[all-commits] [llvm/llvm-project] e38f01: [IROutliner] Accomodate blocks containing PHINodes...

[Andrew Litteken via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e38f014c40e94205925403fa75e48244ee31b6c0
      https://github.com/llvm/llvm-project/commit/e38f014c40e94205925403fa75e48244ee31b6c0
  Author: Andrew Litteken <andrew.litteken at gmail.com>
  Date:   2022-05-07 (Sat, 07 May 2022)

  Changed paths:
    M llvm/lib/Transforms/IPO/IROutliner.cpp
    A llvm/test/Transforms/IROutliner/no-external-block-entries.ll
    A llvm/test/Transforms/IROutliner/one-external-incoming-block-phi-node.ll

  Log Message:
  -----------
  [IROutliner] Accomodate blocks containing PHINodes with one entry outside the region and others inside the region.

When a PHINode has an incoming block from outside the region, it must be handled specially when assigning a global value number to each incoming value. A PHINode has multiple predecessors, and we must handle this case rather than only the single predecessor case.

Reviewer: paquette

Differential Revision: https://reviews.llvm.org/D124777