Revert "Random Number Generator (llvm)"

[oota-llvm.git] / lib / Support / RandomNumberGenerator.cpp

diff --git a/lib/Support/RandomNumberGenerator.cpp b/lib/Support/RandomNumberGenerator.cpp
deleted file mode 100644 (file)
index 5513982..0000000
--- 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);
-}