[StreamExecutor] Add basic Stream operations

Summary: Add the Stream class and a few of the operations it supports.

Reviewers: jlebar, tra

Subscribers: jprice, parallel_libs-commits

Differential Revision: https://reviews.llvm.org/D23333

llvm-svn: 278829
GitOrigin-RevId: 68b97c7dc94b78a1752b67106464f48819cc341e
16 files changed
tree: fe5da89f39b74a93653e197c3c8536f57537eb43
  1. .arcconfig
  2. .clang-format
  3. README.rst
  4. streamexecutor/