Revert "IR: MDNode => Value"

Instead, we're going to separate metadata from the Value hierarchy.  See
PR21532.

This reverts commit r221375.
This reverts commit r221373.
This reverts commit r221359.
This reverts commit r221167.
This reverts commit r221027.
This reverts commit r221024.
This reverts commit r221023.
This reverts commit r220995.
This reverts commit r220994.

llvm-svn: 221711

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 9523446bd22..4acd7271be9 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -450,8 +450,8 @@ void DwarfDebug::beginModule() {
 
   SingleCU = CU_Nodes->getNumOperands() == 1;
 
-  for (Value *N : CU_Nodes->operands()) {
-    DICompileUnit CUNode(cast<MDNode>(N));
+  for (MDNode *N : CU_Nodes->operands()) {
+    DICompileUnit CUNode(N);
     DwarfCompileUnit &CU = constructDwarfCompileUnit(CUNode);
     DIArray ImportedEntities = CUNode.getImportedEntities();
     for (unsigned i = 0, e = ImportedEntities.getNumElements(); i != e; ++i)
@@ -526,8 +526,8 @@ void DwarfDebug::collectDeadVariables() {
   const Module *M = MMI->getModule();
 
   if (NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu")) {
-    for (Value *N : CU_Nodes->operands()) {
-      DICompileUnit TheCU(cast<MDNode>(N));
+    for (MDNode *N : CU_Nodes->operands()) {
+      DICompileUnit TheCU(N);
       // Construct subprogram DIE and add variables DIEs.
       DwarfCompileUnit *SPCU =
           static_cast<DwarfCompileUnit *>(CUMap.lookup(TheCU));