http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59597

            Bug ID: 59597
           Summary: Performance degradation on Coremark after r205074
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: izamyatin at gmail dot com
            Target: x86

Created attachment 31510
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31510&action=edit
reduced test

Degradation could be seen at -Ofast for the attached test which similar to the
Coremark codes

It seems that jump threading here performs unnecessary nodes duplication and as
a result if-conversion doesn't happen.

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