Define constants and return codes

evmcc/Type.cpp

@@ -12,6 +12,7 @@ llvm::IntegerType* Type::lowPrecision;
 llvm::IntegerType* Type::Byte;
 llvm::PointerType* Type::BytePtr;
 llvm::Type* Type::Void;
+llvm::Type* Type::MainReturn;
 
 void Type::init(llvm::LLVMContext& _context)
 {
@@ -21,6 +22,12 @@ void Type::init(llvm::LLVMContext& _context)
 	Byte = llvm::Type::getInt8Ty(_context);
 	BytePtr = Byte->getPointerTo();
 	Void = llvm::Type::getVoidTy(_context);
+	MainReturn = llvm::Type::getInt32Ty(_context);
+}
+
+llvm::Constant* Constant::get(ReturnCode _returnCode)
+{
+	return llvm::ConstantInt::get(Type::MainReturn, static_cast<uint64_t>(_returnCode));
 }
 
 }

evmcc/Type.h

@@ -2,6 +2,7 @@
 #pragma once
 
 #include <llvm/IR/Type.h>
+#include <llvm/IR/Constants.h>
 
 namespace evmcc
 {
@@ -20,7 +21,24 @@ struct Type
 
 	static llvm::Type* Void;
 
+	/// Main function return type
+	static llvm::Type* MainReturn;
+
 	static void init(llvm::LLVMContext& _context);
 };
 
+enum class ReturnCode
+{
+	Stop = 0,
+	Return = 1,
+	Suicide = 2,
+
+	BadJumpDestination = 101,
+};
+
+struct Constant
+{
+	static llvm::Constant* get(ReturnCode _returnCode);
+};
+
 }