ARMCC: Information About Optimization Level During Runtime

Information in this knowledgebase article applies to:

• Arm Compiler 5

QUESTION

During the runtime, I would like to see the information about the optimization level of my program.

Is there any compiler directive or pragma options to check such an information?

ANSWER

It is possible to get the information about the optimization levels during the run and compile time.

To know the optimization level at runtime, use the predefined macro __OPTIMISE_LEVEL in your source code. This predefined macro can be assigned to a constant variable and corresponding value of optimization can be extracted from this variable during the run time, such as:

unsinged int i =__OPTIMISE_LEVEL;

To know the optimization level at compile-time, check the compiler control string.

MORE INFORMATION

• Refer to Arm C/C++ Compiler in the µVision User's Guide.

SEE ALSO

• Refer to µVision: Changing Optimization Levels for a Project/Group/File/Functio

Last Reviewed: Monday, February 15, 2021