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75 lines
2.6 KiB
75 lines
2.6 KiB
10 years ago
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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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