add GateDecompositionPass to compiler pipeline

Author: taminob

mlir/include/mlir/Compiler/CompilerPipeline.h

@@ -119,6 +119,11 @@ class QuantumCompilerPipeline {
    */
   static void addCleanupPasses(PassManager& pm);
 
+  /**
+   * @brief Add all available optimization passes
+   */
+  static void addOptimizationPasses(PassManager& pm);
+
   /**
    * @brief Configure PassManager with diagnostic options
    *

mlir/lib/Compiler/CMakeLists.txt

@@ -21,7 +21,8 @@ add_mlir_library(
   QCOToQC
   QCToQIR
   MQT::MLIRSupport
-  MQT::ProjectOptions)
+  MQT::ProjectOptions
+  QcoPasses)
 
 # collect header files
 file(GLOB_RECURSE COMPILER_HEADERS_SOURCE "${MQT_MLIR_SOURCE_INCLUDE_DIR}/mlir/Compiler/*.h")

mlir/lib/Compiler/CompilerPipeline.cpp

@@ -13,6 +13,7 @@
 #include "mlir/Conversion/QCOToQC/QCOToQC.h"
 #include "mlir/Conversion/QCToQCO/QCToQCO.h"
 #include "mlir/Conversion/QCToQIR/QCToQIR.h"
+#include "mlir/Passes/Passes.h"
 #include "mlir/Support/PrettyPrinting.h"
 
 #include <llvm/ADT/StringRef.h>
@@ -64,6 +65,11 @@ void QuantumCompilerPipeline::addCleanupPasses(PassManager& pm) {
   pm.addPass(createRemoveDeadValuesPass());
 }
 
+void QuantumCompilerPipeline::addOptimizationPasses(PassManager& pm) {
+  // Always run all optimization passes for now
+  pm.addPass(qco::createGateDecompositionPass());
+}
+
 void QuantumCompilerPipeline::configurePassManager(PassManager& pm) const {
   // Enable timing statistics if requested
   if (config_.enableTiming) {