llvm-project

History

Hansang Bae 3da61ddae7 [OpenMP] Define omp_is_initial_device() variants in omp.h omp_is_initial_device() is marked as a built-in function in the current compiler, and user code guarded by this call may be optimized away, resulting in undesired behavior in some cases. This patch provides a possible fix for such cases by defining the routine as a variant function and removing it from builtin list. Differential Revision: https://reviews.llvm.org/D99447		2021-04-06 16:58:01 -05:00
..
cmake/Modules	[OpenMP][NVPTX] Refined CMake logic to choose compute capabilites	2021-01-30 15:14:48 -05:00
deviceRTLs	Revert "[libomptarget] Build amdgcn devicertl by default"	2021-03-17 11:34:44 +00:00
include	[libomptarget] Add allocator support for target memory	2021-03-13 03:47:07 -08:00
plugins	[OpenMP] Trim error messages in CUDA plugin	2021-03-29 12:20:19 -04:00
src	[OpenMP][NFC] Fix typo in libomptarget error message	2021-04-01 12:45:28 -04:00
test	[OpenMP] Define omp_is_initial_device() variants in omp.h	2021-04-06 16:58:01 -05:00
CMakeLists.txt	[OpenMP][Libomptarget] Fix check-libomptarget	2021-01-27 06:46:40 -08:00
README.txt	Unify build documentation and convert to reStructuredText	2017-12-27 09:15:10 +00:00

README.txt

    README for the LLVM* OpenMP* Offloading Runtime Library (libomptarget)
    ======================================================================

How to Build the LLVM* OpenMP* Offloading Runtime Library (libomptarget)
========================================================================
In-tree build:

$ cd where-you-want-to-live
Check out openmp (libomptarget lives under ./libomptarget) into llvm/projects
$ cd where-you-want-to-build
$ mkdir build && cd build
$ cmake path/to/llvm -DCMAKE_C_COMPILER=<C compiler> -DCMAKE_CXX_COMPILER=<C++ compiler>
$ make omptarget

Out-of-tree build:

$ cd where-you-want-to-live
Check out openmp (libomptarget lives under ./libomptarget)
$ cd where-you-want-to-live/openmp/libomptarget
$ mkdir build && cd build
$ cmake path/to/openmp -DCMAKE_C_COMPILER=<C compiler> -DCMAKE_CXX_COMPILER=<C++ compiler>
$ make

For details about building, please look at README.rst in the parent directory.

Architectures Supported
=======================
The current library has been only tested in Linux operating system and the
following host architectures:
* Intel(R) 64 architecture
* IBM(R) Power architecture (big endian)
* IBM(R) Power architecture (little endian)
* ARM(R) AArch64 architecture (little endian)

The currently supported offloading device architectures are:
* Intel(R) 64 architecture (generic 64-bit plugin - mostly for testing purposes)
* IBM(R) Power architecture (big endian) (generic 64-bit plugin - mostly for testing purposes)
* IBM(R) Power architecture (little endian) (generic 64-bit plugin - mostly for testing purposes)
* ARM(R) AArch64 architecture (little endian) (generic 64-bit plugin - mostly for testing purposes)
* CUDA(R) enabled 64-bit NVIDIA(R) GPU architectures

Supported RTL Build Configurations
==================================
Supported Architectures: Intel(R) 64, IBM(R) Power 7 and Power 8

              ---------------------------
              |   gcc      |   clang    |
--------------|------------|------------|
| Linux* OS   |  Yes(1)    |  Yes(2)    |
-----------------------------------------

(1) gcc version 4.8.2 or later is supported.
(2) clang version 3.7 or later is supported.


Front-end Compilers that work with this RTL
===========================================

The following compilers are known to do compatible code generation for
this RTL:
  - clang (from https://github.com/clang-ykt )
  - clang (development branch at http://clang.llvm.org - several features still
    under development)

-----------------------------------------------------------------------

Notices
=======
This library and related compiler support is still under development, so the
employed interface is likely to change in the future.

*Other names and brands may be claimed as the property of others.