[Inductor][WIndows] Fix Windows test case failure. (#161497)

Fixes windows test case failures:
- TritonCodeGenTests.test_inductor_sequence_nr
- TritonCodeGenTests.test_indirect_device_assert
- CompiledOptimizerTests.test_static_address_finalizer

Pull Request resolved: https://github.com/pytorch/pytorch/pull/161497
Approved by: https://github.com/jansel

test/inductor/indirect_assert_helper.py

@@ -73,7 +73,10 @@ if __name__ == "__main__":
         shape = (y.numel(),) + x.shape[2:]
         z = torch.randn(shape, device=GPU_TYPE)
         fn(x, y, z)
+        # On Windows, Python will optimize away a function call if its updated value is not used.
+        # Touch the memory of x so that the fn(x, y, z) will not be optimized away
+        print(x)
     elif fn_name in ("upper1", "upper2", "lower1", "lower2"):
-        fn(x)
+        print(fn(x))
     else:
-        fn(x, y)
+        print(fn(x, y))

test/inductor/test_compiled_optimizers.py

@@ -58,7 +58,7 @@ from torch.testing._internal.common_optimizers import (
     optim_db,
     optims,
 )
-from torch.testing._internal.common_utils import parametrize
+from torch.testing._internal.common_utils import parametrize, skipIfWindows
 from torch.testing._internal.inductor_utils import (
     GPU_TYPE,
     HAS_CPU,
@@ -731,6 +731,7 @@ class CompiledOptimizerTests(TestCase):
         SGD, kernel_count=1, lr=0.01, foreach=True
     )
 
+    @skipIfWindows
     @requires_gpu
     def test_static_address_finalizer(self):
         import gc

torch/_inductor/scheduler.py

@@ -611,6 +611,9 @@ class BaseSchedulerNode:
                     + stack_trace_last_line.replace("{", "{{")
                     .replace("}", "}}")
                     .replace("\n", "\\")
+                    .replace(
+                        "\\", "\\\\"
+                    )  # For windows safe path, avoid for example \x, \U.
                 )
                 out_lines.append("#pragma CMT END ORIGIN")
                 out_lines.append("")