https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95488
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Hongtao.liu from comment #1) > I think it's this TYPE_SIGN (TREE_TYPE (REG_EXPR (op1))). That's not reliable. Mutliplication shouldn't care about sign?
