3);
 
-  context ctx4({dev, dev2}, dummyAsyncHandler, {});
-  check(ctx4);
+  context Ctx4({Dev, Dev2}, dummyAsyncHandler, {});
+  check(Ctx4);
 
   std::cout << "Passed" << std::endl;
   return 0;
diff --git a/libsycl/test/basic/get_backend.cpp b/libsycl/test/basic/get_backend.cpp
index e54ef2d8c1a7b..1720d9d3e80bd 100644
--- a/libsycl/test/basic/get_backend.cpp
+++ b/libsycl/test/basic/get_backend.cpp
@@ -2,6 +2,7 @@
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: %t.out
 
+#include <cstdlib>
 #include <iostream>
 
 #include <sycl/sycl.hpp>
@@ -10,8 +11,8 @@ using namespace sycl;
 
 class Kernel1;
 
-bool check(backend be) {
-  switch (be) {
+bool check(backend Backend) {
+  switch (Backend) {
   case backend::opencl:
   case backend::level_zero:
   case backend::cuda:
@@ -22,30 +23,30 @@ bool check(backend be) {
   }
 }
 
-void return_fail() {
+void returnFail() {
   std::cout << "Failed" << std::endl;
   exit(1);
 }
 
 int main() {
-  for (const auto &plt : platform::get_platforms()) {
-    if (!check(plt.get_backend())) {
-      return_fail();
+  for (const auto &Plt : platform::get_platforms()) {
+    if (!check(Plt.get_backend())) {
+      returnFail();
     }
 
-    auto device = plt.get_devices()[0];
-    if (device.get_backend() != plt.get_backend()) {
-      return_fail();
+    auto Dev = Plt.get_devices()[0];
+    if (Dev.get_backend() != Plt.get_backend()) {
+      returnFail();
     }
 
-    queue q(device);
-    if (q.get_backend() != plt.get_backend()) {
-      return_fail();
+    queue Q(Dev);
+    if (Q.get_backend() != Plt.get_backend()) {
+      returnFail();
     }
 
-    event e = q.single_task<Kernel1>([]() {});
-    if (e.get_backend() != plt.get_backend()) {
-      return_fail();
+    event E = Q.single_task<Kernel1>([]() {});
+    if (E.get_backend() != Plt.get_backend()) {
+      returnFail();
     }
   }
   std::cout << "Passed" << std::endl;
diff --git a/libsycl/test/basic/group.cpp b/libsycl/test/basic/group.cpp
index cfc3870b5cf99..e29d4e91cd095 100644
--- a/libsycl/test/basic/group.cpp
+++ b/libsycl/test/basic/group.cpp
@@ -25,7 +25,7 @@ int main() {
   initialize(GroupRangeData, DataLen * Dims, static_cast<size_t>(0));
   initialize(GroupLinearIdData, DataLen * Dims, static_cast<size_t>(0));
 
-  Q.parallel_for<class group_get_group_range_regression>(
+  Q.parallel_for<class GroupGetGroupRangeRegression>(
       sycl::nd_range<3>{GlobalRange, LocalRange}, [=](sycl::nd_item<3> It) {
         const size_t Off = It.get_global_linear_id() * Dims;
         const auto GR = It.get_group().get_group_range();
@@ -34,7 +34,7 @@ int main() {
         GroupRangeData[Off + 2] = GR[2];
       });
 
-  Q.parallel_for<class group_get_group_linear_id_regression>(
+  Q.parallel_for<class GroupGetGroupLinearIdRegression>(
       sycl::nd_range<3>{GlobalRange, LocalRange}, [=](sycl::nd_item<3> It) {
         const size_t Off = It.get_global_linear_id() * Dims;
         const size_t LI = It.get_group().get_group_linear_id();
diff --git a/libsycl/test/basic/group_barrier.cpp b/libsycl/test/basic/group_barrier.cpp
index f06c73566067c..d95bfdaa72636 100644
--- a/libsycl/test/basic/group_barrier.cpp
+++ b/libsycl/test/basic/group_barrier.cpp
@@ -20,7 +20,7 @@ static bool runBarrierCase(sycl::queue &Q, int Iteration) {
   int *Data = sycl::malloc_shared<int>(GlobalSize, Q);
   int *LocalData = sycl::malloc_shared<int>(GlobalSize, Q);
 
-  Q.parallel_for<class barrier_kernel>(
+  Q.parallel_for<class BarrierKernel>(
       sycl::nd_range<1>{GlobalSize, LocalSize}, [=](sycl::nd_item<1> It) {
         const int Lid = It.get_local_id(0);
         const int Gid = It.get_group().get_group_id(0);
diff --git a/libsycl/test/basic/group_barrier_device_code.cpp b/libsycl/test/basic/group_barrier_device_code.cpp
index 4387c77c01373..972e0ed00df77 100644
--- a/libsycl/test/basic/group_barrier_device_code.cpp
+++ b/libsycl/test/basic/group_barrier_device_code.cpp
@@ -6,33 +6,33 @@
 #include <sycl/sycl.hpp>
 
 void test(sycl::queue Q) {
-  Q.parallel_for<class barrier_kernel>(
+  Q.parallel_for<class BarrierKernel>(
       sycl::nd_range<1>{8, 4}, [=](sycl::nd_item<1> It) {
         // Execution scope is Workgroup (2), memory scope defaults to the
         // group's fence_scope, i.e. Workgroup (2).
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 2, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 2, i32 noundef 400)
         sycl::group_barrier(It.get_group());
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 4, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 4, i32 noundef 400)
         sycl::group_barrier(It.get_group(), sycl::memory_scope::work_item);
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 3, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 3, i32 noundef 400)
         sycl::group_barrier(It.get_group(), sycl::memory_scope::sub_group);
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 2, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 2, i32 noundef 400)
         sycl::group_barrier(It.get_group(), sycl::memory_scope::work_group);
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 1, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 1, i32 noundef 400)
         sycl::group_barrier(It.get_group(), sycl::memory_scope::device);
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 2, i32 noundef 0, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 2, i32 noundef 0, i32 noundef 400)
         sycl::group_barrier(It.get_group(), sycl::memory_scope::system);
 
         // Execution scope is Subgroup (3), memory scope defaults to the
         // sub-group's fence_scope, i.e. Subgroup (3).
-        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(i32 noundef
-        // 3, i32 noundef 3, i32 noundef 400)
+        // CHECK: call spir_func void @_Z22__spirv_ControlBarrierjjj(
+        // CHECK-SAME: i32 noundef 3, i32 noundef 3, i32 noundef 400)
         sycl::group_barrier(It.get_sub_group());
       });
 }
diff --git a/libsycl/test/basic/group_local_id.cpp b/libsycl/test/basic/group_local_id.cpp
index 499a45f55a91a..b788a10e2a0d3 100644
--- a/libsycl/test/basic/group_local_id.cpp
+++ b/libsycl/test/basic/group_local_id.cpp
@@ -6,7 +6,7 @@
 
 #include <cassert>
 
-template <int Dims> class group_local_id_kernel;
+template <int Dims> class GroupLocalIdKernel;
 
 template <int Dims>
 bool runGroupLocalIdCase(sycl::queue &Q, sycl::nd_range<Dims> ExecRange,
@@ -15,7 +15,7 @@ bool runGroupLocalIdCase(sycl::queue &Q, sycl::nd_range<Dims> ExecRange,
   for (size_t I = 0; I < Count; ++I)
     Out[I] = -1;
 
-  Q.parallel_for<group_local_id_kernel<Dims>>(
+  Q.parallel_for<GroupLocalIdKernel<Dims>>(
       ExecRange, [=](sycl::nd_item<Dims> Item) {
         Out[Item.get_global_linear_id()] =
             (Item.get_local_id() == Item.get_group().get_local_id());
diff --git a/libsycl/test/basic/handler/handler_parallel_for_generic_lambda.cpp b/libsycl/test/basic/handler/handler_parallel_for_generic_lambda.cpp
index da34fab3b6741..cde51baab70fb 100644
--- a/libsycl/test/basic/handler/handler_parallel_for_generic_lambda.cpp
+++ b/libsycl/test/basic/handler/handler_parallel_for_generic_lambda.cpp
@@ -6,36 +6,36 @@
 #include <type_traits>
 
 template <typename KernelName, typename ExpectedType, typename Range>
-void test_parallel_for(Range r) {
-  sycl::queue q;
-  q.submit([&](sycl::handler &cgh) {
-    cgh.parallel_for<KernelName>(r, [=](auto item) {
-      static_assert(std::is_same<decltype(item), ExpectedType>::value,
+void testParallelFor(Range R) {
+  sycl::queue Q;
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.parallel_for<KernelName>(R, [=](auto Item) {
+      static_assert(std::is_same<decltype(Item), ExpectedType>::value,
                     "Argument type is unexpected");
     });
   });
 }
 
 int main() {
-  test_parallel_for<class Item1Name, sycl::item<1>>(sycl::range<1>{1});
-  test_parallel_for<class Item2Name, sycl::item<2>>(sycl::range<2>{1, 1});
-  test_parallel_for<class Item3Name, sycl::item<3>>(sycl::range<3>{1, 1, 1});
-  test_parallel_for<class NDItem1Name, sycl::nd_item<1>>(
+  testParallelFor<class Item1Name, sycl::item<1>>(sycl::range<1>{1});
+  testParallelFor<class Item2Name, sycl::item<2>>(sycl::range<2>{1, 1});
+  testParallelFor<class Item3Name, sycl::item<3>>(sycl::range<3>{1, 1, 1});
+  testParallelFor<class NDItem1Name, sycl::nd_item<1>>(
       sycl::nd_range<1>{sycl::range<1>{1}, sycl::range<1>{1}});
-  test_parallel_for<class NDItem2Name, sycl::nd_item<2>>(
+  testParallelFor<class NDItem2Name, sycl::nd_item<2>>(
       sycl::nd_range<2>{sycl::range<2>{2, 2}, sycl::range<2>{1, 1}});
-  test_parallel_for<class NDItem3Name, sycl::nd_item<3>>(
+  testParallelFor<class NDItem3Name, sycl::nd_item<3>>(
       sycl::nd_range<3>{sycl::range<3>{2, 2, 2}, sycl::range<3>{1, 1, 1}});
 
