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Link NamedMDNodes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78696 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-08-11 18:01:24 +00:00
parent e2574d3215
commit ab67e705f5
5 changed files with 42 additions and 0 deletions
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2
include/llvm/Metadata.h
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@ -229,6 +229,8 @@ public:
return new NamedMDNode(N, MDs, NumMDs, M);
}
static NamedMDNode *Create(const NamedMDNode *NMD, Module *M = 0);
/// eraseFromParent - Drop all references and remove the node from parent
/// module.
void eraseFromParent();

19
lib/Linker/LinkModules.cpp
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@ -538,6 +538,22 @@ static bool GetLinkageResult(GlobalValue *Dest, const GlobalValue *Src,
return false;
}
// Insert all of the named mdnoes in Src into the Dest module.
static void LinkNamedMDNodes(Module *Dest, Module *Src) {
for (Module::const_named_metadata_iterator I = Src->named_metadata_begin(),
E = Src->named_metadata_end(); I != E; ++I) {
const NamedMDNode *SrcNMD = I;
NamedMDNode *DestNMD = Dest->getNamedMetadata(SrcNMD->getName());
if (!DestNMD)
NamedMDNode::Create(SrcNMD, Dest);
else {
// Add Src elements into Dest node.
for (unsigned i = 0, e = SrcNMD->getNumElements(); i != e; ++i)
DestNMD->addElement(SrcNMD->getElement(i));
}
}
}
// LinkGlobals - Loop through the global variables in the src module and merge
// them into the dest module.
static bool LinkGlobals(Module *Dest, const Module *Src,
@ -1307,6 +1323,9 @@ Linker::LinkModules(Module *Dest, Module *Src, std::string *ErrorMsg) {
AppendingVars.insert(std::make_pair(I->getName(), I));
}
// Insert all of the named mdnoes in Src into the Dest module.
LinkNamedMDNodes(Dest, Src);
// Insert all of the globals in src into the Dest module... without linking
// initializers (which could refer to functions not yet mapped over).
if (LinkGlobals(Dest, Src, ValueMap, AppendingVars, ErrorMsg))

9
lib/VMCore/Metadata.cpp
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@ -104,6 +104,7 @@ MDNode::~MDNode() {
dropAllReferences();
getType()->getContext().pImpl->MDNodes.remove(this);
}
//===----------------------------------------------------------------------===//
//NamedMDNode implementation
//
@ -123,6 +124,14 @@ NamedMDNode::NamedMDNode(const Twine &N, MetadataBase*const* MDs,
ParentModule->getNamedMDList().push_back(this);
}
NamedMDNode *NamedMDNode::Create(const NamedMDNode *NMD, Module *M) {
assert (NMD && "Invalid source NamedMDNode!");
SmallVector<MetadataBase *, 4> Elems;
for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i)
Elems.push_back(NMD->getElement(i));
return new NamedMDNode(NMD->getName().data(), Elems.data(), Elems.size(), M);
}
/// eraseFromParent - Drop all references and remove the node from parent
/// module.
void NamedMDNode::eraseFromParent() {

6
test/Linker/linknamedmdnode.ll Normal file
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@ -0,0 +1,6 @@
; RUN: llvm-as < %s > %t.bc
; RUN: llvm-as < %p/linknamedmdnode2.ll > %t2.bc
; RUN: llvm-link %t.bc %t2.bc | llvm-dis | grep "!llvm.stuff = !{!0, !1}"
!0 = metadata !{i32 42}
!llvm.stuff = !{!0}

6
test/Linker/linknamedmdnode2.ll Normal file
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@ -0,0 +1,6 @@
; This file is used by linknamedmdnode.ll, so it doesn't actually do anything itself
;
; RUN: true
!0 = metadata !{i32 41}
!llvm.stuff = !{!0}