[all-commits] [llvm/llvm-project] 648544: [Constant] ConstantStruct/Array should not lower p...

[Juneyoung Lee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 648544f998cd0811670a625f4f2964125cf833b3
      https://github.com/llvm/llvm-project/commit/648544f998cd0811670a625f4f2964125cf833b3
  Author: Juneyoung Lee <aqjune at gmail.com>
  Date:   2021-04-08 (Thu, 08 Apr 2021)

  Changed paths:
    M llvm/lib/IR/Constants.cpp
    M llvm/unittests/IR/ConstantsTest.cpp

  Log Message:
  -----------
  [Constant] ConstantStruct/Array should not lower poison to undef

This is a (late) follow-up patch of 8871a4b4cab8a56fd6ff12fd024002c3c79128b3 and
c95f39891a282ebf36199c73b705d4a2c78a46ce to make ConstantStruct::get/ConstantArray::getImpl
correctly return PoisonValue if all elements are poison.
This was found while discussing about the elements of a vector-typed UndefValue (D99853)