https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70488
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- That said, the function also contains bogus loop like: /* Descend into a struct or union to find the member whose address is being used as the agument. */ while (TREE_CODE (oper) == COMPONENT_REF) { tree op0 = oper; while (TREE_CODE (op0 = TREE_OPERAND (op0, 0)) == COMPONENT_REF); if (TREE_CODE (op0) == VAR_DECL) var_decl = op0; oper = TREE_OPERAND (oper, 1); } TREE_OPERAND (, 1) of a COMPONENT_REF is a FIELD_DECL, so the loop doesn't make sense, it will never loop more than once (so it is the same as if). Martin, what exactly you've meant here?