On Thu, Nov 23, 2023 at 10:54:56AM +0000, Jonathan Wakely wrote:
> 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.
Ok, thanks.
> 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
Jakub
