ira-int.h (ira_allocno): Mark hard_regno as signed.

gcc/
2014-10-03  David Sherwood  <david.sherwood@arm.com>

	* ira-int.h (ira_allocno): Mark hard_regno as signed.

From-SVN: r215842

gcc/ChangeLog

+2014-10-03  David Sherwood  <david.sherwood@arm.com>
+
+	* ira-int.h (ira_allocno): Mark hard_regno as signed.
+
 2014-10-03  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* lra-constraints.c (inherit_in_ebb): Handle calls with

gcc/ira-int.h

@@ -318,7 +318,7 @@ struct ira_allocno
      number (0, ...) - 2.  Value -1 is used for allocnos spilled by the
      reload (at this point pseudo-register has only one allocno) which
      did not get stack slot yet.  */
-  int hard_regno : 16;
+  signed int hard_regno : 16;
   /* Allocnos with the same regno are linked by the following member.
      Allocnos corresponding to inner loops are first in the list (it
      corresponds to depth-first traverse of the loops).  */