Improved TopoSort determinism

This commit is contained in:
Clifford Wolf 2014-11-07 15:21:03 +01:00
parent 461594bb83
commit 546e8b5fe7
5 changed files with 16 additions and 14 deletions

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@ -216,7 +216,7 @@ namespace RTLIL
// set has an influence on the algorithm.
template<typename T> struct compare_ptr_by_name {
bool operator()(const T *a, const T *b) {
bool operator()(const T *a, const T *b) const {
return (a == nullptr || b == nullptr) ? (a < b) : (a->name < b->name);
}
};

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@ -128,12 +128,12 @@ public:
// A simple class for topological sorting
// ------------------------------------------------
template<typename T>
template<typename T, typename C = std::less<T>>
struct TopoSort
{
bool analyze_loops, found_loops;
std::map<T, std::set<T>> database;
std::set<std::set<T>> loops;
std::map<T, std::set<T, C>, C> database;
std::set<std::set<T, C>> loops;
std::vector<T> sorted;
TopoSort()
@ -145,7 +145,7 @@ struct TopoSort
void node(T n)
{
if (database.count(n) == 0)
database[n] = std::set<T>();
database[n] = std::set<T, C>();
}
void edge(T left, T right)
@ -154,12 +154,12 @@ struct TopoSort
database[right].insert(left);
}
void sort_worker(const T &n, std::set<T> &marked_cells, std::set<T> &active_cells, std::vector<T> &active_stack)
void sort_worker(const T &n, std::set<T, C> &marked_cells, std::set<T, C> &active_cells, std::vector<T> &active_stack)
{
if (active_cells.count(n)) {
found_loops = true;
if (analyze_loops) {
std::set<T> loop;
std::set<T, C> loop;
for (int i = GetSize(active_stack)-1; i >= 0; i--) {
loop.insert(active_stack[i]);
if (active_stack[i] == n)
@ -197,8 +197,8 @@ struct TopoSort
sorted.clear();
found_loops = false;
std::set<T> marked_cells;
std::set<T> active_cells;
std::set<T, C> marked_cells;
std::set<T, C> active_cells;
std::vector<T> active_stack;
for (auto &it : database)

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@ -198,7 +198,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
SigMap assign_map(module);
std::map<RTLIL::SigSpec, RTLIL::SigSpec> invert_map;
TopoSort<RTLIL::Cell*> cells;
TopoSort<RTLIL::Cell*, RTLIL::IdString::compare_ptr_by_name<RTLIL::Cell>> cells;
std::map<RTLIL::Cell*, std::set<RTLIL::SigBit>> cell_to_inbit;
std::map<RTLIL::SigBit, std::set<RTLIL::Cell*>> outbit_to_cell;

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@ -27,6 +27,8 @@
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
typedef RTLIL::IdString::compare_ptr_by_name<RTLIL::Cell> cell_ptr_cmp;
struct ShareWorkerConfig
{
int limit;
@ -52,8 +54,8 @@ struct ShareWorker
std::set<RTLIL::Cell*> recursion_state;
SigMap topo_sigmap;
std::map<RTLIL::Cell*, std::set<RTLIL::Cell*>> topo_cell_drivers;
std::map<RTLIL::SigBit, std::set<RTLIL::Cell*>> topo_bit_drivers;
std::map<RTLIL::Cell*, std::set<RTLIL::Cell*, cell_ptr_cmp>, cell_ptr_cmp> topo_cell_drivers;
std::map<RTLIL::SigBit, std::set<RTLIL::Cell*, cell_ptr_cmp>> topo_bit_drivers;
std::vector<std::pair<RTLIL::SigBit, RTLIL::SigBit>> exclusive_ctrls;
@ -937,7 +939,7 @@ struct ShareWorker
ct.setup_internals();
ct.setup_stdcells();
TopoSort<RTLIL::Cell*> toposort;
TopoSort<RTLIL::Cell*, cell_ptr_cmp> toposort;
toposort.analyze_loops = false;
topo_sigmap.set(module);

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@ -281,7 +281,7 @@ struct TechmapWorker
SigMap sigmap(module);
TopoSort<RTLIL::Cell*> cells;
TopoSort<RTLIL::Cell*, RTLIL::IdString::compare_ptr_by_name<RTLIL::Cell>> cells;
std::map<RTLIL::Cell*, std::set<RTLIL::SigBit>> cell_to_inbit;
std::map<RTLIL::SigBit, std::set<RTLIL::Cell*>> outbit_to_cell;