[MLIR] Add a tests for out of tree dialect example.

[stephenneuendorffer]

Summary

This attempts to ensure that out of tree usage remains stable.

[stephenneuendorffer]

If there are no objections, I plan to land this.

[jroelofs]

mlir/test/Examples/standalone/test.toy

2

Should this be tee %t so there's no chance of collisions with other tests writing to the same generically-named file?

mlir/test/lit.site.cfg.py.in

26

I think you want "@CMAKE_COMMAND@"

mlir/test/Examples/standalone/lit.local.cfg

+config.substitutions.append(("%cmake", config.host_cmake))
+config.substitutions.append(("%host_cxx", config.host_cxx))
+config.substitutions.append(("%host_cc", config.host_cc))

mlir/test/Examples/standalone/test.toy

+# RUN: %cmake %mlir_src_root/examples/standalone -DCMAKE_CXX_COMPILER=%host_cxx -DCMAKE_C_COMPILER=%host_cc -DMLIR_DIR=%llvm_lib_dir/cmake/mlir ; %cmake --build . --target check-standalone-opt | tee %t | FileCheck %s
+
+# CHECK: Expected Passes: 1
+# UNSUPPORTED: windows, android

mlir/test/lit.cfg.py

 # test_source_root: The root path where tests are located.
 config.test_source_root = os.path.dirname(__file__)
 
 # test_exec_root: The root path where tests should be run.
 config.test_exec_root = os.path.join(config.mlir_obj_root, 'test')
 
 config.substitutions.append(('%PATH%', config.environment['PATH']))
 config.substitutions.append(('%shlibext', config.llvm_shlib_ext))
+config.substitutions.append(("%mlir_src_root", config.mlir_src_root))
 
 llvm_config.with_system_environment(
     ['HOME', 'INCLUDE', 'LIB', 'TMP', 'TEMP'])
 
 llvm_config.use_default_substitutions()
 
 # excludes: A list of directories to exclude from the testsuite. The 'Inputs'
 # subdirectories contain auxiliary inputs for various tests in their parent

mlir/test/lit.site.cfg.py.in

 config.enable_shared = @ENABLE_SHARED@
 config.enable_assertions = @ENABLE_ASSERTIONS@
 config.targets_to_build = "@TARGETS_TO_BUILD@"
 config.native_target = "@LLVM_NATIVE_ARCH@"
 config.llvm_bindings = "@LLVM_BINDINGS@".split(' ')
 config.host_os = "@HOST_OS@"
 config.host_cc = "@HOST_CC@"
 config.host_cxx = "@HOST_CXX@"
+config.host_cmake = "@CMAKE_COMMAND@"
 # Note: ldflags can contain double-quoted paths, so must use single quotes here.
 config.host_ldflags = '@HOST_LDFLAGS@'
 config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.llvm_host_triple = '@LLVM_HOST_TRIPLE@'
 config.host_arch = "@HOST_ARCH@"
 config.mlir_src_root = "@MLIR_SOURCE_DIR@"
 config.mlir_obj_root = "@MLIR_BINARY_DIR@"
 config.mlir_runner_utils_dir = "@MLIR_RUNNER_UTILS_DIR@"