https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111256
Xi Ruoyao <xry111 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |xry111 at gcc dot gnu.org
Resolution|--- |INVALID
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
In the 2nd iteration of "for (; h <= 3; h = fn3() + h)" the code uses
uninitialized value:
$ clang t.c -O0 -fsanitize=memory -g
$ ./a.out
==76055==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x56392dea5370 in main /home/xry111/t.c:31:5
#1 0x7f9671e27f59 in __libc_start_call_main
/home/xry111/sources/lfs/glibc-2.38/csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#2 0x7f9671e28024 in __libc_start_main@GLIBC_2.2.5
/home/xry111/sources/lfs/glibc-2.38/csu/../csu/libc-start.c:360:3
#3 0x56392de0f2d0 in _start
/home/xry111/sources/lfs/glibc-2.38/csu/../sysdeps/x86_64/start.S:115
SUMMARY: MemorySanitizer: use-of-uninitialized-value /home/xry111/t.c:31:5 in
main
Exiting
Thus invalid.
