Reverting r357901 as fails to build on some of the buildbots

llvm-svn: 357902

2 files changed, 0 insertions, 69 deletions

diff --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index 7dfa97c5356..c5846ad6c81 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -76,7 +76,6 @@ add_llvm_library(LLVMSupport
   CodeGenCoverage.cpp
   CommandLine.cpp
   Compression.cpp
-  CRC.cpp
   ConvertUTF.cpp
   ConvertUTFWrapper.cpp
   CrashRecoveryContext.cpp
diff --git a/llvm/lib/Support/CRC.cpp b/llvm/lib/Support/CRC.cpp
deleted file mode 100644
index 6f8edf6d484..00000000000
--- a/llvm/lib/Support/CRC.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-//===--- CRC.cpp - Cyclic Redundancy Check implementation -----------------===//
-//
-// 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 implements llvm::crc32 function.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/CRC.h"
-#include "llvm/Config/config.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/Threading.h"
-#include <array>
-
-using namespace llvm;
-
-#if LLVM_ENABLE_ZLIB == 0 || !HAVE_ZLIB_H
-using CRC32Table = std::array<uint32_t, 256>;
-
-static void initCRC32Table(CRC32Table &Tbl) {
-  auto Shuffle = [](uint32_t V) {
-    return (V & 1) ? (V >> 1) ^ 0xEDB88320U : V >> 1;
-  };
-
-  for (size_t I = 0; I < Tbl.size(); ++I) {
-    uint32_t V = Shuffle(I);
-    V = Shuffle(V);
-    V = Shuffle(V);
-    V = Shuffle(V);
-    V = Shuffle(V);
-    V = Shuffle(V);
-    V = Shuffle(V);
-    Tbl[I] = Shuffle(V);
-  }
-}
-
-uint32_t llvm::crc32(uint32_t CRC, StringRef S) {
-  static llvm::once_flag InitFlag;
-  static CRC32Table Tbl;
-  llvm::call_once(InitFlag, initCRC32Table, Tbl);
-
-  const uint8_t *P = reinterpret_cast<const uint8_t *>(S.data());
-  size_t Len = S.size();
-  CRC ^= 0xFFFFFFFFU;
-  for (; Len >= 8; Len -= 8) {
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-  }
-  while (Len--)
-    CRC = Tbl[(CRC ^ *P++) & 0xFF] ^ (CRC >> 8);
-  return CRC ^ 0xFFFFFFFFU;
-}
-#else
-#include <zlib.h>
-uint32_t llvm::crc32(uint32_t CRC, StringRef S) {
-  return ::crc32(CRC, (const Bytef *)S.data(), S.size());
-}
-#endif