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code cleanup & coding-standardization

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artur-zawlocki 2014-10-31 14:46:32 +00:00
parent 439561a5fa
commit 40561b1270
1 changed files with 113 additions and 132 deletions
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245
libevmjit/Compiler.cpp
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@ -32,28 +32,27 @@ namespace eth
namespace jit
{
Compiler::Compiler():
m_builder(llvm::getGlobalContext()),
m_jumpTableBlock(),
m_badJumpBlock()
Compiler::Compiler(Options const& _options):
m_options(_options),
m_builder(llvm::getGlobalContext())
{
Type::init(m_builder.getContext());
}
void Compiler::createBasicBlocks(bytesConstRef bytecode)
void Compiler::createBasicBlocks(bytesConstRef _bytecode)
{
std::set<ProgramCounter> splitPoints; // Sorted collections of instruction indices where basic blocks start/end
std::map<ProgramCounter, ProgramCounter> directJumpTargets;
std::vector<ProgramCounter> indirectJumpTargets;
boost::dynamic_bitset<> validJumpTargets(std::max(bytecode.size(), size_t(1)));
boost::dynamic_bitset<> validJumpTargets(std::max(_bytecode.size(), size_t(1)));
splitPoints.insert(0); // First basic block
validJumpTargets[0] = true;
for (auto curr = bytecode.begin(); curr != bytecode.end(); ++curr)
for (auto curr = _bytecode.begin(); curr != _bytecode.end(); ++curr)
{
ProgramCounter currentPC = curr - bytecode.begin();
ProgramCounter currentPC = curr - _bytecode.begin();
validJumpTargets[currentPC] = true;
auto inst = Instruction(*curr);
@ -62,19 +61,19 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
case Instruction::ANY_PUSH:
{
auto val = readPushData(curr, bytecode.end());
auto val = readPushData(curr, _bytecode.end());
auto next = curr + 1;
if (next == bytecode.end())
if (next == _bytecode.end())
break;
auto nextInst = Instruction(*next);
if (nextInst == Instruction::JUMP || nextInst == Instruction::JUMPI)
{
// Create a block for the JUMP target.
ProgramCounter targetPC = val < bytecode.size() ? val.convert_to<ProgramCounter>() : bytecode.size();
ProgramCounter targetPC = val < _bytecode.size() ? val.convert_to<ProgramCounter>() : _bytecode.size();
splitPoints.insert(targetPC);
ProgramCounter jumpPC = (next - bytecode.begin());
ProgramCounter jumpPC = (next - _bytecode.begin());
directJumpTargets[jumpPC] = targetPC;
}
break;
@ -83,7 +82,7 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
case Instruction::JUMPDEST:
{
// A basic block starts at the next instruction.
if (currentPC + 1 < bytecode.size())
if (currentPC + 1 < _bytecode.size())
{
splitPoints.insert(currentPC + 1);
indirectJumpTargets.push_back(currentPC + 1);
@ -98,7 +97,7 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
case Instruction::SUICIDE:
{
// Create a basic block starting at the following instruction.
if (curr + 1 < bytecode.end())
if (curr + 1 < _bytecode.end())
{
splitPoints.insert(currentPC + 1);
}
@ -113,7 +112,7 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
// Remove split points generated from jumps out of code or into data.
for (auto it = splitPoints.cbegin(); it != splitPoints.cend();)
{
if (*it > bytecode.size() || !validJumpTargets[*it])
if (*it > _bytecode.size() || !validJumpTargets[*it])
it = splitPoints.erase(it);
else
++it;
@ -123,7 +122,7 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
{
auto beginInstIdx = *it;
++it;
auto endInstIdx = it != splitPoints.cend() ? *it : bytecode.size();
auto endInstIdx = it != splitPoints.cend() ? *it : _bytecode.size();
basicBlocks.emplace(std::piecewise_construct, std::forward_as_tuple(beginInstIdx), std::forward_as_tuple(beginInstIdx, endInstIdx, m_mainFunc, m_builder));
}
@ -133,7 +132,7 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
for (auto it = directJumpTargets.cbegin(); it != directJumpTargets.cend(); ++it)
{
if (it->second >= bytecode.size())
if (it->second >= _bytecode.size())
{
// Jumping out of code means STOP
m_directJumpTargets[it->first] = m_stopBB;
@ -154,12 +153,10 @@ void Compiler::createBasicBlocks(bytesConstRef bytecode)
}
for (auto it = indirectJumpTargets.cbegin(); it != indirectJumpTargets.cend(); ++it)
{
m_indirectJumpTargets.push_back(&basicBlocks.find(*it)->second);
}
}
std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef bytecode)
std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef _bytecode)
{
auto module = std::unique_ptr<llvm::Module>(new llvm::Module("main", m_builder.getContext()));
@ -173,7 +170,7 @@ std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef bytecode)
auto entryBlock = llvm::BasicBlock::Create(m_builder.getContext(), "entry", m_mainFunc);
m_builder.SetInsertPoint(entryBlock);
createBasicBlocks(bytecode);
createBasicBlocks(_bytecode);
// Init runtime structures.
