[llvm] XCOFF associated metadata (PR #159096)

[Wael Yehia via llvm-commits]

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@@ -766,6 +766,30 @@ void Verifier::visitGlobalValue(const GlobalValue &GV) {
                               DL.getIntPtrType(GO->getType()),
                               RangeLikeMetadataKind::AbsoluteSymbol);
     }
+
+    if (GO->hasMetadata(LLVMContext::MD_ref)) {
+      SmallVector<MDNode *> MDs;
+      GO->getMetadata(LLVMContext::MD_ref, MDs);
+      for (const MDNode *MD : MDs) {
+        Check(MD->getNumOperands() == 1, "ref metadata must have one operand",
+              &GV, MD);
+        const Metadata *Op = MD->getOperand(0).get();
+        Check(Op, "ref metadata must have a global value", GO, MD);
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w2yehia wrote:

this check can be removed?

https://github.com/llvm/llvm-project/pull/159096