[Bug rtl-optimization/54792] New: [4.8 Regression] -fcompare-debug failures introduced by r191493

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54792

             Bug #: 54792
           Summary: [4.8 Regression] -fcompare-debug failures introduced
                    by r191493
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: jakub@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org
                CC: bernds@gcc.gnu.org
            Target: i686-linux


Created attachment 28338
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28338
tree-inline.ii.bz2

While bootstrapping a newer PR54519 fix, I've encountered a bootstrap
comparison failure on i686-linux, which can be reproduced by stock trunk on the
patched tree-inline.ii with:
./g++ -B ./ -S -O2 -m32 -fcompare-debug tree-inline.ii
g++: error: tree-inline.ii: -fcompare-debug failure (length)

I've bisected it to the
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191493
changes.