analyzer: presize m_cluster_map in store copy ctor

Testing cc1 on pr93032-mztools-unsigned-char.c Benchmark #1: (without patch) Time (mean ± σ): 338.8 ms ± 13.6 ms [User: 323.2 ms, System: 14.2 ms] Range (min … max): 326.7 ms … 363.1 ms 10 runs Benchmark gcc-mirror#2: (with patch) Time (mean ± σ): 332.3 ms ± 12.8 ms [User: 316.6 ms, System: 14.3 ms] Range (min … max): 322.5 ms … 357.4 ms 10 runs Summary ./cc1.new ran 1.02 ± 0.06 times faster than ./cc1.old gcc/analyzer/ChangeLog: * store.cc (store::store): Presize m_cluster_map. Signed-off-by: David Malcolm <[email protected]>
jwakely · Mar 15, 2022 · a58e342 · a58e342
1 parent b5baf56
commit a58e342
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/gcc/analyzer/store.cc b/gcc/analyzer/store.cc
@@ -2032,7 +2032,8 @@ store::store ()
 /* store's copy ctor.  */
 
 store::store (const store &other)
-: m_called_unknown_fn (other.m_called_unknown_fn)
+: m_cluster_map (other.m_cluster_map.elements ()),
+  m_called_unknown_fn (other.m_called_unknown_fn)
 {
   for (cluster_map_t::iterator iter = other.m_cluster_map.begin ();
        iter != other.m_cluster_map.end ();