https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78886
--- Comment #8 from Marc Glisse <glisse at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #5) > I'd say tree-ssa-strlen.c is not the pass that should remove the malloc. We probably want another PR about this, because a malloc whose return value is ignored should not have survived all the way to the strlen pass. gimple_fold_builtin looks like a place where we could handle this. I don't know if there is some attribute that could be put on malloc so that DCE would handle it automatically...
