[Bug tree-optimization/59100] requesting optimization of safe rotate function

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59100

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

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                 CC|                            |glisse at gcc dot gnu.org

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Created attachment 32013
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32013&action=edit
phiopt patch

Needs more comments and a testcase, but this passes regtesting and seems to
work. For next stage 1...