Module dce

Dead Code Elimination

This optimization removes unused definitions. The pass is a combination of:

1. A liveness analysis that keeps track of the uses of a definition,
2. At the time of inspecting a definition, if it has no uses, it is removed.

This pass does not do CFG transformations. That is handled by simplify_cfg.

Constants

DCE_NAME

GLOBALS_DCE_NAME

Functions

create_dce_pass

create_globals_dce_pass

dce

Perform dead code (if any) elimination and return true if the function is modified.

globals_dce

Remove entire functions and globals from a module based on whether they are called / used or not, using a list of root ‘entry’ functions to perform a search.