[all-commits] [llvm/llvm-project] 1148f0: Fix PR45371: SeparateConstOffsetFromGEP clean up b...

[Jon Roelofs via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1148f004fa35f1b74942bb1f578763d9dd79aa4a
      https://github.com/llvm/llvm-project/commit/1148f004fa35f1b74942bb1f578763d9dd79aa4a
  Author: Jonathan Roelofs <jroelofs at jroelofs.com>
  Date:   2020-04-01 (Wed, 01 Apr 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SeparateConstOffsetFromGEP.cpp
    A llvm/test/Transforms/SeparateConstOffsetFromGEP/pr45371-find-either-reset.ll

  Log Message:
  -----------
  Fix PR45371: SeparateConstOffsetFromGEP clean up bookkeeping

find() was altering the UserChain, even in cases where it subsequently
discovered that the resulting constant was a 0. This confuses
rebuildWithoutConstOffset() when it attempts to walk the chain later, since it
is expected that the chain itself be a path down the use-def edges of an
expression.