spirv: Add fixed pipeline point size

src/shader_recompiler/backend/spirv/emit_context.cpp

@@ -495,7 +495,7 @@ void EmitContext::DefineOutputs(const Info& info) {
     if (info.stores_position || stage == Stage::VertexB) {
         output_position = DefineOutput(*this, F32[4], spv::BuiltIn::Position);
     }
-    if (info.stores_point_size) {
+    if (info.stores_point_size || profile.fixed_state_point_size) {
         if (stage == Stage::Fragment) {
             throw NotImplementedException("Storing PointSize in Fragment stage");
         }

src/shader_recompiler/backend/spirv/emit_spirv_special.cpp

@@ -17,6 +17,10 @@ void EmitPrologue(EmitContext& ctx) {
                 ctx.OpStore(generic_id, default_vector);
             }
         }
+        if (ctx.profile.fixed_state_point_size) {
+            const float point_size{*ctx.profile.fixed_state_point_size};
+            ctx.OpStore(ctx.output_point_size, ctx.Constant(ctx.F32[1], point_size));
+        }
     }
 }