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1 //===- subzero/src/IceRNG.h - Random number generator -----------*- C++ -*-===// | 1 //===- subzero/src/IceRNG.h - Random number generator -----------*- C++ -*-===// |
2 // | 2 // |
3 // The Subzero Code Generator | 3 // The Subzero Code Generator |
4 // | 4 // |
5 // This file is distributed under the University of Illinois Open Source | 5 // This file is distributed under the University of Illinois Open Source |
6 // License. See LICENSE.TXT for details. | 6 // License. See LICENSE.TXT for details. |
7 // | 7 // |
8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
9 // | 9 // |
10 // This file declares a random number generator. | 10 // This file declares a random number generator. |
11 // | 11 // |
12 //===----------------------------------------------------------------------===// | 12 //===----------------------------------------------------------------------===// |
13 | 13 |
14 #ifndef SUBZERO_SRC_ICERNG_H | 14 #ifndef SUBZERO_SRC_ICERNG_H |
15 #define SUBZERO_SRC_ICERNG_H | 15 #define SUBZERO_SRC_ICERNG_H |
16 | 16 |
17 #include <cstdint> | 17 #include <cstdint> |
18 | 18 |
19 #include "llvm/ADT/StringRef.h" | 19 #include "llvm/ADT/StringRef.h" |
20 #include "llvm/Support/Compiler.h" | 20 #include "llvm/Support/Compiler.h" |
21 | 21 |
22 namespace Ice { | 22 namespace Ice { |
23 | 23 |
24 class RandomNumberGenerator { | 24 class RandomNumberGenerator { |
| 25 RandomNumberGenerator() = delete; |
25 RandomNumberGenerator(const RandomNumberGenerator &) = delete; | 26 RandomNumberGenerator(const RandomNumberGenerator &) = delete; |
26 RandomNumberGenerator &operator=(const RandomNumberGenerator &) = delete; | 27 RandomNumberGenerator &operator=(const RandomNumberGenerator &) = delete; |
27 | 28 |
28 public: | 29 public: |
29 RandomNumberGenerator(llvm::StringRef Salt); | 30 explicit RandomNumberGenerator(llvm::StringRef Salt); |
30 uint64_t next(uint64_t Max); | 31 uint64_t next(uint64_t Max); |
31 | 32 |
32 private: | 33 private: |
33 uint64_t State; | 34 uint64_t State; |
34 }; | 35 }; |
35 | 36 |
36 // This class adds additional random number generator utilities. The | 37 // This class adds additional random number generator utilities. The |
37 // reason for the wrapper class is that we want to keep the | 38 // reason for the wrapper class is that we want to keep the |
38 // RandomNumberGenerator interface identical to LLVM's. | 39 // RandomNumberGenerator interface identical to LLVM's. |
39 class RandomNumberGeneratorWrapper { | 40 class RandomNumberGeneratorWrapper { |
| 41 RandomNumberGeneratorWrapper() = delete; |
40 RandomNumberGeneratorWrapper(const RandomNumberGeneratorWrapper &) = delete; | 42 RandomNumberGeneratorWrapper(const RandomNumberGeneratorWrapper &) = delete; |
41 RandomNumberGeneratorWrapper & | 43 RandomNumberGeneratorWrapper & |
42 operator=(const RandomNumberGeneratorWrapper &) = delete; | 44 operator=(const RandomNumberGeneratorWrapper &) = delete; |
43 | 45 |
44 public: | 46 public: |
45 uint64_t operator()(uint64_t Max) { return RNG.next(Max); } | 47 uint64_t operator()(uint64_t Max) { return RNG.next(Max); } |
46 bool getTrueWithProbability(float Probability); | 48 bool getTrueWithProbability(float Probability); |
47 RandomNumberGeneratorWrapper(RandomNumberGenerator &RNG) : RNG(RNG) {} | 49 explicit RandomNumberGeneratorWrapper(RandomNumberGenerator &RNG) |
| 50 : RNG(RNG) {} |
48 | 51 |
49 private: | 52 private: |
50 RandomNumberGenerator &RNG; | 53 RandomNumberGenerator &RNG; |
51 }; | 54 }; |
52 | 55 |
53 } // end of namespace Ice | 56 } // end of namespace Ice |
54 | 57 |
55 #endif // SUBZERO_SRC_ICERNG_H | 58 #endif // SUBZERO_SRC_ICERNG_H |
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