fix false alphakill flags when texture fetch is optimized away

rpcs3/Emu/RSX/Common/ShaderParam.h

@@ -110,6 +110,17 @@ struct ParamArray
 		return nullptr;
 	}
 
+	bool HasParamTypeless(const ParamFlag flag, const std::string& name)
+	{
+		for (u32 i = 0; i<params[flag].size(); ++i)
+		{
+			if (params[flag][i].SearchName(name))
+				return true;
+		}
+
+		return false;
+	}
+
 	bool HasParam(const ParamFlag flag, std::string type, const std::string& name)
 	{
 		ParamType* t = SearchParam(flag, type);

rpcs3/Emu/RSX/D3D12/D3D12FragmentProgramDecompiler.cpp

@@ -348,8 +348,12 @@ void D3D12FragmentDecompiler::insertMainEnd(std::stringstream & OS)
 		{
 			if (m_prog.textures_alpha_kill[index])
 			{
-				std::string fetch_texture = insert_texture_fetch(m_prog, index) + ".a";
+				const std::string texture_name = "tex" + index;
-				OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				if (m_parr.HasParamTypeless(PF_PARAM_NONE, texture_name))
+				{
+					std::string fetch_texture = insert_texture_fetch(m_prog, index) + ".a";
+					OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				}
 			}
 		}
 

rpcs3/Emu/RSX/GL/GLFragmentProgram.cpp

@@ -370,8 +370,12 @@ void GLFragmentDecompilerThread::insertMainEnd(std::stringstream & OS)
 		{
 			if (m_prog.textures_alpha_kill[index])
 			{
-				std::string fetch_texture = insert_texture_fetch(m_prog, index) + ".a";
+				const std::string texture_name = "tex" + index;
-				OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				if (m_parr.HasParamTypeless(PF_PARAM_NONE, texture_name))
+				{
+					std::string fetch_texture = insert_texture_fetch(m_prog, index) + ".a";
+					OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				}
 			}
 		}
 

rpcs3/Emu/RSX/VK/VKFragmentProgram.cpp

@@ -373,8 +373,12 @@ void VKFragmentDecompilerThread::insertMainEnd(std::stringstream & OS)
 		{
 			if (m_prog.textures_alpha_kill[index])
 			{
-				std::string fetch_texture = vk::insert_texture_fetch(m_prog, index) + ".a";
+				const std::string texture_name = "tex" + index;
-				OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				if (m_parr.HasParamTypeless(PF_PARAM_NONE, texture_name))
+				{
+					std::string fetch_texture = vk::insert_texture_fetch(m_prog, index) + ".a";
+					OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
+				}
 			}
 		}