[Bug c/63393] [regression]-ffreestanding not work: memset call cause valgrind crash

[dushistov at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63393

--- Comment #4 from Evgeniy Dushistov <dushistov at mail dot ru> ---
(In reply to Mikael Pettersson from comment #3)
> I don't know if this is supposed to be "fixed" (for all str* and mem*
> functions one might want to implement oneself), but the standard workaround
> is to compile with -fno-tree-loop-distribute-patterns.  The -ffreestanding
> does nothing for these annoying transformations.

Not sure why you think so.

>From gcc manual:

>a "conforming freestanding implementation" is only required to provide certain
>library facilities: those in `<float.h>', `<limits.h>', `<stdarg.h>',
>and `<stddef.h>'; since AMD1, also those in `<iso646.h>'; since C99,
>also those in `<stdbool.h>' and `<stdint.h>'; and since C11, also those
>in `<stdalign.h>' and `<stdnoreturn.h>'


So in "freestanding" case we have no "string.h" and compiler should not insert
any function calls from it.