LLVM  4.0.0
FuzzerRandom.h
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1 //===- FuzzerRandom.h - Internal header for the Fuzzer ----------*- C++ -* ===//
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 // fuzzer::Random
10 //===----------------------------------------------------------------------===//
11 
12 #ifndef LLVM_FUZZER_RANDOM_H
13 #define LLVM_FUZZER_RANDOM_H
14 
15 #include <random>
16 
17 namespace fuzzer {
18 class Random {
19  public:
20  Random(unsigned int seed) : R(seed) {}
21  size_t Rand() { return R(); }
22  size_t RandBool() { return Rand() % 2; }
23  size_t operator()(size_t n) { return n ? Rand() % n : 0; }
25  assert(From < To);
26  intptr_t RangeSize = To - From + 1;
27  return operator()(RangeSize) + From;
28  }
29  std::mt19937 &Get_mt19937() { return R; }
30  private:
31  std::mt19937 R;
32 };
33 
34 } // namespace fuzzer
35 
36 #endif // LLVM_FUZZER_RANDOM_H
Random(unsigned int seed)
Definition: FuzzerRandom.h:20
intptr_t operator()(intptr_t From, intptr_t To)
Definition: FuzzerRandom.h:24
size_t operator()(size_t n)
Definition: FuzzerRandom.h:23
size_t RandBool()
Definition: FuzzerRandom.h:22
std::mt19937 & Get_mt19937()
Definition: FuzzerRandom.h:29
size_t Rand()
Definition: FuzzerRandom.h:21
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())