[all-commits] [llvm/llvm-project] c5e687: [Attributor] Guarantee getAAFor not to update AA i...

[Shinji Okumura via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c5e6872ec6e5269a6d92098765eec266ed4ce4ae
      https://github.com/llvm/llvm-project/commit/c5e6872ec6e5269a6d92098765eec266ed4ce4ae
  Author: Shinji Okumura <okuraofvegetable at gmail.com>
  Date:   2020-08-28 (Fri, 28 Aug 2020)

  Changed paths:
    M llvm/include/llvm/Transforms/IPO/Attributor.h
    M llvm/lib/Transforms/IPO/Attributor.cpp

  Log Message:
  -----------
  [Attributor] Guarantee getAAFor not to update AA in the manifestation stage

If we query an AA with `Attributor::getAAFor` in `AbstractAttribute::manifest`, the AA may be updated.
This patch makes use of the phase flag in Attributor, and handle `getAAFor` behavior according to the flag.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D86635