-  sycl::queue q;
-  q.submit([&](sycl::handler &cgh) {
-    cgh.parallel_for<class GenericInitList1>(sycl::range{1}, [=](auto &) {});
+  sycl::queue Q;
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.parallel_for<class GenericInitList1>(sycl::range{1}, [=](auto &) {});
   });
-  q.submit([&](sycl::handler &cgh) {
-    cgh.parallel_for<class GenericInitList2>(sycl::range{1, 1}, [=](auto &) {});
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.parallel_for<class GenericInitList2>(sycl::range{1, 1}, [=](auto &) {});
   });
-  q.submit([&](sycl::handler &cgh) {
-    cgh.parallel_for<class GenericInitList3>(sycl::range{1, 1, 1},
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.parallel_for<class GenericInitList3>(sycl::range{1, 1, 1},
                                              [=](auto &) {});
   });
 
diff --git a/libsycl/test/basic/handler/handler_parallel_for_nd_range_invalid_arg_type.cpp b/libsycl/test/basic/handler/handler_parallel_for_nd_range_invalid_arg_type.cpp
index 01be9bcd94a92..1d0aeb129e4c5 100644
--- a/libsycl/test/basic/handler/handler_parallel_for_nd_range_invalid_arg_type.cpp
+++ b/libsycl/test/basic/handler/handler_parallel_for_nd_range_invalid_arg_type.cpp
@@ -4,10 +4,10 @@
 #include <sycl/sycl.hpp>
 
 int main() {
-  sycl::queue q;
+  sycl::queue Q;
 
-  q.submit([&](sycl::handler &cgh) {
-    cgh.parallel_for<class HandlerNDRangeInvalidArgType>(
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.parallel_for<class HandlerNDRangeInvalidArgType>(
         sycl::nd_range<1>{sycl::range<1>{4}, sycl::range<1>{2}},
         [=](sycl::item<1>) {}); // expected-error@* {{must be sycl::nd_item or
                                 // be convertible from sycl::nd_item}}
diff --git a/libsycl/test/basic/handler/handler_parallel_for_runtime.cpp b/libsycl/test/basic/handler/handler_parallel_for_runtime.cpp
index 8f6b31c332d9b..bcfc988e6038e 100644
--- a/libsycl/test/basic/handler/handler_parallel_for_runtime.cpp
+++ b/libsycl/test/basic/handler/handler_parallel_for_runtime.cpp
@@ -6,144 +6,144 @@
 
 #include <cassert>
 
-void test1D(sycl::queue &q) {
+void test1D(sycl::queue &Q) {
   constexpr size_t N = 16;
   constexpr size_t LocalSize = 4;
-  int *data = sycl::malloc_shared<int>(N, q);
-  assert(data);
+  int *Data = sycl::malloc_shared<int>(N, Q);
+  assert(Data);
 
-  for (size_t i = 0; i < N; ++i)
-    data[i] = 0;
+  for (size_t I = 0; I < N; ++I)
+    Data[I] = 0;
 
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerParallelForRuntime>(
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerParallelForRuntime>(
          sycl::range<1>{N},
-         [=](sycl::item<1> it) { data[it[0]] = static_cast<int>(it[0]) + 7; });
+         [=](sycl::item<1> It) { Data[It[0]] = static_cast<int>(It[0]) + 7; });
    }).wait();
 
-  for (size_t i = 0; i < N; ++i)
-    assert(data[i] == static_cast<int>(i) + 7);
+  for (size_t I = 0; I < N; ++I)
+    assert(Data[I] == static_cast<int>(I) + 7);
 
-  for (size_t i = 0; i < N; ++i)
-    data[i] = 0;
+  for (size_t I = 0; I < N; ++I)
+    Data[I] = 0;
 
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerParallelForNDRangeRuntime>(
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerParallelForNDRangeRuntime>(
          sycl::nd_range<1>{sycl::range<1>{N}, sycl::range<1>{LocalSize}},
-         [=](sycl::nd_item<1> it) {
-           const size_t idx = it.get_global_id(0);
-           data[idx] = static_cast<int>(idx) + 11;
+         [=](sycl::nd_item<1> It) {
+           const size_t Idx = It.get_global_id(0);
+           Data[Idx] = static_cast<int>(Idx) + 11;
          });
    }).wait();
 
-  for (size_t i = 0; i < N; ++i)
-    assert(data[i] == static_cast<int>(i) + 11);
+  for (size_t I = 0; I < N; ++I)
+    assert(Data[I] == static_cast<int>(I) + 11);
 
-  sycl::free(data, q);
+  sycl::free(Data, Q);
 }
 
-void test2D(sycl::queue &q) {
+void test2D(sycl::queue &Q) {
   constexpr size_t G0 = 4;
   constexpr size_t G1 = 6;
   constexpr size_t L0 = 2;
   constexpr size_t L1 = 3;
-  int *data = sycl::malloc_shared<int>(G0 * G1, q);
-  assert(data);
-
-  for (size_t i = 0; i < G0 * G1; ++i)
-    data[i] = -1;
-
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerParallelFor2DRuntime>(
-         sycl::range<2>{G0, G1}, [=](sycl::item<2> it) {
-           const size_t i = it.get_id(0);
-           const size_t j = it.get_id(1);
-           data[i * G1 + j] = static_cast<int>(i * 100 + j) + 7;
+  int *Data = sycl::malloc_shared<int>(G0 * G1, Q);
+  assert(Data);
+
+  for (size_t I = 0; I < G0 * G1; ++I)
+    Data[I] = -1;
+
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerParallelFor2DRuntime>(
+         sycl::range<2>{G0, G1}, [=](sycl::item<2> It) {
+           const size_t I = It.get_id(0);
+           const size_t J = It.get_id(1);
+           Data[I * G1 + J] = static_cast<int>(I * 100 + J) + 7;
          });
    }).wait();
 
-  for (size_t i = 0; i < G0; ++i)
-    for (size_t j = 0; j < G1; ++j)
-      assert(data[i * G1 + j] == static_cast<int>(i * 100 + j) + 7);
+  for (size_t I = 0; I < G0; ++I)
+    for (size_t J = 0; J < G1; ++J)
+      assert(Data[I * G1 + J] == static_cast<int>(I * 100 + J) + 7);
 
-  for (size_t i = 0; i < G0 * G1; ++i)
-    data[i] = -1;
+  for (size_t I = 0; I < G0 * G1; ++I)
+    Data[I] = -1;
 
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerNDRange2DRuntime>(
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerNDRange2DRuntime>(
          sycl::nd_range<2>{sycl::range<2>{G0, G1}, sycl::range<2>{L0, L1}},
-         [=](sycl::nd_item<2> it) {
-           const size_t i = it.get_global_id(0);
-           const size_t j = it.get_global_id(1);
-           data[i * G1 + j] = static_cast<int>(i * 100 + j);
+         [=](sycl::nd_item<2> It) {
+           const size_t I = It.get_global_id(0);
+           const size_t J = It.get_global_id(1);
+           Data[I * G1 + J] = static_cast<int>(I * 100 + J);
          });
    }).wait();
 
-  for (size_t i = 0; i < G0; ++i)
-    for (size_t j = 0; j < G1; ++j)
-      assert(data[i * G1 + j] == static_cast<int>(i * 100 + j));
+  for (size_t I = 0; I < G0; ++I)
+    for (size_t J = 0; J < G1; ++J)
+      assert(Data[I * G1 + J] == static_cast<int>(I * 100 + J));
 
-  sycl::free(data, q);
+  sycl::free(Data, Q);
 }
 
-void test3D(sycl::queue &q) {
+void test3D(sycl::queue &Q) {
   constexpr size_t G0 = 2;
   constexpr size_t G1 = 3;
   constexpr size_t G2 = 4;
   constexpr size_t L0 = 1;
   constexpr size_t L1 = 3;
   constexpr size_t L2 = 2;
-  int *data = sycl::malloc_shared<int>(G0 * G1 * G2, q);
-  assert(data);
-
-  for (size_t i = 0; i < G0 * G1 * G2; ++i)
-    data[i] = -1;
-
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerParallelFor3DRuntime>(
-         sycl::range<3>{G0, G1, G2}, [=](sycl::item<3> it) {
-           const size_t i = it.get_id(0);
-           const size_t j = it.get_id(1);
-           const size_t k = it.get_id(2);
-           data[(i * G1 + j) * G2 + k] =
-               static_cast<int>(i * 100 + j * 10 + k) + 7;
+  int *Data = sycl::malloc_shared<int>(G0 * G1 * G2, Q);
+  assert(Data);
+
+  for (size_t I = 0; I < G0 * G1 * G2; ++I)
+    Data[I] = -1;
+
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerParallelFor3DRuntime>(
+         sycl::range<3>{G0, G1, G2}, [=](sycl::item<3> It) {
+           const size_t I = It.get_id(0);
+           const size_t J = It.get_id(1);
+           const size_t K = It.get_id(2);
+           Data[(I * G1 + J) * G2 + K] =
+               static_cast<int>(I * 100 + J * 10 + K) + 7;
          });
    }).wait();
 
-  for (size_t i = 0; i < G0; ++i)
-    for (size_t j = 0; j < G1; ++j)
-      for (size_t k = 0; k < G2; ++k)
-        assert(data[(i * G1 + j) * G2 + k] ==
-               static_cast<int>(i * 100 + j * 10 + k) + 7);
+  for (size_t I = 0; I < G0; ++I)
+    for (size_t J = 0; J < G1; ++J)
+      for (size_t K = 0; K < G2; ++K)
+        assert(Data[(I * G1 + J) * G2 + K] ==
+               static_cast<int>(I * 100 + J * 10 + K) + 7);
 
-  for (size_t i = 0; i < G0 * G1 * G2; ++i)
-    data[i] = -1;
+  for (size_t I = 0; I < G0 * G1 * G2; ++I)
+    Data[I] = -1;
 
-  q.submit([&](sycl::handler &cgh) {
-     cgh.parallel_for<class HandlerNDRange3DRuntime>(
+  Q.submit([&](sycl::handler &CGH) {
+     CGH.parallel_for<class HandlerNDRange3DRuntime>(
          sycl::nd_range<3>{sycl::range<3>{G0, G1, G2},
                            sycl::range<3>{L0, L1, L2}},
-         [=](sycl::nd_item<3> it) {
-           const size_t i = it.get_global_id(0);
-           const size_t j = it.get_global_id(1);
-           const size_t k = it.get_global_id(2);
-           data[(i * G1 + j) * G2 + k] = static_cast<int>(i * 100 + j * 10 + k);
+         [=](sycl::nd_item<3> It) {
+           const size_t I = It.get_global_id(0);
+           const size_t J = It.get_global_id(1);
+           const size_t K = It.get_global_id(2);
+           Data[(I * G1 + J) * G2 + K] = static_cast<int>(I * 100 + J * 10 + K);
          });
    }).wait();
 
