IR: MDNode => Value: NamedMDNode::getOperator()

Change `NamedMDNode::getOperator()` from returning `MDNode *` to
returning `Value *`.  To reduce boilerplate at some call sites, add a
`getOperatorAsMDNode()` for named metadata that's expected to only
return `MDNode` -- for now, that's everything, but debug node named
metadata (such as llvm.dbg.cu and llvm.dbg.sp) will soon change.  This
is part of PR21433.

Note that there's a follow-up patch to clang for the API change.

llvm-svn: 221375

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Linker/LinkModules.cpp b/llvm/lib/Linker/LinkModules.cpp
index bac187bb3a3..3a2eb6c178c 100644
--- a/llvm/lib/Linker/LinkModules.cpp
+++ b/llvm/lib/Linker/LinkModules.cpp
@@ -1287,7 +1287,7 @@ bool ModuleLinker::linkModuleFlagsMetadata() {
   DenseMap<MDString*, MDNode*> Flags;
   SmallSetVector<MDNode*, 16> Requirements;
   for (unsigned I = 0, E = DstModFlags->getNumOperands(); I != E; ++I) {
-    MDNode *Op = DstModFlags->getOperand(I);
+    MDNode *Op = DstModFlags->getOperandAsMDNode(I);
     ConstantInt *Behavior = cast<ConstantInt>(Op->getOperand(0));
     MDString *ID = cast<MDString>(Op->getOperand(1));
 
@@ -1302,7 +1302,7 @@ bool ModuleLinker::linkModuleFlagsMetadata() {
   // requirements.
   bool HasErr = false;
   for (unsigned I = 0, E = SrcModFlags->getNumOperands(); I != E; ++I) {
-    MDNode *SrcOp = SrcModFlags->getOperand(I);
+    MDNode *SrcOp = SrcModFlags->getOperandAsMDNode(I);
     ConstantInt *SrcBehavior = cast<ConstantInt>(SrcOp->getOperand(0));
     MDString *ID = cast<MDString>(SrcOp->getOperand(1));
     MDNode *DstOp = Flags.lookup(ID);