[Vulkan] Vertex buffer residency caching

Cache vertex buffer address/size per fetch constant, invalidate on fetch
constant write, reset at frame boundaries

src/xenia/gpu/vulkan/vulkan_command_processor.h

@@ -738,6 +738,18 @@ class VulkanCommandProcessor final : public CommandProcessor {
   uint64_t current_float_constant_map_vertex_[4];
   uint64_t current_float_constant_map_pixel_[4];
 
+  // Vertex buffer residency caching - avoids redundant RequestRange calls.
+  // Bit is set when the vertex buffer at that index has been validated and
+  // is resident in shared memory with the current address/size.
+  uint64_t vertex_buffers_in_sync_[2] =
+      {};  // 96 bits for 96 vertex fetch constants
+  // Cached address and size for each vertex fetch constant to detect changes.
+  struct VertexBufferState {
+    uint32_t address = 0;
+    uint32_t size = 0;
+  };
+  std::array<VertexBufferState, 96> vertex_buffer_states_ = {};
+
   // System shader constants.
   SpirvShaderTranslator::SystemConstants system_constants_;