re PR other/51125 (FAIL: g++.dg/tm/pr45940-3.C)

	PR other/51125
	* trans-mem.c (expand_block_tm): Ignore clobbers.

From-SVN: r181619

gcc/ChangeLog

+2011-11-22  Michael Matz  <matz@suse.de>
+
+	PR other/51125
+	* trans-mem.c (expand_block_tm): Ignore clobbers.
+
 2011-11-22  Iain Sandoe  <iains@gcc.gnu.org>
 
 	*  config/darwin.h (ENDFILE_SPEC): New.

gcc/trans-mem.c

@@ -2333,7 +2333,8 @@ expand_block_tm (struct tm_region *region, basic_block bb)
 	{
 	case GIMPLE_ASSIGN:
 	  /* Only memory reads/writes need to be instrumented.  */
-	  if (gimple_assign_single_p (stmt))
+	  if (gimple_assign_single_p (stmt)
+	      && !gimple_clobber_p (stmt))
 	    {
 	      expand_assign_tm (region, &gsi);
 	      continue;