[MIN] make FuseMulAdd more resilient to edge cases

src/recipies/FuseMulAdd.cpp

@@ -20,6 +20,8 @@
 #include "aidge/graph/Node.hpp"
 #include "aidge/operator/Producer.hpp"
 #include "aidge/operator/GenericOperator.hpp"
+#include "aidge/utils/ErrorHandling.hpp"
+
 // Graph Regex
 #include "aidge/graphmatching/GRegex.hpp"
 #include "aidge/graphmatching/NodeRegex.hpp"
@@ -49,19 +51,19 @@ void Aidge::fuseMulAdd(std::set<std::shared_ptr<Node>> nodes){
     // Fetch the output dimension throught the bias size
     std::shared_ptr<Node> bias = (add->getParent(1)) ? add->getParent(1)->cloneSharedOperators() : nullptr;
 
-    Tensor& bias_tensor = bias->getOperator()->output(0);
-
-    std::shared_ptr<Node> weight = (matmul->getParent(1)) ? matmul->getParent(1)->cloneSharedOperators() : nullptr;
+    if (!(matmul->getParent(1))) {
+        AIDGE_INTERNAL_ASSERT("No weight detected to produce the fuseMulAdd recipe.");
+    }
+    std::shared_ptr<Node> weight = matmul->getParent(1)->cloneSharedOperators();
+    DimSize_t outSize = weight->getOperator()->output(0).dims<2>()[1];
 
     // Instanciate FC
     //std::shared_ptr<Node> fc = FC(dim[0], false, "Fc");
-    std::shared_ptr<Node> fc = std::make_shared<Node>(std::make_shared<FC_Op>(bias_tensor.dims()[0], false));
+    std::shared_ptr<Node> fc = std::make_shared<Node>(std::make_shared<FC_Op>(outSize, bias ? false : true));
 
     // Step 2 : Branch existing producers & create the others
     // link weights & bias
-    if (weight) {
-        weight->addChild(fc, 0, 1);
-    }
+    weight->addChild(fc, 0, 1);
     if (bias) {
         bias->addChild(fc, 0, 2);
     }
@@ -74,7 +76,8 @@ void Aidge::fuseMulAdd(std::set<std::shared_ptr<Node>> nodes){
     // auto nodeToReplace = std::make_shared<GraphView>();
     // nodeToReplace->add(nodes, false);
     // nodeToReplace->replaceWith({fc});
-    GraphView::replace({matmul, add, add->getParent(1), matmul->getParent(1)}, {fc, weight, bias});
+    auto newNodes = std::set<std::shared_ptr<Node>>({fc, weight, fc->getParent(2)});
+    GraphView::replace({matmul, add, add->getParent(1), matmul->getParent(1)}, newNodes);
 
 }