Granted, the compiler flags I've used for testing are asking for trouble...
$ gcc -march=pentium4 -mfpmath=sse,387 -o mplayer.o mplayer.i mplayer.c: In function 'main': mplayer.c:3750: error: unrecognizable insn: (insn 5170 5169 5171 674 mplayer.c:3552 (set (reg:SF 258 [ D.19380 ]) (float:SF (reg:DI 259 [ step_sec.1242 ]))) -1 (nil)) mplayer.c:3750: internal compiler error: in extract_insn, at recog.c:1990 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. -- Summary: [4.3 regression] internal compiler error: in extract_insn, at recog.c:1990 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: bero at arklinux dot org GCC build triplet: i586-pc-linux-gnu GCC host triplet: i586-pc-linux-gnu GCC target triplet: i586-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33471