Dependencies included in the release

• oneapi-src/[email protected]

Components included in the release

• clang version 19.0.0
• SYCL runtime version 8.0.0 (as indicated by predefined macro __LIBSYCL_MAJOR_VERSION, __LIBSYCL_MINOR_VERSION and __LIBSYCL_PATCH_VERSION)

Compatibility with previous releases

This is a patch/bugfix release for v6.0.0 and it is compatible with it. For compatibility with other releases, please see the corresponding documentation for v6.0.0.

Compatibility with oneAPI

Intel(R) oneAPI DPC++/C++ Compiler version 2025.0 release leverages codebase from sycl-rel-6_0_0 branch and it is the closest oneAPI DPC++/C++ compiler release to this one (in terms of available features and bugfixes).

However, this does not guarantee any feature or bugfix parity between these two releases.

We would like to specifically note that bugfixes and patches applied to 2025.0.X oneAPI patch releases do not match those made for this release.

Validation & quality expectations

In general, list of supported hardware and operating systems should match the one provided by Intel(R) oneAPI DPC++/C++ Compiler for version 2025.0, see corresponding system requirements.

However, we did not perform the same exhaustive testing of this open-source branch and therefore there could be some unique issues that are not present in Intel (R) oneAPI DPC++/C++ Compiler version 2025.0.

You can find full validation logs for the branch here but a summary of it will also be posted below.

End to end tests

The following hardware and software configurations were tested:

Driver versions listed as reported by sycl::device::get_info<info::device::driver_version>().

• Windows
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.6.31896
  • Intel(R) OpenCL Graphics on Intel(R) Iris(R) Xe Graphics OpenCL 3.0 NEO
    • Driver version: 32.0.101.6559
• Linux (Ubuntu 22.04)
  • Intel(R) OpenCL Graphics on Intel(R) Iris(R) Xe Graphics OpenCL 3.0 NEO
    • Driver version: 25.09.32961.5
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.6.32961.500000
  • Intel(R) OpenCL on
    11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80 Ghz OpenCL 3.0
    • Driver version: 2024.18.10.0.08_160000
  • AMD HIP BACKEND on AMD Radeon PRO W6800
    • Driver version: HIP 60342.13
  • NVIDIA CUDA BACKEND on NVIDIA A10G
    • Driver version: CUDA 12.1

SYCL CTS

• Linux (Ubuntu 22.04)
  • Intel(R) OpenCL on
    11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80 Ghz OpenCL 3.0
    • Driver version: 2024.18.10.0.08_160000
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.6.32961.500000

We use the latest available CTS in our validation, but sycl-rel-6.0.0 is an
old branch already and there were some CTS changes made which make them fail.

Known failures are:

• test_device CTS test fails because some OpenCL-specific device info queries
  do not throw exceptions on non-OpenCL backends. See KhronosGroup/SYCL-Docs#625
• test_header CTS target cannot be compiled, because definition of
  SYCL_LANGUAGE_VERSION does not match the latest version of the SYCL 2020
  specification. See KhronosGroup/SYCL-Docs#634
• test_language CTS target cannot be compiled, because the compiler does not
  abide to all new rules for constant-evaluated expression from the latest
  version of the SYCL 2020 specification. See KhronosGroup/SYCL-Docs#388
• multi_ptr CTS target can be compiled, but the test reports failure because
  of a compile-time disabled tests due to implementation of
  decorated_generic_ptr and raw_generic_ptr aliases is missing.
  See KhronosGroup/SYCL-Docs#598

How to use

This release does not provide a pre-built binaries of our SYCL compiler and
simply marks a known good commit on a corresponding release branch which can be
used for building the compiler and the runtime for your needs. To do so, follow
Get Started Guide

Detailed changelog

For a more detailed changelog refer to Release notes Jul'24 in our release notes document.

Changes since v6.0.0

This patch release contains a fix for error: SYCL kernel cannot call a variadic function issue mentioned in Known issues
section of the 6.0.0 release.

The issue should not be reproducible in most environment. Its reproducibility depends on implementation details of
specific C++ STL implementation that's installed on your system. However, we haven't seen a setup yet where it would
still be reproducible.

