re PR tree-optimization/64191 (indirect clobbers messes up dead code elimination…

re PR tree-optimization/64191 (indirect clobbers messes up dead code elimination in loop calling dtor)

2014-12-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/64191
	* tree-vect-stmts.c (vect_stmt_relevant_p): Clobbers are
	not relevant (nor are their uses).

From-SVN: r218509

gcc/ChangeLog

+2014-12-09  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/64191
+	* tree-vect-stmts.c (vect_stmt_relevant_p): Clobbers are
+	not relevant (nor are their uses).
+
 2014-12-09  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* lto/lto-partition.c (privatize_symbol_name): Correctly

gcc/tree-vect-stmts.c

@@ -340,7 +340,8 @@ vect_stmt_relevant_p (gimple stmt, loop_vec_info loop_vinfo,
 
   /* changing memory.  */
   if (gimple_code (stmt) != GIMPLE_PHI)
-    if (gimple_vdef (stmt))
+    if (gimple_vdef (stmt)
+	&& !gimple_clobber_p (stmt))
       {
 	if (dump_enabled_p ())
 	  dump_printf_loc (MSG_NOTE, vect_location,