HACK glsl: Write defaults to unused generic attributes

src/shader_recompiler/backend/glsl/emit_context.cpp

@@ -110,8 +110,11 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
         header += fmt::format("layout(location={})out vec4 frag_color{};", index, index);
     }
     for (size_t index = 0; index < info.stores_generics.size(); ++index) {
-        if (info.stores_generics[index]) {
-            header += fmt::format("layout(location={}) out vec4 out_attr{};", index, index);
+        // TODO: Properly resolve attribute issues
+        const auto declaration{
+            fmt::format("layout(location={}) out vec4 out_attr{};", index, index)};
+        if (info.stores_generics[index] || stage == Stage::VertexA || stage == Stage::VertexB) {
+            header += declaration;
         }
     }
     DefineConstantBuffers(bindings);

src/shader_recompiler/backend/glsl/emit_glsl.cpp

@@ -209,6 +209,12 @@ std::string EmitGLSL(const Profile& profile, const RuntimeInfo& runtime_info, IR
     ctx.header += "void main(){\n";
     if (program.stage == Stage::VertexA || program.stage == Stage::VertexB) {
         ctx.header += "gl_Position = vec4(0.0f, 0.0f, 0.0f, 1.0f);";
+        // TODO: Properly resolve attribute issues
+        for (size_t index = 0; index < program.info.stores_generics.size() / 2; ++index) {
+            if (!program.info.stores_generics[index]) {
+                ctx.header += fmt::format("out_attr{}=vec4(0,0,0,1);", index);
+            }
+        }
     }
     DefineVariables(ctx, ctx.header);
     if (ctx.uses_cc_carry) {