diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td
index a30d40f97d6..dcbf5f288d8 100644
--- a/include/llvm/Target/Target.td
+++ b/include/llvm/Target/Target.td
@@ -290,14 +290,25 @@ def unknown;
 /// match a subset of some other class, in which case the super class field
 /// should be defined.
 class AsmOperandClass {
-  /// The name to use for this class, this should be usable as an enum value,
-  /// and will be used to generated the names for the methods to test whether a
-  /// particular target specific operand matches this class, and the method to
-  /// convert an operand of this class into an MCInst operand.
+  /// The name to use for this class, which should be usable as an enum value.
   string Name = ?;
 
   /// The super class of this operand.
   AsmOperandClass SuperClass = ?;
+
+  /// The name of the method on the target specific operand to call to test
+  /// whether the operand is an instance of this class. If not set, this will
+  /// default to "isFoo", where Foo is the AsmOperandClass name. The method
+  /// signature should be:
+  ///   bool isFoo() const;
+  string PredicateMethod = ?;
+
+  /// The name of the method on the target specific operand to call to add the
+  /// target specific operand to an MCInst. If not set, this will default to
+  /// "addFooOperands", where Foo is the AsmOperandClass name. The method
+  /// signature should be:
+  ///   void addFooOperands(MCInst &Inst, unsigned N) const;
+  string RenderMethod = ?;
 }
 
 def ImmAsmOperand : AsmOperandClass {
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 5a42683a494..c3e292eb7e9 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -154,23 +154,23 @@ struct X86Operand {
 
   bool isReg() const { return Kind == Register; }
 
-  void addRegOperands(MCInst &Inst, unsigned N) {
+  void addRegOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     Inst.addOperand(MCOperand::CreateReg(getReg()));
   }
 
-  void addImmOperands(MCInst &Inst, unsigned N) {
+  void addImmOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     Inst.addOperand(MCOperand::CreateMCValue(getImm()));
   }
 
-  void addImmSExt8Operands(MCInst &Inst, unsigned N) {
+  void addImmSExt8Operands(MCInst &Inst, unsigned N) const {
     // FIXME: Support user customization of the render method.
     assert(N == 1 && "Invalid number of operands!");
     Inst.addOperand(MCOperand::CreateMCValue(getImm()));
   }
 
-  void addMemOperands(MCInst &Inst, unsigned N) {
+  void addMemOperands(MCInst &Inst, unsigned N) const {
     assert((N == 4 || N == 5) && "Invalid number of operands!");
 
     Inst.addOperand(MCOperand::CreateReg(getMemBaseReg()));
diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 0f3f9ed97f6..019348bf944 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -589,8 +589,27 @@ void AsmMatcherInfo::BuildInfo(CodeGenTarget &Target) {
     CI->ClassName = (*it)->getValueAsString("Name");
     CI->Name = "MCK_" + CI->ClassName;
     CI->ValueName = (*it)->getName();
-    CI->PredicateMethod = "is" + CI->ClassName;
-    CI->RenderMethod = "add" + CI->ClassName + "Operands";
+
+    // Get or construct the predicate method name.
+    Init *PMName = (*it)->getValueInit("PredicateMethod");
+    if (StringInit *SI = dynamic_cast<StringInit*>(PMName)) {
+      CI->PredicateMethod = SI->getValue();
+    } else {
+      assert(dynamic_cast<UnsetInit*>(PMName) && 
+             "Unexpected PredicateMethod field!");
+      CI->PredicateMethod = "is" + CI->ClassName;
+    }
+
+    // Get or construct the render method name.
+    Init *RMName = (*it)->getValueInit("RenderMethod");
+    if (StringInit *SI = dynamic_cast<StringInit*>(RMName)) {
+      CI->RenderMethod = SI->getValue();
+    } else {
+      assert(dynamic_cast<UnsetInit*>(RMName) &&
+             "Unexpected RenderMethod field!");
+      CI->RenderMethod = "add" + CI->ClassName + "Operands";
+    }
+
     AsmOperandClasses[*it] = CI;
     Classes.push_back(CI);
   }