Method query

src/cpp-ethereum/evmjit/libevmjit/Ext.cpp:313–353

}

llvm::Value* Ext::query(evm_query_key _key)
{
	auto func = getQueryFunc(getModule());
	auto undef = llvm::UndefValue::get(Type::WordPtr);
	auto pResult = getArgAlloca();
	createCABICall(func, {pResult, getRuntimeManager().getEnvPtr(), m_builder.getInt32(_key), undef});
	llvm::Value* v = m_builder.CreateLoad(pResult);

	switch (_key)
	{
	case EVM_GAS_PRICE:
	case EVM_DIFFICULTY:
		v = Endianness::toNative(m_builder, v);
		break;
	case EVM_ADDRESS:
	case EVM_CALLER:
	case EVM_ORIGIN:
	case EVM_COINBASE:
	{
		auto mask160 = llvm::APInt(160, -1, true).zext(256);
		v = Endianness::toNative(m_builder, v);
		v = m_builder.CreateAnd(v, mask160);
		break;
	}
	case EVM_GAS_LIMIT:
	case EVM_NUMBER:
	case EVM_TIMESTAMP:
	{
		// Use only 64-bit -- single word. The rest is uninitialized.
		// We could have mask 63 bits, but there is very little to gain in cost
		// of additional and operation.
		auto mask64 = llvm::APInt(256, std::numeric_limits<uint64_t>::max());
		v = m_builder.CreateAnd(v, mask64);
		break;
	}
	default:
		break;
	}

	return v;
}

llvm::Value* Ext::balance(llvm::Value* _address)
{