Keil Logo

Global Register Coloring

Global register coloring works across a complete application. When enabled, the linker generates a register definition file that contains a table of registers used by each function. The compiler uses this table to optimize register usage. Your project is re-compiled iteratively until no further register optimization is possible.

When global register coloring is enabled, compiler knows the registers used by each function. Registers that are not altered in external functions can be used to hold register variables. The code generated by the compiler requires less data and code space and executes faster.

To enable global register coloring, the REGFILE compiler directive and the REGFILE linker directive must be specified.

  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.