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Add a hashing function for state and symbolic variables.
Signed-off-by: fruffy <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| #include "ir/ir.h" | ||
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| namespace IR { | ||
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| namespace { | ||
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| int compare(const Expression *e1, const Expression *e2); | ||
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| int compare(const Member *m1, const Member *m2) { | ||
| auto result = compare(m1->expr, m2->expr); | ||
| if (result != 0) { | ||
| return result; | ||
| } | ||
| if (m1->member.name < m2->member.name) { | ||
| return -1; | ||
| } | ||
| if (m1->member.name > m2->member.name) { | ||
| return 1; | ||
| } | ||
| return 0; | ||
| } | ||
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| int compare(const PathExpression *p1, const PathExpression *p2) { | ||
| if (p1->path->name.name < p2->path->name.name) { | ||
| return -1; | ||
| } | ||
| if (p1->path->name.name > p2->path->name.name) { | ||
| return 1; | ||
| } | ||
| return 0; | ||
| } | ||
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| int compare(const ArrayIndex *a1, const ArrayIndex *a2) { | ||
| auto result = compare(a1->left, a2->left); | ||
| if (result != 0) { | ||
| return result; | ||
| } | ||
| const auto *a1Val = a1->right->to<Constant>(); | ||
| BUG_CHECK( | ||
| a1Val != nullptr, | ||
| "Value %1% is not a constant. Only constants are supported as part of a state variable.", | ||
| a1->right); | ||
| const auto *a2Val = a2->right->to<Constant>(); | ||
| BUG_CHECK( | ||
| a2Val != nullptr, | ||
| "Value %1% is not a constant. Only constants are supported as part of a state variable.", | ||
| a2->right); | ||
| if (a1Val->value < a2Val->value) { | ||
| return -1; | ||
| } | ||
| if (a1Val->value > a2Val->value) { | ||
| return 1; | ||
| } | ||
| return 0; | ||
| } | ||
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| int compare(const Expression *e1, const Expression *e2) { | ||
| // e1 is a Member. | ||
| if (const auto *m1 = e1->to<Member>()) { | ||
| if (const auto *m2 = e2->to<Member>()) { | ||
| return IR::compare(m1, m2); | ||
| } | ||
| if (e2->is<PathExpression>()) { | ||
| return 1; | ||
| } | ||
| if (e2->is<ArrayIndex>()) { | ||
| return 1; | ||
| } | ||
| } | ||
| // e1 is a PathExpression. | ||
| if (const auto *p1 = e1->to<PathExpression>()) { | ||
| if (const auto *p2 = e2->to<PathExpression>()) { | ||
| return IR::compare(p1, p2); | ||
| } | ||
| if (e2->is<Member>()) { | ||
| return -1; | ||
| } | ||
| if (e2->is<ArrayIndex>()) { | ||
| return 1; | ||
| } | ||
| } | ||
| // e1 is a ArrayIndex. | ||
| if (const auto *a1 = e1->to<ArrayIndex>()) { | ||
| if (const auto *a2 = e2->to<ArrayIndex>()) { | ||
| return IR::compare(a1, a2); | ||
| } | ||
| if (e2->is<Member>()) { | ||
| return -1; | ||
| } | ||
| if (e2->is<PathExpression>()) { | ||
| return -1; | ||
| } | ||
| } | ||
| BUG("Either %1% of type %2% or %3% of type %4% is not a valid StateVariable", e1, | ||
| e1->node_type_name(), e2, e2->node_type_name()); | ||
| } | ||
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| } // namespace | ||
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| int StateVariable::compare(const Expression *e1, const Expression *e2) { | ||
| return IR::compare(e1, e2); | ||
| } | ||
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| namespace { | ||
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| uint64_t hash(uint64_t seed, const Expression *expression); | ||
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| uint64_t hash(uint64_t seed, const PathExpression *pathExpression) { | ||
| return Util::hash_combine(seed, std::hash<cstring>()(pathExpression->path->name)); | ||
| } | ||
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| uint64_t hash(uint64_t seed, const ArrayIndex *arrayIndex) { | ||
| const auto *arrayIndexVal = arrayIndex->right->to<Constant>(); | ||
| BUG_CHECK( | ||
| arrayIndexVal != nullptr, | ||
| "Value %1% is not a constant. Only constants are supported as part of a state variable.", | ||
| arrayIndex->right); | ||
| return IR::hash(Util::hash_combine(seed, std::hash<big_int>()(arrayIndexVal->value)), | ||
| arrayIndex->left); | ||
| } | ||
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| uint64_t hash(uint64_t seed, const Member *member) { | ||
| return IR::hash(Util::hash_combine(seed, std::hash<cstring>()(member->member)), member->expr); | ||
| } | ||
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| uint64_t hash(uint64_t seed, const Expression *expression) { | ||
| // expression is a Member. | ||
| if (const auto *member = expression->to<Member>()) { | ||
| return hash(seed, member); | ||
| } | ||
| // expression is a PathExpression. | ||
| if (const auto *pathExpression = expression->to<PathExpression>()) { | ||
| return hash(seed, pathExpression); | ||
| } | ||
| // expression is a ArrayIndex. | ||
| if (const auto *arrayIndex = expression->to<ArrayIndex>()) { | ||
| return hash(seed, arrayIndex); | ||
| } | ||
| BUG("Either %1% of type %2% is not a valid StateVariable", expression, | ||
| expression->node_type_name()); | ||
| } | ||
|
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| } // namespace | ||
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| uint64_t StateVariable::hash() const { return IR::hash(0, ref); } | ||
|
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| } // namespace IR |
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