[all-commits] [llvm/llvm-project] ead0d7: [LangRef] make per-element poison behavior explicit

[RotateRight via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ead0d77409b888ad5b8df90ee3b8ab7639b241c7
      https://github.com/llvm/llvm-project/commit/ead0d77409b888ad5b8df90ee3b8ab7639b241c7
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2019-12-04 (Wed, 04 Dec 2019)

  Changed paths:
    M llvm/docs/LangRef.rst

  Log Message:
  -----------
  [LangRef] make per-element poison behavior explicit

As discussed in D70246 and PR43958:
https://bugs.llvm.org/show_bug.cgi?id=43958

The LangRef seems ambiguous about the behavior of poison with respect
to vectors.

We could go further with text and/or examples - suggestions welcome.

Also, see discussion on llvm-dev;
http://lists.llvm.org/pipermail/llvm-dev/2019-November/137243.html

Differential Revision: https://reviews.llvm.org/D70641