[all-commits] [llvm/llvm-project] 5f3c99: [ValueTracking] Dereferenced pointers are noundef

[Juneyoung Lee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5f3c99085d4c2ebf57fd0586b013b02e32a8e20b
      https://github.com/llvm/llvm-project/commit/5f3c99085d4c2ebf57fd0586b013b02e32a8e20b
  Author: aqjune <aqjune at gmail.com>
  Date:   2021-02-14 (Sun, 14 Feb 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/ValueTracking.h
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/test/Transforms/Attributor/ArgumentPromotion/2008-07-02-array-indexing.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/X86/attributes.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/X86/min-legal-vector-width.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/attrs.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/byval-2.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/dbg.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/tail.ll
    M llvm/test/Transforms/Attributor/align.ll
    M llvm/test/Transforms/Attributor/callbacks.ll
    M llvm/test/Transforms/Attributor/chain.ll
    M llvm/test/Transforms/Attributor/depgraph.ll
    M llvm/test/Transforms/Attributor/dereferenceable-1.ll
    M llvm/test/Transforms/Attributor/dereferenceable-2-inseltpoison.ll
    M llvm/test/Transforms/Attributor/dereferenceable-2.ll
    M llvm/test/Transforms/Attributor/heap_to_stack.ll
    M llvm/test/Transforms/Attributor/internal-noalias.ll
    M llvm/test/Transforms/Attributor/liveness.ll
    M llvm/test/Transforms/Attributor/memory_locations.ll
    M llvm/test/Transforms/Attributor/misc.ll
    M llvm/test/Transforms/Attributor/misc_crash.ll
    M llvm/test/Transforms/Attributor/noalias.ll
    M llvm/test/Transforms/Attributor/nocapture-1.ll
    M llvm/test/Transforms/Attributor/nocapture-2.ll
    M llvm/test/Transforms/Attributor/nofree.ll
    M llvm/test/Transforms/Attributor/nonnull.ll
    M llvm/test/Transforms/Attributor/norecurse.ll
    M llvm/test/Transforms/Attributor/nosync.ll
    M llvm/test/Transforms/Attributor/range.ll
    M llvm/test/Transforms/Attributor/read_write_returned_arguments_scc.ll
    M llvm/test/Transforms/Attributor/readattrs.ll
    M llvm/test/Transforms/Attributor/undefined_behavior.ll
    M llvm/test/Transforms/Attributor/value-simplify.ll
    M llvm/test/Transforms/InstSimplify/freeze.ll
    M llvm/test/Transforms/OpenMP/parallel_deletion.ll

  Log Message:
  -----------
  [ValueTracking] Dereferenced pointers are noundef

This is a follow-up of D95238's LangRef update.
This patch updates `programUndefinedIfUndefOrPoison(V)` to return true if
`V` is used by any memory-accessing instruction.
Interestingly, this affected many tests in Attributors, mainly about adding noundefs.
The tests are updated using llvm/utils/update_test_checks.py. I checked that the diffs
are about updating noundefs.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D96642