------- Comment #15 from hubicka at gcc dot gnu dot org 2007-12-29 22:31 ------- Well, I would personally not worry that much about pesimization. The current behaviour of increasing register pressure is worse. We definitly can insert the initialization to common dominator of all uses of the initialized SSA name, but the dominator tree nor the uses are readily available and I am not convinced it is worth the effort. I did some behchmarking on C++ benchmarks with patch initializing to 0 and found no regressionons. I will send patch shortly (the version I tested had little bug causing occasitonal ICEs)
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31081
