[gcc r12-5481] libstdc++: Add effective-target for std::allocator implementation

[gcc r12-5481] libstdc++: Add effective-target for std::allocator implementation

[Jonathan Wakely]

https://gcc.gnu.org/g:39de0e541107bc4b0b3b82f613054f59c6821eb5

commit r12-5481-g39de0e541107bc4b0b3b82f613054f59c6821eb5
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Nov 22 14:51:16 2021 +0000

    libstdc++: Add effective-target for std::allocator implementation
    
    This allows tests to be skipped if the std::allocator implementation is
    not __gnu_cxx::new_allocator.
    
    The 20_util/allocator/overaligned.cc test requires either C++17 or
    new_allocator, otherwise we can't guarantee to return overaligned
    memory.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/18_support/50594.cc: Check effective target.
            * testsuite/20_util/allocator/1.cc: Likewise.
            * testsuite/20_util/allocator/overaligned.cc: Likewise.
            * testsuite/23_containers/unordered_map/96088.cc: Likewise.
            * testsuite/23_containers/unordered_multimap/96088.cc: Likewise.
            * testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
            * testsuite/23_containers/unordered_set/96088.cc: Likewise.
            * testsuite/ext/throw_allocator/check_delete.cc: Likewise.
            * testsuite/ext/throw_allocator/check_new.cc: Likewise.
            * testsuite/lib/libstdc++.exp (check_effective_target_std_allocator_new):
            Define new proc.

Diff:
---
 libstdc++-v3/testsuite/18_support/50594.cc                       | 1 +
 libstdc++-v3/testsuite/20_util/allocator/1.cc                    | 7 +++----
 libstdc++-v3/testsuite/20_util/allocator/overaligned.cc          | 2 +-
 libstdc++-v3/testsuite/23_containers/unordered_map/96088.cc      | 1 +
 libstdc++-v3/testsuite/23_containers/unordered_multimap/96088.cc | 1 +
 libstdc++-v3/testsuite/23_containers/unordered_multiset/96088.cc | 1 +
 libstdc++-v3/testsuite/23_containers/unordered_set/96088.cc      | 1 +
 libstdc++-v3/testsuite/ext/throw_allocator/check_delete.cc       | 1 +
 libstdc++-v3/testsuite/ext/throw_allocator/check_new.cc          | 1 +
 libstdc++-v3/testsuite/lib/libstdc++.exp                         | 8 ++++++++
 10 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/libstdc++-v3/testsuite/18_support/50594.cc b/libstdc++-v3/testsuite/18_support/50594.cc
index a18e8278081..c15e704debe 100644
--- a/libstdc++-v3/testsuite/18_support/50594.cc
+++ b/libstdc++-v3/testsuite/18_support/50594.cc
@@ -1,5 +1,6 @@
 // { dg-options "-fwhole-program" }
 // { dg-additional-options "-static-libstdc++" { target *-*-mingw* } }
+// { dg-require-effective-target std_allocator_new }
 // { dg-xfail-run-if "AIX operator new" { powerpc-ibm-aix* } }
 
 // Copyright (C) 2011-2021 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/allocator/1.cc b/libstdc++-v3/testsuite/20_util/allocator/1.cc
index ebcd6c28c5f..79e223c13c2 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/1.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/1.cc
@@ -17,6 +17,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
+// { dg-require-effective-target std_allocator_new }
+
 // 20.4.1.1 allocator members
 
 #include <memory>
@@ -35,7 +37,7 @@ struct gnu { };
 bool check_new = false;
 bool check_delete = false;
 
-void* 
+void*
 operator new(std::size_t n) THROW(std::bad_alloc)
 {
   check_new = true;
@@ -59,9 +61,6 @@ void test01()
 {
   std::allocator<gnu> obj;
 
