[LLVMdev] Can WriteBitcodeToFile be parallelized?

[Yuri]

On 03/31/2014 15:29, Nick Lewycky wrote:
> Note that we require the output to be deterministic, so what exactly 
> would you be doing? Performing the write out to a memory buffer for 
> each function, then another thread which passes through these memory 
> buffers sequentially and issues the actual I/O calls?

If there are N CPUs, and the list of functions to be processed, one can 
split the list in N roughly equal sublists, and process them separately 
as much as possible. Then in the end merge the resulting code into one 
block, and resolve the remaining inter-sublist relocation items. Same 
with the DWARF part.

This can produce equivalent binaries if implemented correctly.


> I've never heard this proposed before. Are you interested in working 
> on it?

I normally would have been interested, but have no time currently.

Yuri