-  for (size_t i = 0; i < G0; ++i)
-    for (size_t j = 0; j < G1; ++j)
-      for (size_t k = 0; k < G2; ++k)
-        assert(data[(i * G1 + j) * G2 + k] ==
-               static_cast<int>(i * 100 + j * 10 + k));
+  for (size_t I = 0; I < G0; ++I)
+    for (size_t J = 0; J < G1; ++J)
+      for (size_t K = 0; K < G2; ++K)
+        assert(Data[(I * G1 + J) * G2 + K] ==
+               static_cast<int>(I * 100 + J * 10 + K));
 
-  sycl::free(data, q);
+  sycl::free(Data, Q);
 }
 
 int main() {
-  sycl::queue q;
-  test1D(q);
-  test2D(q);
-  test3D(q);
+  sycl::queue Q;
+  test1D(Q);
+  test2D(Q);
+  test3D(Q);
   return 0;
 }
diff --git a/libsycl/test/basic/handler/handler_unnamed_lambda_functor.cpp b/libsycl/test/basic/handler/handler_single_task_named_functor.cpp
similarity index 52%
rename from libsycl/test/basic/handler/handler_unnamed_lambda_functor.cpp
rename to libsycl/test/basic/handler/handler_single_task_named_functor.cpp
index ae9c0790f9a99..0386a530766be 100644
--- a/libsycl/test/basic/handler/handler_unnamed_lambda_functor.cpp
+++ b/libsycl/test/basic/handler/handler_single_task_named_functor.cpp
@@ -7,12 +7,12 @@ struct SingleTaskKernel {
 };
 
 int main() {
-  sycl::queue q;
+  sycl::queue Q;
 
-  q.single_task<class QueueSingleTaskNamed>(SingleTaskKernel{});
+  Q.single_task<class QueueSingleTaskNamed>(SingleTaskKernel{});
 
-  q.submit([&](sycl::handler &cgh) {
-    cgh.single_task<class HandlerSingleTaskNamed>(SingleTaskKernel{});
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.single_task<class HandlerSingleTaskNamed>(SingleTaskKernel{});
   });
 
   return 0;
diff --git a/libsycl/test/basic/handler/submit_fn_ptr_handler.cpp b/libsycl/test/basic/handler/submit_fn_ptr_handler.cpp
index c43a5deef4830..cf1839d961781 100644
--- a/libsycl/test/basic/handler/submit_fn_ptr_handler.cpp
+++ b/libsycl/test/basic/handler/submit_fn_ptr_handler.cpp
@@ -6,19 +6,19 @@
 
 #include <cassert>
 
-int *p = nullptr;
+int *Ptr = nullptr;
 
-void foo(sycl::handler &cgh) {
-  auto *copy = p;
-  cgh.single_task([=]() { *copy = 42; });
+void foo(sycl::handler &CGH) {
+  auto *Copy = Ptr;
+  CGH.single_task([=]() { *Copy = 42; });
 }
 
 int main() {
-  sycl::queue q;
-  p = sycl::malloc_shared<int>(1, q);
-  *p = 0;
-  q.submit(foo).wait();
-  assert(*p == 42);
-  sycl::free(p, q);
+  sycl::queue Q;
+  Ptr = sycl::malloc_shared<int>(1, Q);
+  *Ptr = 0;
+  Q.submit(foo).wait();
+  assert(*Ptr == 42);
+  sycl::free(Ptr, Q);
   return 0;
 }
diff --git a/libsycl/test/basic/index_space_classes.cpp b/libsycl/test/basic/index_space_classes.cpp
index 1afb70e634303..b810c53149bfc 100644
--- a/libsycl/test/basic/index_space_classes.cpp
+++ b/libsycl/test/basic/index_space_classes.cpp
@@ -5,22 +5,24 @@
 // Unified test for sycl::range and sycl::id covering all operators defined in
 // theirs base class, plus class-specific behaviour for each type.
 
-#include <cassert>
 #include <sycl/sycl.hpp>
+
+#include <cassert>
 #include <type_traits>
+#include <utility>
 
 using sycl::detail::Builder;
 
 // Helper to create values for any dimension from three components.
 // Only uses the required number of values based on dimension.
 template <template <int> class T, int Dim>
-T<Dim> makeValue(std::size_t a, std::size_t b = 0, std::size_t c = 0) {
+T<Dim> makeValue(std::size_t A, std::size_t B = 0, std::size_t C = 0) {
   if constexpr (Dim == 1)
-    return T<1>(a);
+    return T<1>(A);
   else if constexpr (Dim == 2)
-    return T<2>(a, b);
+    return T<2>(A, B);
   else
-    return T<3>(a, b, c);
+    return T<3>(A, B, C);
 }
 
 // Tests binary and compound operators for a specific dimension.
diff --git a/libsycl/test/basic/khr_get_default_context.cpp b/libsycl/test/basic/khr_get_default_context.cpp
index 79f52f2421518..54912e96747c4 100644
--- a/libsycl/test/basic/khr_get_default_context.cpp
+++ b/libsycl/test/basic/khr_get_default_context.cpp
@@ -13,11 +13,11 @@ using namespace sycl;
 
 int main() {
   for (const sycl::platform &P : sycl::platform::get_platforms()) {
-    auto ctx_devs = P.khr_get_default_context().get_devices();
-    auto root_devs = P.get_devices();
+    auto CtxDevs = P.khr_get_default_context().get_devices();
+    auto RootDevs = P.get_devices();
 
-    for (const auto &dev : root_devs)
-      if (std::find(ctx_devs.begin(), ctx_devs.end(), dev) == ctx_devs.end())
+    for (const auto &Dev : RootDevs)
+      if (std::find(CtxDevs.begin(), CtxDevs.end(), Dev) == CtxDevs.end())
         return 1;
   }
 
diff --git a/libsycl/test/basic/linear_sub_group.cpp b/libsycl/test/basic/linear_sub_group.cpp
index 4f7e88568cc36..96b774689ade2 100644
--- a/libsycl/test/basic/linear_sub_group.cpp
+++ b/libsycl/test/basic/linear_sub_group.cpp
@@ -5,6 +5,7 @@
 #include <sycl/sycl.hpp>
 
 #include <cassert>
+#include <cstdint>
 
 int main() {
   sycl::queue Q;
@@ -17,7 +18,7 @@ int main() {
   for (uint32_t I = 0; I < Size; ++I)
     Output[I] = -1;
 
-  Q.parallel_for<class linear_sub_group>(
+  Q.parallel_for<class LinearSubGroup>(
       sycl::nd_range<2>(sycl::range<2>(Outer, Inner),
                         sycl::range<2>(Outer, Inner)),
       [=](sycl::nd_item<2> It) {
diff --git a/libsycl/test/basic/nd_range.cpp b/libsycl/test/basic/nd_range.cpp
index 7988e8f3509f8..67e6eb852cc03 100644
--- a/libsycl/test/basic/nd_range.cpp
+++ b/libsycl/test/basic/nd_range.cpp
@@ -7,49 +7,47 @@
 #include <iostream>
 
 int main() {
-  sycl::nd_range<1> one_dim_nd_range_offset({4}, {2}, {1});
-  assert(one_dim_nd_range_offset.get_global_range() == sycl::range<1>(4));
-  assert(one_dim_nd_range_offset.get_local_range() == sycl::range<1>(2));
-  assert(one_dim_nd_range_offset.get_group_range() == sycl::range<1>(2));
-  assert(one_dim_nd_range_offset.get_offset() == sycl::id<1>(1));
+  sycl::nd_range<1> OneDimNdRangeOffset({4}, {2}, {1});
+  assert(OneDimNdRangeOffset.get_global_range() == sycl::range<1>(4));
+  assert(OneDimNdRangeOffset.get_local_range() == sycl::range<1>(2));
+  assert(OneDimNdRangeOffset.get_group_range() == sycl::range<1>(2));
+  assert(OneDimNdRangeOffset.get_offset() == sycl::id<1>(1));
   std::cout << "one_dim_nd_range_offset passed " << std::endl;
 
-  sycl::nd_range<2> two_dim_nd_range_offset({8, 16}, {4, 8}, {1, 1});
-  assert(two_dim_nd_range_offset.get_global_range() == sycl::range<2>(8, 16));
-  assert(two_dim_nd_range_offset.get_local_range() == sycl::range<2>(4, 8));
-  assert(two_dim_nd_range_offset.get_group_range() == sycl::range<2>(2, 2));
-  assert(two_dim_nd_range_offset.get_offset() == sycl::id<2>(1, 1));
+  sycl::nd_range<2> TwoDimNdRangeOffset({8, 16}, {4, 8}, {1, 1});
+  assert(TwoDimNdRangeOffset.get_global_range() == sycl::range<2>(8, 16));
+  assert(TwoDimNdRangeOffset.get_local_range() == sycl::range<2>(4, 8));
+  assert(TwoDimNdRangeOffset.get_group_range() == sycl::range<2>(2, 2));
+  assert(TwoDimNdRangeOffset.get_offset() == sycl::id<2>(1, 1));
   std::cout << "two_dim_nd_range_offset passed " << std::endl;
 
-  sycl::nd_range<3> three_dim_nd_range_offset({32, 64, 128}, {16, 32, 64},
-                                              {1, 1, 1});
-  assert(three_dim_nd_range_offset.get_global_range() ==
+  sycl::nd_range<3> ThreeDimNdRangeOffset({32, 64, 128}, {16, 32, 64},
+                                          {1, 1, 1});
+  assert(ThreeDimNdRangeOffset.get_global_range() ==
          sycl::range<3>(32, 64, 128));
-  assert(three_dim_nd_range_offset.get_local_range() ==
-         sycl::range<3>(16, 32, 64));
-  assert(three_dim_nd_range_offset.get_group_range() ==
-         sycl::range<3>(2, 2, 2));
-  assert(three_dim_nd_range_offset.get_offset() == sycl::id<3>(1, 1, 1));
+  assert(ThreeDimNdRangeOffset.get_local_range() == sycl::range<3>(16, 32, 64));
+  assert(ThreeDimNdRangeOffset.get_group_range() == sycl::range<3>(2, 2, 2));
+  assert(ThreeDimNdRangeOffset.get_offset() == sycl::id<3>(1, 1, 1));
   std::cout << "three_dim_nd_range_offset passed " << std::endl;
 
-  sycl::nd_range<1> one_dim_nd_range({4}, {2});
-  assert(one_dim_nd_range.get_global_range() == sycl::range<1>(4));
-  assert(one_dim_nd_range.get_local_range() == sycl::range<1>(2));
-  assert(one_dim_nd_range.get_group_range() == sycl::range<1>(2));
-  assert(one_dim_nd_range.get_offset() == sycl::id<1>(0));
+  sycl::nd_range<1> OneDimNdRange({4}, {2});
+  assert(OneDimNdRange.get_global_range() == sycl::range<1>(4));
+  assert(OneDimNdRange.get_local_range() == sycl::range<1>(2));
+  assert(OneDimNdRange.get_group_range() == sycl::range<1>(2));
+  assert(OneDimNdRange.get_offset() == sycl::id<1>(0));
   std::cout << "one_dim_nd_range passed " << std::endl;
 
