Method getStackVariable

src/bin2llvmir/utils/ir_modifier.cpp:544–576

* Get or create&get stack variable. * @param fnc Function owning the stack variable. * @param offset Stack varibale's offset. * @param type Stack varibale's type. * @param name Stack varibale's name in IR. If not set default name is used. * Offset is always appended to this name. If you want to get * this name to output C, set it as a real name to returned

 *         stack var.
 */
IrModifier::StackPair IrModifier::getStackVariable(
		llvm::Function* fnc,
		int offset,
		llvm::Type* type,
		const std::string& name,
		const std::string& realName,
		bool fromDebug)
{
	if (!PointerType::isValidElementType(type) || !type->isSized())
	{
		type = Abi::getDefaultType(fnc->getParent());
	}

	std::string n = names::generateStackVarName(offset, name);

	AllocaInst* ret = _config->getLlvmStackVariable(fnc, offset);
	if (ret)
	{
		auto* csv = _config->getConfigStackVariable(ret);
		assert(csv);
		return {ret, csv};
	}

	ret = new AllocaInst(type, Abi::DEFAULT_ADDR_SPACE, n);

	auto it = inst_begin(fnc);
	assert(it != inst_end(fnc)); // -> create bb, insert alloca.
	ret->insertBefore(&*it);

	auto* csv = _config->insertStackVariable(ret, offset, fromDebug, realName);

	return {ret, csv};
}

/**
 * Get global variable from the given address @a addr in @a objf input file.