[WIP] Lowering Ion dialect to llvm dialect

mlir/include/Ion/Transforms/Passes.h

@@ -21,5 +21,6 @@
 namespace catalyst {
 
 std::unique_ptr<mlir::Pass> createQuantumToIonPass();
+std::unique_ptr<mlir::Pass> createIonConversionPass();
 
 } // namespace catalyst

mlir/include/Ion/Transforms/Passes.td

@@ -43,4 +43,16 @@ def QuantumToIonPass : Pass<"quantum-to-ion"> {
     let constructor = "catalyst::createQuantumToIonPass()";
 }
 
+def IonConversionPass : Pass<"convert-ion-to-llvm"> {
+    let summary = "Perform a dialect conversion from ion to LLVM";
+
+    let dependentDialects = [
+       "mlir::func::FuncDialect",
+       "mlir::LLVM::LLVMDialect",
+       "catalyst::quantum::QuantumDialect"
+    ];
+
+    let constructor = "catalyst::createIonConversionPass()";
+}
+
 #endif // ION_PASSES

mlir/include/Ion/Transforms/Patterns.h

@@ -24,6 +24,8 @@ namespace catalyst {
 namespace ion {
 
 void populateQuantumToIonPatterns(mlir::RewritePatternSet &, const OQDDatabaseManager &);
+void populateConversionPatterns(mlir::LLVMTypeConverter &typeConverter,
+                                mlir::RewritePatternSet &patterns);
 
 } // namespace ion
 } // namespace catalyst

mlir/lib/Catalyst/Transforms/RegisterAllPasses.cpp

@@ -42,6 +42,7 @@ void catalyst::registerAllCatalystPasses()
     mlir::registerPass(catalyst::createGradientLoweringPass);
     mlir::registerPass(catalyst::createHloCustomCallLoweringPass);
     mlir::registerPass(catalyst::createInlineNestedModulePass);
+    mlir::registerPass(catalyst::createIonConversionPass);
     mlir::registerPass(catalyst::createMemrefCopyToLinalgCopyPass);
     mlir::registerPass(catalyst::createMemrefToLLVMWithTBAAPass);
     mlir::registerPass(catalyst::createMitigationLoweringPass);

mlir/lib/Driver/CompilerDriver.cpp

@@ -64,6 +64,7 @@
 #include "Gradient/IR/GradientDialect.h"
 #include "Gradient/IR/GradientInterfaces.h"
 #include "Gradient/Transforms/Passes.h"
+#include "Ion/IR/IonDialect.h"
 #include "Mitigation/IR/MitigationDialect.h"
 #include "Mitigation/Transforms/Passes.h"
 #include "Quantum/IR/QuantumDialect.h"
@@ -294,6 +295,7 @@ void registerAllCatalystDialects(DialectRegistry &registry)
     // Catalyst
     registry.insert<CatalystDialect>();
     registry.insert<quantum::QuantumDialect>();
+    registry.insert<ion::IonDialect>();
     registry.insert<gradient::GradientDialect>();
     registry.insert<mitigation::MitigationDialect>();
 }

mlir/lib/Ion/Transforms/CMakeLists.txt

@@ -1,6 +1,8 @@
 set(LIBRARY_NAME ion-transforms)
 
 file(GLOB SRC
+    ion-to-llvm.cpp
+    ConversionPatterns.cpp
     quantum_to_ion.cpp
     QuantumToIonPatterns.cpp
 )
@@ -37,6 +39,8 @@ target_link_libraries(${LIBRARY_NAME} PRIVATE tomlplusplus::tomlplusplus)
 # tmol++ source has a warning which we want to ignore
 # This is because toml++ ships source-only, not an executable, so we have to compile it
 set_source_files_properties(
+  ion-to-llvm.cpp
+  ConversionPatterns.cpp
   quantum_to_ion.cpp
   QuantumToIonPatterns.cpp
   PROPERTIES