From patchwork Fri May 26 07:14:04 2017
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Date: Fri, 26 May 2017 09:14:04 +0200 (CEST)
From: Richard Biener <rguenther@suse.de>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH] Make sure to simplify CFG after OMP SIMD vectorization
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I noticed we keep the VF != 0 check in the CFG for quite some passes
when looking at PR80844 so the following fixes that.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2017-05-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/80844
	* tree-vectorizer.c (adjust_simduid_builtins): Propagate
	results.

Index: gcc/tree-vectorizer.c
===================================================================
--- gcc/tree-vectorizer.c	(revision 248409)
+++ gcc/tree-vectorizer.c	(working copy)
@@ -229,8 +229,11 @@ adjust_simduid_builtins (hash_table<simd
 	    default:
 	      gcc_unreachable ();
 	    }
-	  update_call_from_tree (&i, t);
-	  gsi_next (&i);
+	  tree lhs = gimple_call_lhs (stmt);
+	  if (lhs)
+	    replace_uses_by (lhs, t);
+	  release_defs (stmt);
+	  gsi_remove (&i, true);
 	}
     }
 }