[PATCH] [Review Request] Function-based parallel LLVM backend code generation

[Renato Golin]

On 8 October 2013 19:28, Hal Finkel <hfinkel at anl.gov> wrote:

> I think that, in the common case, the 'root' of the compilation tree is
> where LTO optimizations are done (when building the final executable or
> shared library), and at that point, there is limited make-level parallelism
> available. There are obviously counter examples (like our test suite), but
> so long as we provide an easy way to turn off the extra threading, I think
> that it will help most people.
>

In that case, specifically, it probably helps.

What about a Debug build of LLVM, that (when using gnu ld), can take
several GB or RAM and trash the disk. Would the extra work create more
copies of the tree, or more disk read, or anything?

cheers,
--renato
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