[libcxx-commits] [libcxx] [libc++] Optimize std::find if types are integral and have the same signedness (PR #70345)

[Louis Dionne via libcxx-commits]

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@@ -162,6 +163,39 @@ void test_deque() {
   }
 }
 
+template <class T>
+struct TestIntegerPromotions1 {
+  template <class U>
+  TEST_CONSTEXPR_CXX20 void test(T val, U to_find) {
+    bool expect_match = val == to_find;
+    assert(std::find(&val, &val + 1, to_find) == (expect_match ? &val : &val + 1));
+  }
+
+  template <class U>
+  TEST_CONSTEXPR_CXX20 void operator()() {
+    test<U>(0, 0);
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ldionne wrote:

We should test with other values than `0`.

https://github.com/llvm/llvm-project/pull/70345