-  sycl::nd_range<2> two_dim_nd_range({8, 16}, {4, 8});
-  assert(two_dim_nd_range.get_global_range() == sycl::range<2>(8, 16));
-  assert(two_dim_nd_range.get_local_range() == sycl::range<2>(4, 8));
-  assert(two_dim_nd_range.get_group_range() == sycl::range<2>(2, 2));
-  assert(two_dim_nd_range.get_offset() == sycl::id<2>(0, 0));
+  sycl::nd_range<2> TwoDimNdRange({8, 16}, {4, 8});
+  assert(TwoDimNdRange.get_global_range() == sycl::range<2>(8, 16));
+  assert(TwoDimNdRange.get_local_range() == sycl::range<2>(4, 8));
+  assert(TwoDimNdRange.get_group_range() == sycl::range<2>(2, 2));
+  assert(TwoDimNdRange.get_offset() == sycl::id<2>(0, 0));
   std::cout << "two_dim_nd_range passed " << std::endl;
 
-  sycl::nd_range<3> three_dim_nd_range({32, 64, 128}, {16, 32, 64});
-  assert(three_dim_nd_range.get_global_range() == sycl::range<3>(32, 64, 128));
-  assert(three_dim_nd_range.get_local_range() == sycl::range<3>(16, 32, 64));
-  assert(three_dim_nd_range.get_group_range() == sycl::range<3>(2, 2, 2));
-  assert(three_dim_nd_range.get_offset() == sycl::id<3>(0, 0, 0));
+  sycl::nd_range<3> ThreeDimNdRange({32, 64, 128}, {16, 32, 64});
+  assert(ThreeDimNdRange.get_global_range() == sycl::range<3>(32, 64, 128));
+  assert(ThreeDimNdRange.get_local_range() == sycl::range<3>(16, 32, 64));
+  assert(ThreeDimNdRange.get_group_range() == sycl::range<3>(2, 2, 2));
+  assert(ThreeDimNdRange.get_offset() == sycl::id<3>(0, 0, 0));
   std::cout << "three_dim_nd_range passed " << std::endl;
 }
diff --git a/libsycl/test/basic/parallel_for_indexers.cpp b/libsycl/test/basic/parallel_for_indexers.cpp
index 930bdd457c7d7..f305d2c813de5 100644
--- a/libsycl/test/basic/parallel_for_indexers.cpp
+++ b/libsycl/test/basic/parallel_for_indexers.cpp
@@ -4,9 +4,7 @@
 
 #include <sycl/sycl.hpp>
 
-#include <cassert>
 #include <iostream>
-#include <memory>
 
 using namespace sycl;
 
@@ -21,19 +19,19 @@ int main() {
   {
     queue Q;
     int *Data = sycl::malloc_shared<int>(DataSize, Q);
-    for (size_t i = 0; i < DataSize; ++i)
-      Data[i] = -1;
+    for (size_t I = 0; I < DataSize; ++I)
+      Data[I] = -1;
 
-    Q.parallel_for<class id1>(GlobalRange,
+    Q.parallel_for<class Id1>(GlobalRange,
                               [=](id<1> Index) { Data[Index] = Index[0]; });
     Q.wait();
 
     Fail |= [&]() {
-      for (size_t i = 0; i < DataSize; ++i) {
-        const int ExpectedVal = i < GlobalRange[0] ? i : -1;
-        if (Data[i] != ExpectedVal) {
-          std::cout << "line: " << __LINE__ << " Data[" << i << "] is "
-                    << Data[i] << " expected " << ExpectedVal << std::endl;
+      for (size_t I = 0; I < DataSize; ++I) {
+        const int ExpectedVal = I < GlobalRange[0] ? I : -1;
+        if (Data[I] != ExpectedVal) {
+          std::cout << "line: " << __LINE__ << " Data[" << I << "] is "
+                    << Data[I] << " expected " << ExpectedVal << std::endl;
           return true;
         }
       }
@@ -45,30 +43,29 @@ int main() {
 
   // Item indexer without offset
   {
-    // TODO: replace strcut with sycl::int2 once implemented.
+    // TODO: replace struct with sycl::int2 once implemented.
     struct DoubleInt {
       int Id;
       int Range;
     };
     queue Q;
     DoubleInt *Data = sycl::malloc_shared<DoubleInt>(DataSize, Q);
-    for (size_t i = 0; i < DataSize; ++i)
-      Data[i] = {-1, -1};
+    for (size_t I = 0; I < DataSize; ++I)
+      Data[I] = {-1, -1};
 
-    Q.parallel_for<class item1_nooffset>(
-        GlobalRange, [=](item<1, false> Index) {
-          Data[Index.get_id()] = {int(Index.get_id()[0]),
-                                  int(Index.get_range()[0])};
-        });
+    Q.parallel_for<class Item1NoOffset>(GlobalRange, [=](item<1, false> Index) {
+      Data[Index.get_id()] = {int(Index.get_id()[0]),
+                              int(Index.get_range()[0])};
+    });
     Q.wait();
 
     Fail |= [&]() {
-      for (size_t i = 0; i < DataSize; ++i) {
-        const int ExpectedValID = i < GlobalRange[0] ? i : -1;
-        const int ExpectedValRange = i < GlobalRange[0] ? GlobalRange[0] : -1;
-        if (Data[i].Id != ExpectedValID || Data[i].Range != ExpectedValRange) {
-          std::cout << "line: " << __LINE__ << " Data[" << i << "] is {"
-                    << Data[i].Id << ", " << Data[i].Range << "} expected {"
+      for (size_t I = 0; I < DataSize; ++I) {
+        const int ExpectedValID = I < GlobalRange[0] ? I : -1;
+        const int ExpectedValRange = I < GlobalRange[0] ? GlobalRange[0] : -1;
+        if (Data[I].Id != ExpectedValID || Data[I].Range != ExpectedValRange) {
+          std::cout << "line: " << __LINE__ << " Data[" << I << "] is {"
+                    << Data[I].Id << ", " << Data[I].Range << "} expected {"
                     << ExpectedValID << ", " << ExpectedValRange << "}"
                     << std::endl;
           return true;
@@ -79,9 +76,7 @@ int main() {
     free(Data, Q);
   }
 
-  // TODO:  Item indexer with offset
-  // blocked by liboffload support
-  // blocked by absence of sycl::handler implementation
+  // TODO: Item indexer with offset, blocked by liboffload support.
 
   // TODO: add nd_item check
   return Fail;
diff --git a/libsycl/test/basic/platform_get_devices.cpp b/libsycl/test/basic/platform_get_devices.cpp
index 37e9550e591a9..4e43b2455271b 100644
--- a/libsycl/test/basic/platform_get_devices.cpp
+++ b/libsycl/test/basic/platform_get_devices.cpp
@@ -7,9 +7,12 @@
 #include <sycl/sycl.hpp>
 
 #include <algorithm>
+#include <cassert>
 #include <iostream>
+#include <string>
+#include <vector>
 
-std::string BackendToString(sycl::backend Backend) {
+std::string backendToString(sycl::backend Backend) {
   switch (Backend) {
   case sycl::backend::opencl:
     return "opencl";
@@ -24,7 +27,7 @@ std::string BackendToString(sycl::backend Backend) {
   }
 }
 
-std::string DeviceTypeToString(sycl::info::device_type DevType) {
+std::string deviceTypeToString(sycl::info::device_type DevType) {
   switch (DevType) {
   case sycl::info::device_type::all:
     return "device_type::all";
@@ -45,14 +48,14 @@ std::string DeviceTypeToString(sycl::info::device_type DevType) {
   }
 }
 
-std::string GenerateDeviceDescription(sycl::info::device_type DevType,
+std::string generateDeviceDescription(sycl::info::device_type DevType,
                                       const sycl::platform &Platform) {
-  return std::string(DeviceTypeToString(DevType)) + " (" +
-         BackendToString(Platform.get_backend()) + ")";
+  return std::string(deviceTypeToString(DevType)) + " (" +
+         backendToString(Platform.get_backend()) + ")";
 }
 
 template <typename T1, typename T2>
-int Check(const T1 &LHS, const T2 &RHS, std::string TestName) {
+int check(const T1 &LHS, const T2 &RHS, std::string TestName) {
   if (LHS == RHS)
     return 0;
 
@@ -61,7 +64,7 @@ int Check(const T1 &LHS, const T2 &RHS, std::string TestName) {
   return 1;
 }
 
-int CheckDeviceType(const sycl::platform &P, sycl::info::device_type DevType,
+int checkDeviceType(const sycl::platform &P, sycl::info::device_type DevType,
                     std::vector<sycl::device> &AllDevices) {
   // This check verifies data of device with specific device_type and if it is
   // correctly chosen among all devices (device_type::all).
@@ -73,14 +76,14 @@ int CheckDeviceType(const sycl::platform &P, sycl::info::device_type DevType,
 
   if (DevType == sycl::info::device_type::automatic) {
     if (AllDevices.empty()) {
-      Failures += Check(Devices.size(), 0,
+      Failures += check(Devices.size(), 0,
                         "No devices reported for device_type::all query, but "
                         "device_type::automatic returns a device.");
     } else {
-      Failures += Check(Devices.size(), 1,
+      Failures += check(Devices.size(), 1,
                         "Number of devices for device_type::automatic query.");
       if (Devices.size())
-        Failures += Check(
+        Failures += check(
             std::count(AllDevices.begin(), AllDevices.end(), Devices[0]), 1,
             "Device is in the set of device_type::all devices in the "
             "platform.");
@@ -93,18 +96,18 @@ int CheckDeviceType(const sycl::platform &P, sycl::info::device_type DevType,
   for (sycl::device Device : Devices)
     DevCount += (Device.get_info<sycl::info::device::device_type>() == DevType);
 
-  Failures += Check(Devices.size(), DevCount,
+  Failures += check(Devices.size(), DevCount,
                     "Unexpected number of devices for " +
-                        GenerateDeviceDescription(DevType, P));
+                        generateDeviceDescription(DevType, P));
 
