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Code Generation Reports

When you enable report generation or an error occurs, fiaccel generates a code generation report. Use the report to debug your MATLAB® functions and verify that they are suitable for code generation. The report provides type information for the variables and expressions in your functions. This information helps you to find sources of error messages and to understand type propagation rules.

Report Generation

To control generation and opening of the report, use fiaccel options:

  • To generate a report, use the -report option.

  • To generate and open a report, use the -launchreport option.

Alternatively, use configuration object properties:

  • To generate a report, set GenerateReport to true.

  • If you want fiaccel to open the report for you, set LaunchReport to true.

Report Location

The code generation report is named report.mldatx. It is located in the html subfolder of the code generation output folder. If you have MATLAB R2018a or later, you can open the report.mldatx file by double-clicking it.

Errors and Warnings

View code generation error, warning, and information messages on the All Messages tab. To highlight the source code for an error or warning, click the message. It is a best practice to address the first message because subsequent errors and warnings can be related to the first message.

Files and Functions

In the MATLAB Source pane, the Function List view organizes functions according to the containing file. To visualize functions according to the call structure, use the Call Tree view.

To view a function in the code pane of the report, click the function in the list. Clicking a function opens the file that contains the function. To edit the selected file in the MATLAB Editor, click Edit in MATLAB or click a line number in the code pane.

Specialized Functions or Classes

When a function is called with different types of inputs or a class uses different types for its properties, the code generator produces specializations. In the MATLAB Source pane, numbered functions (or classes) indicate specializations. For example:


To view a MATLAB function in the code pane, click the name of the function in the MATLAB Source pane. In the code pane, when you pause on a variable or expression, a tooltip displays information about its size, type, and complexity. Additionally, syntax highlighting helps you to identify MATLAB syntax elements and certain code generation attributes, such as whether a function is extrinsic or whether an argument is constant.

Extrinsic Functions

The report identifies an extrinsic function with purple text. The tooltip indicates that the function is extrinsic.

Constant Arguments

Orange text indicates a compile-time constant argument to an entry-point function or a specialized function. The tooltip includes the constant value.

Knowing the value of a constant argument helps you to understand the generated function signatures. It also helps you to see when code generation creates function specializations for different constant argument values.

To export the value to a variable in the workspace, click the Export icon .

MATLAB Variables

The Variables tab provides information about the variables for the selected MATLAB function. To select a function, click the function in the MATLAB Source pane.

The variables table shows:

  • Class, size, and complexity

  • Properties of fixed-point types

This information helps you to understand type propagation and identify type mismatch errors.

Visual Indicators on the Variables Tab

This table describes the symbols, badges, and other indicators in the variables table.

Column in the Variables TableIndicatorDescription
NameexpanderVariable has elements or properties that you can see by clicking the expander.
Name{:}Homogenous cell array (all elements have the same properties).
Name{n}nth element of a heterogeneous cell array.
Classv > nv is reused with a different class, size, and complexity. The number n identifies a reuse with a unique set of properties. When you pause on a renamed variable, the report highlights only the instances of this variable that share the class, size, and complexity. See Reuse the Same Variable with Different Properties.
Size:nVariable-size array with an upper bound of n.
Size:?Variable-size array with no upper bound.
SizeitalicsVariable-size array whose dimensions do not change size during execution.
Classsparse prefixSparse array.
Classcomplex prefixComplex number.

Fixed-point type.

To see the fixed-point properties, click the badge.

Code Insights

If you enable potential differences reporting, you can view the messages on the Code Insights tab. The report includes potential differences messages only if you enabled potential differences reporting. See Potential Differences Reporting.

Report Limitations

  • The entry-point summary shows the individual elements of varargin and varargout, but the variables table does not show them.

  • The report does not show full information for unrolled loops. It displays data types of one arbitrary iteration.

  • The report does not show information about dead code.

See Also

Related Topics