[PATCH] D71181: [ValueTracking] Allow context-sensitive nullness check for non-pointers

[Johannes Doerfert via Phabricator via llvm-commits]

jdoerfert created this revision.
jdoerfert added reviewers: nikic, nlopes, mkazantsev, spatel, dlrobertson, uabelho, hakzsam, hans.
Herald added subscribers: asbirlea, bollu, hiraditya.
Herald added a project: LLVM.

Same as D60846 <https://reviews.llvm.org/D60846> and D69571 <https://reviews.llvm.org/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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71181

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

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