RuntimeManager runtimeManager(m_builder);
@ -191,13 +188,11 @@ std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef bytecode)
auto iterCopy = basicBlockPairIt;
++iterCopy;
auto nextBasicBlock = (iterCopy != basicBlocks.end()) ? iterCopy->second.llvm() : nullptr;
compileBasicBlock(basicBlock, bytecode, runtimeManager, arith, memory, ext, gasMeter, nextBasicBlock);
compileBasicBlock(basicBlock, _bytecode, runtimeManager, arith, memory, ext, gasMeter, nextBasicBlock);
}
// Code for special blocks:
// TODO: move to separate function.
// Note: Right now the codegen for special blocks depends only on createBasicBlock(),
// not on the codegen for 'regular' blocks. But it has to be done before linkBasicBlocks().
m_builder.SetInsertPoint(m_stopBB);
m_builder.CreateRet(Constant::get(ReturnCode::Stop));
@ -218,75 +213,59 @@ std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef bytecode)
}
}
else
{
m_builder.CreateBr(m_badJumpBlock->llvm());
}
removeDeadBlocks();
if (getenv("EVMCC_DEBUG_BLOCKS"))
{
std::ofstream ofs("blocks-init.dot");
dumpBasicBlockGraph(ofs);
ofs.close();
std::cerr << "\n\nAfter dead block elimination \n\n";
dump();
}
dumpCFGifRequired("blocks-init.dot");
//if (getenv("EVMCC_OPTIMIZE_STACK"))
//{
if (m_options.optimizeStack)
{
std::vector<BasicBlock*> blockList;
for (auto& entry : basicBlocks)
blockList.push_back(&entry.second);
if (m_jumpTableBlock != nullptr)
if (m_jumpTableBlock)
blockList.push_back(m_jumpTableBlock.get());
BasicBlock::linkLocalStacks(blockList, m_builder);
if (getenv("EVMCC_DEBUG_BLOCKS"))
{
std::ofstream ofs("blocks-opt.dot");
dumpBasicBlockGraph(ofs);
ofs.close();
std::cerr << "\n\nAfter stack optimization \n\n";
dump();
}
//}
dumpCFGifRequired("blocks-opt.dot");
}
for (auto& entry : basicBlocks)
entry.second.localStack().synchronize(stack);
if (m_jumpTableBlock != nullptr)
if (m_jumpTableBlock)
m_jumpTableBlock->localStack().synchronize(stack);
if (getenv("EVMCC_DEBUG_BLOCKS"))
{
std::ofstream ofs("blocks-sync.dot");
dumpBasicBlockGraph(ofs);
ofs.close();
std::cerr << "\n\nAfter stack synchronization \n\n";
dump();
}
dumpCFGifRequired("blocks-sync.dot");
llvm::FunctionPassManager fpManager(module.get());
fpManager.add(llvm::createLowerSwitchPass());
fpManager.doInitialization();
fpManager.run(*m_mainFunc);
if (m_jumpTableBlock && m_options.rewriteSwitchToBranches)
{
llvm::FunctionPassManager fpManager(module.get());
fpManager.add(llvm::createLowerSwitchPass());
fpManager.doInitialization();
fpManager.run(*m_mainFunc);
}
return module;
}
void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode, RuntimeManager& _runtimeManager, Arith256& arith, Memory& memory, Ext& ext, GasMeter& gasMeter, llvm::BasicBlock* nextBasicBlock)
void Compiler::compileBasicBlock(BasicBlock& _basicBlock, bytesConstRef _bytecode, RuntimeManager& _runtimeManager,
Arith256& _arith, Memory& _memory, Ext& _ext, GasMeter& _gasMeter, llvm::BasicBlock* _nextBasicBlock)
{
m_builder.SetInsertPoint(basicBlock.llvm());
auto& stack = basicBlock.localStack();
if (!_nextBasicBlock) // this is the last block in the code
_nextBasicBlock = m_stopBB;
for (auto currentPC = basicBlock.begin(); currentPC != basicBlock.end(); ++currentPC)
m_builder.SetInsertPoint(_basicBlock.llvm());
auto& stack = _basicBlock.localStack();
for (auto currentPC = _basicBlock.begin(); currentPC != _basicBlock.end(); ++currentPC)
{
auto inst = static_cast<Instruction>(bytecode[currentPC]);
auto inst = static_cast<Instruction>(_bytecode[currentPC]);
gasMeter.count(inst);
_gasMeter.count(inst);
switch (inst)
{
@ -313,7 +292,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto lhs = stack.pop();
auto rhs = stack.pop();
auto res = arith.mul(lhs, rhs);
auto res = _arith.mul(lhs, rhs);
