On Sun, Jul 28, 2024 at 01:29:59PM -0700, Rong Xu wrote: > Add the build support for using Clang's Propeller optimizer. Like > AutoFDO, Propeller uses hardware sampling to gather information > about the frequency of execution of different code paths within a > binary. This information is then used to guide the compiler's > optimization decisions, resulting in a more efficient binary. > > The support requires a Clang compiler LLVM 19 or later, and the > create_llvm_prof tool > (https://github.com/google/autofdo/releases/tag/v0.30.1). This What's the relation between this and llvm-profgen? Is the above simply a google 'internal' proof of concept thing that will eventually make its way into llvm-profgen? It seems a bit weird LLVM landed propeller without the required profile generation tool.
