From 02b4e6e7ab1ad79336d9f23f3644c90aecc8457a Mon Sep 17 00:00:00 2001
From: JF Bastien <jfb@google.com>
Date: Wed, 18 Jun 2014 06:33:23 +0000
Subject: Revert "Random Number Generator (llvm)"

This reverts commit cccba093090d127e0b6d17473b14c264c14c5259.

It causes build breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211146 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/CMakeLists.txt            |  1 -
 lib/Support/RandomNumberGenerator.cpp | 52 -----------------------------------
 2 files changed, 53 deletions(-)
 delete mode 100644 lib/Support/RandomNumberGenerator.cpp

(limited to 'lib/Support')

diff --git a/lib/Support/CMakeLists.txt b/lib/Support/CMakeLists.txt
index eac95c262b..2438d729d8 100644
--- a/lib/Support/CMakeLists.txt
+++ b/lib/Support/CMakeLists.txt
@@ -41,7 +41,6 @@ add_llvm_library(LLVMSupport
   MD5.cpp
   PluginLoader.cpp
   PrettyStackTrace.cpp
-  RandomNumberGenerator.cpp
   Regex.cpp
   SmallPtrSet.cpp
   SmallVector.cpp
diff --git a/lib/Support/RandomNumberGenerator.cpp b/lib/Support/RandomNumberGenerator.cpp
deleted file mode 100644
index 5513982e7b..0000000000
--- a/lib/Support/RandomNumberGenerator.cpp
+++ /dev/null
@@ -1,52 +0,0 @@
-//===-- RandomNumberGenerator.cpp - Implement RNG class -------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements random number generation (RNG).
-// The current implementation is NOT cryptographically secure as it uses
-// the C++11 <random> facilities.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "rng"
-#include "llvm/Support/RandomNumberGenerator.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-
-using namespace llvm;
-
-// Tracking BUG: 19665
-// http://llvm.org/bugs/show_bug.cgi?id=19665
-//
-// Do not change to cl::opt<uint64_t> since this silently breaks argument parsing.
-static cl::opt<unsigned long long>
-Seed("rng-seed", cl::value_desc("seed"),
-     cl::desc("Seed for the random number generator"), cl::init(0));
-
-RandomNumberGenerator::RandomNumberGenerator(StringRef Salt) {
-  DEBUG(
-    if (Seed == 0)
-      errs() << "Warning! Using unseeded random number generator.\n"
-  );
-
-  // Combine seed and salt using std::seed_seq.
-  // Entropy: Seed-low, Seed-high, Salt...
-  size_t Size = Salt.size() + 2;
-  uint32_t Data[Size];
-  Data[0] = Seed;
-  Data[1] = Seed >> 32;
-  std::copy_n(Salt.begin(), Salt.size(), Data + 2);
-
-  std::seed_seq SeedSeq(Data, Data + Size);
-  Generator.seed(SeedSeq);
-}
-
-uint64_t RandomNumberGenerator::next(uint64_t Max) {
-  std::uniform_int_distribution<uint64_t> distribution(0, Max - 1);
-  return distribution(Generator);
-}
-- 
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