The fix has a potential to break ABI and to preserve compatibility, it won't kick in on systems where it would cause
an ABI-break (see the note above about reproducibility). If you still encounter it and do not care about binary
compatibility with previous releases, then you can define macro __SYCL_USE_PLAIN_ARRAY_AS_VEC_STORAGE=1 (before including sycl/sycl.hpp)
to force-enable the fix.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

Dependencies included in the release

• oneapi-src/[email protected]

Components included in the release

• clang version 19.0.0
• SYCL runtime version 8.0.0 (as indicated by predefined macro __LIBSYCL_MAJOR_VERSION, __LIBSYCL_MINOR_VERSION and __LIBSYCL_PATCH_VERSION)

Compatibility with previous releases

This is a first formal release in this repo and therefore there are no other releases to be compatible with.

However, the repo has existed for a while and this release is not compatible with builds produced from older commits, because there were ABI-breaking changes made to the codebase just prior taking the sycl-rel-6_0_0 branch.

Compatibility with oneAPI

Intel(R) oneAPI DPC++/C++ Compiler version 2025.0 leverages codebase from sycl-rel-6_0_0 branch and it is the closest oneAPI DPC++/C++ compiler release to this one (in terms of available features and bugfixes).

However, this does not guarantee any feature or bugfix parity between these two releases.

Validation & quality expectations

In general, list of supported hardware and operating systems should match the one provided by Intel(R) oneAPI DPC++/C++ Compiler for version 2025.0, see corresponding system requirements.

However, we did not perform the same exaustive testing of this open-source branch and therefore there could be some unique issues that are not present in Intel (R) oneAPI DPC++/C++ Compiler version 2025.0.

You can find full validation logs for the branch here but a summary of it will also be posted below.

End to end tests

The following hardware and software configurations were tested:

Driver versions listed as reported by sycl::device::get_info<info::device::driver_version>().

• Windows
  • Driver version: 32.0.101.6129
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.5.31093
  • Intel(R) OpenCL Graphics on Intel(R) Iris(R) Xe Graphics OpenCL 3.0 NEO
    • Driver version: 32.0.101.6129
• Linux (Ubuntu 22.04)
  • Intel(R) OpenCL Graphics on Intel(R) Iris(R) Xe Graphics OpenCL 3.0 NEO
    • Driver version: 24.52.32224.5
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.6.32224.500000
  • Intel(R) OpenCL on
    11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80 Ghz OpenCL 3.0
    • Driver version: 2024.18.10.0.08_160000
  • AMD HIP BACKEND on AMD Radeon RX 6700 XT gfx1031
    • Driver version: HIP 60342.13
  • NVIDIA CUDA BACKEND on NVIDIA A10G 8.6
    • Driver version: CUDA 12.1

SYCL CTS

• Linux (Ubuntu 22.04)
  • Intel(R) OpenCL on
    11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80 Ghz OpenCL 3.0
    • Driver version: 2024.18.10.0.08_160000
  • Intel(R) oneAPI Unified Runtime over Level-Zero on
    Intel(R) Iris(R) Xe Graphics 12.0.0
    • Driver version: 1.6.32224.500000

We use the latest available CTS in our validation, but sycl-rel-6.0.0 is an
old branch already and there were some CTS changes made which make them fail.

Known failures are:

• test_device CTS test fails because some OpenCL-specific device info queries
  do not throw exceptions on non-OpenCL backends. See KhronosGroup/SYCL-Docs#625
• test_header CTS target cannot be compiled, because definition of
  SYCL_LANGUAGE_VERSION does not match the latest version of the SYCL 2020
  specification. See KhronosGroup/SYCL-Docs#634
• test_language CTS target cannot be compiled, because the compiler does not
  abide to all new rules for constant-evaluated expression from the latest
  version of the SYCL 2020 specification. See KhronosGroup/SYCL-Docs#388
• multi_ptr CTS target cannot be compiled, because implementation for
  decorated_generic_ptr and raw_generic_ptr aliases is missing.
  See KhronosGroup/SYCL-Docs#598

How to use

This release does not provide a pre-built binaries of our SYCL compiler and
simply marks a known good commit on a corresponding release branch which can be
used for building the compiler and the runtime for your needs. To do so, follow
Get Started Guide

Detailed changelog

For a more detailed changelog refer to Release notes Jul'24 in our release notes document.

Known issues

This section describes additional issues which were reported that are not listed in the corresponding section of the detailed changelog.

error: SYCL kernel cannot call a variadic function

Compilation error like this will be reported for applications that use sycl::vec::operator[] (either directly, or indirectly through built-ins like sycl::group_broadcast) when compiled on Windows in Debug mode using clang.exe compiler driver.

