[gcc r14-2292] Remove unnecessary check on scalar_niter == 0

[gcc r14-2292] Remove unnecessary check on scalar_niter == 0

[Richard Biener]

https://gcc.gnu.org/g:6eea7eaf11e2b04670c4bb75f48600747dd76768

commit r14-2292-g6eea7eaf11e2b04670c4bb75f48600747dd76768
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Jul 4 10:37:53 2023 +0200

    Remove unnecessary check on scalar_niter == 0
    
    The following removes an unnecessary check.
    
            * tree-vect-loop.cc (vect_analyze_loop_costing): Remove
            check guarding scalar_niter underflow.

Diff:
---
 gcc/tree-vect-loop.cc | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index e504645f1df..3b46c58a8d8 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -2180,13 +2180,6 @@ vect_analyze_loop_costing (loop_vec_info loop_vinfo,
 		= LOOP_VINFO_PEELING_FOR_GAPS (orig_loop_vinfo) ? 1 : 0;
 	      scalar_niters = ((scalar_niters - gap - prolog_peeling)
 			       % lowest_vf + gap);
-	      if (scalar_niters == 0)
-		{
-		  if (dump_enabled_p ())
-		    dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
-				     "not vectorized: loop never entered\n");
-		  return 0;
-		}
 	    }
 	}