[libc++][test] Don't use __libcpp_is_constant_evaluated in tests (#72226)

Author: cpplearner

libcxx/test/support/asan_testing.h

@@ -19,7 +19,7 @@ extern "C" int __sanitizer_verify_contiguous_container
 template <typename T, typename Alloc>
 TEST_CONSTEXPR bool is_contiguous_container_asan_correct ( const std::vector<T, Alloc> &c )
 {
-    if (std::__libcpp_is_constant_evaluated())
+    if (TEST_IS_CONSTANT_EVALUATED)
         return true;
     if (std::is_same<Alloc, std::allocator<T> >::value && c.data() != NULL)
         return __sanitizer_verify_contiguous_container(

libcxx/test/support/min_allocator.h

@@ -464,14 +464,14 @@ class safe_allocator {
 
   TEST_CONSTEXPR_CXX20 T* allocate(std::size_t n) {
     T* memory = std::allocator<T>().allocate(n);
-    if (!std::__libcpp_is_constant_evaluated())
+    if (!TEST_IS_CONSTANT_EVALUATED)
       std::memset(memory, 0, sizeof(T) * n);
 
     return memory;
   }
 
   TEST_CONSTEXPR_CXX20 void deallocate(T* p, std::size_t n) {
-    if (!std::__libcpp_is_constant_evaluated())
+    if (!TEST_IS_CONSTANT_EVALUATED)
       DoNotOptimize(std::memset(p, 0, sizeof(T) * n));
     std::allocator<T>().deallocate(p, n);
   }