[Add] torch_xla support in pipeline_sana.py

Author: SahilCarterr

src/diffusers/pipelines/sana/pipeline_sana.py

@@ -31,6 +31,7 @@
     USE_PEFT_BACKEND,
     is_bs4_available,
     is_ftfy_available,
+    is_torch_xla_available,
     logging,
     replace_example_docstring,
     scale_lora_layers,
@@ -46,6 +47,13 @@
 from .pipeline_output import SanaPipelineOutput
 
 
+if is_torch_xla_available():
+    import torch_xla.core.xla_model as xm
+
+    XLA_AVAILABLE = True
+else:
+    XLA_AVAILABLE = False
+
 logger = logging.get_logger(__name__)  # pylint: disable=invalid-name
 
 if is_bs4_available():
@@ -864,6 +872,9 @@ def __call__(
                 if i == len(timesteps) - 1 or ((i + 1) > num_warmup_steps and (i + 1) % self.scheduler.order == 0):
                     progress_bar.update()
 
+                if XLA_AVAILABLE:
+                    xm.mark_step()
+
         if output_type == "latent":
             image = latents
         else: