re PR rtl-optimization/59649 (BImode miscompiled)

	PR rtl-optimization/59649
	* stor-layout.c (get_mode_bounds): For BImode return
	0 and STORE_FLAG_VALUE.

From-SVN: r206422

gcc/ChangeLog

+2014-01-08  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/59649
+	* stor-layout.c (get_mode_bounds): For BImode return
+	0 and STORE_FLAG_VALUE.
+
 2014-01-08  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/59630

gcc/stor-layout.c

@@ -2821,7 +2821,21 @@ get_mode_bounds (enum machine_mode mode, int sign,
 
   gcc_assert (size <= HOST_BITS_PER_WIDE_INT);
 
-  if (sign)
+  /* Special case BImode, which has values 0 and STORE_FLAG_VALUE.  */
+  if (mode == BImode)
+    {
+      if (STORE_FLAG_VALUE < 0)
+	{
+	  min_val = STORE_FLAG_VALUE;
+	  max_val = 0;
+	}
+      else
+	{
+	  min_val = 0;
+	  max_val = STORE_FLAG_VALUE;
+	}
+    }
+  else if (sign)
     {
       min_val = -((unsigned HOST_WIDE_INT) 1 << (size - 1));
       max_val = ((unsigned HOST_WIDE_INT) 1 << (size - 1)) - 1;