[llvm] 05e8d9f - [AsmWriter] Add emitMDNodeAnnot (#198317)

[via llvm-commits]

Author: Harald van Dijk
Date: 2026-06-03T15:55:52+01:00
New Revision: 05e8d9f86a1d29e32d92a04ff9f0371f25057f33

URL: https://github.com/llvm/llvm-project/commit/05e8d9f86a1d29e32d92a04ff9f0371f25057f33
DIFF: https://github.com/llvm/llvm-project/commit/05e8d9f86a1d29e32d92a04ff9f0371f25057f33.diff

LOG: [AsmWriter] Add emitMDNodeAnnot (#198317)

Similarly to the other AAW::emit*Annot functions, this may be used to
emit a comment before a metadata node.

Added: 
    

Modified: 
    llvm/include/llvm/IR/AssemblyAnnotationWriter.h
    llvm/lib/IR/AsmWriter.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/IR/AssemblyAnnotationWriter.h b/llvm/include/llvm/IR/AssemblyAnnotationWriter.h
index d68bcbf85b2b7..bcc5244c0b93e 100644
--- a/llvm/include/llvm/IR/AssemblyAnnotationWriter.h
+++ b/llvm/include/llvm/IR/AssemblyAnnotationWriter.h
@@ -23,6 +23,7 @@ namespace llvm {
 class Function;
 class BasicBlock;
 class Instruction;
+class MDNode;
 class Value;
 class formatted_raw_ostream;
 
@@ -53,6 +54,10 @@ class LLVM_ABI AssemblyAnnotationWriter {
   virtual void emitInstructionAnnot(const Instruction *,
                                     formatted_raw_ostream &) {}
 
+  /// emitMDNodeAnnot - This may be implemented to emit a string right before a
+  /// metadata node is emitted.
+  virtual void emitMDNodeAnnot(const MDNode *, formatted_raw_ostream &) {}
+
   /// printInfoComment - This may be implemented to emit a comment to the
   /// right of an instruction or global value.
   virtual void printInfoComment(const Value &, formatted_raw_ostream &) {}

diff  --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index b0727cae346f0..52ed28f71f615 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -4980,6 +4980,9 @@ void AssemblyWriter::printMetadataAttachments(
 }
 
 void AssemblyWriter::writeMDNode(unsigned Slot, const MDNode *Node) {
+  if (AnnotationWriter)
+    AnnotationWriter->emitMDNodeAnnot(Node, Out);
+
   Out << '!' << Slot << " = ";
   printMDNodeBody(Node);
   Out << "\n";