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-rw-r--r--impl/EquationSystem.hpp2
-rw-r--r--impl/Expression.hpp15
-rw-r--r--impl/MaxStrategy.hpp15
-rw-r--r--impl/Operator.hpp43
-rw-r--r--impl/Variable.hpp4
-rw-r--r--impl/main.cpp4
-rw-r--r--impl/systems/.long-fixpoint.swpbin188416 -> 0 bytes
-rw-r--r--impl/systems/long-fixpoint1
8 files changed, 39 insertions, 45 deletions
diff --git a/impl/EquationSystem.hpp b/impl/EquationSystem.hpp
index 772ac37..13319e0 100644
--- a/impl/EquationSystem.hpp
+++ b/impl/EquationSystem.hpp
@@ -119,7 +119,7 @@ struct EquationSystem {
VariableAssignment<T> minFixpoint(const FixpointAlgorithm<T>& algo) const {
VariableAssignment<T> rho = assignment();
- VariableAssignment<T> lastRho = assignment();
+ VariableAssignment<T> lastRho(0);
MaxStrategy<T> strat = strategy();
do {
lastRho = rho;
diff --git a/impl/Expression.hpp b/impl/Expression.hpp
index 4798e60..d3dfcf3 100644
--- a/impl/Expression.hpp
+++ b/impl/Expression.hpp
@@ -7,6 +7,8 @@
template<typename T>
struct Variable;
+template<typename T>
+struct MaxStrategy;
int ExpressionCount;
@@ -22,9 +24,6 @@ struct Expression {
virtual T operator() (const VariableAssignment<T>& assignment) const {
return (*_operator)(_arguments, assignment);
}
- virtual T operator() (const VariableAssignment<T>& assignment, VariableSet<T>* visited) const {
- return (*_operator)(_arguments, assignment, visited);
- }
protected:
Operator<T>* _operator;
std::vector< Expression<T>* > _arguments;
@@ -46,14 +45,17 @@ struct MaxExpression : public Expression<T> {
}
return Expression<T>::_arguments[i];
}
- std::pair<T, unsigned int> bestStrategy(const VariableAssignment<T>& rho) const {
+ virtual T operator() (const VariableAssignment<T>& assignment) const {
+ throw "error";
+ }
+ std::pair<T, unsigned int> bestStrategy(const VariableAssignment<T>& rho, const MaxStrategy<T>& strat) const {
std::pair<T, unsigned int> best = std::pair<T, unsigned int>(-infinity<T>(), 0);
for (unsigned int i = 0, size = Expression<T>::_arguments.size(); i < size; ++i) {
- T value = (*Expression<T>::_arguments[i])(rho);
+ T value = strat(*Expression<T>::_arguments[i], rho);
if (value > best.first)
best = std::pair<T, unsigned int>(value, i);
}
- std::cerr << "Best strategy: (" << best.first << ", " << best.second << ")" << std::endl;
+ std::cerr << "Best strategy: (" << best.first << ", " << best.second << ")" << std::endl << std::endl;
return best;
}
private:
@@ -61,5 +63,6 @@ struct MaxExpression : public Expression<T> {
};
#include "Variable.hpp"
+#include "MaxStrategy.hpp"
#endif
diff --git a/impl/MaxStrategy.hpp b/impl/MaxStrategy.hpp
index a1c50d8..aa49c9d 100644
--- a/impl/MaxStrategy.hpp
+++ b/impl/MaxStrategy.hpp
@@ -59,7 +59,7 @@ struct MaxStrategy {
if (max == NULL) {
return expr(rho);
} else {
- return (*max->argument(_assignment[max->id()]))(rho);
+ return (*this)(*max->argument(_assignment[max->id()]), rho);
}
}
MaxStrategy<T> improve(const EquationSystem<T>& s, const VariableAssignment<T>& rho) const {
@@ -67,16 +67,15 @@ struct MaxStrategy {
for (unsigned int i = 0; i < _length; ++i) {
const MaxExpression<T>& expr = *s.getMax(i);
const T oldValue = (*this)(expr, rho);
- std::pair<const T,unsigned int> best = expr.bestStrategy(rho);
+
+ // this relies on the fact that deeper MaxExpressions have a lower id
+ // than the MaxExpressions containing them. This means that we know that
+ // we have enough of a strategy to work with what we have within us
+ std::pair<const T,unsigned int> best = expr.bestStrategy(rho, newStrategy);
+
if (best.first > oldValue)
newStrategy[expr] = best.second;
}
- std::cerr << "Strat improvement: ";
- if (_length > 0)
- std::cerr << newStrategy[*s.getMax(0)];
- else
- std::cerr << "no max expressions";
- std::cerr << std::endl;
return newStrategy;
}
diff --git a/impl/Operator.hpp b/impl/Operator.hpp
index 80bc8b2..5f7cd1e 100644
--- a/impl/Operator.hpp
+++ b/impl/Operator.hpp
@@ -13,8 +13,6 @@ float infinity() {
template<typename T>
struct Variable;
-template<typename T>
-struct VariableSet : public IdSet<const Variable<T> > {};
template<typename T>
struct VariableAssignment;
@@ -24,35 +22,32 @@ struct Expression;
template<typename T>
struct Operator {
virtual ~Operator() { }
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& rho) const {
- return (*this)(args, rho, (VariableSet<T>*) NULL);
- }
- virtual T operator() (const std::vector< Expression<T>* >&, const VariableAssignment<T>&, VariableSet<T>*) const = 0;
+ virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& rho) const = 0;
};
template<typename T>
struct Maximum : public Operator<T> {
- virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment, VariableSet<T>* visited) const {
+ virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment) const {
T value = -infinity<T>();
for (typename std::vector< Expression<T>* >::const_iterator it = args.begin();
it != args.end();
++it) {
