[all-commits] [llvm/llvm-project] f6c54c: [-Wunsafe-buffer-usage] Ignore array subscript on ...

[Ziqing Luo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f6c54cdbc4394cd32f0dde990f217ca8f534a136
      https://github.com/llvm/llvm-project/commit/f6c54cdbc4394cd32f0dde990f217ca8f534a136
  Author: ziqingluo-90 <ziqing at udel.edu>
  Date:   2022-12-16 (Fri, 16 Dec 2022)

  Changed paths:
    M clang/lib/Analysis/UnsafeBufferUsage.cpp
    M clang/test/SemaCXX/warn-unsafe-buffer-usage.cpp

  Log Message:
  -----------
  [-Wunsafe-buffer-usage] Ignore array subscript on literal zero

Unsafe Buffer Usage analysis only warns unsafe buffer accesses but not
pointer dereferences.  An array subscript on a literal zero is
equivalent to dereference a pointer thus we do not want to warn it.

Reviewed By: NoQ

Differential Revision: https://reviews.llvm.org/D138321