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libstdc++: Fix nodiscard warnings in performance tests 

libstdc++-v3/ChangeLog:

	* testsuite/performance/23_containers/sort_search/list.cc: Cast
	results to void to suppress -Wunused-result warnings from
	nodiscard functions.
	* testsuite/performance/25_algorithms/equal_deque_iterators.cc:
	Likewise.
	* testsuite/performance/25_algorithms/search_n.cc: Likewise.
This commit is contained in:
Jonathan Wakely 2025-11-27 15:54:44 +00:00 committed by Jonathan Wakely
parent 37e881b316
commit 7f355b11db
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3 changed files with 8 additions and 8 deletions
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2
libstdc++-v3/testsuite/performance/23_containers/sort_search/list.cc
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@ -34,7 +34,7 @@ template<typename Container, int Iter>
//Search for random values that may or may not belong to the list. //Search for random values that may or may not belong to the list.
for (int i = 0; i < 50; ++i) for (int i = 0; i < 50; ++i)
std::find(obj.begin(), obj.end(), rand() % 100001); (void) std::find(obj.begin(), obj.end(), rand() % 100001);
obj.sort(); obj.sort();

10
libstdc++-v3/testsuite/performance/25_algorithms/equal_deque_iterators.cc
View File

@ -34,7 +34,7 @@ int main()
start_counters(time, resource); start_counters(time, resource);
for (int i = 0; i < 1000; ++i) for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 3000; ++j) for (int j = 0; j < 3000; ++j)
std::equal(data.begin(), data.begin() + j, d.begin()); (void) std::equal(data.begin(), data.begin() + j, d.begin());
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "deque vs deque", time, resource); report_performance(__FILE__, "deque vs deque", time, resource);
clear_counters(time, resource); clear_counters(time, resource);
@ -44,7 +44,7 @@ int main()
start_counters(time, resource); start_counters(time, resource);
for (int i = 0; i < 1000; ++i) for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 3000; ++j) for (int j = 0; j < 3000; ++j)
std::equal(data.begin(), data.begin() + j, v.begin()); (void) std::equal(data.begin(), data.begin() + j, v.begin());
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "deque vs vector", time, resource); report_performance(__FILE__, "deque vs vector", time, resource);
clear_counters(time, resource); clear_counters(time, resource);
@ -54,7 +54,7 @@ int main()
start_counters(time, resource); start_counters(time, resource);
for (int i = 0; i < 1000; ++i) for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 3000; ++j) for (int j = 0; j < 3000; ++j)
std::equal(v.begin(), v.begin() + j, d.begin()); (void) std::equal(v.begin(), v.begin() + j, d.begin());
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "vector vs deque", time, resource); report_performance(__FILE__, "vector vs deque", time, resource);
clear_counters(time, resource); clear_counters(time, resource);
@ -64,7 +64,7 @@ int main()
start_counters(time, resource); start_counters(time, resource);
for (int i = 0; i < 1000; ++i) for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 3000; ++j) for (int j = 0; j < 3000; ++j)
std::equal(data.begin(), data.begin() + j, cv.begin()); (void) std::equal(data.begin(), data.begin() + j, cv.begin());
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "int deque vs char vector", time, resource); report_performance(__FILE__, "int deque vs char vector", time, resource);
clear_counters(time, resource); clear_counters(time, resource);
@ -74,7 +74,7 @@ int main()
start_counters(time, resource); start_counters(time, resource);
for (int i = 0; i < 1000; ++i) for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 3000; ++j) for (int j = 0; j < 3000; ++j)
std::equal(cv.begin(), cv.begin() + j, d.begin()); (void) std::equal(cv.begin(), cv.begin() + j, d.begin());
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "char vector vs int deque", time, resource); report_performance(__FILE__, "char vector vs int deque", time, resource);

4
libstdc++-v3/testsuite/performance/25_algorithms/search_n.cc
View File

@ -47,7 +47,7 @@ main(void)
__gnu_test::test_container<int, forward_iterator_wrapper> fcon(ary, ary + length); __gnu_test::test_container<int, forward_iterator_wrapper> fcon(ary, ary + length);
start_counters(time, resource); start_counters(time, resource);
for(int i = 0; i < 100; i++) for(int i = 0; i < 100; i++)
search_n(fcon.begin(), fcon.end(), 10, 1); (void) search_n(fcon.begin(), fcon.end(), 10, 1);
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "forward iterator", time, resource); report_performance(__FILE__, "forward iterator", time, resource);
clear_counters(time, resource); clear_counters(time, resource);
@ -55,7 +55,7 @@ main(void)
__gnu_test::test_container<int, random_access_iterator_wrapper> rcon(ary, ary + length); __gnu_test::test_container<int, random_access_iterator_wrapper> rcon(ary, ary + length);
start_counters(time, resource); start_counters(time, resource);
for(int i = 0; i < 100; i++) for(int i = 0; i < 100; i++)
search_n(rcon.begin(), rcon.end(), 10, 1); (void) search_n(rcon.begin(), rcon.end(), 10, 1);
stop_counters(time, resource); stop_counters(time, resource);
report_performance(__FILE__, "random access iterator", time, resource); report_performance(__FILE__, "random access iterator", time, resource);
clear_counters(time, resource); clear_counters(time, resource);