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The execution mode of a kernel is stored in a global variable, whose value means: - 0 - SPMD mode - 1 - indicates generic mode - 2 - SPMD mode execution with generic mode semantics We are going to add support for SIMD execution mode. It will be come with another execution mode, such as SIMD-generic mode. As a result, this value-based indicator is not flexible. This patch changes to bitset based solution to encode execution mode. Each position is: [0] - generic mode [1] - SPMD mode [2] - SIMD mode (will be added later) In this way, `0x1` is generic mode, `0x2` is SPMD mode, and `0x3` is SPMD mode execution with generic mode semantics. In the future after we add the support for SIMD mode, `0b1xx` will be in SIMD mode. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D110029
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang development mailing list: http://lists.llvm.org/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/