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#ifndef _CODEGEN_H_
#define _CODEGEN_H_
#include <llvm/Support/TargetSelect.h>
#include <llvm/IR/Value.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Function.h>
#include <llvm/ExecutionEngine/GenericValue.h>
#include <map>
#include <stack>
#include <string>
class Node;
class NBlock;
class NIdentifier;
// this is one generated block of LLVM code, containing also
// all local variables known in this scope
class CodeGenBlock
{
public:
llvm::BasicBlock *m_block;
std::map<std::string, llvm::Value *> m_locals;
};
// this class we pass along our ADT structure
class CodeGenContext
{
public:
typedef std::map<std::string, llvm::Value *> Locals;
private:
std::stack<CodeGenBlock *> m_blocks;
llvm::Module *m_module;
llvm::Function *m_mainFunction;
Locals m_locals;
public:
CodeGenContext( );
void printGeneratedCode( );
std::string getGeneratedCode( );
void generateCode( NBlock& _root );
llvm::GenericValue runCode( );
static llvm::Type *variableType( const NIdentifier& _type );
void pushBlock( llvm::BasicBlock *_block );
void popBlock( );
llvm::BasicBlock *currentBlock( );
Locals& locals( ) { return m_blocks.top( )->m_locals; }
llvm::Module *module( ) { return m_module; }
};
#endif // _CODEGEN_H_
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