[all-commits] [llvm/llvm-project] 30611c: [BOLT] Fix RELR addend updates for non-zero image ...

[Adam Bzowski via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 30611cae030a654be821dfc817126568ac6d2baa
      https://github.com/llvm/llvm-project/commit/30611cae030a654be821dfc817126568ac6d2baa
  Author: Adam Bzowski <adam.bzowski at arm.com>
  Date:   2026-07-30 (Thu, 30 Jul 2026)

  Changed paths:
    M bolt/lib/Rewrite/RewriteInstance.cpp
    M bolt/test/AArch64/constant_island_pie_update.s

  Log Message:
  -----------
  [BOLT] Fix RELR addend updates for non-zero image bases (#213000)

This patch fixes an AArch64 BOLT failure exposed by LLVM commit
`fbba327208d7f6994f9a28a51dca3e913e3b444a`, which enabled packed
relative relocations (RELR) globally. BOLT incorrectly used a virtual
relocation address as a file offset when updating RELR addends,
corrupting instrumented executables when their image base was non-zero.
The observed CMake compiler-check failure was only a consequence of the
corrupted BOLT-instrumented Clang executable crashing; the defect itself
is in BOLT, not CMake.

The regression test links an AArch64 PIE with a non-zero image base and
verifies that BOLT updates the RELR addend at the correct file offset.

Assisted-by: Codex



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