[all-commits] [llvm/llvm-project] 7782e0: [Coroutines] Only do symmetric transfer if optimiz...

[Chuanqi Xu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7782e080e80a90f7bb32049beb3787e2118c2251
      https://github.com/llvm/llvm-project/commit/7782e080e80a90f7bb32049beb3787e2118c2251
  Author: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
  Date:   2022-06-20 (Mon, 20 Jun 2022)

  Changed paths:
    M llvm/include/llvm/Transforms/Coroutines/CoroSplit.h
    M llvm/lib/Passes/PassBuilder.cpp
    M llvm/lib/Passes/PassRegistry.def
    M llvm/lib/Transforms/Coroutines/CoroFrame.cpp
    M llvm/lib/Transforms/Coroutines/CoroInternal.h
    M llvm/lib/Transforms/Coroutines/CoroSplit.cpp
    M llvm/test/Transforms/Coroutines/coro-debug-O2.ll
    M llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-00.ll
    M llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-01.ll
    M llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-02.ll
    M llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-04.ll
    M llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-05.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail1.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail2.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail3.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail4.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail5.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail6.ll
    M llvm/test/Transforms/Coroutines/coro-split-musttail7.ll

  Log Message:
  -----------
  [Coroutines] Only do symmetric transfer if optimization is on

Symmetric transfer is not a part of C++ standards. So the vendors is not
forced to implement it any way. Given the symmetric transfer nowadays is
an optimization. It makes more sense to enable it only if the
optimization is enabled. It is also helpful for the compilation speed in
O0.