LLVM split functions in hot/cold regions optimization (PGO)

[Johan]

On Monday, 31 August 2020 at 23:46:24 UTC, Jon Degenhardt wrote:
> On Monday, 31 August 2020 at 23:31:31 UTC, Johan wrote:
>> LLVM gained an interesting new optimization pass to split 
>> functions in hot/cold regions based on PGO profile data:
>> https://reviews.llvm.org/rG94faadaca4e
>
> Very interesting. Will LDC gain this optimization pass simply 
> by upgrading the LLVM version, or will it be necessary to 
> update LDC's PGO as well?

Upgrading LLVM, and enabling it with a cmdline flag (not enabled 
by default at the moment). It seems to use the already existing 
PGO profile data.


-Johan