- T temporary = (**it)(assignment, visited);
- value = (temporary < value ? value : temporary);
- if (value == infinity<T>()) break;
+ T temporary = (**it)(assignment);
+ value = (temporary > value ? temporary : value);
+ //if (value == infinity<T>()) break;
}
return value;
}
};
template<typename T>
struct Minimum : public Operator<T> {
- virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment, VariableSet<T>* visited) const {
+ virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment) const {
T value = infinity<T>();
for (typename std::vector< Expression<T>* >::const_iterator it = args.begin();
it != args.end();
++it) {
- T temporary = (**it)(assignment, visited);
+ T temporary = (**it)(assignment);
value = (temporary < value ? temporary : value);
- if (value == -infinity<T>()) break;
+ //if (value == -infinity<T>()) break;
}
return value;
}
@@ -62,7 +57,7 @@ template<typename T>
struct Constant : public Operator<T> {
Constant(const T& val)
: _value(val) { }
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass, VariableSet<T>*) const {
+ T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
return _value;
}
private:
@@ -71,10 +66,10 @@ struct Constant : public Operator<T> {
template<typename T>
struct Addition: public Operator<T> {
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass, VariableSet<T>* visited) const {
+ T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
T sum = (*args[0])(ass);
for (unsigned int i = 1, size = args.size(); i < size; ++i) {
- sum += (*args[i])(ass, visited);
+ sum += (*args[i])(ass);
}
return sum;
}
@@ -82,10 +77,10 @@ struct Addition: public Operator<T> {
template<typename T>
struct Subtraction: public Operator<T> {
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass, VariableSet<T>* visited) const {
+ T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
T sum = (*args[0])(ass);
for (unsigned int i = 1, size = args.size(); i < size; ++i) {
- sum -= (*args[i])(ass, visited);
+ sum -= (*args[i])(ass);
}
return sum;
}
@@ -93,24 +88,24 @@ struct Subtraction: public Operator<T> {
template<typename T>
struct Comma: public Operator<T> {
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass, VariableSet<T>* visited) const {
- if ((*args[0])(ass, visited) == -infinity<T>()) {
+ T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
+ if ((*args[0])(ass) == -infinity<T>()) {
std::cout << "Comma - neg inf" << std::endl;
return -infinity<T>();
} else {
std::cout << "Comma - finite" << std::endl;
- return (*args[1])(ass, visited);
+ return (*args[1])(ass);
}
}
};
template<typename T>
struct Guard: public Operator<T> {
- T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass, VariableSet<T>* visited) const {
- if ((*args[0])(ass, visited) < (*args[1])(ass, visited)) {
+ T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
+ if ((*args[0])(ass) < (*args[1])(ass)) {
return -infinity<T>();
} else {
- return (*args[2])(ass, visited);
+ return (*args[2])(ass);
}
}
};
diff --git a/impl/Variable.hpp b/impl/Variable.hpp
index 5ebbbed..a174ea8 100644
--- a/impl/Variable.hpp
+++ b/impl/Variable.hpp
@@ -17,10 +17,8 @@ struct Variable : public Operator<T> {
return _name;
}
//T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& ass) const {
- virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment, VariableSet<T>* visited) const {
+ virtual T operator() (const std::vector< Expression<T>* >& args, const VariableAssignment<T>& assignment) const {
//assert(args.size() == 0)
- if (visited != NULL)
- visited->insert(*this);
return assignment[*this];
}
private:
diff --git a/impl/main.cpp b/impl/main.cpp
index abd27ba..530556f 100644
--- a/impl/main.cpp
+++ b/impl/main.cpp
@@ -19,7 +19,7 @@ extern "C" {
using namespace std;
template<typename T>
-Expression<T>* treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& system, bool topLevel=true) {
+Expression<T>* treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& system) {
ANTLR3_UINT32 num = node->getChildCount(node);
string name = (char*) node->getText(node)->chars;
@@ -44,7 +44,7 @@ Expression<T>* treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& syste
pANTLR3_BASE_TREE childNode;
for (unsigned int i = 0; i < num; ++i) {
childNode = (pANTLR3_BASE_TREE) node->getChild(node, i);
- args.push_back(treeToExpression(childNode, system, false));
+ args.push_back(treeToExpression(childNode, system));
}
if (name == "max") {
diff --git a/impl/systems/.long-fixpoint.swp b/impl/systems/.long-fixpoint.swp
deleted file mode 100644
index 726d6ce..0000000
--- a/impl/systems/.long-fixpoint.swp
+++ /dev/null
Binary files differ
diff --git a/impl/systems/long-fixpoint b/impl/systems/long-fixpoint
index f56b700..5838910 100644
--- a/impl/systems/long-fixpoint
+++ b/impl/systems/long-fixpoint
@@ -98,7 +98,6 @@ x96 = x95
x97 = x96
x98 = x97
x99 = x98
-<<<<<<< HEAD
x100 = x99
x101 = x100
x102 = x101
generated by cgit v1.2.3 (git 2.46.2) at 2024-11-10 06:44:18 +0000