5 changed files with 124 additions and 89 deletions
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#include "Compiler.h" |
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#include <llvm/IR/IRBuilder.h> |
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#include <llvm/IR/Module.h> |
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namespace evmcc |
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{ |
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Compiler::Compiler() |
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{ |
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auto& context = llvm::getGlobalContext(); |
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Types.word8 = llvm::Type::getInt8Ty(context); |
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Types.word8ptr = llvm::Type::getInt8PtrTy(context); |
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Types.word256 = llvm::Type::getIntNTy(context, 256); |
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Types.word256ptr = Types.word256->getPointerTo(); |
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Types.word256arr = llvm::ArrayType::get(Types.word256, 100); |
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Types.size = llvm::Type::getInt64Ty(context); |
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} |
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void Compiler::compile(const dev::bytes& bytecode) |
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{ |
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using namespace llvm; |
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auto& context = getGlobalContext(); |
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Module* module = new Module("main", context); |
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IRBuilder<> builder(context); |
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// Create globals for memory, memory size, stack and stack top
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auto memory = new GlobalVariable(*module, Types.word8ptr, false, |
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GlobalValue::LinkageTypes::PrivateLinkage, |
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Constant::getNullValue(Types.word8ptr), "memory"); |
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auto memSize = new GlobalVariable(*module, Types.size, false, |
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GlobalValue::LinkageTypes::PrivateLinkage, |
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ConstantInt::get(Types.size, 0), "memsize"); |
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auto stack = new GlobalVariable(*module, Types.word256arr, false, |
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GlobalValue::LinkageTypes::PrivateLinkage, |
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ConstantAggregateZero::get(Types.word256arr), "stack"); |
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auto stackTop = new GlobalVariable(*module, Types.size, false, |
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GlobalValue::LinkageTypes::PrivateLinkage, |
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ConstantInt::get(Types.size, 0), "stackTop"); |
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// Create value for void* malloc(size_t)
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std::vector<Type*> mallocArgTypes = { Types.size }; |
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Value* mallocVal = Function::Create(FunctionType::get(Types.word8ptr, mallocArgTypes, false), |
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GlobalValue::LinkageTypes::ExternalLinkage, "malloc", module); |
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// Create main function
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FunctionType* funcType = FunctionType::get(llvm::Type::getInt32Ty(context), false); |
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Function* mainFunc = Function::Create(funcType, Function::ExternalLinkage, "main", module); |
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BasicBlock* entryBlock = BasicBlock::Create(context, "entry", mainFunc); |
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builder.SetInsertPoint(entryBlock); |
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// Initialize memory with call to malloc, update memsize
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std::vector<Value*> mallocMemArgs = { ConstantInt::get(Types.size, 100) }; |
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auto mallocMemCall = builder.CreateCall(mallocVal, mallocMemArgs, "malloc_mem"); |
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builder.CreateStore(mallocMemCall, memory); |
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builder.CreateStore(ConstantInt::get(Types.size, 100), memSize); |
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/*
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std::vector<Value*> mallocStackArgs = { ConstantInt::get(sizeTy, 200) }; |
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auto mallocStackCall = builder.CreateCall(mallocVal, mallocStackArgs, "malloc_stack"); |
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auto mallocCast = builder.CreatePointerBitCastOrAddrSpaceCast(mallocStackCall, int256ptr); |
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builder.CreateStore(mallocCast, stackVal); |
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*/ |
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builder.CreateRet(ConstantInt::get(Type::getInt32Ty(context), 0)); |
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module->dump(); |
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} |
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} |
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#pragma once |
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#include <llvm/IR/Type.h> |
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#include <libdevcore/Common.h> |
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namespace evmcc |
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{ |
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class Compiler |
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{ |
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private: |
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struct |
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{ |
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llvm::Type* word8; |
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llvm::Type* word8ptr; |
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llvm::Type* word256; |
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llvm::Type* word256ptr; |
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llvm::Type* word256arr; |
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llvm::Type* size; |
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} Types; |
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public: |
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Compiler(); |
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void compile(const dev::bytes& bytecode); |
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}; |
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} |
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