From e3fc22ad99cda4035e2a65b99a48f91b88ff3429 Mon Sep 17 00:00:00 2001 From: Anastasia Stulova Date: Mon, 15 Aug 2016 16:28:10 +0000 Subject: [PATCH] OpenCL release notes git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_39@278677 91177308-0d34-0410-b5e6-96231b3b80d8 --- docs/ReleaseNotes.rst | 47 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index 68b77f6b63..fc54326bf7 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -191,7 +191,52 @@ Objective-C Language Changes in Clang OpenCL C Language Changes in Clang ---------------------------------- -... +Clang now has support for all OpenCL 2.0 features. In particular, the following +features have been completed since the previous release: + +- Pipe builtin functions (s6.13.16.2-4). +- Address space conversion functions ``to_{global/local/private}``. +- ``nosvm`` attribute support. +- Improved diagnostic and generation of Clang Blocks used in OpenCL kernel code. +- ``opencl_unroll_hint`` pragma. + +Several miscellaneous improvements have been made: + +- Supported extensions are now part of the target representation to give correct + diagnostics for unsupported target features during compilation. For example, + when compiling for a target that does not support the double precision + floating point extension, Clang will give an error when encountering the + ``cl_khr_fp64`` pragma. Several missing extensions were added covering up to + and including OpenCL 2.0. +- Clang now comes with the OpenCL standard headers declaring builtin types and + functions up to and including OpenCL 2.0 in ``lib/Headers/opencl-c.h``. By + default, Clang will not include this header. It can be included either using + the regular ``-I`` directive or (if the default one + from installation is to be used) using the ``-finclude-default-header`` + frontend flag. + + Example: + + .. code-block:: none + + echo "bool is_wg_uniform(int i){return get_enqueued_local_size(i)==get_local_size(i);}" > test.cl + clang -cc1 -finclude-default-header -cl-std=CL2.0 test.cl + + All builtin function declarations from OpenCL 2.0 will be automatically + visible in test.cl. +- Image types have been improved with better diagnostics for access qualifiers. + Images with one access qualifier type cannot be used in declarations for + another type. Also qualifiers are now propagated from the frontend down to + libraries and backends. +- Diagnostic improvements for OpenCL types, address spaces and vectors. +- Half type literal support has been added. For example, ``1.0h`` represents a + floating point literal in half precision, i.e., the value ``0xH3C00``. +- The Clang driver now accepts OpenCL compiler options ``-cl-*`` (following the + OpenCL Spec v1.1-1.2 s5.8). For example, the ``-cl-std=CL1.2`` option from the + spec enables compilation for OpenCL 1.2, or ``-cl-mad-enable`` will enable + fusing multiply-and-add operations. +- Clang now uses function metadata instead of module metadata to propagate + information related to OpenCL kernels e.g. kernel argument information. OpenMP Support in Clang ---------------------------------- -- 2.40.0