[all-commits] [llvm/llvm-project] ad2339: [BOLT] Extend Inliner to work on functions with Po...

[Gergely Bálint via All-commits]

  Branch: refs/heads/users/bgergely0/bolt-inliner-pauth
  Home:   https://github.com/llvm/llvm-project
  Commit: ad23391cd09a731cd89f51640dde2d8261854f67
      https://github.com/llvm/llvm-project/commit/ad23391cd09a731cd89f51640dde2d8261854f67
  Author: Gergely Balint <gergely.balint at arm.com>
  Date:   2025-10-20 (Mon, 20 Oct 2025)

  Changed paths:
    M bolt/include/bolt/Core/MCPlusBuilder.h
    M bolt/lib/Passes/Inliner.cpp
    M bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp
    A bolt/test/AArch64/inline-armv8.3-returns.s

  Log Message:
  -----------
  [BOLT] Extend Inliner to work on functions with Pointer Autentication

The inliner uses DirectSP to check if a function has instructions that
modify the SP. Exceptions are stack Push and Pop instructions.

We can also allow pointer signing and authentication instructions.

The inliner removes the Return instructions from the inlined functions.
If it is a fused pointer-authentication-and-return (e.g. RETAA), we have
to generate a new authentication instruction in place of the Return.



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