------- Comment #15 from rguenth at gcc dot gnu dot org 2008-02-06 09:59 ------- profiledbootstrap on x86_64 fails for me with
checking for x86_64-unknown-linux-gnu-gcc... /space/rguenther/obj/./gcc/xgcc -B/space/rguenther/obj/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include checking for suffix of object files... configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[2]: *** [configure-stagefeedback-target-libgcc] Error 1 make[2]: Leaving directory `/space/rguenther/obj' make[1]: *** [stagefeedback-bubble] Error 2 make[1]: Leaving directory `/space/rguenther/obj' make: *** [profiledbootstrap] Error 2 obj> cat stage_current stagefeedback obj> tail x86_64-unknown-linux-gnu/libgcc/config.log configure:2588: /space/rguenther/obj/./gcc/xgcc -B/space/rguenther/obj/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include -c -g -O2 -fprofile-use conftest.c >&5 <built-in>:0: internal compiler error: in real_to_decimal, at real.c:1656 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. configure:2591: $? = 1 where this ICE also occurs for empty conftest.c and if only preprocessing using the stagefeedback cc1. backtrace for just ./cc1 -quiet -E /dev/null #0 fancy_abort (file=0xb530b2 "../../trunk/gcc/real.c", line=1656, function=0xb53b20 "real_to_decimal") at ../../trunk/gcc/diagnostic.c:659 #1 0x000000000065d352 in real_to_decimal (str=0x7fff736bd500 "��s�\177", r_orig=<value optimized out>, buf_size=<value optimized out>, digits=17, crop_trailing_zeros=0) at ../../trunk/gcc/real.c:1656 #2 0x0000000000471275 in builtin_define_with_hex_fp_value ( macro=0x7fff736bd620 "__DBL_MAX__", type=<value optimized out>, digits=1, hex_str=<value optimized out>, fp_suffix=0xb0b55b "", fp_cast=0xb29315 "%s") at ../../trunk/gcc/c-cppbuiltin.c:859 #3 0x00000000004714c1 in builtin_define_float_constants ( name_prefix=0xaff950 "DBL", fp_suffix=0xb0b55b "", fp_cast=0xb29315 "%s", type=0x2b19379cf780) at ../../trunk/gcc/c-cppbuiltin.c:205 #4 0x0000000000471ab3 in c_cpp_builtins (pfile=0xecbf70) at ../../trunk/gcc/c-cppbuiltin.c:516 #5 0x0000000000467c9a in finish_options () at ../../trunk/gcc/c-opts.c:1508 #6 0x0000000000468069 in c_common_init () at ../../trunk/gcc/c-opts.c:1243 #7 0x000000000047341e in c_objc_common_init () at ../../trunk/gcc/c-objc-common.c:72 #8 0x00000000006d0410 in toplev_main (argc=0, argv=<value optimized out>) at ../../trunk/gcc/toplev.c:2130 #9 0x00002b19377a4154 in __libc_start_main () from /lib64/libc.so.6 #10 0x0000000000403f49 in _start () in frame 3, the hex float looks good: (gdb) print buf $3 = "0x0.", 'f' <repeats 13 times>, "8p1024\000 so it must be indeed the real_to_decimal monster that is miscompiled with -O2 -fprofile-use (given the 'correct' profile). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33992
