Fix typo in `inputRank` check of `AtenBatchNormOp` (#1046)

The original conversion pattern for `AtenBatchNormOp` required that
the input rank be greater than 2; however, the only
expectation in the conversion pattern and in Pytorch is that the input
rank is greater than 1, since the second dimension of the input must
match the size of the `weight`, `bias`, `runningMean`, and
`runningVar` inputs. This commit fixes the `inputRank` check.

e2e_testing/torchscript/xfail_sets.py

@@ -93,6 +93,7 @@ TOSA_PASS_SET = {
     "TypePromotionAlphaWiderModule_basic",
     "Conv2dWithPaddingDilationStrideStaticModule_basic",
     "BatchNorm1DModule_basic",
+    "BatchNorm1DWith2DInputModule_basic",
     "BatchNorm2DModule_basic",
     "BatchNorm3DModule_basic",
     "FlattenStaticModule_basic",

lib/Conversion/TorchToLinalg/Uncategorized.cpp

@@ -1134,9 +1134,9 @@ public:
     auto runningVarType = runningVar.getType().cast<RankedTensorType>();
 
     auto inputRank = inputType.getRank();
-    if (inputRank <= 2)
+    if (inputRank < 2)
       return rewriter.notifyMatchFailure(
-          op, "input should have rank larger than 2");
+          op, "input should have rank larger than 1");
 
     if (weightType.getRank() != 1 || biasType.getRank() != 1 ||
         runningMeanType.getRank() != 1 || runningVarType.getRank() != 1) {

python/torch_mlir_e2e_test/test_suite/norm_like.py

@@ -37,6 +37,32 @@ def BatchNorm1DModule_basic(module, tu: TestUtils):
 
 # ==============================================================================
 
+class BatchNorm1DWith2DInputModule(torch.nn.Module):
+    def __init__(self):
+        super().__init__()
+        self.bn1d = torch.nn.BatchNorm1d(4)
+        self.bn1d.eval()
+        self.bn1d.running_mean = torch.tensor([0.5, 0.4, 0.3, 0.6])
+        self.bn1d.running_var = torch.tensor([3.0, 2.0, 4.0, 5.0])
+        self.bn1d.weight = torch.nn.Parameter(
+            torch.tensor([3.0, 2.0, 4.0, 5.0]))
+        self.bn1d.bias = torch.nn.Parameter(torch.tensor([0.5, 0.4, 0.3, 0.6]))
+
+    @export
+    @annotate_args([
+        None,
+        ([10, 4], torch.float32, True),
+    ])
+    def forward(self, x):
+        return self.bn1d(x)
+
+
+@register_test_case(module_factory=lambda: BatchNorm1DWith2DInputModule())
+def BatchNorm1DWith2DInputModule_basic(module, tu: TestUtils):
+    module.forward(tu.rand(10, 4))
+
+# ==============================================================================
+
 class BatchNorm2DModule(torch.nn.Module):
     def __init__(self):
         super().__init__()