Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -3656,7 +3656,11 @@
                                      Fn);
   } else {
     // Use llvm function name.
-    Name = Fn->getName();
+    if (Fn->getName().startswith("___Z"))
+      LinkageName = Fn->getName();
+    else
+      Name = Fn->getName();
+
     Flags |= llvm::DINode::FlagPrototyped;
   }
   if (Name.startswith("\01"))
Index: clang/test/CodeGenCXX/debug-info-block-invocation-linkage-name.cpp
===================================================================
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-block-invocation-linkage-name.cpp
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -emit-llvm -debug-info-kind=standalone -fblocks -triple %itanium_abi_triple %s -o - | FileCheck %s
+
+// CHECK: !DISubprogram(linkageName: "___Z1fU13block_pointerFviE_block_invoke"
+void g(void (^call)(int));
+
+void f(void (^callback)(int)) {
+  g(^(int x){
+    callback(x);
+  });
+}
+
+void h() {
+  f(^(int x){});
+}