[all-commits] [llvm/llvm-project] c1bc79: [Coroutine] Remain alignment information when merg...

[Chuanqi Xu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1bc7981babcae20247650a4b8adab9c0c97890a
      https://github.com/llvm/llvm-project/commit/c1bc7981babcae20247650a4b8adab9c0c97890a
  Author: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
  Date:   2021-01-20 (Wed, 20 Jan 2021)

  Changed paths:
    M llvm/lib/Transforms/Coroutines/CoroFrame.cpp
    A llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-04.ll
    A llvm/test/Transforms/Coroutines/coro-frame-reuse-alloca-05.ll

  Log Message:
  -----------
  [Coroutine] Remain alignment information when merging frame variables

Summary: This is to address bug48712.
The solution in this patch is that when we want to merge two variable a
into the storage frame of variable b only if the alignment of a is
multiple of b.
There may be other strategies. But now I think they are hard to handle
and benefit little. Or we can implement them in the future.

Test-plan: check-llvm

Reviewers: jmorse, lxfind, junparser

Differential Revision: https://reviews.llvm.org/D94891