Fails to compile when optimizations are enabled test.c: In function ‘main’: test.c:14:1: error: unrecognizable insn: } ^ (insn 30 29 31 2 (set (reg:HI 25 [ _5 ]) (const_int 4194412 [0x40006c])) test.c:11 -1 (nil)) test.c:14:1: internal compiler error: in extract_insn, at recog.c:2287