fix(gopt): fix convbias replace of cd4 pass

GitOrigin-RevId: b0715e2b77026aaec4b7348fda0ae6fa282778b9

src/gopt/impl/framework.cpp

@@ -716,8 +716,8 @@ const GraphOptimizer& GraphOptimizer::apply_optimize_options(
         need_param_fuse = true;
     }
     if (options.transform_nhwcd4()) {
-        add_pass(ConvertFormatPass::make_nhwcd4_converter());
         add_pass<FuseConvBiasNonlinPass>();
+        add_pass(ConvertFormatPass::make_nhwcd4_converter());
         need_param_fuse = true;
     }
     if (options.transform_nchw88()) {

src/gopt/impl/inference.cpp

@@ -1169,18 +1169,33 @@ std::unique_ptr<ConvertFormatPass> ConvertFormatPass::make_nhwcd4_converter() {
         auto relayout_weight = opr::RelayoutFormat::make(new_inp[1], param);
         conv_bias_weights = relayout_weight.node();
 
-        param.mode = megdnn::param::RelayoutFormat::Mode::NCHW_NHWCD4I;
-        auto relayout_bias = opr::RelayoutFormat::make(new_inp[2], param);
-        conv_bias_bias = relayout_bias.node();
+        mgb_assert(new_inp.size() < 4,
+                   "ConvertFormat pass does not support fuse Z");
+        bool has_bias = new_inp.size() > 2;
+        if (has_bias &&
+            new_inp[2]->format().type() == TensorFormat::Type::DEFAULT) {
+            param.mode = megdnn::param::RelayoutFormat::Mode::NCHW_NHWCD4I;
+            auto relayout_bias = opr::RelayoutFormat::make(new_inp[2], param);
+            conv_bias_bias = relayout_bias.node();
+        } else if (has_bias) {
+            conv_bias_bias = new_inp[2];
+        }
 
         auto new_param = conv_bias_opr.param();
         new_param.format = megdnn::param::ConvBias::Format::NHWCD4;
         mgb_assert(conv_bias_src->shape().ndim == 5 &&
                    conv_bias_src->format().type() ==
                            TensorFormat::Type::IMAGE2D_PACK4);
-        auto new_conv_bias_opr = opr::ConvBias::make(
-                conv_bias_src, conv_bias_weights, conv_bias_bias, new_param,
-                conv_bias_opr.execution_policy(), conv_bias_opr.config());
+        SymbolVar new_conv_bias_opr;
+        if (has_bias) {
+            new_conv_bias_opr = opr::ConvBias::make(
+                    conv_bias_src, conv_bias_weights, conv_bias_bias, new_param,
+                    conv_bias_opr.execution_policy(), conv_bias_opr.config());
+        } else {
+            new_conv_bias_opr = opr::ConvBias::make(
+                    conv_bias_src, conv_bias_weights, new_param,
+                    conv_bias_opr.execution_policy(), conv_bias_opr.config());
+        }
         OperatorNodeBase* ret = new_conv_bias_opr.node()->owner_opr();
         mgb_assert(new_conv_bias_opr.shape().ndim == 5 &&
                    new_conv_bias_opr.format().type() ==