MoonVeil-Docs/content/docs/options/flatten-control-flow.md

weight	title	description	icon	date	lastmod
100	Flatten control flow	Control flow flattener	article	2025-05-01T18:47:58-05:00	2025-05-01T18:47:58-05:00

This option will enable the Control Flow Flattener (CFF). This feature is conservative in it's estimates of what can be flattened, if a block can't be flattened without side effects, it will be discarded from the flattening queue. CFF is applied recursively to failed blocks, meaning if a block is discarded from the flattening queue, its children may be flattened individually.

The control flow flattener supports the following branching syntaxes:

• if statements
• while and repeat loops
• numeric for loops
• for-in loops and even support for Luau's generalized iteration

The following child options are available:

• Wrap CFF blocks: This will move some CFF blocks into their own closure in a lookup table.
• Hoist locals: Will move local storage into a lookup table for CFF blocks. Useful to cut down on the number of used locals.