[Bug gcov-profile/55674] New: [4.8 Regression] >20% size increase of lto/pgo binaries since r193747

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55674

             Bug #: 55674
           Summary: [4.8 Regression] >20%  size increase of lto/pgo
                    binaries since r193747
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: markus@trippelsdorf.de


See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375#c144 onwards.

Binaries build with "-flto -fprofile-use" increased more than 20% in size
since revision 193747 went in.

libxul's size increased ~20%:
34MB before, 42MB now.

This also happens for simpler testcases, e.g tramp3d-v4.cpp (30% increase):
0.9MB before,  1.3M now.

Setting "--param hot-bb-count-ws-permille" to lower values doesn't help.