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Alloc stack elemnent for external function call argument on demand

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This commit is contained in:
Paweł Bylica 2015-01-07 15:08:36 +01:00
parent b6248cc38d
commit 4f4fc6349a
2 changed files with 34 additions and 11 deletions
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41
libevmjit/Ext.cpp
View file

@ -67,27 +67,47 @@ llvm::Function* createFunc(EnvFunc _id, llvm::Module* _module)
return llvm::Function::Create(std::get<1>(desc), llvm::Function::ExternalLinkage, std::get<0>(desc), _module); return llvm::Function::Create(std::get<1>(desc), llvm::Function::ExternalLinkage, std::get<0>(desc), _module);
} }
llvm::Value* Ext::getArgAlloca()
{
auto& a = m_argAllocas[m_argCounter++];
if (!a)
{
// FIXME: Improve order and names
InsertPointGuard g{getBuilder()};
getBuilder().SetInsertPoint(getMainFunction()->front().getFirstNonPHI());
a = getBuilder().CreateAlloca(Type::Word, nullptr, "arg");
}
return a;
}
llvm::Value* Ext::byPtr(llvm::Value* _value)
{
auto a = getArgAlloca();
getBuilder().CreateStore(_value, a);
return a;
}
llvm::CallInst* Ext::createCall(EnvFunc _funcId, std::initializer_list<llvm::Value*> const& _args) llvm::CallInst* Ext::createCall(EnvFunc _funcId, std::initializer_list<llvm::Value*> const& _args)
{ {
auto& func = m_funcs[static_cast<size_t>(_funcId)]; auto& func = m_funcs[static_cast<size_t>(_funcId)];
if (!func) if (!func)
func = createFunc(_funcId, getModule()); func = createFunc(_funcId, getModule());
m_argCounter = 0;
return getBuilder().CreateCall(func, {_args.begin(), _args.size()}); return getBuilder().CreateCall(func, {_args.begin(), _args.size()});
} }
llvm::Value* Ext::sload(llvm::Value* _index) llvm::Value* Ext::sload(llvm::Value* _index)
{ {
m_builder.CreateStore(_index, m_args[0]); auto ret = getArgAlloca();
createCall(EnvFunc::sload, {getRuntimeManager().getEnvPtr(), m_args[0], m_args[1]}); // Uses native endianness createCall(EnvFunc::sload, {getRuntimeManager().getEnvPtr(), byPtr(_index), ret}); // Uses native endianness
return m_builder.CreateLoad(m_args[1]); return m_builder.CreateLoad(ret);
} }
void Ext::sstore(llvm::Value* _index, llvm::Value* _value) void Ext::sstore(llvm::Value* _index, llvm::Value* _value)
{ {
m_builder.CreateStore(_index, m_args[0]); createCall(EnvFunc::sstore, {getRuntimeManager().getEnvPtr(), byPtr(_index), byPtr(_value)}); // Uses native endianness
m_builder.CreateStore(_value, m_args[1]);
createCall(EnvFunc::sstore, {getRuntimeManager().getEnvPtr(), m_args[0], m_args[1]}); // Uses native endianness
} }
llvm::Value* Ext::calldataload(llvm::Value* _index) llvm::Value* Ext::calldataload(llvm::Value* _index)
@ -101,9 +121,9 @@ llvm::Value* Ext::calldataload(llvm::Value* _index)
llvm::Value* Ext::balance(llvm::Value* _address) llvm::Value* Ext::balance(llvm::Value* _address)
{ {
auto address = Endianness::toBE(m_builder, _address); auto address = Endianness::toBE(m_builder, _address);
m_builder.CreateStore(address, m_args[0]); auto ret = getArgAlloca();
createCall(EnvFunc::balance, {getRuntimeManager().getEnvPtr(), m_args[0], m_args[1]}); createCall(EnvFunc::balance, {getRuntimeManager().getEnvPtr(), byPtr(address), ret});
return m_builder.CreateLoad(m_args[1]); return m_builder.CreateLoad(ret);
} }
llvm::Value* Ext::create(llvm::Value*& _gas, llvm::Value* _endowment, llvm::Value* _initOff, llvm::Value* _initSize) llvm::Value* Ext::create(llvm::Value*& _gas, llvm::Value* _endowment, llvm::Value* _initOff, llvm::Value* _initSize)
@ -149,8 +169,7 @@ llvm::Value* Ext::sha3(llvm::Value* _inOff, llvm::Value* _inSize)
MemoryRef Ext::getExtCode(llvm::Value* _addr) MemoryRef Ext::getExtCode(llvm::Value* _addr)
{ {
auto addr = Endianness::toBE(m_builder, _addr); auto addr = Endianness::toBE(m_builder, _addr);
m_builder.CreateStore(addr, m_args[0]); auto code = createCall(EnvFunc::getExtCode, {getRuntimeManager().getEnvPtr(), byPtr(addr), m_size});
auto code = createCall(EnvFunc::getExtCode, {getRuntimeManager().getEnvPtr(), m_args[0], m_size});
auto codeSize = m_builder.CreateLoad(m_size); auto codeSize = m_builder.CreateLoad(m_size);
auto codeSize256 = m_builder.CreateZExt(codeSize, Type::Word); auto codeSize256 = m_builder.CreateZExt(codeSize, Type::Word);
return {code, codeSize256}; return {code, codeSize256};

4
libevmjit/Ext.h
View file

@ -72,8 +72,12 @@ private:
llvm::Value* m_data = nullptr; llvm::Value* m_data = nullptr;
std::array<llvm::Function*, sizeOf<EnvFunc>::value> m_funcs = {}; std::array<llvm::Function*, sizeOf<EnvFunc>::value> m_funcs = {};
std::array<llvm::Value*, 8> m_argAllocas = {};
size_t m_argCounter = 0;
llvm::CallInst* createCall(EnvFunc _funcId, std::initializer_list<llvm::Value*> const& _args); llvm::CallInst* createCall(EnvFunc _funcId, std::initializer_list<llvm::Value*> const& _args);
llvm::Value* getArgAlloca();
llvm::Value* byPtr(llvm::Value* _value);
}; };