Duncan P. N. Exon Smith f9fa1559e5 Linker: Remove IRMover::isMetadataUnneeded indirection; almost NFC ...

Instead of checking live during MapMetadata whether a subprogram is
needed, seed the ValueMap with `nullptr` up-front.

There is a small hypothetical functionality change.  Previously, calling
MapMetadataOp on a node whose "scope:" chain led to an unneeded
subprogram would return nullptr.  However, if that were ever called,
then the subprogram would be needed; a situation that the IRMover is
supposed to avoid a priori!

Besides cleaning up the code a little, this restores a nice property:
MapMetadataOp returns the same as MapMetadata.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265229 91177308-0d34-0410-b5e6-96231b3b80d8

2016-04-02 17:12:00 +00:00

..

CMakeLists.txt

Slit lib/Linker in two.

2015-12-10 14:19:35 +00:00

IRMover.cpp

Linker: Remove IRMover::isMetadataUnneeded indirection; almost NFC

2016-04-02 17:12:00 +00:00

LinkDiagnosticInfo.h

Slit lib/Linker in two.

2015-12-10 14:19:35 +00:00

LinkModules.cpp

[ThinLTO] Remove post-pass metadata linking support

2016-03-29 18:24:19 +00:00

LLVMBuild.txt

[Linker] Kill Linker::LoadObject which is dead, and drop the BitReader dependency again.

2013-01-18 19:37:11 +00:00