| /* |
| * 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 wasm_compiler_support_h |
| #define wasm_compiler_support_h |
| |
| #ifndef __has_feature |
| #define __has_feature(x) 0 |
| #endif |
| |
| #ifndef __has_builtin |
| #define __has_builtin(x) 0 |
| #endif |
| |
| #if __has_builtin(__builtin_unreachable) |
| #define WASM_BUILTIN_UNREACHABLE __builtin_unreachable() |
| #elif defined(_MSC_VER) |
| #define WASM_BUILTIN_UNREACHABLE __assume(false) |
| #endif |
| |
| #ifdef __GNUC__ |
| #define WASM_NORETURN __attribute__((noreturn)) |
| #elif defined(_MSC_VER) |
| #define WASM_NORETURN __declspec(noreturn) |
| #else |
| #define WASM_NORETURN |
| #endif |
| |
| // The code might contain TODOs or stubs that read some values but do nothing |
| // with them. The compiler might fail with [-Werror,-Wunused-variable]. |
| // The WASM_UNUSED(varible) is a wrapper that helps to suppress the error. |
| #define WASM_UNUSED(expr) \ |
| do { \ |
| if (sizeof expr) { \ |
| (void)0; \ |
| } \ |
| } while (0) |
| |
| #endif // wasm_compiler_support_h |