support fusing non constant bias into conv

Signed-off-by: daquexian <[email protected]>

Author: daquexian

onnxoptimizer/passes/fuse_add_bias_into_conv.h

@@ -64,16 +64,15 @@ struct FuseAddBiasIntoConv final : public PredicateBasedPass {
     destroy_current = NodeDestroyType::DestroyZero;
     auto orig_conv = n->inputs()[0];
     auto orig_bias = n->inputs()[1];
-    // check if bias is Const or in graph's initializers
-    if (orig_bias->node()->kind() != kConstant &&
-        orig_bias->node()->kind() != kParam) {
-      return false;
-    }
     // check if conv is only used by Add
     if (orig_conv->uses().size() > 1) {
       return false;
     }
     auto conv_shape = orig_conv->sizes();
+    // We need the size of bias
+    if (!orig_bias->has_sizes()) {
+      return false;
+    }
     auto bias_shape = orig_bias->sizes();
     auto weight_shape = orig_conv->node()->inputs()[1]->sizes();
     int64_t M = -1;

onnxoptimizer/test/optimizer_test.py

@@ -1125,6 +1125,31 @@ def test_fuse_add_bias_into_conv_squeeze_4d_bias_no_fuse(self):
         assert optimized_model.graph.node[0].op_type == 'Conv'
         assert optimized_model.graph.node[1].op_type == 'Add'
 
+    # type: () -> None
+    def test_fuse_add_bias_into_conv_with_non_constant_bias(self):
+        nodes = [helper.make_node("Conv", ["X", "Y"], ["Z"]),
+                 helper.make_node("Sin", ["A"], ["B"]),
+                 helper.make_node("Add", ["Z", "B"], ["C"])]
+        graph = helper.make_graph(
+            nodes,
+            "test",
+            [helper.make_tensor_value_info("X", TensorProto.FLOAT, (1, 5, 3, 3)),
+             helper.make_tensor_value_info(
+                 "Y", TensorProto.FLOAT, (16, 5, 3, 3)),
+             helper.make_tensor_value_info("A", TensorProto.FLOAT, (16, 1, 1))],
+            [helper.make_tensor_value_info(
+                "C", TensorProto.FLOAT, (1, 16, 1, 1))],
+            value_info=[helper.make_tensor_value_info(
+                "B", TensorProto.FLOAT, (16, 1, 1))]
+        )
+        optimized_model = self._optimized(graph, ["fuse_add_bias_into_conv"])
+
+        assert len(list(optimized_model.graph.node)) == 3
+        assert optimized_model.graph.node[0].op_type == 'Sin'
+        assert optimized_model.graph.node[1].op_type == 'Squeeze'
+        assert optimized_model.graph.node[2].op_type == 'Conv'
+        assert optimized_model.graph.output[0].name == 'C'
+
     def test_fuse_matmul_add_bias_into_gemm(self):  # type: () -> None
         matmul = helper.make_node("MatMul", ["X", "Y"], ["Z"])
         add = helper.make_node("Add", ["Z", "B"], ["A"])