stack.push(res);
break;
}
@ -322,7 +301,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto lhs = stack.pop();
auto rhs = stack.pop();
auto res = arith.div(lhs, rhs);
auto res = _arith.div(lhs, rhs);
stack.push(res);
break;
}
@ -331,7 +310,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto lhs = stack.pop();
auto rhs = stack.pop();
auto res = arith.sdiv(lhs, rhs);
auto res = _arith.sdiv(lhs, rhs);
stack.push(res);
break;
}
@ -340,7 +319,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto lhs = stack.pop();
auto rhs = stack.pop();
auto res = arith.mod(lhs, rhs);
auto res = _arith.mod(lhs, rhs);
stack.push(res);
break;
}
@ -349,7 +328,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto lhs = stack.pop();
auto rhs = stack.pop();
auto res = arith.smod(lhs, rhs);
auto res = _arith.smod(lhs, rhs);
stack.push(res);
break;
}
@ -358,7 +337,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto left = stack.pop();
auto right = stack.pop();
auto ret = ext.exp(left, right);
auto ret = _ext.exp(left, right);
stack.push(ret);
break;
}
@ -480,7 +459,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto lhs = stack.pop();
auto rhs = stack.pop();
auto mod = stack.pop();
auto res = arith.addmod(lhs, rhs, mod);
auto res = _arith.addmod(lhs, rhs, mod);
stack.push(res);
break;
}
@ -490,7 +469,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto lhs = stack.pop();
auto rhs = stack.pop();
auto mod = stack.pop();
auto res = arith.mulmod(lhs, rhs, mod);
auto res = _arith.mulmod(lhs, rhs, mod);
stack.push(res);
break;
}
@ -529,8 +508,8 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto inOff = stack.pop();
auto inSize = stack.pop();
memory.require(inOff, inSize);
auto hash = ext.sha3(inOff, inSize);
_memory.require(inOff, inSize);
auto hash = _ext.sha3(inOff, inSize);
stack.push(hash);
break;
}
@ -543,9 +522,9 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
case Instruction::ANY_PUSH:
{
auto curr = bytecode.begin() + currentPC; // TODO: replace currentPC with iterator
auto value = readPushData(curr, bytecode.end());
currentPC = curr - bytecode.begin();
auto curr = _bytecode.begin() + currentPC; // TODO: replace currentPC with iterator
auto value = readPushData(curr, _bytecode.end());
currentPC = curr - _bytecode.begin();
stack.push(Constant::get(value));
break;
@ -568,7 +547,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
case Instruction::MLOAD:
{
auto addr = stack.pop();
auto word = memory.loadWord(addr);
auto word = _memory.loadWord(addr);
stack.push(word);
break;
}
@ -577,7 +556,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto addr = stack.pop();
auto word = stack.pop();
memory.storeWord(addr, word);
_memory.storeWord(addr, word);
break;
}
@ -585,13 +564,13 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto addr = stack.pop();
auto word = stack.pop();
memory.storeByte(addr, word);
_memory.storeByte(addr, word);
break;
}
case Instruction::MSIZE:
{
auto word = memory.getSize();
auto word = _memory.getSize();
stack.push(word);
break;
}
@ -599,7 +578,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
case Instruction::SLOAD:
{
auto index = stack.pop();
auto value = ext.store(index);
auto value = _ext.store(index);
stack.push(value);
break;
}
@ -608,8 +587,8 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
{
auto index = stack.pop();
auto value = stack.pop();
gasMeter.countSStore(ext, index, value);
ext.setStore(index, value);
_gasMeter.countSStore(_ext, index, value);
_ext.setStore(index, value);
break;
}
@ -621,7 +600,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
// 2. m_directJumpTargets[currentPC] is defined (meaning that the previous instruction is a PUSH)
// Otherwise generate a indirect jump (a switch).
