re PR rtl-optimization/27468 (sign-extending Alpha instructions not exploited)

	PR target/27468
	* common/config/alpha/alpha-common.c (alpha_option_optimization_table):
	Enable flag_ree at -O2 or higher.

From-SVN: r182626

gcc/ChangeLog

+2011-12-22  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/27468
+	* common/config/alpha/alpha-common.c (alpha_option_optimization_table):
+	Enable flag_ree at -O2 or higher.
+
 2011-12-22  Richard Guenther  <rguenther@suse.de>
 
 	PR lto/51650

gcc/common/config/alpha/alpha-common.c

@@ -33,6 +33,8 @@ along with GCC; see the file COPYING3.  If not see
 static const struct default_options alpha_option_optimization_table[] =
   {
     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
+    /* Enable redundant extension instructions removal at -O2 and higher.  */
+    { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
     { OPT_LEVELS_NONE, 0, NULL, 0 }
   };