[Bug tree-optimization/18687] New: [4.0 Regression] ~50% compile time regression

["belyshev at lubercy dot com" <gcc-bugzilla at gcc dot gnu dot org>]

These two files taken from linux kernel (hashes.c) and zlib (infcodes.c)

hashes.c:

        3.4.4   4.0.0   delta

-O0     0.045   0.049    9%
-O1     0.067   0.144  115%
-O2     0.108   0.177   64%

infcodes.c:

        3.4.4   4.0.0   delta

-O0     0.080   0.086    7%
-O1     0.120   0.223   86%
-O2     0.196   0.295   51%

-- 
           Summary: [4.0 Regression] ~50% compile time regression
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: compile-time-hog
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at lubercy dot com
                CC: gcc-bugs at gcc dot gnu dot org
 BugsThisDependsOn: 15678


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18687