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#pragma once
#include <llvm/IR/IRBuilder.h>
namespace dev
{
namespace eth
{
namespace jit
{
class RuntimeManager;
/// Base class for compiler helpers like Memory, GasMeter, etc.
class CompilerHelper
{
protected:
CompilerHelper(llvm::IRBuilder<>& _builder);
CompilerHelper(const CompilerHelper&) = delete;
void operator=(CompilerHelper) = delete;
/// Reference to the IR module being compiled
llvm::Module* getModule();
/// Reference to the main module function
llvm::Function* getMainFunction();
/// Reference to parent compiler IR builder
llvm::IRBuilder<>& m_builder;
llvm::IRBuilder<>& getBuilder() { return m_builder; }
template<typename ..._Args>
llvm::CallInst* createCall(llvm::Function* _func, _Args*... _args)
{
llvm::Value* args[] = {_args...};
return getBuilder().CreateCall(_func, args);
}
friend class RuntimeHelper;
};
/// Compiler helper that depends on runtime data
class RuntimeHelper : public CompilerHelper
{
protected:
RuntimeHelper(RuntimeManager& _runtimeManager);
RuntimeManager& getRuntimeManager() { return m_runtimeManager; }
private:
RuntimeManager& m_runtimeManager;
};
/// Saves the insert point of the IR builder and restores it when destructed
struct InsertPointGuard
{
InsertPointGuard(llvm::IRBuilder<>& _builder) :
m_builder(_builder),
m_insertBB(m_builder.GetInsertBlock()),
m_insertPt(m_builder.GetInsertPoint())
{}
InsertPointGuard(const InsertPointGuard&) = delete;
void operator=(InsertPointGuard) = delete;
~InsertPointGuard()
{
m_builder.SetInsertPoint(m_insertBB, m_insertPt);
}
private:
llvm::IRBuilder<>& m_builder;
llvm::BasicBlock* m_insertBB;
llvm::BasicBlock::iterator m_insertPt;
};
}
}
}