shader_recompiler: remove barriers in conditional control flow when device lacks support

src/video_core/renderer_opengl/gl_device.cpp

@@ -201,6 +201,7 @@ Device::Device(Core::Frontend::EmuWindow& emu_window) {
     use_asynchronous_shaders = Settings::values.use_asynchronous_shaders.GetValue() &&
                                !(is_amd || (is_intel && !is_linux)) && !strict_context_required;
     use_driver_cache = is_nvidia;
+    supports_conditional_barriers = !is_intel;
 
     LOG_INFO(Render_OpenGL, "Renderer_VariableAOFFI: {}", has_variable_aoffi);
     LOG_INFO(Render_OpenGL, "Renderer_ComponentIndexingBug: {}", has_component_indexing_bug);

src/video_core/renderer_opengl/gl_device.h

@@ -188,6 +188,10 @@ public:
         return strict_context_required;
     }
 
+    bool SupportsConditionalBarriers() const {
+        return supports_conditional_barriers;
+    }
+
 private:
     static bool TestVariableAoffi();
     static bool TestPreciseBug();
@@ -233,6 +237,7 @@ private:
     bool has_bool_ref_bug{};
     bool can_report_memory{};
     bool strict_context_required{};
+    bool supports_conditional_barriers{};
 
     std::string vendor_name;
 };

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -238,6 +238,7 @@ ShaderCache::ShaderCache(RasterizerOpenGL& rasterizer_, Core::Frontend::EmuWindo
           .support_snorm_render_buffer = false,
           .support_viewport_index_layer = device.HasVertexViewportLayer(),
           .support_geometry_shader_passthrough = device.HasGeometryShaderPassthrough(),
+          .support_conditional_barrier = device.SupportsConditionalBarriers(),
       } {
     if (use_asynchronous_shaders) {
         workers = CreateWorkers();