c++: Require C++11 for g++.dg/opt/pr110879.C [PR110879]

The _M_realloc_insert member does not have the trivial relocation
optimization for C++98, which seems to be why the _M_end_of_storage
member does not get optimized away. Make this test unsupported for
C++98.

gcc/testsuite/ChangeLog:

	PR libstdc++/110879
	* g++.dg/opt/pr110879.C: Require C++11 or later.

diff --git a/gcc/testsuite/g++.dg/opt/pr110879.C b/gcc/testsuite/g++.dg/opt/pr110879.C
index 7f0a0a80b8af4c8eba64825a5715b815b1ced3fa..57556605a511eb6adc4a7b41e6b621cb50680a67 100644 (file)
--- a/gcc/testsuite/g++.dg/opt/pr110879.C
+++ b/gcc/testsuite/g++.dg/opt/pr110879.C
@@ -1,4 +1,4 @@
-// { dg-do compile }
+// { dg-do compile { target c++11 } }
 // { dg-options "-O3 -fdump-tree-optimized" }
 
 #include <vector>