[all-commits] [llvm/llvm-project] edbe96: [COFF] Don't treat DWARF sections as GC roots

[Reid Kleckner via All-commits]

  Branch: refs/heads/release/10.x
  Home:   https://github.com/llvm/llvm-project
  Commit: edbe962459da6e3b7b4168118f93a77847b54e02
      https://github.com/llvm/llvm-project/commit/edbe962459da6e3b7b4168118f93a77847b54e02
  Author: Reid Kleckner <rnk at google.com>
  Date:   2020-04-13 (Mon, 13 Apr 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

(cherry picked from commit c579a5b1d92a9bc2046d00ee2d427832e0f5ddec)