https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87133
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> --- Backtrace from GDB with function arguments visible: #0 0x00000000015140fd in aggregate_value_p (exp=0x0, fntype=0x0) at /home/marxin/Programming/gcc/gcc/function.c:2046 #1 0x0000000000f3d2e0 in emit_library_call_value_1 (retval=1, orgfun=0x7ffff5834210, value=0x0, fn_type=LCT_CONST, outmode=E_KFmode, nargs=1, args=0x7fffffffc0d0) at /home/marxin/Programming/gcc/gcc/calls.c:4745 #2 0x000000000136c557 in emit_library_call_value (fun=0x7ffff5834210, value=0x0, fn_type=LCT_CONST, outmode=E_KFmode, arg1=0x7ffff5912ea0, arg1_mode=E_SFmode) at /home/marxin/Programming/gcc/gcc/rtl.h:4185 #3 0x00000000013b3a7a in convert_mode_scalar (to=0x7ffff5917558, from=0x7ffff5912ea0, unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:329 #4 0x00000000013b2da4 in convert_move (to=0x7ffff5917558, from=0x7ffff5912ea0, unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:271 #5 0x00000000013ba345 in convert_modes (mode=E_KFmode, oldmode=E_SFmode, x=0x7ffff5912ea0, unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:712 #6 0x00000000013b86db in convert_to_mode (mode=E_KFmode, x=0x7ffff5912ea0, unsignedp=0) at /home/marxin/Programming/gcc/gcc/expr.c:637 #7 0x0000000001c27738 in expand_fix (to=0x7ffff5912f30, from=0x7ffff5912ea0, unsignedp=1) at /home/marxin/Programming/gcc/gcc/optabs.c:4930 #8 0x0000000001405268 in expand_expr_real_2 (ops=0x7fffffffd1e0, target=0x7ffff5912f30, tmode=E_DImode, modifier=EXPAND_NORMAL) at /home/marxin/Programming/gcc/gcc/expr.c:8961 #9 0x0000000000f8e553 in expand_gimple_stmt_1 (stmt=<gimple_assign 0x7ffff59090f0>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3673 #10 0x0000000000f8ea9a in expand_gimple_stmt (stmt=<gimple_assign 0x7ffff59090f0>) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:3734 #11 0x0000000000fa3f59 in expand_gimple_basic_block (bb=<basic_block 0x7ffff5831138 (2)>, disable_tail_calls=false) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:5770 #12 0x0000000000fa88db in (anonymous namespace)::pass_expand::execute (this=0x6e6f770, fun=0x7ffff5903000) at /home/marxin/Programming/gcc/gcc/cfgexpand.c:6373 #13 0x0000000001d1578d in execute_one_pass (pass=<opt_pass* 0x6e6f770 "expand"(235)>) at /home/marxin/Programming/gcc/gcc/passes.c:2446 #14 0x0000000001d1611e in execute_pass_list_1 (pass=<opt_pass* 0x6e6f770 "expand"(235)>) at /home/marxin/Programming/gcc/gcc/passes.c:2535 #15 0x0000000001d16272 in execute_pass_list (fn=0x7ffff5903000, pass=<opt_pass* 0x6e6bb20 "fixup_cfg"(88)>) at /home/marxin/Programming/gcc/gcc/passes.c:2546 #16 0x00000000010a13e3 in cgraph_node::expand (this=<cgraph_node * const 0x7ffff580b420 "real_do_1"/1>) at /home/marxin/Programming/gcc/gcc/cgraphunit.c:2121 #17 0x00000000010a3a16 in output_in_order () at /home/marxin/Programming/gcc/gcc/cgraphunit.c:2365 #18 0x00000000010a5434 in symbol_table::compile (this=0x7ffff580d000) at /home/marxin/Programming/gcc/gcc/cgraphunit.c:2609 #19 0x00000000010a5ea7 in symbol_table::finalize_compilation_unit (this=0x7ffff580d000) at /home/marxin/Programming/gcc/gcc/cgraphunit.c:2788 #20 0x00000000020dd5b6 in compile_file () at /home/marxin/Programming/gcc/gcc/toplev.c:480 #21 0x00000000020e4821 in do_compile () at /home/marxin/Programming/gcc/gcc/toplev.c:2170 #22 0x00000000020e4e50 in toplev::main (this=0x7fffffffd98e, argc=12, argv=0x7fffffffda88) at /home/marxin/Programming/gcc/gcc/toplev.c:2305 #23 0x0000000003aec681 in main (argc=12, argv=0x7fffffffda88) at /home/marxin/Programming/gcc/gcc/main.c:39
