[all-commits] [llvm/llvm-project] 3282be: [BOLT] Use ULEB128 encoding for PIE/DSO exception ...

[Maksim Panchenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3282be1f8d278836135cc1bda130abb031155701
      https://github.com/llvm/llvm-project/commit/3282be1f8d278836135cc1bda130abb031155701
  Author: Maksim Panchenko <maks at fb.com>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    M bolt/lib/Core/BinaryEmitter.cpp

  Log Message:
  -----------
  [BOLT] Use ULEB128 encoding for PIE/DSO exception tables (#116911)

Use ULEB128 encoding for call sites in PIE/DSO binaries. The encoding
reduces the size of the tables compared to sdata4 and is the default
format used by Clang.

Note that for fixed-address executables we still use absolute addressing
to cover cases where landing pads can reside in different function
fragments.

For testing, we rely on runtime EH tests.



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