[Bug middle-end/38533] [4.2/4.3/4.4 regression] tree-ssa-reassoc.c increases register pressure several times

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2008-12-17 16:04 -------
The problem with the patch is that useless insns (visited with has_zero_uses on
lhs) are now scattered in the bbs and so aren't removed immediately.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38533