[Bug tree-optimization/34148] [4.3 Regression] Too many VOPs, too deep tree-ssa-sccvn.c recursion

[rguenth at gcc dot gnu dot org]

------- 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.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34148