[PATCH] D22998: [coroutines] Part 4a: Coroutine Devirtualization: Lower coro.resume and coro.destroy.

[Gor Nishanov via llvm-commits]

GorNishanov created this revision.
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This is the forth patch in the coroutine series. CoroEaly pass now lowers coro.resume 
and coro.destroy intrinsics by replacing them with an indirect call to an address
returned by coro.subfn.addr intrinsic. This is done so that CGPassManager recognizes
devirtualization when CoroElide replaces a call to coro.subfn.addr with an appropriate 
function address.

Documentation and overview is here: http://llvm.org/docs/Coroutines.html.

Upstreaming sequence (rough plan)
 1.Add documentation. (https://reviews.llvm.org/D22603)
 2.Add coroutine intrinsics. (https://reviews.llvm.org/D22659)
 3.Add empty coroutine passes. (https://reviews.llvm.org/D22847)
 4.Add coroutine devirtualization + tests.
    a) Lower coro.resume and coro.destroy <= we are here
    b) Handle invoke resumers
    c) Do devirtualization
 5.Add CGSCC restart trigger + tests.
 6.Add coroutine heap elision + tests.
 7.Add the rest of the logic (split into more patches)

Repository:
  rL LLVM

https://reviews.llvm.org/D22998

Files:
  lib/Transforms/Coroutines/CoroEarly.cpp
  lib/Transforms/Coroutines/CoroInstr.h
  lib/Transforms/Coroutines/CoroInternal.h
  lib/Transforms/Coroutines/Coroutines.cpp
  test/Transforms/Coroutines/coro-early.ll

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