There are a couple of workarounds available to it:

• switch to using clang-cl.exe driver
• pass an extra flag during compilation: -Xsycl-target-frontend "-D_CONTAINER_DEBUG_LEVEL=0 -D_ITERATOR_DEBUG_LEVEL=0"

Note that if your environment and application is not what described above (sycl::vec::operator[] usage on Windows in Debug mode through clang.exe compiler driver), then the error is expected to be legit, i.e. device code contains some illegal construct.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

This release contains OpenCL RT for Intel CPU and FPGA emulator used for oneAPI DPC++ Compiler and runtime validation
Please, see the runtime installation guide here.

New features

SYCL Compiler

• Added support for per-object device code compilation under the option
  -fno-sycl-rdc. This improves compiler performance and reduces memory usage,
  but can only be used if there are no cross-object dependencies. [f884993]
• Added support for per-aspect device code split mode. [9a2c4fe]
• Extended support for the large GRF mode to non-ESIMD kernels. [9994934]
  [ab2a42c]
• Implemented the sycl_ext_intel_device_architecture
  extension. [0e32a28] [b59d93c] [5bd5c87] [e5de913]
• Implemented the sycl_ext_oneapi_kernel_properties
  experimental extension. [332e4ee] [27454de] [70ee3d5] [430c722]
• Added support for generic address space atomic built-ins to CUDA libclc.
  [d6a8fd1]

SYCL Library

• Implemented accessor member functions swap, byte_size, max_size and
  empty. [f1f907a]
• Implemented SYCL 2020 default accessor constructor. [04928f9]
• Implemented SYCL 2020 accessor iterators. [5b9fd3c] [c7b1a00]
• Changed value_type of read-only accessors to const in accordance with
  SYCL 2020. [227614c]
• Implemented SYCL 2020 multi_ptr and address_space_cast. [8700b76]
  [483984a] [4a9e9a0]
• Implemented SYCL 2020 has_extension free functions. [7f1a6ef]
• Implemented SYCL 2020 aspect_selector. [c0a4a56]
• Implemented new SYCL 2020 style FPGA selectors. [0417651]
• Implemented SYCL 2020 default async_handler behavior. [cd93d8f]
• Implemented SYCL 2020 is_compatible free function. [67f6bba]
• Implemented queue shortcut functions with placeholder accessors. [5ee066e]
• Added support for creating a kernel bundle with descendent devices of the
  passed context's members. [a782779]
• Implemented non-blocking destruction and deferred release of memory objects
  without attached host memory. [894ce25]
• Implemented the sycl_ext_oneapi_queue_priority
  extension. [cdb09dc]
• Implemented the sycl_ext_oneapi_user_defined_reductions
  extension. [8311d79]
• Implemented the sycl_ext_oneapi_queue_empty
  extension proposal. [c493295]
• Implemented the sycl_ext_oneapi_weak_object
  extension. [d948427] [9297f63]
• Implemented the sycl_ext_intel_cslice
  extension. The old behavior that exposed compute slices as sub-sub-devices is
  now deprecated. For compatibility purposes, it can be brought back via the
  SYCL_PI_LEVEL_ZERO_EXPOSE_CSLICE_IN_AFFINITY_PARTITIONING environment
  varible. [5995c618]
• Implemented the sycl_ext_intel_queue_index
  extension. [d2ec964] [7179e83]
• Implemented the sycl_ext_oneapi_memcpy2d
  extension. [516d411]
• Implemented device ID, memory clock rate and bus width information queries
  from the sycl_ext_intel_device_info
  extension. [1d99344] [4f7787c]
• Implemented ext::oneapi::experimental::radix_sorter from the
  sycl_ext_oneapi_group_sort
  extension proposal. [86ba180]
• Implemented a new unified interface for the sycl_ext_oneapi_matrix
  extension for CUDA. [166bbc3]
• Added support for sorting over sub-groups. [168767c]
• Added C++ API wrappers for the Intel math functions ceil, floor, rint,
  sqrt, rsqrt and trunc. [1b7582b]
• Implemented a SYCL device library for bfloat16 Intel math function
  utilities. [fc136d6]
• Added support for range reductions with any number of reduction variables.
  [572bc50]
• Added support for reductions with kernels accepting item. [5d5e9f4]
• Enabled sub-group masks for 64-bit subgroups. [10d50ed]
• Implemented the new non-experimental API for DPAS. [55bf1a0] [1e7a8ea]
• Added 8/16-bit type support to lsc_block_load and lsc_block_store ESIMD
  API. [f9d8059]
• Implemented atomic operation support in the ESIMD emulator. [a6a0dea]
• Added various trivial utility functions for the half type. [b4ce7c0]
• Added type cast functions between half and float/integer types to
  libdevice. [599b1b9]
• Implemented the ONEAPI_DEVICE_SELECTOR environment variable that, in
  addition to supporting SYCL_DEVICE_FILTER syntax, allows to expose GPU
  sub-devices as SYCL root devices and supports negative filters.
  SYCL_DEVICE_FILTER is now deprecated. [28d0cd3] [b21e74e] [77b6f34]
  [6bd5f9c] [6aefd63]
• Added the SYCL_PI_LEVEL_ZERO_SINGLE_ROOT_DEVICE_BUFFER_MIGRATION
  enviornment variable. [bd03e0d]

