tests: dsp: filtering: exclude on llvm

optimize attribute is not supported by LLVM.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

include/toolchain/llvm.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2021 Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_TOOLCHAIN_LLVM_H_
+#define ZEPHYR_INCLUDE_TOOLCHAIN_LLVM_H_
+
+#ifndef _LINKER
+#if defined(_ASMLANGUAGE)
+
+#include <toolchain/common.h>
+
+#else /* defined(_ASMLANGUAGE) */
+
+#define __no_optimization __attribute__((optnone))
+
+#include <toolchain/gcc.h>
+#endif /* _ASMLANGUAGE */
+
+#endif /* !_LINKER */
+
+#endif /* ZEPHYR_INCLUDE_TOOLCHAIN_LLVM_H_ */

tests/lib/cmsis_dsp/filtering/testcase.yaml

@@ -6,6 +6,7 @@ common:
     - mps2_an521
     - native_posix
   tags: cmsis_dsp
+  toolchain_exclude: llvm
 
 tests:
   libraries.cmsis_dsp.filtering: