[Bug middle-end/40965] New: [graphite] slow compilation

[jv244 at cam dot ac dot uk]

the attached testcase compiles in about 3s with

gfortran -c  -ffree-form -O3 -ffast-math -ftree-vectorize -funroll-loops
-march=native -ftime-report bug.f90

but requires about 130s adding -fgraphite-identity to the options

GRAPHITE loop transforms: 123.82 (97%) usr   0.59 (89%) sys 124.37 (97%) wall  
 2262 kB ( 7%) ggc


-- 
           Summary: [graphite] slow compilation
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: compile-time-hog
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40965