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Justin Lebar c05f3c9942 [IR] [DAE] Copy comdats during DAE, and don't copy comdats in GlobalObject::copyAttributesFrom. 
Summary: This reverts the changes to Globals.cpp and IRMover.cpp in
"[IR] Copy comdats in GlobalObject::copyAttributesFrom" (D20631,
rL270743).

The DeadArgElim test is left unchanged, and we change DAE to explicitly
copy comdats.

The reverted change breaks copyAttributesFrom when the destination lives
in a different module from the source.  The decision in D21255 was to
revert this patch and handle comdat copying separately from
copyAttributesFrom.

Reviewers: majnemer, rnk

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21403

llvm-svn: 272855
 		2016-06-15 23:20:15 +00:00
..
CMakeLists.txt Slit lib/Linker in two. 2015-12-10 14:19:35 +00:00
IRMover.cpp [IR] [DAE] Copy comdats during DAE, and don't copy comdats in GlobalObject::copyAttributesFrom. 2016-06-15 23:20:15 +00:00
LLVMBuild.txt
…
LinkDiagnosticInfo.h Slit lib/Linker in two. 2015-12-10 14:19:35 +00:00
LinkModules.cpp IR: Introduce local_unnamed_addr attribute. 2016-06-14 21:01:22 +00:00