Index: lib/CodeGen/BackendUtil.cpp
===================================================================
--- lib/CodeGen/BackendUtil.cpp
+++ lib/CodeGen/BackendUtil.cpp
@@ -796,6 +796,17 @@
 
   ModulePassManager MPM;
 
+  // Setup PGO options.
+  if (CodeGenOpts.hasProfileIRInstr()) {
+    PB.RunProfileGen = true;
+    if (!CodeGenOpts.InstrProfileOutput.empty())
+      PB.ProfileGenFile = CodeGenOpts.InstrProfileOutput;
+    else
+      PB.ProfileGenFile = "default_%m.profraw";
+  }
+  if (CodeGenOpts.hasProfileIRUse())
+    PB.ProfileUseFile = CodeGenOpts.ProfileInstrumentUsePath;
+
   if (!CodeGenOpts.DisableLLVMPasses) {
     if (CodeGenOpts.OptimizationLevel == 0) {
       // Build a minimal pipeline based on the semantics required by Clang,