Use hashlib in most remaining code

Signed-off-by: gatecat <gatecat@ds0.me>

1 files changed, 1 insertions, 1 deletions

diff --git a/common/timing_opt.h b/common/timing_opt.h
index 775d9596..46bf3500 100644
--- a/common/timing_opt.h
+++ b/common/timing_opt.h
@@ -29,7 +29,7 @@ struct TimingOptCfg
     // The timing optimiser will *only* optimise cells of these types
     // Normally these would only be logic cells (or tiles if applicable), the algorithm makes little sense
     // for other cell types
-    std::unordered_set<IdString> cellTypes;
+    pool<IdString> cellTypes;
 };
 
 extern bool timing_opt(Context *ctx, TimingOptCfg cfg);