Jakub noted in the PR that this test fails for -std=c++98.

Tested x86_64-linux.

OK for trunk?

-- >8 --

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.
---
 gcc/testsuite/g++.dg/opt/pr110879.C | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/g++.dg/opt/pr110879.C 
b/gcc/testsuite/g++.dg/opt/pr110879.C
index 7f0a0a80b8a..57556605a51 100644
--- 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>
-- 
2.42.0

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