dist/gcc/tree-ssa-loop-ivopts.c

80    2) Add one doloop dedicated IV cand {(may_be_zero ? 1 : (niter + 1)), +, -1},
1500 	  if (!integer_zerop (niter->may_be_zero))
1503 	      print_generic_expr (dump_file, niter->may_be_zero, TDF_SLIM);
4366     /* See add_iv_candidate_for_doloop, for doloop may_be_zero case, we
5252   mbz = niter->may_be_zero;
5400      may_be_zero set or not.  */
5426   if (!integer_zerop (desc->may_be_zero))
5660      - Base is (may_be_zero ? 1 : (niter + 1)).
5673   tree may_be_zero = niter_desc->may_be_zero;
5674   if (may_be_zero && integer_zerop (may_be_zero))
5675     may_be_zero = NULL_TREE;
5676   if (may_be_zero)
5678       if (COMPARISON_CLASS_P (may_be_zero))
5680 	  niter = fold_build3 (COND_EXPR, ntype, may_be_zero,
5684       /* Don't try to obtain the iteration count expression when may_be_zero is