re PR tree-optimization/71347 (Performance drop after r235513 on x86-64 in 32-bit mode.)

	gcc/testsuite
	PR tree-optimization/71347
	* gcc.dg/tree-ssa/pr71347.c: XFAIL on ia64, arm, m68k and sparc.

From-SVN: r238366

gcc/testsuite/ChangeLog

+2016-07-15  Bin Cheng  <bin.cheng@arm.com>
+
+	PR tree-optimization/71347
+	* gcc.dg/tree-ssa/pr71347.c: XFAIL on ia64, arm, m68k and sparc.
+
 2016-07-14  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/29819

gcc/testsuite/gcc.dg/tree-ssa/pr71347.c

@@ -14,4 +14,4 @@ void foo (void)
 }
 
 /* Load of X[i - i] can be omitted by reusing X[i] in previous iteration.  */
-/* { dg-final { scan-tree-dump-not ".* = MEM.*;" "optimized"} } */
+/* { dg-final { scan-tree-dump-not ".* = MEM.*;" "optimized" { xfail { ia64-*-* arm*-*-* m68k*-*-* sparc*-*-* } } } } */