Index: lib/MC/MCNullStreamer.cpp
===================================================================
--- lib/MC/MCNullStreamer.cpp
+++ lib/MC/MCNullStreamer.cpp
@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/StringRef.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
@@ -22,6 +23,9 @@
     /// @name MCStreamer Interface
     /// @{
 
+    bool hasRawTextSupport() const override { return true; }
+    void EmitRawTextImpl(StringRef String) override {}
+
     bool EmitSymbolAttribute(MCSymbol *Symbol,
                              MCSymbolAttr Attribute) override {
       return true;
Index: test/CodeGen/Hexagon/inline-asm-filetype-null.ll
===================================================================
--- /dev/null
+++ test/CodeGen/Hexagon/inline-asm-filetype-null.ll
@@ -0,0 +1,8 @@
+; RUN: llc -filetype=null < %s
+
+target triple = "hexagon"
+
+define void @foo() {
+  tail call void asm sideeffect "//", ""()
+  ret void
+}