| //===-------------- lib/Support/Hashing.cpp -------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides implementation bits for the LLVM common hashing |
| // infrastructure. Documentation and most of the other information is in the |
| // header file. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/Hashing.h" |
| |
| using namespace llvm; |
| |
| // Provide a definition and static initializer for the fixed seed. This |
| // initializer should always be zero to ensure its value can never appear to be |
| // non-zero, even during dynamic initialization. |
| uint64_t llvm::hashing::detail::fixed_seed_override = 0; |
| |
| // Implement the function for forced setting of the fixed seed. |
| // FIXME: Use atomic operations here so that there is no data race. |
| void llvm::set_fixed_execution_hash_seed(uint64_t fixed_value) { |
| hashing::detail::fixed_seed_override = fixed_value; |
| } |