-  // NB: These should work for various size allocation and
-  // deallocations.  Currently, they only work as expected for sizes >
-  // _MAX_BYTES as defined in stl_alloc.h, which happes to be 128. 
   gnu* pobj = obj.allocate(256);
   VERIFY( check_new );
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator/overaligned.cc b/libstdc++-v3/testsuite/20_util/allocator/overaligned.cc
index fd03d62b238..8c90fcc0e92 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/overaligned.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/overaligned.cc
@@ -16,7 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-options "-faligned-new" }
-// { dg-do run { target c++11 } }
+// { dg-do run { target { c++11 && { c++17 || std_allocator_new } } } }
 // { dg-require-cstdint "" }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_map/96088.cc b/libstdc++-v3/testsuite/23_containers/unordered_map/96088.cc
index 83ca1c0afd6..27c499ed348 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_map/96088.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_map/96088.cc
@@ -1,4 +1,5 @@
 // { dg-do run { target c++17 } }
+// { dg-require-effective-target std_allocator_new }
 
 // Copyright (C) 2021 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_multimap/96088.cc b/libstdc++-v3/testsuite/23_containers/unordered_multimap/96088.cc
index de7f009dadc..eaadd08e7ca 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_multimap/96088.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multimap/96088.cc
@@ -1,4 +1,5 @@
 // { dg-do run { target c++17 } }
+// { dg-require-effective-target std_allocator_new }
 
 // Copyright (C) 2021 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_multiset/96088.cc b/libstdc++-v3/testsuite/23_containers/unordered_multiset/96088.cc
index b9bbf63b863..aa137ec9302 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_multiset/96088.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multiset/96088.cc
@@ -1,4 +1,5 @@
 // { dg-do run { target c++17 } }
+// { dg-require-effective-target std_allocator_new }
 
 // Copyright (C) 2021 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_set/96088.cc b/libstdc++-v3/testsuite/23_containers/unordered_set/96088.cc
index 83d5475c677..3f0835ce501 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_set/96088.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/96088.cc
@@ -1,4 +1,5 @@
 // { dg-do run { target c++17 } }
+// { dg-require-effective-target std_allocator_new }
 
 // Copyright (C) 2021 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/ext/throw_allocator/check_delete.cc b/libstdc++-v3/testsuite/ext/throw_allocator/check_delete.cc
index f5bc652c9dc..10e5c69edca 100644
--- a/libstdc++-v3/testsuite/ext/throw_allocator/check_delete.cc
+++ b/libstdc++-v3/testsuite/ext/throw_allocator/check_delete.cc
@@ -18,6 +18,7 @@
 
 // { dg-require-time "" }
 // { dg-require-cstdint "" }
+// { dg-require-effective-target std_allocator_new }
 
 #include <cstdlib>
 #include <ext/throw_allocator.h>
diff --git a/libstdc++-v3/testsuite/ext/throw_allocator/check_new.cc b/libstdc++-v3/testsuite/ext/throw_allocator/check_new.cc
index a4e3874d841..4e2a7250e32 100644
--- a/libstdc++-v3/testsuite/ext/throw_allocator/check_new.cc
+++ b/libstdc++-v3/testsuite/ext/throw_allocator/check_new.cc
@@ -18,6 +18,7 @@
 
 // { dg-require-time "" }
 // { dg-require-cstdint "" }
+// { dg-require-effective-target std_allocator_new }
 
 #include <cstdlib>
 #include <ext/throw_allocator.h>
diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp b/libstdc++-v3/testsuite/lib/libstdc++.exp
index 35ccbe47c39..4f4c78bed24 100644
--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
@@ -1338,6 +1338,14 @@ proc check_effective_target_net_ts_ip { } {
     }]
 }
 
+# Return 1 if libstdc++ was built as --enable-libstdcxx-allocator=new
+proc check_effective_target_std_allocator_new { } {
+    return [check_v3_target_prop_cached et_std_alloc_new {
+	set cond "_GLIBCXX_USE_ALLOCATOR_NEW"
+	return [v3_check_preprocessor_condition std_alloc_new $cond]
+    }]
+}
+
 set additional_prunes ""
 
 if { [info exists env(GCC_RUNTEST_PARALLELIZE_DIR)] \