The code is taken from the multimedia package pd and reduced. It may be
reproduced with
# gcc -c -O2 d.i
d.i: In function 'osc_perform':
d.i:35: internal compiler error: in schedule_insns, at sched-rgn.c:2549
--
Summary: ICE in schedule_insns, at sched-rgn.c:2549
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: b dot gunreben at web dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: hppa-suse-linux-gnu
GCC host triplet: hppa-suse-linux-gnu
GCC target triplet: hppa-suse-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21122