[Bug rtl-optimization/55611] Operand swapping for commutative operators

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55611

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #28931|0                           |1
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> 2013-03-12 13:04:28 UTC ---
Created attachment 29652
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29652
Use tree code to determine the canonical order (2)

With this slight tweak to simplify_associative_operation it now passes
bootstrap+testsuite on x86_64-linux-gnu, both in this order and the reverse
order. I am not sure it is the best way to break the infinite recursion, but it
seems to work.