[Bug tree-optimization/58431] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu (in 32-bit mode)

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58431

--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
-fdisable-tree-phicprop2 lets it pass (the dumps appear identical before and
after this pass, but with verbose dumps we see some memory PHIs disappear)
-fdisable-tree-cddce2 also lets it pass, with larger differences in the dumps.