[llvm-dev] RFC: We should stop merging allocas in the inliner

Chandler Carruth via llvm-dev llvm-dev at lists.llvm.org
Mon Aug 1 11:12:40 PDT 2016


On Mon, Aug 1, 2016 at 10:26 AM Daniel Berlin via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> In any case, i think this is going to derail chandler's question if we
> continue on this thread and not a new one :)
>

Thanks. ;] I really don't want to deep dive into ways that lifetime markers
are broken or could be improved unless they are so broken that they won't
suffice to replace the merging done by the inliner.

AFAICT, the merging done by the inliner is quite weak and the lifetime
markers are already going to be more powerful (and in fact, we turn the
merging off in a pile of cases and rely pretty much exclusively on the
lifetime markers there).
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