[all-commits] [llvm/llvm-project] c579a5: [COFF] Don't treat DWARF sections as GC roots

[Reid Kleckner via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c579a5b1d92a9bc2046d00ee2d427832e0f5ddec
      https://github.com/llvm/llvm-project/commit/c579a5b1d92a9bc2046d00ee2d427832e0f5ddec
  Author: Reid Kleckner <rnk at google.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M lld/COFF/MarkLive.cpp
    A lld/test/COFF/gc-dwarf.s

  Log Message:
  -----------
  [COFF] Don't treat DWARF sections as GC roots

DWARF sections are typically live and not COMDAT, so they would be
treated as GC roots. Enabling DWARF would essentially keep all code with
debug info alive, preventing any section GC.

Fixes PR45273

Reviewed By: mstorsjo, MaskRay

Differential Revision: https://reviews.llvm.org/D76935