------- Comment #6 from rguenth at gcc dot gnu dot org 2007-11-20 12:20 ------- http://gcc.gnu.org/ml/gcc-patches/2007-11/msg01046.html fixes the miscompile of the C++ frontend.
-fno-strict-aliasing makes the testcase consume a lot more memory than -fstrict-aliasing. Which is why -O is also a lot worse than -O2. What one can also notice is that we create lots of unpartitionable SFTs for structures with just _one_ SFT -- we should not need to create SFTs for those at all. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34148
