1//===-------------- lib/Support/Hashing.cpp -------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file provides implementation bits for the LLVM common hashing 11// infrastructure. Documentation and most of the other information is in the 12// header file. 13// 14//===----------------------------------------------------------------------===// 15 16#include "llvm/ADT/Hashing.h" 17 18using namespace llvm; 19 20// Provide a definition and static initializer for the fixed seed. This 21// initializer should always be zero to ensure its value can never appear to be 22// non-zero, even during dynamic initialization. 23size_t llvm::hashing::detail::fixed_seed_override = 0; 24 25// Implement the function for forced setting of the fixed seed. 26// FIXME: Use atomic operations here so that there is no data race. 27void llvm::set_fixed_execution_hash_seed(size_t fixed_value) { 28 hashing::detail::fixed_seed_override = fixed_value; 29} 30