------- Comment #12 from steven at gcc dot gnu dot org 2005-11-05 16:55 ------- Breakpoint 4, emit_move_insn (x=0x2a95a69320, y=0x2a9594c820) at expr.c:3140 3140 enum machine_mode mode = GET_MODE (x); (gdb) p debug_rtx(x) (reg:DI 68) $10 = void (gdb) p debug_rtx(y) (const:DI (plus:DI (symbol_ref/f:DI ("*.LC0") [flags 0x2] <string_cst 0x2a95a62510>) (const_int 4294967233 [0xffffffc1]))) $11 = void (gdb) bt #0 emit_move_insn (x=0x2a95a69320, y=0x2a9594c820) at expr.c:3140 #1 0x0000000000a6e5a9 in move_movables (loop=0xe72f80, movables=0xe766d8, threshold=93, insn_count=9) at loop.c:2365 #2 0x0000000000a6c59a in scan_loop (loop=0xe72f80, flags=0) at loop.c:1522 #3 0x0000000000a6a1a1 in loop_optimize (f=0x2a9589b940, dumpfile=0x0, flags=0) at loop.c:909 #4 0x0000000000a81e30 in rest_of_handle_loop_optimize () at loop.c:11784 #5 0x0000000000946f77 in execute_one_pass (pass=0xd9ae80) at passes.c:827
A bit further down: 3185 last_insn = emit_move_insn_1 (x, y); (gdb) disab 4 (gdb) next 3187 if (y_cst && REG_P (x) (gdb) p debug_rtx(last_insn) (insn 60 59 0 (set (reg:DI 68) (plus:DI (reg/f:DI 69) (const_int 4294967233 [0xffffffc1]))) -1 (nil) (nil)) $12 = void (gdb) p recog_memoized (last_insn) $13 = -1 (gdb) next 3191 set_unique_reg_note (last_insn, REG_EQUAL, y_cst); (gdb) 3193 return last_insn; (gdb) 3194 } So there's your wrong instruction, produced by emit_move_insn itself... :-( -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24683