Index: lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- lib/CodeGen/CGDebugInfo.cpp
+++ lib/CodeGen/CGDebugInfo.cpp
@@ -2287,9 +2287,8 @@
 }
 
 llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) {
-  // Ignore the atomic wrapping
-  // FIXME: What is the correct representation?
-  return getOrCreateType(Ty->getValueType(), U);
+  auto *FromTy = getOrCreateType(Ty->getValueType(), U);
+  return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy);
 }
 
 llvm::DIType* CGDebugInfo::CreateType(const PipeType *Ty,
Index: test/CodeGen/debug-info-atomic.c
===================================================================
--- /dev/null
+++ test/CodeGen/debug-info-atomic.c
@@ -0,0 +1,5 @@
+// RUN: %clang -g -c -std=c11 -S -emit-llvm -o - %s | FileCheck %s
+
+// CHECK: !DIDerivedType(tag: DW_TAG_const_type
+// CHECK: !DIDerivedType(tag: DW_TAG_atomic_type
+_Atomic const int i;