[PATCH TEST]Drop xfail for gcc.dg/tree-ssa/pr71347.c

[Bin Cheng]

Hi,
With tree pre improvement @239414, test gcc.dg/tree-ssa/pr71347.c no longer 
xfails.  Given the change is target independent, I am dropping xfail of the 
test for all targets.

Thanks,
bin

gcc/testsuite/ChangeLog
2016-11-04  Bin Cheng  <bin.ch...@arm.com>

        * gcc.dg/tree-ssa/pr71347.c: Drop xfail.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr71347.c 
b/gcc/testsuite/gcc.dg/tree-ssa/pr71347.c
index 428e41b..d2f7f05 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr71347.c
+++ b/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" { xfail { 
ia64-*-* arm*-*-* m68k*-*-* } } } } */
+/* { dg-final { scan-tree-dump-not ".* = MEM.*;" "optimized" } } */