[LLVMdev] Inlining in LLVM

[Chuck Zhao]

Nelson,

As far as I know, there are only 2 inliners available in LLVM (2.7 and 
2.8 releases):

InlineSimple: inline callsites according to simple analysis heuristics

InlneAlways: inline callsites whose callee definitions have the 
__attribute__((alwayeinline)) attribute on.

For an early inliner, if doesn't exist, it should be relatively straight 
forward to write one.


Chuck


On 10/24/2010 1:23 PM, J Nelson Amaral wrote:
> Duncan:
>
> I am only superficially familiar with LLVM structure.
>
> What I am trying to find out is if functions that have a single 
> invocation are still found in the code during the compilation.
>
> In Open64 and other compilers, there is an early inlining pass that 
> inlines all procedures that have a single invocation site. The 
> reasoning is that if there is a single call to a procedure, then there 
> is not downside to inlining it.
>
> Does LLVM usually does that? Or would that be left to whatever 
> front-end is being used?
>
> -- 
>         Cheers,
>
>                 Nelson
>
>            /
>     \     /  /   Jose Nelson Amaral - amaral at cs.ualberta.ca 
> <mailto:amaral at cs.ualberta.ca>
>      )   /  (    Professor
>     /   /    \   Dept. of Computing Science - University of Alberta
>    (   /      )  Edmonton, Alberta, Canada, T6G 2E8
>     \ O      /   Phone: (780)492-5411      Fax: (780)492-1071
>      \      / http://www.cs.ualberta.ca/~amaral 
> <http://www.cs.ualberta.ca/%7Eamaral>
>       `----'
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20101024/5bdf9b26/attachment.html>