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#pragma once
#include "Common.h"
#include "BasicBlock.h"
namespace dev
{
namespace eth
{
namespace jit
{
class Compiler
{
public:
struct Options
{
/// Optimize stack operations between basic blocks
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bool optimizeStack = true;
/// Rewrite switch instructions to sequences of branches
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bool rewriteSwitchToBranches = true;
/// Dump CFG as a .dot file for graphviz
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bool dumpCFG = false;
};
using ProgramCounter = uint64_t;
Compiler(Options const& _options);
std::unique_ptr<llvm::Module> compile(code_iterator _begin, code_iterator _end, std::string const& _id);
private:
void createBasicBlocks(code_iterator _begin, code_iterator _end);
void compileBasicBlock(BasicBlock& _basicBlock, class RuntimeManager& _runtimeManager, class Arith256& _arith, class Memory& _memory, class Ext& _ext, class GasMeter& _gasMeter, llvm::BasicBlock* _nextBasicBlock);
llvm::BasicBlock* getJumpTableBlock(RuntimeManager& _runtimeManager);
llvm::BasicBlock* getBadJumpBlock(RuntimeManager& _runtimeManager);
void removeDeadBlocks();
/// Dumps basic block graph in graphviz format to a file, if option dumpCFG is enabled.
void dumpCFGifRequired(std::string const& _dotfilePath);
/// Dumps basic block graph in graphviz format to a stream.
void dumpCFGtoStream(std::ostream& _out);
/// Dumps all basic blocks to stderr. Useful in a debugging session.
void dump();
/// Compiler options
Options const& m_options;
/// Helper class for generating IR
llvm::IRBuilder<> m_builder;
/// Maps a program counter pc to a basic block that starts at pc (if any).
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std::map<ProgramCounter, BasicBlock> m_basicBlocks;
/// Stop basic block - terminates execution with STOP code (0)
llvm::BasicBlock* m_stopBB = nullptr;
/// Block with a jump table.
std::unique_ptr<BasicBlock> m_jumpTableBlock;
/// Destination for invalid jumps
std::unique_ptr<BasicBlock> m_badJumpBlock;
/// Main program function
llvm::Function* m_mainFunc = nullptr;
};
}
}
}