luau-lang / luau

A fast, small, safe, gradually typed embeddable scripting language derived from Lua

https://luau-lang.org

MIT License

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Sync to upstream/release/624 #1245

Closed andyfriesen closed 2 months ago

andyfriesen commented 2 months ago

What's changed?

Optimize table.maxn. This function is now 5-14x faster
Reserve Luau stack space for error message.

New Solver

Globals can be type-stated, but only if they are already in scope
Fix a stack overflow that could occur when normalizing certain kinds of recursive unions of intersections (of unions of intersections...)
Fix an assertion failure that would trigger when the __iter metamethod has a bad signature

Native Codegen

Type propagation and temporary register type hints
Direct vector property access should only happen for names of right length
BytecodeAnalysis will only predict that some of the vector value fields are numbers

Internal Contributors

Co-authored-by: Alexander McCord amccord@roblox.com Co-authored-by: Andy Friesen afriesen@roblox.com Co-authored-by: Aviral Goel agoel@roblox.com Co-authored-by: Vyacheslav Egorov vegorov@roblox.com