Vlad Tsyrklevich 827eb4ae0f Reland r327041: [ThinLTO] Keep available_externally symbols live ...

Summary:
This change fixes PR36483. The bug was originally introduced by a change
that marked non-prevailing symbols dead. This broke LowerTypeTests
handling of available_externally functions, which are non-prevailing.
LowerTypeTests uses liveness information to avoid emitting thunks for
unused functions.

Marking available_externally functions dead is incorrect, the functions
are used though the function definitions are not. This change keeps them
live, and lets the EliminateAvailableExternally/GlobalDCE passes remove
them later instead.

(Reland with a suspected fix for a unit test failure I haven't been able
to reproduce locally)

Reviewers: pcc, tejohnson

Reviewed By: tejohnson

Subscribers: grimar, mehdi_amini, inglorion, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D43690

llvm-svn: 327360

2018-03-13 05:08:48 +00:00

..

Inputs

Reland r327041: [ThinLTO] Keep available_externally symbols live

2018-03-13 05:08:48 +00:00

adjustable_threshold.ll

Move summary creation out of llvm-as into opt

2016-04-12 21:35:18 +00:00

funcimport_alias.ll

Move summary creation out of llvm-as into opt

2016-04-12 21:35:18 +00:00

funcimport_debug.ll

[PR27284] Reverse the ownership between DICompileUnit and DISubprogram.

2016-04-15 15:57:41 +00:00

funcimport_var.ll

[LTO] Make processing of combined module more consistent

2017-12-16 02:10:00 +00:00

funcimport.ll

[ThinLTO] Recommit of import global variables

2018-03-12 10:30:50 +00:00

hotness_based_import2.ll

[ThinLTO] Ensure callees get hot threshold when first seen on cold path

2016-12-15 18:21:01 +00:00

hotness_based_import.ll

[thinlto] Don't decay threshold for hot callsites

2016-09-30 03:01:17 +00:00

inlineasm.ll

[llvm] Remove redundant --check-prefix=CHECK from tests

2016-10-24 18:57:55 +00:00

not-prevailing.ll

Reland r327041: [ThinLTO] Keep available_externally symbols live

2018-03-13 05:08:48 +00:00