Suppress memcpy writing to an object with no trivial copy-assignment warnings

We need to copy padding in most of these cases, and the objects are trivially copyable; however, BitField prevents trivial copy-assignment.

Author: Pokechu22

Source/Core/Core/FifoPlayer/FifoPlayer.cpp

@@ -101,7 +101,14 @@ void FifoPlaybackAnalyzer::AnalyzeFrames(FifoDataFile* file,
         part_start = offset;
         // Copy cpmem now, because end_of_primitives isn't triggered until the first opcode after
         // primitive data, and the first opcode might update cpmem
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
         std::memcpy(&cpmem, &analyzer.m_cpmem, sizeof(CPState));
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
       }
       if (analyzer.m_end_of_primitives)
       {

Source/Core/Core/HW/MemoryInterface.cpp

@@ -150,7 +150,14 @@ void Init()
 {
   auto& state = Core::System::GetInstance().GetMemoryInterfaceState().GetData();
   static_assert(std::is_trivially_copyable_v<MIMemStruct>);
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   std::memset(&state.mi_mem, 0, sizeof(MIMemStruct));
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 }
 
 void Shutdown()

Source/Core/Core/HW/WiimoteEmu/DesiredWiimoteState.cpp

@@ -136,7 +136,14 @@ static bool DeserializeExtensionState(DesiredWiimoteState* state,
     return false;
   auto& e = state->extension.data.emplace<T>();
   static_assert(std::is_trivially_copyable_v<T>);
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   std::memcpy(&e, &serialized.data[offset], sizeof(T));
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
   return true;
 }
 

Source/Core/VideoCommon/CPMemory.cpp

@@ -17,7 +17,14 @@ CPState g_preprocess_cp_state;
 
 void CopyPreprocessCPStateFromMain()
 {
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   std::memcpy(&g_preprocess_cp_state, &g_main_cp_state, sizeof(CPState));
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 }
 
 std::pair<std::string, std::string> GetCPRegInfo(u8 cmd, u32 value)

Source/Core/VideoCommon/ShaderCache.cpp

@@ -608,7 +608,14 @@ AbstractPipelineConfig ShaderCache::GetGXPipelineConfig(
 static GXPipelineUid ApplyDriverBugs(const GXPipelineUid& in)
 {
   GXPipelineUid out;
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   memcpy(&out, &in, sizeof(out));  // copy padding
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
   pixel_shader_uid_data* ps = out.ps_uid.GetUidData();
   BlendingState& blend = out.blending_state;
 
@@ -778,7 +785,14 @@ ShaderCache::GetGXPipelineConfig(const GXPipelineUid& config_in)
 static GXUberPipelineUid ApplyDriverBugs(const GXUberPipelineUid& in)
 {
   GXUberPipelineUid out;
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   memcpy(&out, &in, sizeof(out));  // Copy padding
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
   if (g_ActiveConfig.backend_info.bSupportsDynamicVertexLoader)
     out.vertex_format = nullptr;
 

Source/Core/VideoCommon/VertexLoaderManager.cpp

@@ -153,7 +153,14 @@ NativeVertexFormat* GetUberVertexFormat(const PortableVertexDeclaration& decl)
   // The padding in the structs can cause the memcmp() in the map to create duplicates.
   // Avoid this by initializing the padding to zero.
   PortableVertexDeclaration new_decl;
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
+#endif
   std::memset(&new_decl, 0, sizeof(new_decl));
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
   new_decl.stride = decl.stride;
 
   auto MakeDummyAttribute = [](AttributeFormat& attr, ComponentFormat type, int components,