Reapply r112091 and r111922, support for metadata linking, with a

fix: add a flag to MapValue and friends which indicates whether
any module-level mappings are being made. In the common case of
inlining, no module-level mappings are needed, so MapValue doesn't
need to examine non-function-local metadata, which can be very
expensive in the case of a large module with really deep metadata
(e.g. a large C++ program compiled with -g).

This flag is a little awkward; perhaps eventually it can be moved
into the ClonedCodeInfo class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112190 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/Transforms/IPO/PartialSpecialization.cpp b/lib/Transforms/IPO/PartialSpecialization.cpp
index 17245c7acd..4a99a411ab 100644
--- a/lib/Transforms/IPO/PartialSpecialization.cpp
+++ b/lib/Transforms/IPO/PartialSpecialization.cpp
@@ -74,7 +74,8 @@ SpecializeFunction(Function* F,
     deleted[arg->getArgNo()] = arg;
   }
 
-  Function* NF = CloneFunction(F, replacements);
+  Function* NF = CloneFunction(F, replacements,
+                               /*ModuleLevelChanges=*/false);
   NF->setLinkage(GlobalValue::InternalLinkage);
   F->getParent()->getFunctionList().push_back(NF);