diff --git a/clang/test/CodeGen/xcoff-comdat.cpp b/clang/test/CodeGen/xcoff-comdat.cpp
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/xcoff-comdat.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple powerpc-ibm-aix -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64-ibm-aix -emit-llvm -o - %s | FileCheck %s
+
+class a {
+  virtual void d() {}
+  virtual void e();
+};
+void a::e() {}
+
+// CHECK-NOT: = comdat
\ No newline at end of file
diff --git a/llvm/include/llvm/ADT/Triple.h b/llvm/include/llvm/ADT/Triple.h
--- a/llvm/include/llvm/ADT/Triple.h
+++ b/llvm/include/llvm/ADT/Triple.h
@@ -743,7 +743,7 @@
 
   /// Tests whether the target supports comdat
   bool supportsCOMDAT() const {
-    return !isOSBinFormatMachO();
+    return !(isOSBinFormatMachO() || isOSBinFormatXCOFF());
   }
 
   /// Tests whether the target uses emulated TLS as default.