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 18 using 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. 23 size_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. 27 void llvm::set_fixed_execution_hash_seed(size_t fixed_value) { 28 hashing::detail::fixed_seed_override = fixed_value; 29 } 30
