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store8 function added as implementation of MSTORE8 

[#80191662]
cl-refactor
Paweł Bylica 10 years ago
parent
2df83af3be
commit
0400b47357
2 changed files with 47 additions and 38 deletions
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  1. 77
      evmcc/Memory.cpp
  2. 8
      evmcc/Memory.h

77
evmcc/Memory.cpp
View File

@ -51,40 +51,48 @@ Memory::Memory(llvm::IRBuilder<>& _builder, llvm::Module* _module)
m_size->setUnnamedAddr(true); // Address is not important
m_resize = llvm::Function::Create(llvm::FunctionType::get(Type::BytePtr, Type::WordPtr, false), llvm::Function::ExternalLinkage, "mem_resize", _module);
m_storeWord = createStoreFunc(Type::i256, _module);
m_storeByte = createStoreFunc(Type::Byte, _module);
}
llvm::Function* Memory::createStoreFunc(llvm::Type* _valueType, llvm::Module* _module)
{
auto wordValue = _valueType == Type::i256;
llvm::Type* storeArgs[] = {Type::i256, Type::i256};
m_store = llvm::Function::Create(llvm::FunctionType::get(Type::Void, storeArgs, false), llvm::Function::PrivateLinkage, "mem.store", _module);
auto origBB = m_builder.GetInsertBlock();
auto origPt = m_builder.GetInsertPoint();
llvm::Type* storeArgs[] = {Type::i256, _valueType};
auto name = wordValue ? "store" : "store8";
auto storeFunc = llvm::Function::Create(llvm::FunctionType::get(Type::Void, storeArgs, false), llvm::Function::PrivateLinkage, name, _module);
auto checkBB = llvm::BasicBlock::Create(m_store->getContext(), "check", m_store);
auto resizeBB = llvm::BasicBlock::Create(m_store->getContext(), "resize", m_store);
auto storeBB = llvm::BasicBlock::Create(m_store->getContext(), "store", m_store);
auto checkBB = llvm::BasicBlock::Create(storeFunc->getContext(), "check", storeFunc);
auto resizeBB = llvm::BasicBlock::Create(storeFunc->getContext(), "resize", storeFunc);
auto storeBB = llvm::BasicBlock::Create(storeFunc->getContext(), "store", storeFunc);
m_builder.SetInsertPoint(checkBB);
llvm::Value* index = m_store->arg_begin();
llvm::IRBuilder<> builder(checkBB);
llvm::Value* index = storeFunc->arg_begin();
index->setName("index");
llvm::Value* value = ++m_store->arg_begin();
llvm::Value* value = ++storeFunc->arg_begin();
value->setName("value");
auto sizeRequired = m_builder.CreateAdd(index, m_builder.getIntN(256, 32), "sizeRequired");
auto size = m_builder.CreateLoad(m_size, "size");
auto resizeNeeded = m_builder.CreateICmpULE(sizeRequired, size, "resizeNeeded");
m_builder.CreateCondBr(resizeNeeded, resizeBB, storeBB); // OPT branch weights?
m_builder.SetInsertPoint(resizeBB);
m_builder.CreateStore(sizeRequired, m_size);
llvm::Value* data = m_builder.CreateCall(m_resize, m_size, "data");
m_builder.CreateStore(data, m_data);
m_builder.CreateBr(storeBB);
m_builder.SetInsertPoint(storeBB);
data = m_builder.CreateLoad(m_data, "data");
auto ptr = m_builder.CreateGEP(data, index, "ptr");
ptr = m_builder.CreateBitCast(ptr, Type::WordPtr, "wordPtr");
m_builder.CreateStore(value, ptr);
m_builder.CreateRetVoid();
m_builder.SetInsertPoint(origBB, origPt);
auto valueSize = _valueType->getPrimitiveSizeInBits() / 8;
auto sizeRequired = builder.CreateAdd(index, builder.getIntN(256, valueSize), "sizeRequired");
auto size = builder.CreateLoad(m_size, "size");
auto resizeNeeded = builder.CreateICmpULE(sizeRequired, size, "resizeNeeded");
builder.CreateCondBr(resizeNeeded, resizeBB, storeBB); // OPT branch weights?
builder.SetInsertPoint(resizeBB);
builder.CreateStore(sizeRequired, m_size);
auto newData = builder.CreateCall(m_resize, m_size, "newData");
builder.CreateStore(newData, m_data);
builder.CreateBr(storeBB);
builder.SetInsertPoint(storeBB);
auto data = builder.CreateLoad(m_data, "data");
auto ptr = builder.CreateGEP(data, index, "ptr");
if (wordValue)
ptr = builder.CreateBitCast(ptr, Type::WordPtr, "wordPtr");
builder.CreateStore(value, ptr);
builder.CreateRetVoid();
return storeFunc;
}
@ -108,19 +116,15 @@ llvm::Value* Memory::loadWord(llvm::Value* _addr)
void Memory::storeWord(llvm::Value* _addr, llvm::Value* _word)
{
m_builder.CreateCall2(m_store, _addr, _word);
m_builder.CreateCall2(m_storeWord, _addr, _word);
dump(0);
}
void Memory::storeByte(llvm::Value* _addr, llvm::Value* _word)
{
auto byte = m_builder.CreateTrunc(_word, m_builder.getInt8Ty(), "byte");
auto index = m_builder.CreateTrunc(_addr, m_builder.getInt64Ty(), "index");
auto base = m_builder.CreateCall(m_memRequire, index, "base");
auto ptr = m_builder.CreateGEP(base, index, "ptr");
m_builder.CreateStore(byte, ptr);
auto byte = m_builder.CreateTrunc(_word, Type::Byte, "byte");
m_builder.CreateCall2(m_storeByte, _addr, byte);
dump(0);
}
@ -152,7 +156,6 @@ extern "C"
EXPORT uint8_t* mem_resize(i256* _size)
{
assert(false);
auto size = _size->a; // Trunc to 64-bit
auto& memory = Runtime::getMemory();
memory.resize(size);

8
evmcc/Memory.h
View File

@ -11,6 +11,8 @@ class Memory
{
public:
Memory(llvm::IRBuilder<>& _builder, llvm::Module* _module);
Memory(const Memory&) = delete;
void operator=(Memory) = delete;
llvm::Value* loadWord(llvm::Value* _addr);
void storeWord(llvm::Value* _addr, llvm::Value* _word);
@ -19,13 +21,17 @@ public:
void dump(uint64_t _begin, uint64_t _end = 0);
private:
llvm::Function* createStoreFunc(llvm::Type* _type, llvm::Module* _module);
private:
llvm::IRBuilder<>& m_builder;
llvm::GlobalVariable* m_data;
llvm::GlobalVariable* m_size;
llvm::Function* m_store;
llvm::Function* m_storeWord;
llvm::Function* m_storeByte;
llvm::Function* m_resize;
llvm::Function* m_memRequire;

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