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Add copyMD to copy metadata from one instruction to another instruction. 

llvm-svn: 84113
This commit is contained in:
Devang Patel 2009-10-14 17:02:49 +00:00
parent 4aa2dc41dc
commit ebaa76ed0d
2 changed files with 19 additions and 0 deletions
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4
llvm/include/llvm/Metadata.h
View File

@ -351,6 +351,10 @@ public:
/// removeMDs - Remove all metadata attached with an instruction.
void removeMDs(const Instruction *Inst);
/// copyMD - If metadata is attached with Instruction In1 then attach
/// the same metadata to In2.
void copyMD(Instruction *In1, Instruction *In2);
/// getHandlerNames - Get handler names. This is used by bitcode
/// writer.
const StringMap<unsigned> *getHandlerNames();

15
llvm/lib/VMCore/Metadata.cpp
View File

@ -359,6 +359,20 @@ void MetadataContext::removeMDs(const Instruction *Inst) {
MetadataStore.erase(I);
}
/// copyMD - If metadata is attached with Instruction In1 then attach
/// the same metadata to In2.
void MetadataContext::copyMD(Instruction *In1, Instruction *In2) {
assert (In1 && In2 && "Invalid instruction!");
MDStoreTy::iterator I = MetadataStore.find(In1);
if (I == MetadataStore.end())
return;
MDMapTy &In1Info = I->second;
MDMapTy In2Info;
for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
if (MDNode *MD = dyn_cast_or_null<MDNode>(I->second))
addMD(I->first, MD, In2);
}
/// getMD - Get the metadata of given kind attached with an Instruction.
/// If the metadata is not found then return 0.
@ -416,3 +430,4 @@ void MetadataContext::ValueIsRAUWd(Value *V1, Value *V2) {
// FIXME : Give custom handlers a chance to override this.
ValueIsCloned(I1, I2);
}