[polly] r334233 - Back out of GPU Codegen if NVPTX is not available

[Philip Pfaffe via llvm-commits]

Author: pfaffe
Date: Thu Jun  7 14:10:49 2018
New Revision: 334233

URL: http://llvm.org/viewvc/llvm-project?rev=334233&view=rev
Log:
Back out of GPU Codegen if NVPTX is not available

Summary:
When enabling GPU codegen in polly, CMake will fail if NVPTX is not a target
supported by the LLVM polly is being built against. In that case, GPU codegen
should be switched off.

Reviewers: Meinersbur, grosser, bollu

Reviewed By: Meinersbur

Subscribers: mgorny, bollu, pollydev, llvm-commits

Differential Revision: https://reviews.llvm.org/D47888

Modified:
    polly/trunk/CMakeLists.txt

Modified: polly/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/CMakeLists.txt?rev=334233&r1=334232&r2=334233&view=diff
==============================================================================
--- polly/trunk/CMakeLists.txt (original)
+++ polly/trunk/CMakeLists.txt Thu Jun  7 14:10:49 2018
@@ -97,14 +97,17 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PAT
 SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 option(POLLY_ENABLE_GPGPU_CODEGEN "Enable GPGPU code generation feature" OFF)
+set(GPU_CODEGEN FALSE)
 if (POLLY_ENABLE_GPGPU_CODEGEN)
   # Do not require CUDA/OpenCL, as GPU code generation test cases can be run
   # without a CUDA/OpenCL library.
-  FIND_PACKAGE(CUDA)
-  FIND_PACKAGE(OpenCL)
-  set(GPU_CODEGEN TRUE)
-else(POLLY_ENABLE_GPGPU_CODEGEN)
-  set(GPU_CODEGEN FALSE)
+  if ("NVPTX" IN_LIST LLVM_TARGETS_TO_BUILD)
+    FIND_PACKAGE(CUDA)
+    FIND_PACKAGE(OpenCL)
+    set(GPU_CODEGEN TRUE)
+  else()
+    message(WARNING "The LLVM NVPTX target is required for GPU code generation")
+  endif()
 endif(POLLY_ENABLE_GPGPU_CODEGEN)