Do not run GPGPU test cases without nvptx target

Tag the GPGPU codegen test cases as unsupported if the nvptx target is not
included in the current llvm build.

Contributed-by:  Yabin Hu <yabin.hwu@gmail.com>
llvm-svn: 208779

polly/test/CMakeLists.txt

@@ -62,7 +62,7 @@ if (NOT DEFINED LLVM_MAIN_SRC_DIR)
 else (NOT DEFINED LLVM_MAIN_SRC_DIR)
 
   set(LLVM_LIT ${LLVM_TOOLS_BINARY_DIR}/llvm-lit)
-  set(POLLY_TEST_DEPS opt LLVMPolly FileCheck not)
+  set(POLLY_TEST_DEPS llvm-config opt LLVMPolly FileCheck not)
 
   set(LLVM_BINARY_DIR "${LLVM_BINARY_DIR}")
   set(LLVM_TOOLS_DIR "${LLVM_TOOLS_BINARY_DIR}")

polly/test/Cloog/CodeGen/GPGPU/2d_innermost_parallel.ll

@@ -1,3 +1,4 @@
+; REQUIRES: nvptx-registered-target
 ; RUN: opt %loadPolly -basicaa -polly-import-jscop -polly-import-jscop-dir=%S -polly-import-jscop-postfix=transformed+gpu -enable-polly-gpgpu -polly-gpgpu-triple=nvptx64-unknown-unknown -polly-codegen < %s -S | FileCheck %s
 
 ;int A[128][128];

polly/test/Cloog/CodeGen/GPGPU/3d_innermost_non_parallel.ll

@@ -1,3 +1,4 @@
+; REQUIRES: nvptx-registered-target
 ; RUN: opt %loadPolly -basicaa -polly-import-jscop -polly-import-jscop-dir=%S -polly-import-jscop-postfix=transformed+gpu -enable-polly-gpgpu -polly-gpgpu-triple=nvptx64-unknown-unknown -polly-codegen < %s -S | FileCheck %s
 
 ;int A[128][128];

polly/test/lit.cfg

@@ -111,3 +111,16 @@ except OSError, why:
 if re.search(r'with assertions', opt_cmd.stdout.read()):
     config.available_features.add('asserts')
 opt_cmd.wait()
+
+try:
+    llvm_config_cmd = subprocess.Popen([os.path.join(llvm_tools_dir,
+                                                     'llvm-config'),
+                                        '--targets-built'],
+                                       stdout = subprocess.PIPE)
+except OSError, why:
+    print "Could not find llvm-config in " + llvm_tools_dir
+    exit(42)
+
+if re.search(r'NVPTX', llvm_config_cmd.stdout.read()):
+    config.available_features.add('nvptx-registered-target')
+llvm_config_cmd.wait()