diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 05af453..aa508b8 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2269,7 +2269,7 @@
 
         // On x86-32, only the ABCD registers have 8-bit subregisters.
         if (!Subtarget->is64Bit()) {
-          TargetRegisterClass *TRC = 0;
+          const TargetRegisterClass *TRC;
           switch (N0.getValueType().getSimpleVT().SimpleTy) {
           case MVT::i32: TRC = &X86::GR32_ABCDRegClass; break;
           case MVT::i16: TRC = &X86::GR16_ABCDRegClass; break;
@@ -2298,7 +2298,7 @@
         SDValue Reg = N0.getNode()->getOperand(0);
 
         // Put the value in an ABCD register.
-        TargetRegisterClass *TRC = 0;
+        const TargetRegisterClass *TRC;
         switch (N0.getValueType().getSimpleVT().SimpleTy) {
         case MVT::i64: TRC = &X86::GR64_ABCDRegClass; break;
         case MVT::i32: TRC = &X86::GR32_ABCDRegClass; break;
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp
index d9c78f4..e464260 100644
--- a/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/utils/TableGen/RegisterInfoEmitter.cpp
@@ -480,7 +480,7 @@
       OS << "  };\n";
 
       // Output the extern for the instance.
-      OS << "  extern " << Name << "Class\t" << Name << "RegClass;\n";
+      OS << "  extern const " << Name << "Class " << Name << "RegClass;\n";
       // Output the extern for the pointer to the instance (should remove).
       OS << "  static const TargetRegisterClass * const " << Name
          << "RegisterClass = &" << Name << "RegClass;\n";
@@ -548,8 +548,9 @@
     OS << "namespace " << RegisterClasses[0]->Namespace
        << " {   // Register class instances\n";
     for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
-      OS << "  " << RegisterClasses[i]->getName()  << "Class\t"
-         << RegisterClasses[i]->getName() << "RegClass;\n";
+      OS << "  extern const " << RegisterClasses[i]->getName()  << "Class "
+         << RegisterClasses[i]->getName() << "RegClass = "
+         << RegisterClasses[i]->getName() << "Class();\n";
 
     std::map<unsigned, std::set<unsigned> > SuperRegClassMap;