[all-commits] [llvm/llvm-project] e0442b: [Clang] Fix segmentation fault caused by `VarBypas...

[Boaz Brickner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e0442bdfa5a5cd02431955cb18b67194d2b82faf
      https://github.com/llvm/llvm-project/commit/e0442bdfa5a5cd02431955cb18b67194d2b82faf
  Author: Boaz Brickner <brickner at google.com>
  Date:   2025-03-10 (Mon, 10 Mar 2025)

  Changed paths:
    M clang/lib/CodeGen/CodeGenFunction.cpp
    M clang/lib/CodeGen/VarBypassDetector.cpp
    M clang/lib/CodeGen/VarBypassDetector.h

  Log Message:
  -----------
  [Clang] Fix segmentation fault caused by `VarBypassDetector` stack overflow on deeply nested expressions (#124128)

This happens when using `-O2`.

Similarly to #111701
([test](https://github.com/bricknerb/llvm-project/blob/93e4a7386ec897e53d7330c6206d38759a858be2/clang/test/CodeGen/deeply-nested-expressions.cpp)),
not adding a test that reproduces since this test is slow and likely to
be hard to maintained as discussed here and in [previous
discussion](https://github.com/llvm/llvm-project/pull/111701/files/1a63281b6c240352653fd2e4299755c1f32a76f4#r1795518779).
Test that was reverted here:
https://github.com/llvm/llvm-project/pull/124128/commits/d6b5576940d38aadb3293acbff680d1f5d22486c



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