[llvm-dev] RFC: speedups with instruction side-data (ADCE, perhaps others?)

[Steve King via llvm-dev]

On Mon, Sep 14, 2015 at 9:37 AM, escha via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Are there any other passes that could benefit from having a single bit (or similarly small amount) of per-Instruction metadata local to the pass, i.e. to avoid having to keep a side-Set of instructions...

FWIW, I have a target specific pass that needs exactly this sort of
tracking.  Once you offer 1 bit, it's a slippery slope to giving a
whole pointer.  I like your idea regardless.