Modular•11mo ago

Prevent inline

Does anyone know a trick or official means to prevent a function from being inlined? Any ugly trick would be fine.

6 Replies

Does Mojo inline functions by default? The Mojo compiler has always been taunted as simple because it doesn't do all this compiler magic unless you explicitly tell it to.

Henk-Jan LebbinkOP•11mo ago

One of the mayor selling point (for me) is that Mojo does the most imaginable optimizations currently available. compiling C++ to MLIR and lowering all the way back to assembly is neat, but the first step C++ to MLIR will loose many intentions a C++ programmer may have had. Mojo is (for me) a nice MLIR syntax. As a result the "compiler magic" is maximal. That also means that almost everything get inlined... which may not be what you need when debugging stuff...

Sardor•11mo ago

Yes, mojo does .

Normally the compiler will do this automatically where it improves performance, but this decorator forces it to occur, the downside is that it can increase the binary size for the duplicated functions

Normally the compiler will do this automatically where it improves performance, but this decorator forces it to occur, the downside is that it can increase the binary size for the duplicated functions

https://mojodojo.dev/guides/decorators/always_inline.html

@always_inline | Mojo Dojo

Learning Resources for Mojo 🔥

Melody Daniel•11mo ago

I see. Basically we need a decorator that says "don't inline".

benny•11mo ago

you can add -0O (that’s a zero then a capital O) to mojo build to prevent inlining stands for zero optimizations

Melody Daniel•11mo ago

Ah, nice

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Prevent inline