[PATCH] D44984: [HIP] Add hip file type and codegen for kernel launching

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: rjmccall.
Herald added a subscriber: tpr.

HIP is a language similar to CUDA (https://github.com/ROCm-Developer-Tools/HIP/blob/master/docs/markdown/hip_kernel_language.md ).
The language syntax is very similar, which allows a hip program to be compiled as a CUDA program by Clang. The main difference
is the host API. HIP has a set of vendor neutral host API which can be implemented on different platforms. Currently there is open source
implementation of HIP runtime on amdgpu target (https://github.com/ROCm-Developer-Tools/HIP).

This patch adds support of file type hip and language option HIP.

When hip file is compiled, both LangOpts.CUDA and LangOpts.HIP is turned on. This allows compilation of hip program as CUDA
in most cases and only special handling of hip program is needed LangOpts.HIP is checked.

This patch also adds support of kernel launching of HIP program using HIP host API.

When -x hip is not specified, there is no behaviour change for CUDA.

Patch by Greg Rodgers.
Lit test added by Yaxun Liu.


https://reviews.llvm.org/D44984

Files:
  include/clang/Basic/LangOptions.def
  lib/CodeGen/CGCUDANV.cpp
  lib/Frontend/CompilerInvocation.cpp
  lib/Frontend/InitPreprocessor.cpp
  lib/Sema/SemaCUDA.cpp
  lib/Sema/SemaDecl.cpp
  test/CodeGenCUDA/Inputs/cuda.h
  test/CodeGenCUDA/device-stub.cu
  test/CodeGenCUDA/kernel-call.cu

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