GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 100.0% 45 / 0 / 45
Functions: 100.0% 6 / 0 / 6
Branches: 100.0% 6 / 0 / 6
src/util/CustomHashFunctions.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "CustomHashFunctions.h"
4
5 #include <numeric>
6 #include <string>
7
8 #include <symboltablebuilder/Type.h>
9 #include <symboltablebuilder/TypeChain.h>
10
11 namespace spice::compiler {
12
13 76686881 uint64_t hashMix(uint64_t hash) noexcept {
14 76686881 hash += 0x9e3779b97f4a7c15ull;
15 76686881 hash = (hash ^ (hash >> 30)) * 0xbf58476d1ce4e5b9ull;
16 76686881 hash = (hash ^ (hash >> 27)) * 0x94d049bb133111ebull;
17 76686881 hash ^= (hash >> 31);
18 76686881 return hash;
19 }
20
21 59301837 void hashCombine64(uint64_t &hash, uint64_t value) noexcept {
22 59301837 hash ^= hashMix(value + 0x9e3779b97f4a7c15ull + (hash << 6) + (hash >> 2));
23 59301837 }
24
25 } // namespace spice::compiler
26
27 namespace std {
28
29 7942620 size_t hash<spice::compiler::TypeChainElement>::operator()(const spice::compiler::TypeChainElement &tce) const noexcept {
30 using namespace spice::compiler;
31 7942620 uint64_t hash = 0;
32
33 7942620 hashCombine64(hash, tce.superType);
34 7942620 hashCombine64(hash, std::hash<std::string>{}(tce.subType));
35 7942620 hashCombine64(hash, tce.typeId);
36
37
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✓ Branch 6 → 9 taken 95742 times.
✓ Branch 6 → 14 taken 763744 times.
✓ Branch 6 → 17 taken 7082149 times.
 7942620 switch (tce.superType) {
38 985 case TY_ARRAY:
39 985 hashCombine64(hash, tce.data.arraySize);
40 985 break;
41 95742 case TY_FUNCTION:
42 case TY_PROCEDURE:
43
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✓ Branch 9 → 10 taken 244 times.
✓ Branch 9 → 11 taken 95498 times.
 95742 hashCombine64(hash, tce.data.hasCaptures ? 0xF00D1234ULL : 0xBAD0C0DEULL);
44 95742 break;
45 763744 case TY_STRUCT:
46 case TY_INTERFACE:
47 case TY_ENUM:
48 // Stable hash based on pointer identity, but randomized for safety
49 763744 hashCombine64(hash, hashPointer(tce.data.bodyScope));
50 763744 break;
51 7082149 default:
52 7082149 break;
53 }
54
55 7942620 hashCombine64(hash, hashVector(tce.templateTypes));
56 7942620 hashCombine64(hash, hashVector(tce.paramTypes));
57
58 7942620 return hashMix(hash);
59 }
60
61 7771854 size_t hash<spice::compiler::Type>::operator()(const spice::compiler::Type &t) const noexcept {
62 using namespace spice::compiler;
63 7771854 uint64_t hash = 0;
64 7771854 hashCombine64(hash, hashVector(t.typeChain));
65 7771854 return hashMix(hash);
66 }
67
68 835285 size_t hash<spice::compiler::TypeQualifiers>::operator()(const spice::compiler::TypeQualifiers &qualifiers) const noexcept {
69 using namespace spice::compiler;
70 835285 const uint8_t bits = (qualifiers.isConst << 0) | (qualifiers.isSigned << 1) | (qualifiers.isUnsigned << 2) |
71 835285 (qualifiers.isHeap << 3) | (qualifiers.isPublic << 4) | (qualifiers.isInline << 5) |
72 835285 (qualifiers.isComposition << 6);
73 835285 return hashMix(bits);
74 }
75
76 835285 size_t hash<spice::compiler::QualType>::operator()(const spice::compiler::QualType &qualType) const noexcept {
77 using namespace spice::compiler;
78 835285 uint64_t seed = 0;
79
80 // Hash type pointer content if possible
81 835285 hashCombine64(seed, std::hash<Type>{}(*qualType.getType()));
82
83 835285 TypeQualifiers qualifiers = qualType.getQualifiers();
84 835285 qualifiers.isPublic = false; // Ignore the public qualifier for hashing
85 835285 hashCombine64(seed, std::hash<TypeQualifiers>{}(qualifiers));
86 835285 return hashMix(seed);
87 }
88
89 } // namespace std
90