Reintroduce EvaluateBSDF_Area()

ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl

 
             while (i <= last && lightData.lightType == GPULIGHTTYPE_LINE)
             {
-                DirectLighting lighting = EvaluateBSDF_Line(context, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
+                lightData.lightType = GPULIGHTTYPE_LINE; // Enforce constant propagation
+
+                DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
                 AccumulateDirectLighting(lighting, aggregateLighting);
 
                 lightData = FetchLight(lightStart, min(++i, last));
             {
-                DirectLighting lighting = EvaluateBSDF_Rect(context, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
+                lightData.lightType = GPULIGHTTYPE_RECTANGLE; // Enforce constant propagation
+
+                DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
                 AccumulateDirectLighting(lighting, aggregateLighting);
 
                 lightData = FetchLight(lightStart, min(++i, last));

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

     return lighting;
 }
 
+DirectLighting EvaluateBSDF_Area(LightLoopContext lightLoopContext,
+                                 float3 V, PositionInputs posInput,
+                                 PreLightData preLightData, LightData lightData,
+                                 BSDFData bsdfData, BakeLightingData bakeLightingData)
+{
+    if (lightData.lightType == GPULIGHTTYPE_LINE)
+    {
+        return EvaluateBSDF_Line(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
+    }
+    else
+    {
+        return EvaluateBSDF_Rect(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, bakeLightingData);
+    }
+}
+
 //-----------------------------------------------------------------------------
 // EvaluateBSDF_Env
 // ----------------------------------------------------------------------------