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Greetings, We present “Machine Function Splitter”, a codegen optimization pass which splits functions into hot and cold parts. This pass leverages the basic block sections feature recently introduced in LLVM from the Propeller project. The pass targets functions with profile coverage, identifies cold blocks and moves them to a separate section. The linker groups all cold blocks across functions

>Exceptions >All eh pads are grouped together regardless of their coldness and are part of the original function. There are outstanding issues with splitting eh pads if they reside in separate sections in the binary. This remains as part of future work. Can you elaborate more on the outstanding issues with splitting eh pads? From my dip into the unwind map in gcc_except_table the

On Tue, Aug 4, 2020 at 10:51 PM aditya kumar <hiraditya at gmail.com> wrote: > Glad to hear that there is an interest in a function splitting pass. There > are advantages to splitting functions at different stages as you've already > noted. > Right -- with slightly different objectives. Machine Function Splitting Pass's main focus is on performance improvement. > -