[all-commits] [llvm/llvm-project] 1a7464: [Attributor] Make IntegerState more flexible

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1a74645a70b38b48ff93251f7e7e51b2ab2ab403
      https://github.com/llvm/llvm-project/commit/1a74645a70b38b48ff93251f7e7e51b2ab2ab403
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2019-10-28 (Mon, 28 Oct 2019)

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

  Log Message:
  -----------
  [Attributor] Make IntegerState more flexible

To make IntegerState more flexible but also less error prone we split it
up into (1) incrementing, (2) decrementing, and (3) bit-tracking states.
This adds functionality compared to before and disallows misuse, e.g.,
"incrementing" updates on a bit-tracking state.

Part of the change is a single operator in the base class which
simplifies helper functions that deal with states.

There are certain functional changes but all of which should actually be
corrections.