https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105936
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- For some reason, split1 pass converts (insn): (insn 54 51 109 9 (parallel [ (asm_operands/v ("btrl %1,%0") ("") 0 [ (mem/c:BLK (plus:DI (plus:DI (unspec:DI [ (const_int 0 [0]) ] UNSPEC_TP) (reg:DI 100)) (const_int 96 [0x60])) [21 MEM[(struct revectored_struct *)&vm86u + 96B]+0 S32 A32]) (reg:SI 101) ] [ (asm_input:BLK ("m") ../../../src/include/cpu.h:355) (asm_input:SI ("r") ../../../src/include/cpu.h:355) ] [] ../../../src/include/cpu.h:355) (clobber (reg:CC 17 flags)) ]) "../../../src/include/cpu.h":355:2 -1 (expr_list:REG_DEAD (reg:SI 101) (expr_list:REG_DEAD (reg:DI 100) (expr_list:REG_UNUSED (reg:CC 17 flags) (nil))))) to (jump_insn): (jump_insn 111 51 113 9 (parallel [ (asm_operands/v ("btrl %1,%0") ("") 0 [ (mem/c:BLK (plus:DI (reg:DI 100) (const_int 96 [0x60])) [21 MEM[(struct revectored_struct *)&vm86u + 96B]+0 S32 A32 AS1]) (reg:SI 101) ] [ (asm_input:BLK ("m") ../../../src/include/cpu.h:355) (asm_input:SI ("r") ../../../src/include/cpu.h:355) ] [] ../../../src/include/cpu.h:355) (clobber (reg:CC 17 flags)) ]) "../../../src/include/cpu.h":355:2 -1 (nil)) This confuses sched2 pass.