[all-commits] [llvm/llvm-project] a7d992: [ValueTracking] Allow context-sensitive nullness c...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: a7d992c0f2d235c67f04160405c5c5606408d4b1
      https://github.com/llvm/llvm-project/commit/a7d992c0f2d235c67f04160405c5c5606408d4b1
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2019-12-09 (Mon, 09 Dec 2019)

  Changed paths:
    M llvm/lib/Analysis/InstructionSimplify.cpp
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/test/Transforms/Attributor/nonnull.ll
    M llvm/test/Transforms/InstCombine/known-non-zero.ll
    M llvm/test/Transforms/InstSimplify/known-non-zero.ll
    M llvm/test/Transforms/LICM/hoist-mustexec.ll

  Log Message:
  -----------
  [ValueTracking] Allow context-sensitive nullness check for non-pointers

Summary:
Same as D60846 and D69571 but with a fix for the problem encountered
after them. Both times it was a missing context adjustment in the
handling of PHI nodes.

The reproducers created from the bugs that caused the old commits to be
reverted are included.

Reviewers: nikic, nlopes, mkazantsev, spatel, dlrobertson, uabelho, hakzsam, hans

Subscribers: hiraditya, bollu, asbirlea, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71181