https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68082
--- Comment #4 from angelo <angelo70 at gmail dot com> --- Here what i see when i step into the function: http://imgur.com/2802Ob5 I build on linux $ cat /proc/version Linux version 4.1.7001 (root@jerusalem) (gcc version 5.2.1 20150911 (Debian 5.2.1-17) ) #1 SMP Sat Sep 19 15:29:17 CEST 2015 Compiling with -Wall -Wextra doesn't show anything wrong. Same using -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations, no changes, i still see 0x20000768 linkw %fp,#0 0x2000076c .short 0x48e7 0x2000076e movew %d0,%d4 0x20000770 movel %fp@(8),%d2 0x20000774 movel %fp@(12),%d1 0x20000778 movel %fp@(16),%d3 ... -fsanitize=undefined produces compile time errors intead: /home/angelo/archivio/aziende/sysam/u-boot-extras/4.9.0_issue/main.c|30|undefined reference to `__ubsan_handle_type_mismatch'| Command line that reproduce the issue: Running command: make -f makefile /opt/toolchains/m68k/gcc-5.2.0-nolibc/bin/m68k-linux-gcc -Wall -Wextra -ggdb -fno-builtin -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -ffreestanding -O0 -pipe -mcpu=5307 -c -o main.o main.c /opt/toolchains/m68k/gcc-5.2.0-nolibc/bin/m68k-linux-ld.bfd -n -Bstatic -Tram.ld -Map test.map boot.o main.o -o test.bin -L /opt/toolchains/m68k/gcc-5.2.0-nolibc/lib/gcc/m68k-linux/5.2.0 -lgcc Process terminated with status 0 (0 minute(s), 0 second(s)) 0 error(s), 0 warning(s) (0 minute(s), 0 second(s)) Regards
