fix FuseMulAdd recipe and its tests

src/recipies/FuseMulAdd.cpp

@@ -41,7 +41,19 @@ void Aidge::fuseMulAdd(std::shared_ptr<Aidge::Node> matmulNode, std::shared_ptr<
     AIDGE_ASSERT(matmulNode->getParent(1), "No weight detected to produce the fuseMulAdd recipe.");
 
     std::shared_ptr<Node> weight = matmulNode->getParent(1)->cloneSharedOperators();
-    const DimSize_t outSize = std::dynamic_pointer_cast<MatMul_Op>(matmulNode->getOperator()) -> getAttr<DimSize_t>("OutChannels");
+    // TODO: find another way to get OutChannels for FC operator.
+    // This poor fix supposes that one of Add inputs is a const and has the same outChannels as the output
+    DimSize_t outSize = 0;
+    const auto& op = std::dynamic_pointer_cast<OperatorTensor>(addNode->getOperator());
+    for (size_t i = 0; i < op->nbInputs(); i++)
+    {
+        const auto& inTensor = op->getInput(i);
+        if(inTensor->nbDims() > 0) {
+            outSize = inTensor->dims()[inTensor->nbDims()-1];
+            break;
+        }
+    }
+    AIDGE_ASSERT(outSize, "Couldnt get output number of channels for FC operator.");
 
     // Instanciate FC
     //std::shared_ptr<Node> fc = FC(dim[0], false, "Fc");

unit_tests/graphRegex/Test_GraphRegex.cpp

@@ -126,9 +126,9 @@ TEST_CASE("GraphRegexUser") {
     SECTION("Applied Recipes"){
 
       // generate the original GraphView
-        auto matmul0 = MatMul(5, 5, "matmul0");
+        auto matmul0 = MatMul("matmul0");
         auto add0 = Add(2, "add0");
-        auto matmul1 = MatMul(5, 5, "matmul1");
+        auto matmul1 = MatMul("matmul1");
         auto add1 = Add(2, "add1");
 
         auto b0 = Producer({5}, "B0");
@@ -154,7 +154,7 @@ TEST_CASE("GraphRegexUser") {
 
 
         auto g = std::make_shared<GraphView>();
-        g->add({matmul0, add0, matmul1, add1, b0, b1,fl,fc});
+        g->add({w0, matmul0, b0, add0, w1, matmul1, b1, add1,fl,fc});
 
         std::shared_ptr<GraphRegex> kitchenBook = std::make_shared<GraphRegex>();
 

unit_tests/recipies/Test_FuseMulAdd.cpp

@@ -25,9 +25,9 @@ namespace Aidge {
 
 TEST_CASE("[cpu/recipies] FuseMulAdd", "[FuseMulAdd][recipies]") {
     // generate the original GraphView
-    auto matmul0 = MatMul(5, 5, "matmul0");
+    auto matmul0 = MatMul("matmul0");
     auto add0 = Add(2, "add0");
-    auto matmul1 = MatMul(5, 5, "matmul1");
+    auto matmul1 = MatMul("matmul1");
     auto add1 = Add(2, "add1");
 
     auto b0 = Producer({5}, "B0");
@@ -49,7 +49,7 @@ TEST_CASE("[cpu/recipies] FuseMulAdd", "[FuseMulAdd][recipies]") {
     b1->addChild(add1, 0, 1);
 
     auto g = std::make_shared<GraphView>();
-    g->add({matmul0, add0, matmul1, add1, b0, b1});
+    g->add({w0, matmul0, b0, add0, w1, matmul1, b1, add1});
 
     // Check original graph
     REQUIRE(g->getNodes() ==