59 zero_p (tree arg)  in zero_p()  function
231       if (!iv1->no_overflow && !zero_p (mod))  in number_of_iterations_lt_to_ne()
237 	  if (zero_p (assumption))  in number_of_iterations_lt_to_ne()
250       if (!iv0->no_overflow && !zero_p (mod))  in number_of_iterations_lt_to_ne()
256 	  if (zero_p (assumption))  in number_of_iterations_lt_to_ne()
269   if (!zero_p (noloop))  in number_of_iterations_lt_to_ne()
336   if (zero_p (assumption))  in assert_no_overflow_lt()
400   if (!zero_p (mbz))  in assert_loop_rolls_lt()
436        && zero_p (iv1->step))  in number_of_iterations_lt()
438 	  && zero_p (iv0->step)))  in number_of_iterations_lt()
519       if (zero_p (assumption))  in number_of_iterations_le()
575       || (code == NE_EXPR && zero_p (iv0->step)))  in number_of_iterations_cond()
611   if (!zero_p (iv0->step) && iv0->no_overflow)  in number_of_iterations_cond()
613   else if (!zero_p (iv1->step) && iv1->no_overflow)  in number_of_iterations_cond()
621   if (!zero_p (iv0->step) && !zero_p (iv1->step))  in number_of_iterations_cond()
636   if (zero_p (iv0->step) && zero_p (iv1->step))  in number_of_iterations_cond()
645       if (!zero_p (iv1->step) && !tree_int_cst_sign_bit (iv1->step))  in number_of_iterations_cond()
650   if (zero_p (fold_build2 (code, boolean_type_node, iv0->base, iv1->base)))  in number_of_iterations_cond()
661       gcc_assert (zero_p (iv1->step));  in number_of_iterations_cond()
831       if (zero_p (e) || nonzero_p (e))  in tree_simplify_using_condition_1()
835       if (zero_p (e) || nonzero_p (e))  in tree_simplify_using_condition_1()
845       if (zero_p (e))  in tree_simplify_using_condition_1()
848       if (zero_p (e))  in tree_simplify_using_condition_1()
858       if (zero_p (e))  in tree_simplify_using_condition_1()
861       if (zero_p (e))  in tree_simplify_using_condition_1()
875   if (e && zero_p (e))  in tree_simplify_using_condition_1()
1147       if (!zero_p (iv1.step)  in number_of_iterations_exit()
1148 	  ? (zero_p (iv0.step)  in number_of_iterations_exit()
1204       if (!zero_p (desc.may_be_zero))  in find_loop_niter()
1437       if (acnd && zero_p (acnd))  in loop_niter_by_eval()
1875       if (!zero_p (niter_desc.may_be_zero)  in estimate_numbers_of_iterations_loop()
2030   if (zero_p (step))  in scev_probably_wraps_p()