[committed] libstdc++: Fix some -Wsign-compare warnings in the testsuite

[Jonathan Wakely]

libstdc++-v3/ChangeLog:

        * testsuite/23_containers/unordered_map/modifiers/reserve.cc:
        Cast to size_t to fix -Wsign-compare warning.
        * testsuite/23_containers/unordered_set/hash_policy/71181.cc:
        Likewise.
        * testsuite/23_containers/unordered_set/insert/move_range.cc:
        Likewise.
---

Tested x86_64-linux. Pushed to trunk.

 .../testsuite/23_containers/unordered_map/modifiers/reserve.cc  | 2 +-
 .../testsuite/23_containers/unordered_set/hash_policy/71181.cc  | 2 +-
 .../testsuite/23_containers/unordered_set/insert/move_range.cc  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git 
a/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc 
b/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
index dc92b72c333..8b6f60c8ae8 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
@@ -40,7 +40,7 @@ void test01()
       m.reserve(bkts);
       VERIFY( m.bucket_count() == bkts );
 
-      for (++i; i < bkts; ++i)
+      for (++i; size_t(i) < bkts; ++i)
        {
          m.insert(std::make_pair(i, i));
 
diff --git 
a/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/71181.cc 
b/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/71181.cc
index f6e84544cd0..c378a64410c 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/71181.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/71181.cc
@@ -30,7 +30,7 @@ template<typename _USet>
     auto bkts = us.bucket_count();
     for (int nb_insert = 1; nb_insert <= threshold; ++nb_insert)
       {
-       if (nb_insert > nb_reserved)
+       if (size_t(nb_insert) > nb_reserved)
          {
            nb_reserved = bkts;
            us.reserve(nb_reserved);
diff --git 
a/libstdc++-v3/testsuite/23_containers/unordered_set/insert/move_range.cc 
b/libstdc++-v3/testsuite/23_containers/unordered_set/insert/move_range.cc
index 2431723bb1d..fa25b0a0e0c 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_set/insert/move_range.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/insert/move_range.cc
@@ -39,7 +39,7 @@ void test01()
           std::make_move_iterator(ref.end()));
 
   VERIFY( s.size() == ref.size() );
-  VERIFY( counter_type::move_count == ref.size() );
+  VERIFY( size_t(counter_type::move_count) == ref.size() );
 }
 
 int main()
-- 
2.47.1