[PATCH] D116330: [Coroutines] Handle lifetime markers, bitcast and unused instruciton for symmetric transfer

[Chuanqi Xu via Phabricator via llvm-commits]

ChuanqiXu created this revision.
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This fixes bug49888. The root cause for this is that `simplifyTerminatorLeadingToRet` didn't handle lifetime markers well. Another issue also noted in D116327 <https://reviews.llvm.org/D116327> is that we deleted some inlined optimization pass in CoroSplit so that  `simplifyTerminatorLeadingToRet` need to remove dead instructions by hand.

This patch fixes bug49888 by skipping lifetime markers and bitcast instruction and removing dead instructions by hand in `simplifyTerminatorLeadingToRet`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116330

Files:
  llvm/lib/Transforms/Coroutines/CoroSplit.cpp
  llvm/test/Transforms/Coroutines/coro-split-musttail5.ll
  llvm/test/Transforms/Coroutines/coro-split-musttail6.ll
  llvm/test/Transforms/Coroutines/coro-split-musttail7.ll

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