The following triggered with CP2K:

gfortran -v -c -O3 -ffast-math -funroll-loops -ftree-vectorize -march=native
xc_xbecke88_lr_adiabatic.f90
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /data/vondele/gcc_bench/gcc_trunk/gcc/configure
--prefix=/data/vondele/gcc_bench/gcc_trunk/build --enable-languages=c,fortran
Thread model: posix
gcc version 4.4.0 20080826 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-c' '-O3' '-ffast-math' '-funroll-loops'
'-ftree-vectorize'

/data/vondele/gcc_bench/gcc_trunk/build/libexec/gcc/x86_64-unknown-linux-gnu/4.4.0/f951
xc_xbecke88_lr_adiabatic.f90 -march=core2 -mcx16 -msahf --param
l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=4096
-mtune=core2 -quiet -dumpbase xc_xbecke88_lr_adiabatic.f90 -auxbase
xc_xbecke88_lr_adiabatic -O3 -version -ffast-math -funroll-loops
-ftree-vectorize -fintrinsic-modules-path
/data/vondele/gcc_bench/gcc_trunk/build/lib/gcc/x86_64-unknown-linux-gnu/4.4.0/finclude
-o /tmp/cci09Vqi.s
GNU Fortran (GCC) version 4.4.0 20080826 (experimental)
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.4.0 20080826 (experimental), GMP version
4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
xc_xbecke88_lr_adiabatic.f90: In function ‘xb88_lr_adiabatic_lda_calc’:
xc_xbecke88_lr_adiabatic.f90:492: internal compiler error: in
delete_allocno_from_bucket, at ira-color.c:619

testcase to be attached. Using -march=opteron (which I used to test the ira
branch) is enough to avoid it, so the -march=xxx and so on parameters are
relevant.

Full sources can be downloaded:
http://cp2k.berlios.de/gfortran/
ftp://ftp.berlios.de/pub/cp2k/gfortran/gcc_bench.tgz


-- 
           Summary: [4.4 Regression] ICE with ira:
                    delete_allocno_from_bucket
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk
OtherBugsDependingO 29975
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37251