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| -rw-r--r-- | src/compiler-support.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/compiler-support.h b/src/compiler-support.h new file mode 100644 index 000000000..f0ec62535 --- /dev/null +++ b/src/compiler-support.h @@ -0,0 +1,38 @@ +/* + * Copyright 2015 WebAssembly Community Group participants + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __compiler_support_h__ +#define __compiler_support_h__ + +#ifndef __has_feature +# define __has_feature(x) 0 +#endif + +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif + +// If control flow reaches the point of the WASM_UNREACHABLE(), the program is +// undefined. +#if __has_builtin(__builtin_unreachable) +# define WASM_UNREACHABLE() __builtin_unreachable() +#elif defined(_MSC_VER) +# define WASM_UNREACHABLE() __assume(false) +#else +# define WASM_UNREACHABLE() abort() +#endif + +#endif // __compiler_support_h__ |