-- v2: vkd3d-shader/ir: Check that SWITCH blocks are correctly nested. vkd3d-shader/ir: Check that REP blocks are correctly nested. vkd3d-shader/ir: Check that LOOP blocks are correctly nested. vkd3d-shader/ir: Check that IF blocks are correctly nested. vkd3d-shader/ir: Do not enfore DCL_TEMPS count for hull shaders. vkd3d-shader/ir: Emit an ERR() on validation errors.