[llvm-bugs] [Bug 46974] Add specializations of small std::tuple to reduce pre-optimization code generation

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46974

Louis Dionne <ldionne at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ldionne at apple.com
         Resolution|---                         |WONTFIX
             Status|NEW                         |RESOLVED

--- Comment #1 from Louis Dionne <ldionne at apple.com> ---
std::tuple is a very complex beast, and adding specializations for small tuples
would add a huge amount of code complexity (consider that we'd still have to do
EBO for these specializations). Basically, I don't believe there's enough bang
for the buck.

Instead, I think it's better to teach LLVM to optimize tuples better. If you
have a reproducer that behaves badly, please add it here and we can move to the
proper component. In the meantime, marking as WONTFIX (but please do return the
bug if you have a reproducer and we'll forward to LLVM).

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