https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70178
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is because we don't know that for
struct string { char *data; } s;
s->data doesn't point to &s->data and thus writing to s->data[i] may invalidate
the pointer. Unfortunately 'char' aliases everything so writing to a char *
object and then reading back as char * is valid from a TBAA perspective.