llvm::BasicBlock* targetBlock = nullptr;
if (currentPC != basicBlock.begin())
if (currentPC != _basicBlock.begin())
{
auto pairIter = m_directJumpTargets.find(currentPC);
if (pairIter != m_directJumpTargets.end())
@ -647,17 +626,13 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto zero = Constant::get(0);
auto cond = m_builder.CreateICmpNE(val, zero, "nonzero");
if (!nextBasicBlock) // In case JUMPI is the last instruction
nextBasicBlock = m_stopBB;
if (targetBlock)
{
stack.pop();
m_builder.CreateCondBr(cond, targetBlock, nextBasicBlock);
m_builder.CreateCondBr(cond, targetBlock, _nextBasicBlock);
}
else
m_builder.CreateCondBr(cond, m_jumpTableBlock->llvm(), nextBasicBlock);
m_builder.CreateCondBr(cond, m_jumpTableBlock->llvm(), _nextBasicBlock);
}
break;
@ -699,7 +674,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
case Instruction::BALANCE:
{
auto address = stack.pop();
auto value = ext.balance(address);
auto value = _ext.balance(address);
stack.push(value);
break;
}
@ -707,7 +682,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
case Instruction::EXTCODESIZE:
{
auto addr = stack.pop();
auto value = ext.codesizeAt(addr);
auto value = _ext.codesizeAt(addr);
stack.push(value);
break;
}
@ -721,7 +696,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto srcPtr = _runtimeManager.getCallData();
auto srcSize = _runtimeManager.get(RuntimeData::CallDataSize);
memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
_memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
break;
}
@ -734,7 +709,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto srcPtr = _runtimeManager.getCode(); // TODO: Code & its size are constants, feature #80814234
auto srcSize = _runtimeManager.get(RuntimeData::CodeSize);
memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
_memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
break;
}
@ -745,17 +720,17 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto srcIdx = stack.pop();
auto reqBytes = stack.pop();
auto srcPtr = ext.codeAt(extAddr);
auto srcSize = ext.codesizeAt(extAddr);
auto srcPtr = _ext.codeAt(extAddr);
auto srcSize = _ext.codesizeAt(extAddr);
memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
_memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);
break;
}
case Instruction::CALLDATALOAD:
{
auto index = stack.pop();
auto value = ext.calldataload(index);
auto value = _ext.calldataload(index);
stack.push(value);
break;
}
@ -765,9 +740,9 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto endowment = stack.pop();
auto initOff = stack.pop();
auto initSize = stack.pop();
memory.require(initOff, initSize);
_memory.require(initOff, initSize);
auto address = ext.create(endowment, initOff, initSize);
auto address = _ext.create(endowment, initOff, initSize);
stack.push(address);
break;
}
@ -783,21 +758,21 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto outOff = stack.pop();
auto outSize = stack.pop();
gasMeter.commitCostBlock(gas);
_gasMeter.commitCostBlock(gas);
// Require memory for the max of in and out buffers
// Require _memory for the max of in and out buffers
auto inSizeReq = m_builder.CreateAdd(inOff, inSize, "inSizeReq");
auto outSizeReq = m_builder.CreateAdd(outOff, outSize, "outSizeReq");
auto cmp = m_builder.CreateICmpUGT(inSizeReq, outSizeReq);
auto sizeReq = m_builder.CreateSelect(cmp, inSizeReq, outSizeReq, "sizeReq");
