tree 7185d9f9615e2ff9d7764d40942512dd1325a40a
parent ec08d99feee1ebbc5176d01e1c6cb021ade1eb37
author Teresa Johnson <tejohnson@google.com> 1450461097 +0000
committer Teresa Johnson <tejohnson@google.com> 1450461097 +0000

[ThinLTO/LTO] Don't link in unneeded metadata

Summary:
Third patch split out from http://reviews.llvm.org/D14752.

Only map in needed DISubroutine metadata (imported or otherwise linked
in functions and other DISubroutine referenced by inlined instructions).
This is supported for ThinLTO, LTO and llvm-link --only-needed, with
associated tests for each one.

Depends on D14838.

Reviewers: dexonsmith, joker.eph

Subscribers: davidxl, llvm-commits, joker.eph

Differential Revision: http://reviews.llvm.org/D14843

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256003 91177308-0d34-0410-b5e6-96231b3b80d8