Optimizations in IAR

Project-Wide Optimizations

Project Options → C/C++ Compiler → Optimizations

../_images/iar_optim_level_project.png

Project-level optimization setting in IAR

Single-File Optimizations

  1. Right-click on the file in the Workspace pane.

  2. Choose Options.

  3. Check Override inherited Settings.

  4. Choose the optimization level.

Single-Function Optimizations

Warning

Pragmas are very specific to the toolchain, and may lead to non-reusable code. Be careful where you use these.

Use #pragma optimize=none before the function definition to deoptimize the entire function, that is, as follows.

Function-level optimization setting in IAR
#pragma optimize=none
static void myFunction(int number)
{
    // ...
    return yourFunction(other_number);
}