[LLVMdev] Inlining and virtualization in Clang/LLVM

Krzysztof Parzyszek kparzysz at codeaurora.org
Sat Sep 29 20:15:50 PDT 2012

On 9/29/2012 8:39 AM, Matthieu Monrocq wrote:
> I admit that reducing the virtual call overhead is probably not really
> worth it (in general), however devirtualizing calls also expose more
> inlining/context opportunities and it's hard (for me) to quantify what
> such an optimization could bring here.

More precise aliasing information, eliminating the need for a thunk (or 
likes of it), removing the unpredicability of the indirect branch, etc. 
  If you can get rid of an indirect branch in favor of a direct one, 
it's a win.

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