diff --git a/llvm/include/llvm/IR/InstrTypes.h b/llvm/include/llvm/IR/InstrTypes.h
--- a/llvm/include/llvm/IR/InstrTypes.h
+++ b/llvm/include/llvm/IR/InstrTypes.h
@@ -1553,7 +1553,11 @@
   }
 
   /// Determine whether the return value has the given attribute.
-  bool hasRetAttr(Attribute::AttrKind Kind) const;
+  bool hasRetAttr(Attribute::AttrKind Kind) const {
+    return hasRetAttrImpl(Kind);
+  }
+  /// Determine whether the return value has the given attribute.
+  bool hasRetAttr(StringRef Kind) const { return hasRetAttrImpl(Kind); }
 
   /// Determine whether the argument or parameter has the given attribute.
   bool paramHasAttr(unsigned ArgNo, Attribute::AttrKind Kind) const;
@@ -2232,6 +2236,18 @@
 
     return hasFnAttrOnCalledFunction(Kind);
   }
+
+  /// Determine whether the return value has the given attribute. Supports
+  /// Attribute::AttrKind and StringRef as \p AttrKind types.
+  template <typename AttrKind> bool hasRetAttrImpl(AttrKind Kind) const {
+    if (Attrs.hasAttribute(AttributeList::ReturnIndex, Kind))
+      return true;
+
+    // Look at the callee, if available.
+    if (const Function *F = getCalledFunction())
+      return F->getAttributes().hasAttribute(AttributeList::ReturnIndex, Kind);
+    return false;
+  }
 };
 
 template <>
diff --git a/llvm/lib/IR/Instructions.cpp b/llvm/lib/IR/Instructions.cpp
--- a/llvm/lib/IR/Instructions.cpp
+++ b/llvm/lib/IR/Instructions.cpp
@@ -322,16 +322,6 @@
   return nullptr;
 }
 
-bool CallBase::hasRetAttr(Attribute::AttrKind Kind) const {
-  if (Attrs.hasAttribute(AttributeList::ReturnIndex, Kind))
-    return true;
-
-  // Look at the callee, if available.
-  if (const Function *F = getCalledFunction())
-    return F->getAttributes().hasAttribute(AttributeList::ReturnIndex, Kind);
-  return false;
-}
-
 /// Determine whether the argument or parameter has the given attribute.
 bool CallBase::paramHasAttr(unsigned ArgNo, Attribute::AttrKind Kind) const {
   assert(ArgNo < getNumArgOperands() && "Param index out of bounds!");
diff --git a/llvm/unittests/IR/InstructionsTest.cpp b/llvm/unittests/IR/InstructionsTest.cpp
--- a/llvm/unittests/IR/InstructionsTest.cpp
+++ b/llvm/unittests/IR/InstructionsTest.cpp
@@ -94,6 +94,11 @@
     EXPECT_EQ(Call->getArgOperand(Idx)->getType(), Arg->getType());
     Idx++;
   }
+
+  Call->addAttribute(llvm::AttributeList::ReturnIndex,
+                     Attribute::get(Call->getContext(), "test-str-attr"));
+  EXPECT_TRUE(Call->hasRetAttr("test-str-attr"));
+  EXPECT_FALSE(Call->hasRetAttr("not-on-call"));
 }
 
 TEST_F(ModuleWithFunctionTest, InvokeInst) {