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llvm-mirror/lib/Support/Hashing.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

29 lines
1.2 KiB
C++

//===-------------- 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;
}