From: Richard Biener <rguenther@suse.de>
Date: Tue, 4 Jul 2023 08:37:53 +0000 (+0200)
Subject: Remove unnecessary check on scalar_niter == 0
X-Git-Tag: basepoints/gcc-15~7847
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6eea7eaf11e2b04670c4bb75f48600747dd76768;p=thirdparty%2Fgcc.git

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 --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index e504645f1dfa..3b46c58a8d8a 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;
-		}
 	    }
 	}