Add the shark compile downstream due to pytorch/pytorch#104185 (comment)

 (#1615)

shark/__init__.py

@@ -0,0 +1,28 @@
+import importlib
+import logging
+
+from torch._dynamo import register_backend
+
+log = logging.getLogger(__name__)
+
+
+@register_backend
+def shark(model, inputs, *, options):
+    try:
+        from shark.dynamo_backend.utils import SharkBackend
+    except ImportError:
+        log.exception(
+            "Unable to import SHARK - High Performance Machine Learning Distribution"
+            "Please install the right version of SHARK that matches the PyTorch version being used. "
+            "Refer to https://github.com/nod-ai/SHARK/ for details."
+        )
+        raise
+    return SharkBackend(model, inputs, options)
+
+
+def has_shark():
+    try:
+        importlib.import_module("shark")
+        return True
+    except ImportError:
+        return False

shark/examples/shark_dynamo/basic_examples.py

@@ -1,70 +1,25 @@
 import torch
-import torch_mlir
-import torch._dynamo as torchdynamo
-from shark.sharkdynamo.utils import make_shark_compiler
+import shark
 
 
-import warnings, logging
+def foo(x, a):
+    if x.shape[0] > 3:
+        return x + a
+    else:
+        return x + 3
 
-warnings.simplefilter("ignore")
-torchdynamo.config.log_level = logging.ERROR
 
+shark_options = {"device": "cpu"}
+compiled = torch.compile(foo, backend="shark", options=shark_options)
 
-torchdynamo.reset()
+input = torch.ones(4)
 
+x = compiled(input, input)
 
-@torchdynamo.optimize(
-    make_shark_compiler(use_tracing=False, device="cuda", verbose=False)
-)
-def foo(t):
-    return 2 * t
-
-
-example_input = torch.rand((2, 3))
-x = foo(example_input)
 print(x)
 
+input = torch.ones(3)
 
-torchdynamo.reset()
-
-
-@torchdynamo.optimize(
-    make_shark_compiler(use_tracing=False, device="cuda", verbose=False)
-)
-def foo(a, b):
-    x = a / (a + 1)
-    if b.sum() < 0:
-        b = b * -1
-    return x * b
-
-
-print(foo(torch.rand((2, 3)), -torch.rand((2, 3))))
-
-
-torchdynamo.reset()
-
+x = compiled(input, input)
 
-@torchdynamo.optimize(
-    make_shark_compiler(use_tracing=False, device="cuda", verbose=True)
-)
-def foo(a):
-    for i in range(10):
-        a += 1.0
-    return a
-
-
-print(foo(torch.rand((1, 2))))
-
-torchdynamo.reset()
-
-
-@torchdynamo.optimize(
-    make_shark_compiler(use_tracing=False, device="cuda", verbose=True)
-)
-def test_unsupported_types(t, y):
-    return t, 2 * y
-
-
-str_input = "hello"
-tensor_input = torch.randn(2)
-print(test_unsupported_types(str_input, tensor_input))
+print(x)