[PATCH] D53990: [MC] Support labels as offsets in .reloc directive

[Vladimir Stefanovic via Phabricator via llvm-commits]

vstefanovic created this revision.
vstefanovic added reviewers: atanasyan, majnemer.
Herald added subscribers: llvm-commits, jrtc27, arichardson, sdardis.

Currently, expressions like

  .reloc 1f, R_MIPS_JALR, foo

1: nop

are not allowed, ie. an offset in .reloc can only be absolute value.
This patch adds support for labels as offsets.
If offset is a forward declared label, MCObjectStreamer keeps the fixup locally
and adds it to the fixups vector after the label (and its offset) is defined.
For now, up to one pending fixup is allowed, and label+number is not supported
yet.


Repository:
  rL LLVM

https://reviews.llvm.org/D53990

Files:
  include/llvm/MC/MCObjectStreamer.h
  lib/MC/MCObjectStreamer.cpp
  lib/MC/MCParser/AsmParser.cpp
  test/MC/Mips/reloc-directive-bad-obj.s
  test/MC/Mips/reloc-directive-bad.s
  test/MC/Mips/reloc-directive-label-offset.s
  test/MC/Mips/reloc-directive-negative.s

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