Index: include/llvm/CodeGen/PseudoSourceValue.h
===================================================================
--- include/llvm/CodeGen/PseudoSourceValue.h
+++ include/llvm/CodeGen/PseudoSourceValue.h
@@ -40,7 +40,8 @@
     ConstantPool,
     FixedStack,
     GlobalValueCallEntry,
-    ExternalSymbolCallEntry
+    ExternalSymbolCallEntry,
+    TargetCustom
   };
 
 private:
@@ -63,6 +64,9 @@
   bool isGOT() const { return Kind == GOT; }
   bool isConstantPool() const { return Kind == ConstantPool; }
   bool isJumpTable() const { return Kind == JumpTable; }
+  unsigned getTargetCustom() const {
+    return (Kind >= TargetCustom) ? ((Kind+1) - TargetCustom) : 0;
+  }
 
   /// Test whether the memory pointed to by this PseudoSourceValue has a
   /// constant value.
Index: lib/CodeGen/MIRPrinter.cpp
===================================================================
--- lib/CodeGen/MIRPrinter.cpp
+++ lib/CodeGen/MIRPrinter.cpp
@@ -892,6 +892,9 @@
       printLLVMNameWithoutPrefix(
           OS, cast<ExternalSymbolPseudoSourceValue>(PVal)->getSymbol());
       break;
+    case PseudoSourceValue::TargetCustom:
+      llvm_unreachable("TargetCustom pseudo source values are not supported");
+      break;
     }
   }
   printOffset(Op.getOffset());