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SYCL* Compiler and Runtimes 2019-08

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@tfzhu tfzhu released this 15 Aug 00:51
· 264451 commits to sycl since this release
2019-08
c557eb7

Description

The SYCL* Compiler compiles C++-based SYCL source files with code for both CPU and a wide range of compute accelerators. The compiler uses Khronos* OpenCL™ API to offload computations to accelerators.
This update includes:

New features

  • Support for image accessor has been landed.
  • Added support for unnamed lambda kernels, so parallel_for works without
    specifying "Kernel Name" type. This can be enabled by passing
    -fsycl-unnamed-lambda option.
  • Kernel to kernel blocking and non-blocking pipe feature is implemented.
  • Added support for Unified Shared Memory (USM).

Improvements

  • Now clCreateSampler sampler is used for all version of OpenCL implementation.
  • Added Intel FPGA specific command line interfaces for ahead of time
    compilation.
  • FPGA memory attributes are now supported for static variables.
  • Hierarchical parallelism is improved to pass conformance tests.
  • private_memory class has been implemented.
  • sycl.lib is automatically linked with -fsycl switch on Windows.
  • Added support for Windows getOSModuleHandle.
  • Functions with variadic arguments doesn't trigger compiler diagnostic about
    calling convention.
  • Added experimental support for building and linking SYCL runtime with libc++
    library instead of libstdc++.
  • Adjusted array and vec classes so they are more efficient for FPGA devices.
  • Exception will be thrown on attempt to create image accessor for the device
    which doesn't support images.
  • Use llvm-objcopy for merging device and host objects instead of doing
    partial linking.
  • Check if online compiler is available before building the program.
  • clCreateProgramWithILKHR is used if OpenCL implementation supports
    cl_khr_il_program extension.
  • Reuse the pointer provided by the user in the buffer constructor (even if
    use_host_ptr property isn't specified) if its alignment is sufficient.
  • -Ldir now can be used to find libraries with -foffload-static-lib
  • max_concurrency FPGA loop attribute now accepts zero.
  • Ignore incorrectly used FPGA loop attribute emitting user friendly warning
    instead of compiler error.
  • Added depends_on methods of handler class which can be used to provide
    additional dependency for a command group.
  • SYCL implementation can now be built on Windows using Visual Studio 2017 or
    higher.

Bug fixes

  • Fixed assertion failure when use -save-temps option along with -fsycl.
  • Cached JITed programs are now released during destruction of context they
    are bound to, earlier release happened during a process shutdown.
  • Fixed get_linear_id method of group class, now it calculate according to
    row-major ordering.
  • Removed printing of error messages to stderr before throwing an exception.
  • Explicit copy API of the handler class is asynchronous again.
  • fill method of handler class now takes element size into account.
  • Fixed bug with ignored several FPGA loop attributes in case of argument is 1.
  • Fixed bug which prevented FPGA loop attributes work with infinite loops.
  • Fixed problem which caused invalid/redundant memory copy operations to be
    generated.
  • The commands created by Scheduler now cleaned up on destruction of
    corresponding SYCL memory objects (buffer, image).
  • 1 dimensional sub buffer is passed as cl_mem obtained by calling
    clCreateSubBuffer when kernel is built from OpenCL C source.
  • Now copy of entire memory is performed when data is needed in new context even
    if user requests accesses to only part of the memory.
  • Fixed problem with one element vec objects relation/logical operation which
    was working like scalar.
  • Type casting and conditional operator (ternary 'if') with pointers now working
    correctly.
  • The problem with calling inlined kernel from multiple TUs is fixed.
  • Fixed compiler warnings for Intel FPGA attributes on host compilation.
  • [TODO] Fix implementation of vec class for half
  • Fixed buffer constructor which takes host data as shared_ptr. Now it increments
    shared_ptr reference counter and reuses provided memory if possible.
  • Fixed a bug with nd_item.barrier not respecting fence_space flag

Experimental Intel(R) CPU Runtime for OpenCL™ Applications with SYCL support version 2019.8.7.0.0725_rel

  • Minor bugfixes.

GPU target prerequisite

See Release notes for more details on previous releases.

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