[gcc r11-4556] libstdc++: AIX xfail for_overwrite.cc testcase

[David Edelsohn]

https://gcc.gnu.org/g:dec1eb4c276f1b3c003154c159b539eb7110a13f

commit r11-4556-gdec1eb4c276f1b3c003154c159b539eb7110a13f
Author: David Edelsohn <dje.gcc@gmail.com>
Date:   Thu Oct 29 16:46:53 2020 -0400

    libstdc++: AIX xfail for_overwrite.cc testcase
    
    The 20_util/unique_ptr/creation/for_overwrite.cc testcase relies on
    operator new, which requires special features on AIX.  This patch
    disables the testcase.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: XFAIL on AIX.

Diff:
---
 libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
index e7231c2ac95..5827c6dcd5d 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
@@ -1,5 +1,6 @@
 // { dg-options "-std=gnu++20" }
 // { dg-do run { target c++2a } }
+// { dg-xfail-run-if "AIX operator new" { powerpc-ibm-aix* } }
 
 // Copyright (C) 2020 Free Software Foundation, Inc.
 //