[all-commits] [llvm/llvm-project] ad30f6: [NFC] Fix use-after-free: track TargetLibraryAnaly...

[Daniel Paoliello via All-commits]

  Branch: refs/heads/release/22.x
  Home:   https://github.com/llvm/llvm-project
  Commit: ad30f6e88e654a5919984a74b1e6152df4d761be
      https://github.com/llvm/llvm-project/commit/ad30f6e88e654a5919984a74b1e6152df4d761be
  Author: Daniel Paoliello <danpao at microsoft.com>
  Date:   2026-03-05 (Thu, 05 Mar 2026)

  Changed paths:
    M llvm/lib/Analysis/BasicAliasAnalysis.cpp

  Log Message:
  -----------
  [NFC] Fix use-after-free: track TargetLibraryAnalysis in BasicAAResult invalidation (#183852)

`BasicAAResult` holds a reference to `TargetLibraryInfo` but its
`invalidate()` function did not check `TargetLibraryAnalysis`. When the
pass manager destroyed and re-created `TLI` (e.g. during `CGSCC`
invalidation or `FAM.clear()`), `BasicAAResult` survived with a dangling
`TLI` reference.

This was exposed by #157495 which added `aliasErrno()`, the first code
path that dereferences `TLI` from `BasicAAResult` during the `CGSCC`
pipeline, causing a AV when compiling Rust's core library on Arm64
Windows.

This change adds `TargetLibraryAnalysis` to the invalidation check so
`BasicAAResult` is properly invalidated when its `TLI` reference becomes
stale.

(cherry picked from commit 788625757ea4a7de562461dfea9b7a59b050ec91)



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