http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59420
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Component|c |middle-end
Resolution|--- |INVALID
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #2)
> You'll get more attention paid to this if you can describe why you think the
> code generated is incorrect.
The issue is there is a loop inside of memset that gets converted to a call to
memset; that is if I read the assembly code correctly. if that is the case
then this is a bug in the newlib makefiles as they should be using
-fno-tree-loop-distribute-patterns or like what glibc does:
/* Add the compiler optimization to inhibit loop transformation to library
calls. This is used to avoid recursive calls in memset and memmove
default implementations. */
#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
# define inhibit_loop_to_libcall \
__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
#else
# define inhibit_loop_to_libcall
#endif
So closing as invalid, please report this to newlib.
Note the work around is not to use -O3 or use -O3
-fno-tree-loop-distribute-patterns .
