[all-commits] [llvm/llvm-project] d1a632: [C2y] Fix _Countof handling of VLAs (#141621)

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d1a6327b2b5d859c992599ac217aaa6d8b83a998
      https://github.com/llvm/llvm-project/commit/d1a6327b2b5d859c992599ac217aaa6d8b83a998
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-05-27 (Tue, 27 May 2025)

  Changed paths:
    M clang/lib/CodeGen/CGExprScalar.cpp
    M clang/test/C/C2y/n3369_3.c

  Log Message:
  -----------
  [C2y] Fix _Countof handling of VLAs (#141621)

It turns out that getVLASize() does not get you the size of a single
dimension of the VLA, it gets you the full count of all elements. This
caused _Countof to return invalid values on VLA ranks. Now switched to
using getVLAElements1D() instead, which only gets a single dimension.

Fixes #141409



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