[gcc r17-3485] c++: testsuite: fix cpp0x/initlist135.C portability

https://gcc.gnu.org/g:2bb0802bf844915658a87595aaa186d2ed787006

commit r17-3485-g2bb0802bf844915658a87595aaa186d2ed787006
Author: Patrick Palka <[email protected]>
Date:   Thu Aug 20 21:42:41 2026 -0400

    c++: testsuite: fix cpp0x/initlist135.C portability
    
    The inline definition of std::initializer_list in this testcase is not
    what the compiler expects on i686 due to over-reduction of the original
    testcase.  Better to just include <initializer_list> instead.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/cpp0x/initlist135.C: Include <initializer_list> and
            remove the inline definition of std::initializer_list.

Diff:
---
 gcc/testsuite/g++.dg/cpp0x/initlist135.C | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist135.C b/gcc/testsuite/g++.dg/cpp0x/initlist135.C
index 759ff6833a2e..8dda882f8d5d 100644
--- a/gcc/testsuite/g++.dg/cpp0x/initlist135.C
+++ b/gcc/testsuite/g++.dg/cpp0x/initlist135.C
@@ -1,14 +1,9 @@
 // PR c++/126472
 // { dg-do run { target c++11 } }
 
+#include <initializer_list>
+
 namespace std {
-template <class _E> struct initializer_list {
-  typedef const _E *const_iterator;
-  const _E *_M_array;
-  unsigned long _M_len;
-  const_iterator begin() const { return _M_array; }
-  const_iterator end() const { return begin() + _M_len; }
-};
 struct _Optional_payload_base {
   struct _Storage {
     constexpr _Storage() : _M_empty() {}