[all-commits] [llvm/llvm-project] 25ce1e: [ValueTracking] Add UndefOrPoison/Poison-only vers...

[Juneyoung Lee via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 25ce1e0497259711836f949005297125e92a6e93
      https://github.com/llvm/llvm-project/commit/25ce1e0497259711836f949005297125e92a6e93
  Author: Juneyoung Lee <aqjune at gmail.com>
  Date:   2020-09-09 (Wed, 09 Sep 2020)

  Changed paths:
    M llvm/include/llvm/Analysis/ValueTracking.h
    M llvm/lib/Analysis/ScalarEvolution.cpp
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/lib/Transforms/Instrumentation/PoisonChecking.cpp
    M llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
    M llvm/unittests/Analysis/ValueTrackingTest.cpp

  Log Message:
  -----------
  [ValueTracking] Add UndefOrPoison/Poison-only version of relevant functions

This patch adds isGuaranteedNotToBePoison and programUndefinedIfUndefOrPoison.

isGuaranteedNotToBePoison will be used at D75808. The latter function is used at isGuaranteedNotToBePoison.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D84242