[Bug rtl-optimization/38583] New: [4.4 Regression] ira memory explosion

[jv244 at cam dot ac dot uk]

This is split off from PR38474 for clarity. Compiling the testcase of that PR 

(http://gcc.gnu.org/bugzilla/attachment.cgi?id=16873)

as

gfortran -ffree-line-length-512 -g -ffree-form -ftime-report -c -O3
-march=native -funroll-loops -fno-rename-registers testcase.f90

requires ~9.3Gb of RAM with mainline, while 4.3 only requires ~2.5Gb.


-- 
           Summary: [4.4 Regression] ira memory explosion
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: memory-hog
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk
OtherBugsDependingO 38474
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38583