memory.require(sizeReq);
_memory.require(sizeReq);
auto receiveAddress = codeAddress;
if (inst == Instruction::CALLCODE)
receiveAddress = _runtimeManager.get(RuntimeData::Address);
auto ret = ext.call(gas, receiveAddress, value, inOff, inSize, outOff, outSize, codeAddress);
gasMeter.giveBack(gas);
auto ret = _ext.call(gas, receiveAddress, value, inOff, inSize, outOff, outSize, codeAddress);
_gasMeter.giveBack(gas);
stack.push(ret);
break;
}
@ -807,7 +782,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
auto index = stack.pop();
auto size = stack.pop();
memory.require(index, size);
_memory.require(index, size);
_runtimeManager.registerReturnData(index, size);
m_builder.CreateRet(Constant::get(ReturnCode::Return));
@ -815,13 +790,14 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
}
case Instruction::SUICIDE:
{
auto address = stack.pop();
ext.suicide(address);
// Fall through
}
case Instruction::STOP:
{
if (inst == Instruction::SUICIDE)
{
auto address = stack.pop();
_ext.suicide(address);
}
m_builder.CreateRet(Constant::get(ReturnCode::Stop));
break;
}
@ -834,15 +810,11 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
}
}
gasMeter.commitCostBlock();
_gasMeter.commitCostBlock();
if (!basicBlock.llvm()->getTerminator()) // If block not terminated
{
if (nextBasicBlock)
m_builder.CreateBr(nextBasicBlock); // Branch to the next block
else
m_builder.CreateRet(Constant::get(ReturnCode::Stop)); // Return STOP code
}
// Block may have no terminator if the next instruction is a jump destination.
if (!_basicBlock.llvm()->getTerminator())
m_builder.CreateBr(_nextBasicBlock);
}
@ -877,11 +849,22 @@ void Compiler::removeDeadBlocks()
}
}
void Compiler::dumpBasicBlockGraph(std::ostream& out)
void Compiler::dumpCFGifRequired(std::string const& _dotfilePath)
{
out << "digraph BB {\n"
<< " node [shape=record, fontname=Courier, fontsize=10];\n"
<< " entry [share=record, label=\"entry block\"];\n";
if (! m_options.dumpCFG)
return;
// TODO: handle i/o failures
std::ofstream ofs(_dotfilePath);
dumpCFGtoStream(ofs);
ofs.close();
}
void Compiler::dumpCFGtoStream(std::ostream& _out)
{
_out << "digraph BB {\n"
<< " node [shape=record, fontname=Courier, fontsize=10];\n"
<< " entry [share=record, label=\"entry block\"];\n";
std::vector<BasicBlock*> blocks;
for (auto& pair : basicBlocks)
@ -901,7 +884,7 @@ void Compiler::dumpBasicBlockGraph(std::ostream& out)
std::ostringstream oss;
bb->dump(oss, true);
out << " \"" << blockName << "\" [shape=record, label=\" { " << blockName << "|" << oss.str() << "} \"];\n";
_out << " \"" << blockName << "\" [shape=record, label=\" { " << blockName << "|" << oss.str() << "} \"];\n";
}
// Output edges
@ -912,15 +895,13 @@ void Compiler::dumpBasicBlockGraph(std::ostream& out)
auto end = llvm::pred_end(bb->llvm());
for (llvm::pred_iterator it = llvm::pred_begin(bb->llvm()); it != end; ++it)
{
out << " \"" << (*it)->getName().str() << "\" -> \"" << blockName << "\" ["
<< ((m_jumpTableBlock.get() && *it == m_jumpTableBlock.get()->llvm()) ? "style = dashed, " : "")
//<< "label = \""
//<< phiNodesPerBlock[bb]
<< "];\n";
_out << " \"" << (*it)->getName().str() << "\" -> \"" << blockName << "\" ["
<< ((m_jumpTableBlock.get() && *it == m_jumpTableBlock.get()->llvm()) ? "style = dashed, " : "")
<< "];\n";
}
}
out << "}\n";
_out << "}\n";
}
void Compiler::dump()