[all-commits] [llvm/llvm-project] d4ec33: [lld-macho][nfc] Refactor to accommodate paired re...

[Greg McGary via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d4ec3346b1baf31819d20a8950ced8be8f66a408
      https://github.com/llvm/llvm-project/commit/d4ec3346b1baf31819d20a8950ced8be8f66a408
  Author: Greg McGary <gkm at fb.com>
  Date:   2020-12-17 (Thu, 17 Dec 2020)

  Changed paths:
    M lld/MachO/Arch/X86_64.cpp
    M lld/MachO/InputFiles.cpp
    M lld/MachO/Target.h

  Log Message:
  -----------
  [lld-macho][nfc] Refactor to accommodate paired relocs

This is a refactor to pave the way for supporting paired-ADDEND for ARM64. The only paired reloc type for X86_64 is SUBTRACTOR. In a later diff, I will add SUBTRACTOR for both X86_64 and ARM64.

* s/`getImplicitAddend`/`getAddend`/ because it handles all forms of addend: implicit, explicit, paired.
* add predicate `bool isPairedReloc()`
* check range of `relInfo.r_symbolnum` is internal, unrelated to user-input, so use `assert()`, not `error()`
* minor cleanups & rearrangements in `InputFile::parseRelocations()`

Differential Revision: https://reviews.llvm.org/D90614