   Failures +=
-      Check(std::all_of(Devices.begin(), Devices.end(),
+      check(std::all_of(Devices.begin(), Devices.end(),
                         [&](const auto &Dev) {
                           return std::count(AllDevices.begin(),
                                             AllDevices.end(), Dev) == 1;
                         }),
             true,
-            "Not all devices for " + GenerateDeviceDescription(DevType, P) +
+            "Not all devices for " + generateDeviceDescription(DevType, P) +
                 " appear in the list of all devices");
 
   return Failures;
@@ -119,7 +122,7 @@ int main() {
          {sycl::info::device_type::cpu, sycl::info::device_type::gpu,
           sycl::info::device_type::accelerator, sycl::info::device_type::custom,
           sycl::info::device_type::automatic, sycl::info::device_type::host})
-      Failures += CheckDeviceType(P, DevType, Devices);
+      Failures += checkDeviceType(P, DevType, Devices);
   }
   return Failures;
 }
diff --git a/libsycl/test/basic/queue_parallel_for_generic.cpp b/libsycl/test/basic/queue_parallel_for_generic.cpp
index 03943f7ed141f..6bb959d61d288 100644
--- a/libsycl/test/basic/queue_parallel_for_generic.cpp
+++ b/libsycl/test/basic/queue_parallel_for_generic.cpp
@@ -4,8 +4,6 @@
 
 #include <sycl/sycl.hpp>
 
-#include <cassert>
-#include <iostream>
 #include <type_traits>
 
 int main() {
@@ -19,60 +17,60 @@ int main() {
 
   auto A = static_cast<int *>(sycl::malloc_shared(N * sizeof(int), Dev, Ctx));
 
-  for (int i = 0; i < N; ++i) {
-    A[i] = 1;
+  for (int I = 0; I < N; ++I) {
+    A[I] = 1;
   }
 
-  Q.parallel_for<class IntRange>(N, [=](auto i) {
-    static_assert(std::is_same<decltype(i), sycl::item<1>>::value,
+  Q.parallel_for<class IntRange>(N, [=](auto I) {
+    static_assert(std::is_same<decltype(I), sycl::item<1>>::value,
                   "lambda arg type is unexpected");
-    A[i]++;
+    A[I]++;
   });
 
-  Q.parallel_for<class InitRange>({N}, [=](auto i) {
-    static_assert(std::is_same<decltype(i), sycl::item<1>>::value,
+  Q.parallel_for<class InitRange>({N}, [=](auto I) {
+    static_assert(std::is_same<decltype(I), sycl::item<1>>::value,
                   "lambda arg type is unexpected");
-    A[i]++;
+    A[I]++;
   });
 
-  Q.parallel_for<class InitRange2D>({4, 2}, [=](auto i) {
-    static_assert(std::is_same<decltype(i), sycl::item<2>>::value,
+  Q.parallel_for<class InitRange2D>({4, 2}, [=](auto I) {
+    static_assert(std::is_same<decltype(I), sycl::item<2>>::value,
                   "lambda arg type is unexpected");
-    A[i.get_linear_id()]++;
+    A[I.get_linear_id()]++;
   });
 
-  Q.parallel_for<class InitRange3D>({2, 2, 2}, [=](auto i) {
-    static_assert(std::is_same<decltype(i), sycl::item<3>>::value,
+  Q.parallel_for<class InitRange3D>({2, 2, 2}, [=](auto I) {
+    static_assert(std::is_same<decltype(I), sycl::item<3>>::value,
                   "lambda arg type is unexpected");
-    A[i.get_linear_id()]++;
+    A[I.get_linear_id()]++;
   });
 
   sycl::nd_range<1> NDR(sycl::range<1>{N}, sycl::range<1>{2});
-  Q.parallel_for<class NdRange1D>(NDR, [=](auto nd_i) {
-    static_assert(std::is_same<decltype(nd_i), sycl::nd_item<1>>::value,
+  Q.parallel_for<class NdRange1D>(NDR, [=](auto NdItem) {
+    static_assert(std::is_same<decltype(NdItem), sycl::nd_item<1>>::value,
                   "lambda arg type is unexpected");
-    A[nd_i.get_global_id()]++;
+    A[NdItem.get_global_id()]++;
   });
 
   sycl::nd_range<2> NDR2D(sycl::range<2>{4, 2}, sycl::range<2>{2, 1});
-  Q.parallel_for<class NdRange2D>(NDR2D, [=](auto nd_i) {
-    static_assert(std::is_same<decltype(nd_i), sycl::nd_item<2>>::value,
+  Q.parallel_for<class NdRange2D>(NDR2D, [=](auto NdItem) {
+    static_assert(std::is_same<decltype(NdItem), sycl::nd_item<2>>::value,
                   "lambda arg type is unexpected");
-    A[nd_i.get_global_linear_id()]++;
+    A[NdItem.get_global_linear_id()]++;
   });
 
   sycl::nd_range<3> NDR3D(sycl::range<3>{2, 2, 2}, sycl::range<3>{1, 2, 2});
-  Q.parallel_for<class NdRange3D>(NDR3D, [=](auto nd_i) {
-    static_assert(std::is_same<decltype(nd_i), sycl::nd_item<3>>::value,
+  Q.parallel_for<class NdRange3D>(NDR3D, [=](auto NdItem) {
+    static_assert(std::is_same<decltype(NdItem), sycl::nd_item<3>>::value,
                   "lambda arg type is unexpected");
-    A[nd_i.get_global_linear_id()]++;
+    A[NdItem.get_global_linear_id()]++;
   });
 
   Q.wait();
 
   bool Fail{};
-  for (int i = 0; i < N; i++) {
-    Fail |= !(A[i] == 8);
+  for (int I = 0; I < N; I++) {
+    Fail |= !(A[I] == 8);
   }
   sycl::free(A, Ctx);
   return Fail;
diff --git a/libsycl/test/basic/queue_single_task.cpp b/libsycl/test/basic/queue_single_task.cpp
new file mode 100644
index 0000000000000..139b5221590aa
--- /dev/null
+++ b/libsycl/test/basic/queue_single_task.cpp
@@ -0,0 +1,20 @@
+// REQUIRES: any-device
+// RUN: %clangxx -fsycl  %s -o %t.out
+// RUN: %t.out
+
+#include <sycl/sycl.hpp>
+
+class Test;
+
+int main() {
+  sycl::queue Q;
+  int *Ptr = sycl::malloc_shared<int>(1, Q);
+  *Ptr = 0;
+  Q.single_task<Test>([=]() { *Ptr = 42; });
+  Q.wait();
+
+  bool Failed = *Ptr != 42;
+
+  sycl::free(Ptr, Q);
+  return Failed;
+}
diff --git a/libsycl/test/basic/sub_group_by_value_semantics.cpp b/libsycl/test/basic/sub_group_by_value_semantics.cpp
index 9db3e3044fd47..a3b1092cec52e 100644
--- a/libsycl/test/basic/sub_group_by_value_semantics.cpp
+++ b/libsycl/test/basic/sub_group_by_value_semantics.cpp
@@ -9,7 +9,7 @@ int main() {
   bool *Result = sycl::malloc_shared<bool>(1, Q);
   Result[0] = true;
 
-  Q.parallel_for<class sub_group_by_value_semantics>(
+  Q.parallel_for<class SubGroupByValueSemantics>(
       sycl::nd_range<3>({1, 1, 1}, {1, 1, 1}), [=](sycl::nd_item<3> Item) {
         sycl::sub_group A = Item.get_sub_group();
 
diff --git a/libsycl/test/basic/sub_group_common.cpp b/libsycl/test/basic/sub_group_common.cpp
index 11ab99248cc55..9943a528b50c9 100644
--- a/libsycl/test/basic/sub_group_common.cpp
+++ b/libsycl/test/basic/sub_group_common.cpp
@@ -20,7 +20,7 @@ bool check(sycl::queue &Q, unsigned int G, unsigned int L) {
     SyclData[I] = {0, 0, 0, 0, 0};
   SgSize[0] = 0;
 
-  Q.parallel_for<class sycl_subgr_common>(
+  Q.parallel_for<class SyclSubgrCommon>(
       sycl::nd_range<1>(sycl::range<1>(G), sycl::range<1>(L)),
       [=](sycl::nd_item<1> NdItem) {
         sycl::sub_group SG = NdItem.get_sub_group();
diff --git a/libsycl/test/basic/submit_fn_ptr.cpp b/libsycl/test/basic/submit_fn_ptr.cpp
deleted file mode 100644
index b933c87e4ad15..0000000000000
--- a/libsycl/test/basic/submit_fn_ptr.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-// REQUIRES: any-device
-// RUN: %clangxx -fsycl  %s -o %t.out
-// RUN: %t.out
-
-#include <sycl/sycl.hpp>
-
-class Test;
-
-int main() {
-  sycl::queue q;
-  int *p = sycl::malloc_shared<int>(1, q);
-  *p = 0;
-  q.single_task<Test>([=]() { *p = 42; });
-  q.wait();
-
-  bool Failed = *p != 42;
-
-  sycl::free(p, q);
-  return Failed;
-}
diff --git a/libsycl/test/basic/wrapped_usm_pointers.cpp b/libsycl/test/basic/wrapped_usm_pointers.cpp
index c936dcada4a6b..26a30462a1e9c 100644
--- a/libsycl/test/basic/wrapped_usm_pointers.cpp
+++ b/libsycl/test/basic/wrapped_usm_pointers.cpp
@@ -20,7 +20,7 @@ struct NonTrivial {
   int Addition;
   int *Data;
 
-  NonTrivial(int *D, int A) : Data(D), Addition(A) {}
+  NonTrivial(int *D, int A) : Addition(A), Data(D) {}
 };
 
 struct NonTrivialDerived : NonTrivial {
@@ -64,9 +64,9 @@ int main() {
 
   // Test array of structs containing pointers.
   Simple SimpleArr[NumOfElements];
-  for (int i = 0; i < NumOfElements; ++i) {
-    SimpleArr[i].Data = sycl::malloc_shared<int>(NumOfElements, Q);
-    SimpleArr[i].Addition = 38 + i;
+  for (int I = 0; I < NumOfElements; ++I) {
+    SimpleArr[I].Data = sycl::malloc_shared<int>(NumOfElements, Q);
+    SimpleArr[I].Addition = 38 + I;
   }
 
   Q.parallel_for(range<2>(NumOfElements, NumOfElements), [=](item<2> Idx) {
@@ -77,10 +77,10 @@ int main() {
   Q.wait();
 
   auto Checker = [](auto Obj) {
-    for (int i = 0; i < NumOfElements; ++i) {
-      if (Obj.Data[i] != (i + Obj.Addition)) {
-        std::cout << "line: " << __LINE__ << " result[" << i << "] is "
-                  << Obj.Data[i] << " expected " << i + Obj.Addition
+    for (int I = 0; I < NumOfElements; ++I) {
+      if (Obj.Data[I] != (I + Obj.Addition)) {
+        std::cout << "line: " << __LINE__ << " result[" << I << "] is "
+                  << Obj.Data[I] << " expected " << I + Obj.Addition
                   << std::endl;
         return true; // true if fail
       }
@@ -95,8 +95,8 @@ int main() {
   Fail |= Checker(NonTrivialDerivedObj);
   Fail |= Checker(WrapperOfSimpleObj.Obj);
 
