Hello!
The clobber of the scratch register has disappeared!A possible clue as to what sets up the failure is that the second replacement insn (to replace insn 7) (set (reg:HI 24) (eq:HI (reg:CCZ_C 13 cc) (const_int 0 [0x0]))) needs to have a clobber added. It really looks like this: (set (reg:HI 24) (eq:HI (reg:CCZ_C 13 cc) (const_int 0 [0x0]))) (clobber (reg:CC 13 cc)) Combine knows how to add clobbers to make insns recognizable. I'm guessing it accidentally clobbers the original insn in doing so. Where would I look?
Try by tracing through recog_for_combine(), combine.c. Uros.
