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Fixed use-after-free dict<> usage pattern in hierarchy.cc

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This commit is contained in:
Clifford Wolf 2016-08-16 09:07:13 +02:00
parent b4d544f0d9
commit 00f29d5e5c
1 changed files with 3 additions and 1 deletions
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4
passes/hierarchy/hierarchy.cc
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@ -322,10 +322,12 @@ bool set_keep_assert(std::map<RTLIL::Module*, bool> &cache, RTLIL::Module *mod)
int find_top_mod_score(Design *design, Module *module, dict<Module*, int> &db) int find_top_mod_score(Design *design, Module *module, dict<Module*, int> &db)
{ {
if (db.count(module) == 0) { if (db.count(module) == 0) {
int score = 0;
db[module] = 0; db[module] = 0;
for (auto cell : module->cells()) for (auto cell : module->cells())
if (design->module(cell->type)) if (design->module(cell->type))
db[module] = max(db[module], find_top_mod_score(design, design->module(cell->type), db) + 1); score = max(score, find_top_mod_score(design, design->module(cell->type), db) + 1);
db[module] = score;
} }
return db.at(module); return db.at(module);
} }