nios2.c (nios2_emit_stack_limit_check): Fix uninitialized-variable warning.

2015-07-16  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.c (nios2_emit_stack_limit_check): Fix
	uninitialized-variable warning.

From-SVN: r225857

gcc/ChangeLog

+2015-07-16  Sandra Loosemore  <sandra@codesourcery.com>
+
+	* config/nios2/nios2.c (nios2_emit_stack_limit_check): Fix
+	uninitialized-variable warning.
+
 2015-07-16  Kaz Kojima  <kkojima@gcc.gnu.org>
 
 	PR target/65249

gcc/config/nios2/nios2.c

@@ -563,7 +563,7 @@ nios2_create_cfa_notes (rtx_insn *insn, bool epilogue_p)
 static void
 nios2_emit_stack_limit_check (int size)
 {
-  rtx sum;
+  rtx sum = NULL_RTX;
 
   if (GET_CODE (stack_limit_rtx) == SYMBOL_REF)
     {