$ avr-gcc -mmcu=at90pwm316 -g -O2 -Wall -Wextra -Werror -Os -mtiny-stack -I../.. -I.. -MMD -DBOOTLOADER -DF_CPU=16000000 -c -o serial.o ../../serial.c ../../serial.c: In function ‘serial_read’: ../../serial.c:13: error: unrecognizable insn: (insn/f 52 51 53 2 ../../serial.c:9 (set (reg:QI 28 r28) (plus:QI (reg/f:HI 28 r28) (const_int -4 [0xfffffffc]))) -1 (nil)) ../../serial.c:13: internal compiler error: in extract_insn, at recog.c:1990
-- Summary: ICE in extract_insn, at recog.c:1990 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sjackman at gmail dot com GCC target triplet: avr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34412