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Add warnings for quickly growing FSM table size in fsm_expand

This commit is contained in:
Clifford Wolf 2017-01-26 09:01:26 +01:00
parent b0a430f601
commit 49b8160488
1 changed files with 10 additions and 0 deletions
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10
passes/fsm/fsm_expand.cc
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@ -173,6 +173,16 @@ struct FsmExpand
new_ctrl_out.append(output_sig);
fsm_cell->setPort("\\CTRL_OUT", new_ctrl_out);
if (GetSize(input_sig) > 10)
log_warning("Cell %s.%s (%s) has %d input bits, merging into FSM %s.%s might be problematic.\n",
log_id(cell->module), log_id(cell), log_id(cell->type),
GetSize(input_sig), log_id(fsm_cell->module), log_id(fsm_cell));
if (GetSize(fsm_data.transition_table) > 10000)
log_warning("Transition table for FSM %s.%s already has %d rows, merging more cells "
"into this FSM might be problematic.\n", log_id(fsm_cell->module), log_id(fsm_cell),
GetSize(fsm_data.transition_table));
std::vector<FsmData::transition_t> new_transition_table;
for (auto &tr : fsm_data.transition_table) {
for (int i = 0; i < (1 << input_sig.size()); i++) {