[all-commits] [llvm/llvm-project] 29f862: [Constant] Add containsPoisonElement

[Juneyoung Lee via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 29f8628d1fc8d96670e13562c4d92fc916bd0ce1
      https://github.com/llvm/llvm-project/commit/29f8628d1fc8d96670e13562c4d92fc916bd0ce1
  Author: Juneyoung Lee <aqjune at gmail.com>
  Date:   2021-01-06 (Wed, 06 Jan 2021)

  Changed paths:
    M llvm/include/llvm/IR/Constant.h
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/lib/IR/ConstantFold.cpp
    M llvm/lib/IR/Constants.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineNegator.cpp
    M llvm/unittests/Analysis/ValueTrackingTest.cpp
    M llvm/unittests/IR/ConstantsTest.cpp

  Log Message:
  -----------
  [Constant] Add containsPoisonElement

This patch

- Adds containsPoisonElement that checks existence of poison in constant vector elements,
- Renames containsUndefElement to containsUndefOrPoisonElement to clarify its behavior & updates its uses properly

With this patch, isGuaranteedNotToBeUndefOrPoison's tests w.r.t constant vectors are added because its analysis is improved.

Thanks!

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D94053