https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61047
--- Comment #6 from Bernd Edlinger <bernd.edlinger at hotmail dot de> --- they only happen in stage3, not in stage2. expmed.c.214r.reload: ;; Function long unsigned int choose_multiplier(long unsigned int, int, int, long unsigned int*, int*, int*) (_Z17choose_multipliermiiPmPiS0_, funcdef_no=1085, decl_uid=47659, symbol_order=801) ... 557: r13:DI=0x7ffffff78 REG_EQUIV 0x7ffffff78 ... 547: debug this => debug_implicit_ptr 548: debug D#64 => debug_implicit_ptr 549: debug D#37 => D#64 550: debug this => D#37 551: debug len => optimized away 552: debug D#65 => debug_implicit_ptr 553: debug D#39 => D#65 554: debug this => D#39 555: debug high => [sp:DI+0x800000038] 556: debug res => 0 560: NOTE_INSN_DELETED 1334: NOTE_INSN_DELETED 1367: ax:DI=[sp:DI+r13:DI+0xc0] fixed-value.c.214r.reload: ;; Function void fixed_from_string(fixed_value*, const char*, machine_mode) (_Z17fixed_from_stringP11fixed_valuePKc12machine_mode, funcdef_no=827, decl_uid=38219, symbol_order=541) ... 89: NOTE_INSN_BASIC_BLOCK 8 90: debug this => sp:DI+0x70 91: debug D#17 => sp:DI+0x70 92: debug D#2 => D#17 93: debug this => D#2 94: debug len => optimized away 95: debug D#18 => sp:DI+0x70 96: debug this => D#18 97: debug high => [sp:DI+0x800000068] 98: dx:DI=0x7ffffffd8 REG_EQUIV 0x7ffffffd8 100: dx:DI=[sp:DI+dx:DI+0x90] REG_EQUAL [frame:DI+0x7ffffffd8] unfortunately, gcc crashes when compiling fold-const.c when I add -fdump-rtl-all-slim to the command line.