[Bug rtl-optimization/55489] New: [4.7 regression] insane PRE memory usage with PIE (translate.i)

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55489

             Bug #: 55489
           Summary: [4.7 regression] insane PRE memory usage with PIE
                    (translate.i)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Keywords: memory-hog
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: bonzini@gnu.org


Created attachment 28793
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28793
gzipped preprocessed source

Yet another evil testcase, this time for RTL GCSE.  Compile with:

$ gcc ~/translate.i -g -O2 -fPIE

gcc 4.4.6:
 PRE :   3.83 (24%) usr   0.15 (17%) sys   3.99 (24%) wall  267307 kB (33%) ggc

gcc 4.7.2:
 PRE :   7.95 (41%) usr   0.40 (40%) sys   8.31 (41%) wall  821017 kB (80%) ggc

Fixed, or latent in trunk:

gcc 4.8.0:
 PRE :   6.94 (26%) usr   0.02 ( 4%) sys   6.98 (26%) wall     731 kB ( 0%) ggc