[Bug middle-end/49310] New: [4.7 Regression] Compile time hog

["Joost.VandeVondele at pci dot uzh.ch" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49310

           Summary: [4.7 Regression] Compile time hog
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: Joost.VandeVondele@pci.uzh.ch


Created attachment 24456
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24456
testcase

The attached testcase requires a very long compile time with current trunk.

this requires about 35s (+- OK)
gfortran -c -O1 -g hog.f90 

this requires > 900s 
gfortran -c -O1 -g -fbounds-check hog.f90

(4.6 branch does better with only 57s in the latter case)

The same testcase was discussed (and fixed) in 

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43627

but the issue might be different this time.