Function GetOperandIndexForOperandUsages

mediumlevelilinstruction.cpp:251–303

static unordered_map<BNMediumLevelILOperation, unordered_map<MediumLevelILOperandUsage, size_t>>
    GetOperandIndexForOperandUsages()
{
	unordered_map<BNMediumLevelILOperation, unordered_map<MediumLevelILOperandUsage, size_t>> result;
	result.reserve(MediumLevelILInstructionBase::operationOperandUsage.size());
	for (auto& operation : MediumLevelILInstructionBase::operationOperandUsage)
	{
		result[operation.first] = unordered_map<MediumLevelILOperandUsage, size_t>();
		result[operation.first].reserve(operation.second.size());
		size_t operand = 0;
		for (auto usage : operation.second)
		{
			result[operation.first][usage] = operand;
			switch (usage)
			{
			case PartialSSAVariableSourceMediumLevelOperandUsage:
				// SSA variables are usually two slots, but this one has a previously defined
				// variables and thus only takes one slot
				operand++;
				break;
			case OutputVariablesSubExprMediumLevelOperandUsage:
			case UntypedParameterExprsMediumLevelOperandUsage:
				// Represented as subexpression, so only takes one slot even though it is a list
				operand++;
				break;
			case OutputSSAVariablesSubExprMediumLevelOperandUsage:
				// OutputSSAMemoryVersionMediumLevelOperandUsage follows at same operand
				break;
			case UntypedParameterSSAExprsMediumLevelOperandUsage:
				// ParameterSSAMemoryVersionMediumLevelOperandUsage follows at same operand
				break;
			default:
				switch (MediumLevelILInstructionBase::operandTypeForUsage[usage])
				{
				case SSAVariableMediumLevelOperand:
				case IndexListMediumLevelOperand:
				case IndexMapMediumLevelOperand:
				case VariableListMediumLevelOperand:
				case SSAVariableListMediumLevelOperand:
				case ExprListMediumLevelOperand:
					// SSA variables and lists take two operand slots
					operand += 2;
					break;
				default:
					operand++;
					break;
				}
				break;
			}
		}
	}
	return result;
}


unordered_map<BNMediumLevelILOperation, unordered_map<MediumLevelILOperandUsage, size_t>>