Test updates for LLVM18

tests/std/include/test_format_support.hpp

@@ -70,7 +70,7 @@ template <typename CharT>
 struct testing_callbacks {
     std::_Fmt_align expected_alignment = std::_Fmt_align::_None;
     std::_Fmt_sign expected_sign       = std::_Fmt_sign::_None;
-    std::basic_string_view<CharT> expected_fill;
+    std::basic_string_view<CharT> expected_fill{};
     int expected_width                     = -1;
     std::size_t expected_dynamic_width     = static_cast<std::size_t>(-1);
     bool expected_auto_dynamic_width       = false;

tests/std/tests/GH_000431_equal_family/test.cpp

@@ -244,7 +244,11 @@ void test_algorithms(EqualFn equal_fn) {
         assert(equal_fn(begin(arr2), end(arr2), begin(arr3), end(arr3), equal_to<short>{}));
         assert(equal_fn(begin(arr2), end(arr2), begin(arr3), end(arr3), equal_to<int>{}));
 
+#if !_HAS_CXX23
+        // The return type of equal_to<void>::operator(T, U) SFINAES
+        // when T and U are different enumeration types.
         assert(equal_fn(begin(arr3), end(arr3), begin(arr4), end(arr4), equal_to<>{}));
+#endif // !_HAS_CXX23
         assert(equal_fn(begin(arr3), end(arr3), begin(arr4), end(arr4), equal_to<short>{}));
         assert(equal_fn(begin(arr3), end(arr3), begin(arr4), end(arr4), equal_to<int>{}));
     }

tests/std/tests/GH_000935_complex_numerical_accuracy/test.cpp

@@ -1,6 +1,10 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wnan-infinity-disabled"
+#endif // __clang__
+
 #include <cassert>
 #include <complex>
 #include <limits>

tests/std/tests/P0355R7_calendars_and_time_zones_formatting/test.cpp

@@ -46,7 +46,7 @@ template <typename CharT>
 template <typename CharT>
 struct testing_callbacks {
     _Fmt_align expected_alignment = _Fmt_align::_None;
-    basic_string_view<CharT> expected_fill;
+    basic_string_view<CharT> expected_fill{};
     int expected_width                   = -1;
     size_t expected_dynamic_width        = static_cast<size_t>(-1);
     bool expected_auto_dynamic_width     = false;

tests/std/tests/P0896R4_ranges_iterator_machinery/test.cpp

@@ -1943,15 +1943,15 @@ namespace iter_ops {
         std::random_access_iterator_tag;
 
     struct trace {
-        unsigned int compares_;
-        unsigned int differences_;
-        unsigned int increments_;
-        unsigned int decrements_;
-        unsigned int assignments_;
-        unsigned int seeks_;
-        unsigned int sizes_;
-        unsigned int begins_;
-        unsigned int ends_;
+        unsigned int compares_    = 0;
+        unsigned int differences_ = 0;
+        unsigned int increments_  = 0;
+        unsigned int decrements_  = 0;
+        unsigned int assignments_ = 0;
+        unsigned int seeks_       = 0;
+        unsigned int sizes_       = 0;
+        unsigned int begins_      = 0;
+        unsigned int ends_        = 0;
 
         bool operator==(trace const&) const = default;
     };

tests/std/tests/P2093R14_formatted_output/test.cpp

@@ -153,10 +153,10 @@ namespace test {
     public:
         // Construct a new semaphore in the parent process.
         win_semaphore() {
-            SECURITY_ATTRIBUTES semaphore_attributes{
-                .nLength        = sizeof(SECURITY_ATTRIBUTES),
-                .bInheritHandle = TRUE, // The child process will inherit this handle.
-            };
+            SECURITY_ATTRIBUTES semaphore_attributes{};
+            semaphore_attributes.nLength        = sizeof(SECURITY_ATTRIBUTES);
+            semaphore_attributes.bInheritHandle = TRUE; // The child process will inherit this handle.
+
             m_handle = CreateSemaphoreW(&semaphore_attributes, 0, 1, nullptr);
             assert(m_handle != nullptr);
         }
@@ -648,11 +648,10 @@ int main(int argc, char* argv[]) {
 
             // The entire purpose of this code is to hide the child process's console window,
             // to avoid rapid flickering during test runs.
-            STARTUPINFOW startup_info{
-                .cb          = sizeof(STARTUPINFOW),
-                .dwFlags     = STARTF_USESHOWWINDOW,
-                .wShowWindow = SW_HIDE,
-            };
+            STARTUPINFOW startup_info{};
+            startup_info.cb          = sizeof(STARTUPINFOW);
+            startup_info.dwFlags     = STARTF_USESHOWWINDOW;
+            startup_info.wShowWindow = SW_HIDE;
 
             constexpr BOOL inherit_handles = TRUE;
 

tests/std/tests/floating_point_model_matrix.lst

@@ -29,6 +29,6 @@ ASAN	PM_CL="/O2 /MD /permissive- -fsanitize=address /Zi" PM_LINK="/debug"
 PM_CL="/O2 /MT /GL"
 ASAN	PM_CL="/O2 /MT /GL -fsanitize=address /Zi" PM_LINK="/debug"
 # TRANSITION, -Wno-unused-command-line-argument is needed for the internal test harness
-PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-overriding-t-option /Od /MTd"
-PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-overriding-t-option /O2 /MT"
-PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-overriding-t-option /O2 /MD /Oi-"
+PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-unknown-warning-option -Wno-overriding-t-option -Wno-overriding-option /Od /MTd"
+PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-unknown-warning-option -Wno-overriding-t-option -Wno-overriding-option /O2 /MT"
+PM_COMPILER="clang-cl" PM_CL="-fno-ms-compatibility -fno-delayed-template-parsing -Wno-unqualified-std-cast-call -Wno-unused-command-line-argument -Wno-unknown-warning-option -Wno-overriding-t-option -Wno-overriding-option /O2 /MD /Oi-"