[llvm-dev] How can I tell llvm, that a branch is preferred ?

Diego Novillo via llvm-dev llvm-dev at lists.llvm.org
Tue Oct 27 11:03:26 PDT 2015

On Tue, Oct 27, 2015 at 10:55 AM, Nat! via llvm-dev <llvm-dev at lists.llvm.org
> wrote:

> If I read the llvm language correctly, it doesn't have a way to specify
> the preferred branch, correct ? I see nothing in the specs for "branch" or
> "switch". And __buildin_expect does nothing, that I am sure of.
Well, you could generate a !prof annotation to specify branch weights that
are then used when computing branch probability and block frequencies (

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