Documentation

• Added the sycl_ext_oneapi_device_architecture
  extension specification. [7f2b17e]
• Added the sycl_ext_oneapi_memcpy2d
  extension specification. [296e9c3]
• Added the sycl_ext_oneapi_user_defined_reductions
  extension specification. [cd4fd8c]
• Added the sycl_ext_oneapi_weak_object
  extension specification. [d948427]
• Added the sycl_ext_oneapi_prod
  extension proposal. [ed7cb4b]
• Added the sycl_ext_codeplay_kernel_fusion
  extension proposal. [be3dfbd]
• Added the sycl_ext_intel_queue_index
  extension proposal. [f5fb759]
• Added the sycl_ext_intel_cslice
  extension proposal. [5777e1f]
• Added the sycl_ext_oneapi_group_sort
  extension update proposal that introduced sorting functions with fixed-size arrays. [c6d1caf]
• Added device ID, memory clock rate and bus width device information queries to the
  sycl_ext_intel_device_info
  extension. [1d99344][4f7787c]

Improvements

SYCL Compiler

• Added the InferAddressSpaces pass to the SPIR/SPIR-V compilation pipeline,
  reducing the size of the generated device code. [a3ae0dd]
• Redesigned pointer handling so that it no longer decomposes kernel argument
  types containing pointers. [3916d3b] [d55e9c2] [9b02506]
• Kernel lambda operator is now always inlined in the device code entry point
  unless -O0 is used. [b91b732] [2359d94]
• Improved entry point handling in the sycl-post-link tool. [53d9c7b]
• The reqd_work_group_size attribute now works with 1, 2 or 3 operands.
  [4ff42c3]
• Enabled using -fcf-protection option with -fsycl, which results in it
  being applied only to host code compilation and producing a warning. [b6f61f6]
• Linux based compiler driver on Windows now pulls in the sycld debug library
  when msvcrtd is specified as a dependent library. [ebf6c59]
• Added /Zc:__cplusplus as a default option during host compilation with MSVC.
  [e7ed860]
• Improved the ESIMDOptimizeVecArgCallConv optimization pass to cover more IR
  patterns. [4926454]
• Added support for more types in ESIMD lsc functions. [d9e40ec]
• Added error diagnostics for using
  sycl::ext::oneapi::experimental::annotated_arg/ptr as a nested type.
  [321c733]
• The status of bfloat16 support was changed from experimental to supported.
  [7b47ebb]

SYCL Library

• Updated online_compiler with Gen12 GPU support. [adfb1c1]
• get_kernel_bundle and has_kernel_bundle now check that the kernels are
  compatible with the devices. [91b1515]
• Waiting for an event associated with a kernel that uses a stream now also
  waits for the stream to be flushed. [1db0e81]
• Added the requested device type to the message of the exception thrown when no
  such devices are found. [6b83ad7]
• Optimized operator[] of host_accessor. [01e60f7]
• Improved reduction performance on discrete GPUs. [99bdc82]
• Added invoke_simd support for functions with void return type. [3fd0850]
• The Level Zero plugin now creates every event as host-visible by default.
  [f3d245d]
• Added Level Zero plugin support for global work sizes greater than
  UINT32_MAX as long as they are divisible by some legal work-group size and
  the resulting quotient does not exce...