[LLVM-C] Add Bindings For Named Metadata

Summary: Add a new type for named metadata nodes.  Use this to implement iterators and accessors for NamedMDNodes and extend the echo test to use them to copy module-level debug information.

Reviewers: whitequark, deadalnix, aprantl, dexonsmith

Reviewed By: whitequark

Subscribers: Wallbraker, JDevlieghere, llvm-commits, harlanhaskins

Differential Revision: https://reviews.llvm.org/D47179

llvm-svn: 341085

1 files changed, 48 insertions, 0 deletions

diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index bea4dee15c1..617d1c1cce3 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -1065,6 +1065,54 @@ unsigned LLVMGetMDNodeNumOperands(LLVMValueRef V) {
   return cast<MDNode>(MD->getMetadata())->getNumOperands();
 }
 
+LLVMNamedMDNodeRef LLVMGetFirstNamedMetadata(LLVMModuleRef M) {
+  Module *Mod = unwrap(M);
+  Module::named_metadata_iterator I = Mod->named_metadata_begin();
+  if (I == Mod->named_metadata_end())
+    return nullptr;
+  return wrap(&*I);
+}
+
+LLVMNamedMDNodeRef LLVMGetLastNamedMetadata(LLVMModuleRef M) {
+  Module *Mod = unwrap(M);
+  Module::named_metadata_iterator I = Mod->named_metadata_end();
+  if (I == Mod->named_metadata_begin())
+    return nullptr;
+  return wrap(&*--I);
+}
+
+LLVMNamedMDNodeRef LLVMGetNextNamedMetadata(LLVMNamedMDNodeRef NMD) {
+  NamedMDNode *NamedNode = unwrap<NamedMDNode>(NMD);
+  Module::named_metadata_iterator I(NamedNode);
+  if (++I == NamedNode->getParent()->named_metadata_end())
+    return nullptr;
+  return wrap(&*I);
+}
+
+LLVMNamedMDNodeRef LLVMGetPreviousNamedMetadata(LLVMNamedMDNodeRef NMD) {
+  NamedMDNode *NamedNode = unwrap<NamedMDNode>(NMD);
+  Module::named_metadata_iterator I(NamedNode);
+  if (I == NamedNode->getParent()->named_metadata_begin())
+    return nullptr;
+  return wrap(&*--I);
+}
+
+LLVMNamedMDNodeRef LLVMGetNamedMetadata(LLVMModuleRef M,
+                                        const char *Name, size_t NameLen) {
+  return wrap(unwrap(M)->getNamedMetadata(StringRef(Name, NameLen)));
+}
+
+LLVMNamedMDNodeRef LLVMGetOrInsertNamedMetadata(LLVMModuleRef M,
+                                                const char *Name, size_t NameLen) {
+  return wrap(unwrap(M)->getOrInsertNamedMetadata({Name, NameLen}));
+}
+
+const char *LLVMGetNamedMetadataName(LLVMNamedMDNodeRef NMD, size_t *NameLen) {
+  NamedMDNode *NamedNode = unwrap<NamedMDNode>(NMD);
+  *NameLen = NamedNode->getName().size();
+  return NamedNode->getName().data();
+}
+
 void LLVMGetMDNodeOperands(LLVMValueRef V, LLVMValueRef *Dest) {
   auto *MD = cast<MetadataAsValue>(unwrap(V));
   if (auto *MDV = dyn_cast<ValueAsMetadata>(MD->getMetadata())) {