Basic block re-ordering appears to be unconditionally disabled when optimizing
for size, irrespective of whether -freorder-blocks was specified on command
line. This is applicable to all versions 4.4.1 - 4.5.

As suggested in the following discussion this is incorrect behaviour
http://gcc.gnu.org/ml/gcc/2010-03/msg00365.html


-- 
           Summary: Basic block re-ordering unconditionally disabled for Os
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rahul at icerasemi dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43515

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