-  for (int i = 0; i < NumOfElements; ++i)
-    Fail |= Checker(SimpleArr[i]);
+  for (int I = 0; I < NumOfElements; ++I)
+    Fail |= Checker(SimpleArr[I]);
 
   // Free allocated memory.
   sycl::free(NonTrivialObj.Data, Q);
@@ -104,8 +104,8 @@ int main() {
   sycl::free(SimpleObj.Data, Q);
   sycl::free(WrapperOfSimpleObj.Obj.Data, Q);
 
-  for (int i = 0; i < NumOfElements; ++i)
-    sycl::free(SimpleArr[i].Data, Q);
+  for (int I = 0; I < NumOfElements; ++I)
+    sycl::free(SimpleArr[I].Data, Q);
 
   return Fail;
 }
diff --git a/libsycl/test/usm/Inputs/fill_memset_common.hpp b/libsycl/test/usm/Inputs/fill_memset_common.hpp
index 5018aeb0ba4a9..9192e837a978f 100644
--- a/libsycl/test/usm/Inputs/fill_memset_common.hpp
+++ b/libsycl/test/usm/Inputs/fill_memset_common.hpp
@@ -5,6 +5,10 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
+
+#ifndef _LIBSYCL_TEST_USM_INPUTS_FILL_MEMSET_COMMON_HPP
+#define _LIBSYCL_TEST_USM_INPUTS_FILL_MEMSET_COMMON_HPP
+
 #include <sycl/sycl.hpp>
 
 #include <cassert>
@@ -46,3 +50,5 @@ void runTests(sycl::queue &Q, OpT Op, PatternT Pattern = 42) {
   test<true>(Q, sycl::malloc_shared<DataT>(ElementCount, Q), Op, Pattern);
   test<true>(Q, sycl::malloc_device<DataT>(ElementCount, Q), Op, Pattern);
 }
+
+#endif // _LIBSYCL_TEST_USM_INPUTS_FILL_MEMSET_COMMON_HPP
diff --git a/libsycl/test/usm/alloc_functions.cpp b/libsycl/test/usm/alloc_functions.cpp
index 727d67e2be60d..c007a38c64595 100644
--- a/libsycl/test/usm/alloc_functions.cpp
+++ b/libsycl/test/usm/alloc_functions.cpp
@@ -6,6 +6,8 @@
 
 #include <cassert>
 #include <cstddef>
+#include <cstdint>
+#include <initializer_list>
 #include <iostream>
 #include <tuple>
 
@@ -14,15 +16,15 @@ using namespace sycl;
 constexpr size_t Align = 256;
 
 struct alignas(Align) Aligned {
-  int x;
+  int X;
 };
 
 int main() {
-  queue q;
-  context ctx = q.get_context();
-  device d = q.get_device();
+  queue Q;
+  context Ctx = Q.get_context();
+  device Dev = Q.get_device();
 
-  auto check = [&q](size_t Alignment, auto AllocFn, int Line = __builtin_LINE(),
+  auto Check = [&Q](size_t Alignment, auto AllocFn, int Line = __builtin_LINE(),
                     int Case = 0) {
     // First allocation might naturally be over-aligned. Do several of them to
     // do the verification;
@@ -30,16 +32,16 @@ int main() {
     for (auto *&Elem : Arr)
       Elem = AllocFn();
     for (auto *Ptr : Arr) {
-      auto v = reinterpret_cast<uintptr_t>(Ptr);
-      if ((v & (Alignment - 1)) != 0) {
+      auto Addr = reinterpret_cast<uintptr_t>(Ptr);
+      if ((Addr & (Alignment - 1)) != 0) {
         std::cout << "Failed at line " << Line << ", case " << Case
                   << std::endl;
         assert(false && "Not properly aligned!");
-        break; // To be used with commented out assert above.
+        break; // Reached only if asserts are disabled.
       }
     }
     for (auto *Ptr : Arr)
-      free(Ptr, q);
+      free(Ptr, Q);
   };
 
   // The strictest (largest) fundamental alignment of any type is the alignment
@@ -53,165 +55,167 @@ int main() {
         [&](auto... Fs) {
           int Case = 0;
           (void)std::initializer_list<int>{
-              (check(Expected, Fs, Line, Case++), 0)...};
+              (Check(Expected, Fs, Line, Case++), 0)...};
         },
         Funcs);
   };
 
-  auto MDevice = [&](auto... args) {
-    return malloc_device(sizeof(std::max_align_t), args...);
+  auto MDevice = [&](auto... Args) {
+    return malloc_device(sizeof(std::max_align_t), Args...);
   };
   CheckAll(FAlign,
-           std::tuple{[&]() { return MDevice(q); },
-                      [&]() { return MDevice(d, ctx); },
-                      [&]() { return MDevice(q, property_list{}); },
-                      [&]() { return MDevice(d, ctx, property_list{}); }});
+           std::tuple{[&]() { return MDevice(Q); },
+                      [&]() { return MDevice(Dev, Ctx); },
+                      [&]() { return MDevice(Q, property_list{}); },
+                      [&]() { return MDevice(Dev, Ctx, property_list{}); }});
 
-  auto ADevice = [&](auto... args) {
-    return aligned_alloc_device(Align, 1024, args...);
+  auto ADevice = [&](auto... Args) {
+    return aligned_alloc_device(Align, 1024, Args...);
   };
 
   CheckAll(Align, std::tuple{
-                      [&]() { return ADevice(q); },
-                      [&]() { return ADevice(d, ctx); },
-                      [&]() { return ADevice(q, property_list{}); },
-                      [&]() { return ADevice(d, ctx, property_list{}); },
+                      [&]() { return ADevice(Q); },
+                      [&]() { return ADevice(Dev, Ctx); },
+                      [&]() { return ADevice(Q, property_list{}); },
+                      [&]() { return ADevice(Dev, Ctx, property_list{}); },
                   });
 
-  auto MHost = [&](auto... args) {
-    return malloc_host(sizeof(std::max_align_t), args...);
+  auto MHost = [&](auto... Args) {
+    return malloc_host(sizeof(std::max_align_t), Args...);
   };
 
   CheckAll(FAlign,
-           std::tuple{[&]() { return MHost(q); }, [&]() { return MHost(ctx); },
-                      [&]() { return MHost(q, property_list{}); },
-                      [&]() { return MHost(ctx, property_list{}); }});
+           std::tuple{[&]() { return MHost(Q); }, [&]() { return MHost(Ctx); },
+                      [&]() { return MHost(Q, property_list{}); },
+                      [&]() { return MHost(Ctx, property_list{}); }});
 
-  auto AHost = [&](auto... args) {
-    return aligned_alloc_host(Align, 1024, args...);
+  auto AHost = [&](auto... Args) {
+    return aligned_alloc_host(Align, 1024, Args...);
   };
 
   CheckAll(Align, std::tuple{
-                      [&]() { return AHost(q); },
-                      [&]() { return AHost(ctx); },
-                      [&]() { return AHost(q, property_list{}); },
-                      [&]() { return AHost(ctx, property_list{}); },
+                      [&]() { return AHost(Q); },
+                      [&]() { return AHost(Ctx); },
+                      [&]() { return AHost(Q, property_list{}); },
+                      [&]() { return AHost(Ctx, property_list{}); },
                   });
 
-  if (d.has(aspect::usm_shared_allocations)) {
-    auto MShared = [&](auto... args) {
-      return malloc_shared(sizeof(std::max_align_t), args...);
+  if (Dev.has(aspect::usm_shared_allocations)) {
+    auto MShared = [&](auto... Args) {
+      return malloc_shared(sizeof(std::max_align_t), Args...);
     };
 
     CheckAll(FAlign,
-             std::tuple{[&]() { return MShared(q); },
-                        [&]() { return MShared(d, ctx); },
-                        [&]() { return MShared(q, property_list{}); },
-                        [&]() { return MShared(d, ctx, property_list{}); }});
+             std::tuple{[&]() { return MShared(Q); },
+                        [&]() { return MShared(Dev, Ctx); },
+                        [&]() { return MShared(Q, property_list{}); },
+                        [&]() { return MShared(Dev, Ctx, property_list{}); }});
 
-    auto AShared = [&](auto... args) {
-      return aligned_alloc_shared(Align, 1024, args...);
+    auto AShared = [&](auto... Args) {
+      return aligned_alloc_shared(Align, 1024, Args...);
     };
     CheckAll(Align, std::tuple{
-                        [&]() { return AShared(q); },
-                        [&]() { return AShared(d, ctx); },
-                        [&]() { return AShared(q, property_list{}); },
-                        [&]() { return AShared(d, ctx, property_list{}); },
+                        [&]() { return AShared(Q); },
+                        [&]() { return AShared(Dev, Ctx); },
+                        [&]() { return AShared(Q, property_list{}); },
+                        [&]() { return AShared(Dev, Ctx, property_list{}); },
                     });
   }
 
-  auto TDevice = [&](auto... args) {
-    return malloc_device<Aligned>(1, args...);
+  auto TDevice = [&](auto... Args) {
+    return malloc_device<Aligned>(1, Args...);
   };
-  CheckAll(Align, std::tuple{[&]() { return TDevice(q); },
-                             [&]() { return TDevice(d, ctx); }});
+  CheckAll(Align, std::tuple{[&]() { return TDevice(Q); },
+                             [&]() { return TDevice(Dev, Ctx); }});
 
-  auto TADevice = [&](auto... args) {
-    return aligned_alloc_device<Aligned>(Align, 1, args...);
+  auto TADevice = [&](auto... Args) {
+    return aligned_alloc_device<Aligned>(Align, 1, Args...);
   };
 
-  CheckAll(Align, std::tuple{[&]() { return TADevice(q); },
-                             [&]() { return TADevice(d, ctx); }});
+  CheckAll(Align, std::tuple{[&]() { return TADevice(Q); },
+                             [&]() { return TADevice(Dev, Ctx); }});
 
-  auto THost = [&](auto... args) { return malloc_host<Aligned>(1, args...); };
-  CheckAll(Align, std::tuple{[&]() { return THost(q); },
-                             [&]() { return THost(ctx); }});
+  auto THost = [&](auto... Args) { return malloc_host<Aligned>(1, Args...); };
+  CheckAll(Align, std::tuple{[&]() { return THost(Q); },
+                             [&]() { return THost(Ctx); }});
 
