Fix upsample_bilinear to respect align_corner argument

onnxscript/function_libs/torch_lib/ops/nn.py

@@ -2295,38 +2295,45 @@ def aten_upsample_bicubic2d_backward(
 @torch_op("aten::upsample_bilinear2d", trace_only=True)
 def aten_upsample_bilinear2d(
     self: TReal,
-    output_size: Optional[INT64] = None,
+    output_size: INT64,
+    align_corners: bool,
     scales_h: Optional[float] = None,
     scales_w: Optional[float] = None,
-    align_corners: bool = True,  # pylint: disable=unused-argument
 ) -> TReal:
     """upsample_bilinear2d(Tensor self, SymInt[2] output_size, bool align_corners, float? scales_h=None, float? scales_w=None) -> Tensor"""
 
+    coordinate_transformation_mode = "align_corners" if align_corners else "pytorch_half_pixel"
     if output_size is not None:
-        result = _aten_upsample_bilinear2d_output_size(self, output_size)
+        result = _aten_upsample_bilinear2d_output_size(
+            self, output_size, coordinate_transformation_mode
+        )
     else:
         assert scales_h is not None
         assert scales_h == scales_w, f"scale_h({scales_h}) != scale_w({scales_w})"
-        result = _aten_upsample_bilinear2d_scales(self, scales_h, scales_w)
+        result = _aten_upsample_bilinear2d_scales(
+            self, scales_h, scales_w, coordinate_transformation_mode
+        )
     return result
 
 
 @torch_op("aten::upsample_bilinear2d.vec", trace_only=True)
 def aten_upsample_bilinear2d_vec(
     self: TReal,
-    output_size: Optional[INT64] = None,
-    align_corners: bool = True,
-    scale_factors: Optional[Sequence[float]] = None,
+    output_size: Optional[INT64],
+    align_corners: bool,
+    scale_factors: Optional[Sequence[float]],
 ) -> TReal:
+    """upsample_bilinear2d.vec(Tensor input, SymInt[]? output_size, bool align_corners, float[]? scale_factors) -> Tensor"""
     scales_h = scale_factors[0] if scale_factors is not None else None
     scales_w = scale_factors[1] if scale_factors is not None else None
-    return aten_upsample_bilinear2d(self, output_size, scales_h, scales_w, align_corners)
+    return aten_upsample_bilinear2d(self, output_size, align_corners, scales_h, scales_w)
 
 
 @torch_op("aten::upsample_bilinear2d", private=True)
 def _aten_upsample_bilinear2d_output_size(
     self: TReal,
     output_size: INT64,
+    coordinate_transformation_mode: str,
 ) -> TReal:
     """upsample_bilinear2d(Tensor self, SymInt[2] output_size, bool align_corners, float? scales_h=None, float? scales_w=None) -> Tensor"""
 
@@ -2341,7 +2348,8 @@ def _aten_upsample_bilinear2d_output_size(
         None,
         output_size,
         mode="linear",
-        coordinate_transformation_mode="align_corners",
+        coordinate_transformation_mode=coordinate_transformation_mode,
+        nearest_mode="floor",
     )
 
 
@@ -2350,6 +2358,7 @@ def _aten_upsample_bilinear2d_scales(
     self: TReal,
     scales_h: float,
     scales_w: float,
+    coordinate_transformation_mode: str,
 ) -> TReal:
     """upsample_bilinear2d(Tensor self, SymInt[2] output_size, bool align_corners, float? scales_h=None, float? scales_w=None) -> Tensor"""
 
@@ -2366,7 +2375,8 @@ def _aten_upsample_bilinear2d_scales(
         scales,  # format should be: [1.0, 1.0, scale_h, scale_w]
         None,
         mode="linear",
-        coordinate_transformation_mode="align_corners",
+        coordinate_transformation_mode=coordinate_transformation_mode,
+        nearest_mode="floor",
     )
 
 

onnxscript/tests/function_libs/torch_lib/ops_test_data.py

@@ -418,9 +418,21 @@
 def _upsample_bilinear2d_input_wrangler(
     args: list[Any], kwargs: dict[str, Any]
 ) -> tuple[list[Any], dict[str, Any]]:
+    # Wrangler for the signature difference between
+    #   'nn.functional.upsample_bilinear'
+    # and
+    #   'aten::upsample_bilinear2d'
+    # https://pytorch.org/docs/stable/generated/torch.nn.functional.upsample_bilinear.html
     if "size" in kwargs:
         args.append(np.array(kwargs["size"], dtype=np.int64))
         del kwargs["size"]  # promote tensor type kwargs to args
+    else:
+        args.append(None)
+    if "align_corners" in kwargs:
+        args.append(kwargs["align_corners"])
+        del kwargs["align_corners"]
+    else:
+        args.append(True)  # Fill in the default value
     if "scale_factor" in kwargs:
         kwargs["scales_h"] = kwargs["scale_factor"]
         kwargs["scales_w"] = kwargs["scale_factor"]
@@ -431,12 +443,26 @@
 def _upsample_bilinear2d_vec_input_wrangler(
     args: list[Any], kwargs: dict[str, Any]
 ) -> tuple[list[Any], dict[str, Any]]:
+    # Wrangler for the signature difference between
+    #   'nn.functional.upsample_bilinear'
+    # and
+    #   'aten::upsample_bilinear2d.vec'
+    # https://pytorch.org/docs/stable/generated/torch.nn.functional.upsample_bilinear.html
     if "size" in kwargs:
         args.append(np.array(kwargs["size"], dtype=np.int64))
         del kwargs["size"]  # promote tensor type kwargs to args
+    else:
+        args.append(None)
+    if "align_corners" in kwargs:
+        args.append(kwargs["align_corners"])
+        del kwargs["align_corners"]
+    else:
+        args.append(True)  # Fill in the default value
     if "scale_factor" in kwargs:
-        kwargs["scale_factors"] = [kwargs["scale_factor"]] * 2
-        del kwargs["scale_factor"]  # adapt the function signature
+        args.append([kwargs["scale_factor"]] * 2)
+        del kwargs["scale_factor"]  # promote tensor type kwargs to args
+    else:
+        args.append(None)
     return args, kwargs