diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index 466ef2f85d4..83a390edaf8 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -32,6 +32,9 @@ namespace {
   cl::opt<bool> NoSSAPeephole("disable-ssa-peephole", cl::init(true),
                         cl::desc("Disable the ssa-based peephole optimizer "
                                  "(defaults to disabled)"));
+  cl::opt<bool> DisableOutput("disable-x86-llc-output", cl::Hidden,
+                              cl::desc("Disable the X86 asm printer, for use "
+                                       "when profiling the code generator."));
 }
 
 // allocateX86TargetMachine - Allocate and return a subclass of TargetMachine
@@ -98,7 +101,8 @@ bool X86TargetMachine::addPassesToEmitAssembly(PassManager &PM,
   if (PrintCode)  // Print the register-allocated code
     PM.add(createX86CodePrinterPass(std::cerr, *this));
 
-  PM.add(createX86CodePrinterPass(Out, *this));
+  if (!DisableOutput)
+    PM.add(createX86CodePrinterPass(Out, *this));
 
   // Delete machine code for this function
   PM.add(createMachineCodeDeleter());