Vlad Tsyrklevich dc042ebfe5 [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.

I've also enabled EliminateAvailableExternally for all optimization
levels, I believe it being disabled for O1 was an oversight.

Reviewers: pcc, tejohnson

Reviewed By: tejohnson

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

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327041 91177308-0d34-0410-b5e6-96231b3b80d8

2018-03-08 18:48:03 +00:00

..

Inputs

[ThinLTO] Keep available_externally symbols live

2018-03-08 18:48:03 +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] Revert r325320: Import global variables

2018-03-02 23:40:08 +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

[ThinLTO] Keep available_externally symbols live

2018-03-08 18:48:03 +00:00