Index: llvm/lib/IR/Core.cpp
===================================================================
--- llvm/lib/IR/Core.cpp
+++ llvm/lib/IR/Core.cpp
@@ -1096,6 +1096,14 @@
   return wrap(ConstantPointerNull::get(unwrap<PointerType>(Ty)));
 }
 
+LLVMBool LLVMIsUnknownProvenance(LLVMValueRef Val) {
+  return isa<UnknownProvenance>(unwrap(Val));
+}
+
+LLVMValueRef LLVMGetUnknownProvenance(LLVMTypeRef Ty) {
+  return wrap(UnknownProvenance::get(unwrap<PointerType>(Ty)));
+}
+
 /*--.. Operations on metadata nodes ........................................--*/
 
 LLVMMetadataRef LLVMMDStringInContext2(LLVMContextRef C, const char *Str,
Index: llvm/tools/llvm-c-test/echo.cpp
===================================================================
--- llvm/tools/llvm-c-test/echo.cpp
+++ llvm/tools/llvm-c-test/echo.cpp
@@ -347,6 +347,12 @@
     return LLVMGetUndef(TypeCloner(M).Clone(Cst));
   }
 
+  // Try unknown_provenance
+  if (LLVMIsUnknownProvenance(Cst)) {
+    check_value_kind(Cst, LLVMUnknownProvenanceValueKind);
+    return LLVMGetUnknownProvenance(TypeCloner(M).Clone(Cst));
+  }
+
   // Try poison
   if (LLVMIsPoison(Cst)) {
     check_value_kind(Cst, LLVMPoisonValueValueKind);