Add no-opt to CTest, make test_shaders.py faster when FXC is missing.

CMakeLists.txt

@@ -128,12 +128,21 @@ if (${PYTHONINTERP_FOUND})
 	add_test(NAME spirv-cross-test
 		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py
 			${CMAKE_CURRENT_SOURCE_DIR}/shaders)
+	add_test(NAME spirv-cross-test-no-opt
+		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py
+			${CMAKE_CURRENT_SOURCE_DIR}/shaders-no-opt)
 	add_test(NAME spirv-cross-test-metal
 		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py --metal
 			${CMAKE_CURRENT_SOURCE_DIR}/shaders-msl)
+	add_test(NAME spirv-cross-test-metal-no-opt
+		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py --metal
+			${CMAKE_CURRENT_SOURCE_DIR}/shaders-msl-no-opt)
 	add_test(NAME spirv-cross-test-hlsl
 		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py --hlsl
 			${CMAKE_CURRENT_SOURCE_DIR}/shaders-hlsl)
+	add_test(NAME spirv-cross-test-hlsl-no-opt
+		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py --hlsl
+			${CMAKE_CURRENT_SOURCE_DIR}/shaders-hlsl-no-opt)
 	add_test(NAME spirv-cross-test-opt
 		COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test_shaders.py --opt
 			${CMAKE_CURRENT_SOURCE_DIR}/shaders)

test_shaders.py

@@ -140,16 +140,20 @@ def shader_to_win_path(shader):
 
     return shader
 
+ignore_fxc = False
 def validate_shader_hlsl(shader):
     subprocess.check_call(['glslangValidator', '-e', 'main', '-D', '--target-env', 'vulkan1.1', '-V', shader])
     is_no_fxc = '.nofxc.' in shader
-    if (not force_no_external_validation) and (not is_no_fxc):
+    global ignore_fxc
+    if (not ignore_fxc) and (not force_no_external_validation) and (not is_no_fxc):
         try:
             win_path = shader_to_win_path(shader)
             subprocess.check_call(['fxc', '-nologo', shader_model_hlsl(shader), win_path])
         except OSError as oe:
             if (oe.errno != os.errno.ENOENT): # Ignore not found errors
                 raise
+            else:
+                ignore_fxc = True
         except subprocess.CalledProcessError:
             print('Failed compiling HLSL shader:', shader, 'with FXC.')
             sys.exit(1)