-  auto TAHost = [&](auto... args) {
-    return aligned_alloc_host<Aligned>(Align, 1, args...);
+  auto TAHost = [&](auto... Args) {
+    return aligned_alloc_host<Aligned>(Align, 1, Args...);
   };
-  CheckAll(Align, std::tuple{[&]() { return TAHost(q); },
-                             [&]() { return TAHost(ctx); }});
+  CheckAll(Align, std::tuple{[&]() { return TAHost(Q); },
+                             [&]() { return TAHost(Ctx); }});
 
-  if (d.has(aspect::usm_shared_allocations)) {
-    auto TShared = [&](auto... args) {
-      return malloc_shared<Aligned>(1, args...);
+  if (Dev.has(aspect::usm_shared_allocations)) {
+    auto TShared = [&](auto... Args) {
+      return malloc_shared<Aligned>(1, Args...);
     };
-    CheckAll(Align, std::tuple{[&]() { return TShared(q); },
-                               [&]() { return TShared(d, ctx); }});
-    auto TAShared = [&](auto... args) {
-      return aligned_alloc_shared<Aligned>(Align, 1, args...);
+    CheckAll(Align, std::tuple{[&]() { return TShared(Q); },
+                               [&]() { return TShared(Dev, Ctx); }});
+    auto TAShared = [&](auto... Args) {
+      return aligned_alloc_shared<Aligned>(Align, 1, Args...);
     };
-    CheckAll(Align, std::tuple{[&]() { return TAShared(q); },
-                               [&]() { return TAShared(d, ctx); }});
+    CheckAll(Align, std::tuple{[&]() { return TAShared(Q); },
+                               [&]() { return TAShared(Dev, Ctx); }});
   }
 
-  auto Malloc = [&](auto... args) {
-    return malloc(sizeof(std::max_align_t), args...);
+  auto Malloc = [&](auto... Args) {
+    return malloc(sizeof(std::max_align_t), Args...);
   };
 
   CheckAll(
       FAlign,
-      std::tuple{
-          [&]() { return Malloc(q, usm::alloc::host); },
-          [&]() { return Malloc(d, ctx, usm::alloc::host); },
-          [&]() { return Malloc(q, usm::alloc::host, property_list{}); },
-          [&]() { return Malloc(d, ctx, usm::alloc::host, property_list{}); }});
-
-  auto AMalloc = [&](auto... args) {
-    return aligned_alloc(Align, 1024, args...);
+      std::tuple{[&]() { return Malloc(Q, usm::alloc::host); },
+                 [&]() { return Malloc(Dev, Ctx, usm::alloc::host); },
+                 [&]() { return Malloc(Q, usm::alloc::host, property_list{}); },
+                 [&]() {
+                   return Malloc(Dev, Ctx, usm::alloc::host, property_list{});
+                 }});
+
+  auto AMalloc = [&](auto... Args) {
+    return aligned_alloc(Align, 1024, Args...);
   };
 
-  CheckAll(
-      Align,
-      std::tuple{
-          [&]() { return AMalloc(q, usm::alloc::host); },
-          [&]() { return AMalloc(d, ctx, usm::alloc::host); },
-          [&]() { return AMalloc(q, usm::alloc::host, property_list{}); },
-          [&]() { return AMalloc(d, ctx, usm::alloc::host, property_list{}); },
-      });
-
-  auto TMalloc = [&](auto... args) { return malloc<Aligned>(1, args...); };
   CheckAll(Align,
-           std::tuple{[&]() { return TMalloc(q, usm::alloc::host); },
-                      [&]() { return TMalloc(d, ctx, usm::alloc::host); }});
+           std::tuple{
+               [&]() { return AMalloc(Q, usm::alloc::host); },
+               [&]() { return AMalloc(Dev, Ctx, usm::alloc::host); },
+               [&]() { return AMalloc(Q, usm::alloc::host, property_list{}); },
+               [&]() {
+                 return AMalloc(Dev, Ctx, usm::alloc::host, property_list{});
+               },
+           });
+
+  auto TMalloc = [&](auto... Args) { return malloc<Aligned>(1, Args...); };
+  CheckAll(Align,
+           std::tuple{[&]() { return TMalloc(Q, usm::alloc::host); },
+                      [&]() { return TMalloc(Dev, Ctx, usm::alloc::host); }});
 
-  auto TAMalloc = [&](auto... args) {
-    return aligned_alloc<Aligned>(Align, 1, args...);
+  auto TAMalloc = [&](auto... Args) {
+    return aligned_alloc<Aligned>(Align, 1, Args...);
   };
 
   CheckAll(Align,
-           std::tuple{[&]() { return TAMalloc(q, usm::alloc::host); },
-                      [&]() { return TAMalloc(d, ctx, usm::alloc::host); }});
+           std::tuple{[&]() { return TAMalloc(Q, usm::alloc::host); },
+                      [&]() { return TAMalloc(Dev, Ctx, usm::alloc::host); }});
 
   // Testing invalid arguments for alignment
-  assert(aligned_alloc_device(3, 1024, q) == nullptr);
-  assert(aligned_alloc_host(3, 1024, q) == nullptr);
-  assert(aligned_alloc_shared(3, 1024, q) == nullptr);
+  assert(aligned_alloc_device(3, 1024, Q) == nullptr);
+  assert(aligned_alloc_host(3, 1024, Q) == nullptr);
+  assert(aligned_alloc_shared(3, 1024, Q) == nullptr);
 
   // A requested alignment of 0 means "no specific alignment" and must
   // succeed, routing through the plain (non-aligned) allocation path.
-  void *ZeroAlignPtr = aligned_alloc_device(0, 1024, q);
+  void *ZeroAlignPtr = aligned_alloc_device(0, 1024, Q);
   assert(ZeroAlignPtr != nullptr);
-  free(ZeroAlignPtr, q);
+  free(ZeroAlignPtr, Q);
 
-  ZeroAlignPtr = aligned_alloc_host(0, 1024, q);
+  ZeroAlignPtr = aligned_alloc_host(0, 1024, Q);
   assert(ZeroAlignPtr != nullptr);
-  free(ZeroAlignPtr, q);
+  free(ZeroAlignPtr, Q);
 
-  ZeroAlignPtr = aligned_alloc_shared(0, 1024, q);
+  ZeroAlignPtr = aligned_alloc_shared(0, 1024, Q);
   assert(ZeroAlignPtr != nullptr);
-  free(ZeroAlignPtr, q);
+  free(ZeroAlignPtr, Q);
 
   return 0;
 }
diff --git a/libsycl/test/usm/memcpy.cpp b/libsycl/test/usm/memcpy.cpp
index f297c1b36728d..58509c724b767 100644
--- a/libsycl/test/usm/memcpy.cpp
+++ b/libsycl/test/usm/memcpy.cpp
@@ -4,9 +4,12 @@
 
 #include <sycl/sycl.hpp>
 
+#include <cassert>
 #include <cstddef>
+#include <memory>
 #include <numeric>
 #include <tuple>
+#include <vector>
 
 using namespace sycl;
 
@@ -17,9 +20,9 @@ constexpr std::size_t NumBytes = DataSize * sizeof(int);
 // performing a sequence of copies from one allocation to the next,
 // using MemCpyFunc to specify dependencies.
 // Assumes that the first and the last allocations are accessible on host.
-template <typename MemcpyFuncT, typename... AllocFuncssT>
+template <typename MemcpyFuncT, typename... AllocFuncsT>
 void test(queue &Q, MemcpyFuncT MemCpyFunc,
-          std::tuple<AllocFuncssT...> AllocFs) {
+          std::tuple<AllocFuncsT...> AllocFs) {
   constexpr std::size_t NAllocations = std::tuple_size_v<decltype(AllocFs)>;
   static_assert(NAllocations > 1);
 
diff --git a/libsycl/test/usm/prefetch.cpp b/libsycl/test/usm/prefetch.cpp
index e13d87a9a5c6f..80951ebd80e89 100644
--- a/libsycl/test/usm/prefetch.cpp
+++ b/libsycl/test/usm/prefetch.cpp
@@ -4,6 +4,7 @@
 
 #include <sycl/sycl.hpp>
 
+#include <cassert>
 #include <cstddef>
 
 using namespace sycl;
diff --git a/libsycl/tools/sycl-ls/sycl-ls.cpp b/libsycl/tools/sycl-ls/sycl-ls.cpp
index 2938d767a404b..f945820c0eaf8 100644
--- a/libsycl/tools/sycl-ls/sycl-ls.cpp
+++ b/libsycl/tools/sycl-ls/sycl-ls.cpp
@@ -16,12 +16,15 @@
 
 #include "llvm/Support/CommandLine.h"
 
+#include <cstdint>
+#include <cstdlib>
 #include <iostream>
+#include <string>
+#include <string_view>
 
 using namespace sycl;
-using namespace std::literals;
 
-inline std::string_view getBackendName(const backend &Backend) {
+static std::string_view getBackendName(backend Backend) {
   switch (Backend) {
   case backend::opencl:
     return "opencl";
@@ -36,9 +39,8 @@ inline std::string_view getBackendName(const backend &Backend) {
   return "";
 }
 
-std::string getDeviceTypeName(const device &Device) {
-  auto DeviceType = Device.get_info<info::device::device_type>();
-  switch (DeviceType) {
+static std::string_view getDeviceTypeName(const device &Device) {
+  switch (Device.get_info<info::device::device_type>()) {
   case info::device_type::cpu:
     return "cpu";
   case info::device_type::gpu:
@@ -47,9 +49,15 @@ std::string getDeviceTypeName(const device &Device) {
     return "host";
   case info::device_type::accelerator:
     return "accelerator";
-  default:
-    return "unknown";
+  case info::device_type::custom:
+    return "custom";
+  case info::device_type::automatic:
+    return "automatic";
+  case info::device_type::all:
+    return "all";
   }
+
+  return "unknown";
 }
 
 static void printDeviceInfo(const device &Device, bool Verbose,
@@ -75,12 +83,11 @@ static void
 printSelectorChoice(const detail::DeviceSelectorInvocableType &Selector,
                     const std::string &Prepend) {
   try {
-    const auto &Device = device(Selector);
-    std::string DeviceTypeName = getDeviceTypeName(Device);
-    auto Platform = Device.get_info<info::device::platform>();
-    auto PlatformName = Platform.get_info<info::platform::name>();
-    printDeviceInfo(Device, false /*Verbose*/,
-                    Prepend + DeviceTypeName + ", " + PlatformName);
+    const device Device(Selector);
+    const platform Platform = Device.get_info<info::device::platform>();
+    printDeviceInfo(Device, /*Verbose=*/false,
+                    Prepend + std::string(getDeviceTypeName(Device)) + ", " +
+                        Platform.get_info<info::platform::name>());
   } catch (const sycl::exception &Exception) {
     std::string What = Exception.what();
     constexpr size_t MaxLength = 80;
@@ -125,7 +132,7 @@ int main(int argc, char **argv) {
 
     if (Verbose) {
       std::cout << "\nPlatforms: " << Platforms.size() << std::endl;
-      uint32_t PlatformNum = 0;
+      std::uint32_t PlatformNum = 0;
       for (const auto &Platform : Platforms) {
         ++PlatformNum;
         auto PlatformVersion = Platform.get_info<info::platform::version>();
@@ -149,8 +156,8 @@ int main(int argc, char **argv) {
       printSelectorChoice(cpu_selector_v, "cpu_selector()          : ");
       printSelectorChoice(gpu_selector_v, "gpu_selector()          : ");
     }
-  } catch (sycl::exception &e) {
-    std::cerr << "SYCL Exception encountered: " << e.what() << std::endl
+  } catch (const sycl::exception &Exception) {
+    std::cerr << "SYCL Exception encountered: " << Exception.what() << std::endl
               << std::endl;
     return EXIT_FAILURE;
   }
diff --git a/libsycl/unittests/common/unittests_helper.hpp b/libsycl/unittests/common/unittests_helper.hpp
index 49a16d5c5fb68..6109a1ed39370 100644
--- a/libsycl/unittests/common/unittests_helper.hpp
+++ b/libsycl/unittests/common/unittests_helper.hpp
@@ -32,7 +32,7 @@ struct UnittestsHelper {
   // Platforms cached by earlier tests would hide the device enumeration mocked
   // by the fixture, so the global state is reset on both ends.
   UnittestsHelper() {
-    detail::PlatformImpl::rediscoverIfEmpty = true;
+    detail::PlatformImpl::MRediscoverIfEmpty = true;
     resetGlobalState();
   }
 
diff --git a/libsycl/unittests/context/context_ctors.cpp b/libsycl/unittests/context/context_ctors.cpp
index b5d050175f4ad..0c4b48acbeeaf 100644
--- a/libsycl/unittests/context/context_ctors.cpp
+++ b/libsycl/unittests/context/context_ctors.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include <mock/helpers.hpp>
 
 #include <sycl/__impl/context.hpp>
diff --git a/libsycl/unittests/handler/memcpy.cpp b/libsycl/unittests/handler/memcpy.cpp
index 24f04376ff79c..6e7a9a2796ae2 100644
--- a/libsycl/unittests/handler/memcpy.cpp
+++ b/libsycl/unittests/handler/memcpy.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include "test_helpers.hpp"
 #include <mock/helpers.hpp>
 
diff --git a/libsycl/unittests/handler/semantics.cpp b/libsycl/unittests/handler/semantics.cpp
index b4324a508554b..8ba7b909ef5ad 100644
--- a/libsycl/unittests/handler/semantics.cpp
+++ b/libsycl/unittests/handler/semantics.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include "test_helpers.hpp"
 #include <mock/helpers.hpp>
 
@@ -10,6 +18,7 @@
 #include <gtest/gtest.h>
 
 #include <string>
+#include <vector>
 
 using namespace sycl;
 using namespace ::testing;
@@ -108,7 +117,7 @@ TEST(Handler, EmptyCommandGroupNoDependencies) {
   E.wait();
 }
 
-TEST(Queue, SubmitCannotBeNested) {
+TEST(Handler, SubmitCannotBeNested) {
   mock::MockWrapper Mock;
   queue Q;
 
diff --git a/libsycl/unittests/handler/test_helpers.hpp b/libsycl/unittests/handler/test_helpers.hpp
index 1c383e747390e..0d96b9186b099 100644
--- a/libsycl/unittests/handler/test_helpers.hpp
+++ b/libsycl/unittests/handler/test_helpers.hpp
@@ -1,5 +1,13 @@
-#ifndef LIBSYCL_UNITTESTS_HANDLER_TEST_HELPERS_HPP
-#define LIBSYCL_UNITTESTS_HANDLER_TEST_HELPERS_HPP
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBSYCL_UNITTESTS_HANDLER_TEST_HELPERS_HPP
+#define _LIBSYCL_UNITTESTS_HANDLER_TEST_HELPERS_HPP
 
 #include <mock/helpers.hpp>
 
@@ -8,15 +16,17 @@
 #include <gmock/gmock.h>
 
 #include <algorithm>
-#include <initializer_list>
 #include <vector>
 
 _LIBSYCL_BEGIN_NAMESPACE_SYCL
 namespace unittests {
 
-inline void expectDeviceMemoryInfo(mock::MockWrapper &Mock,
-                                   const std::vector<const void *> ExpectedPtrs,
-                                   ol_device_handle_t Device, int Count) {
+// Expects Count olGetMemInfo(OL_MEM_INFO_DEVICE) queries, each for one of
+// ExpectedPtrs, and reports Device as the owning device.
+inline void
+expectDeviceMemoryInfo(mock::MockWrapper &Mock,
+                       const std::vector<const void *> &ExpectedPtrs,
+                       ol_device_handle_t Device, int Count) {
   EXPECT_CALL(Mock.get(),
               olGetMemInfo(::testing::_, ::testing::_, OL_MEM_INFO_DEVICE,
                            sizeof(ol_device_handle_t), ::testing::_))
@@ -34,4 +44,4 @@ inline void expectDeviceMemoryInfo(mock::MockWrapper &Mock,
 } // namespace unittests
 _LIBSYCL_END_NAMESPACE_SYCL
 
-#endif
+#endif // _LIBSYCL_UNITTESTS_HANDLER_TEST_HELPERS_HPP
diff --git a/libsycl/unittests/mock/helpers.cpp b/libsycl/unittests/mock/helpers.cpp
index bf0baf51b1917..24413675d6cbe 100644
--- a/libsycl/unittests/mock/helpers.cpp
+++ b/libsycl/unittests/mock/helpers.cpp
@@ -396,25 +396,24 @@ void mock::MockLiboffload::initDefault() {
           });
 
   ON_CALL(*this, olMemAllocAligned)
-      .WillByDefault([this](ol_context_handle_t Context,
-                            ol_device_handle_t Device,
-                            ol_alloc_type_t AllocType, size_t Size,
-                            size_t Alignment,
-                            void **AllocationOut) -> ol_result_t {
-        EXPECT_NE(Context, nullptr);
-        EXPECT_NE(Device, nullptr);
-        EXPECT_TRUE(AllocType == OL_ALLOC_TYPE_DEVICE ||
-                    AllocType == OL_ALLOC_TYPE_MANAGED);
-        EXPECT_GT(Size, 0);
-        EXPECT_GT(Alignment, 0);
-        if ((Alignment & (Alignment - 1)) != 0) {
-          return makeEmptyStrError(OL_ERRC_INVALID_ARGUMENT);
-        }
-        EXPECT_NE(AllocationOut, nullptr);
-
-        *AllocationOut = mock::createDummyHandle<void *>();
-        return OL_SUCCESS;
-      });
+      .WillByDefault(
+          [this](ol_context_handle_t Context, ol_device_handle_t Device,
+                 ol_alloc_type_t AllocType, size_t Size, size_t Alignment,
+                 void **AllocationOut) -> ol_result_t {
+            EXPECT_NE(Context, nullptr);
+            EXPECT_NE(Device, nullptr);
+            EXPECT_TRUE(AllocType == OL_ALLOC_TYPE_DEVICE ||
+                        AllocType == OL_ALLOC_TYPE_MANAGED);
+            EXPECT_GT(Size, 0);
+            EXPECT_GT(Alignment, 0);
+            if ((Alignment & (Alignment - 1)) != 0) {
+              return makeEmptyStrError(OL_ERRC_INVALID_ARGUMENT);
+            }
+            EXPECT_NE(AllocationOut, nullptr);
+
+            *AllocationOut = mock::createDummyHandle<void *>();
+            return OL_SUCCESS;
+          });
 
   ON_CALL(*this, olMemAllocAlignedHost)
       .WillByDefault([this](ol_context_handle_t Context,
diff --git a/libsycl/unittests/mock/helpers.hpp b/libsycl/unittests/mock/helpers.hpp
index b7b1d3a0735f2..317504ac75be2 100644
--- a/libsycl/unittests/mock/helpers.hpp
+++ b/libsycl/unittests/mock/helpers.hpp
@@ -29,14 +29,14 @@
 namespace mock {
 
 struct ol_dummy_handle_t {
-  ol_dummy_handle_t(size_t DataSize = 0) : MStorage(DataSize) {}
+  explicit ol_dummy_handle_t(size_t DataSize = 0) : MStorage(DataSize) {}
   ol_dummy_handle_t(unsigned char *Data, size_t Size) : MStorage(Size) {
     std::memcpy(MStorage.data(), Data, Size);
   }
 
   std::vector<unsigned char> MStorage;
 
-  template <typename T> const T getDataAs() const {
+  template <typename T> T getDataAs() const {
     assert(MStorage.size() >= sizeof(T));
     return *reinterpret_cast<const T *>(MStorage.data());
   }
@@ -192,7 +192,7 @@ class MockWrapper {
     Mock.initDefault();
   }
 
-  MockLiboffload &get() { return Mock; };
+  MockLiboffload &get() { return Mock; }
 
 private:
   MockLiboffload &Mock;
diff --git a/libsycl/unittests/queue/memcpy.cpp b/libsycl/unittests/queue/memcpy.cpp
index 9413c9cd5b63f..bdb13ee031c52 100644
--- a/libsycl/unittests/queue/memcpy.cpp
+++ b/libsycl/unittests/queue/memcpy.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include <common/unittests_helper.hpp>
 #include <mock/helpers.hpp>
 
@@ -6,7 +14,6 @@
 #include <sycl/__impl/queue.hpp>
 
 #include <detail/device_impl.hpp>
-#include <detail/queue_impl.hpp>
 
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
diff --git a/libsycl/unittests/queue/prefetch.cpp b/libsycl/unittests/queue/prefetch.cpp
index 6bedd4ba8337b..32ffd2e1760ec 100644
--- a/libsycl/unittests/queue/prefetch.cpp
+++ b/libsycl/unittests/queue/prefetch.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include <mock/helpers.hpp>
 
 #include <sycl/__impl/queue.hpp>
@@ -5,6 +13,8 @@
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
+#include <cstddef>
+
 using namespace sycl;
 using namespace ::testing;
 



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