[llvm-commits] [llvm] r159162 - /llvm/trunk/include/llvm/Target/Target.td

[Owen Anderson]

Author: resistor
Date: Mon Jun 25 16:25:16 2012
New Revision: 159162

URL: http://llvm.org/viewvc/llvm-project?rev=159162&view=rev
Log:
Define DAGOperand, an empty base class for RegisterClass and Operand.  This allows one to write multiclasses that are polymorphic over both registers and non-register operands.

Modified:
    llvm/trunk/include/llvm/Target/Target.td

Modified: llvm/trunk/include/llvm/Target/Target.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/Target.td?rev=159162&r1=159161&r2=159162&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Target/Target.td (original)
+++ llvm/trunk/include/llvm/Target/Target.td Mon Jun 25 16:25:16 2012
@@ -111,13 +111,20 @@
   let SubRegs = subregs;
 }
 
+// DAGOperand - An empty base class that unifies RegisterClass's and other forms
+// of Operand's that are legal as type qualifiers in DAG patterns.  This should
+// only ever be used for defining multiclasses that are polymorphic over both
+// RegisterClass's and other Operand's.
+class DAGOperand { }
+
 // RegisterClass - Now that all of the registers are defined, and aliases
 // between registers are defined, specify which registers belong to which
 // register classes.  This also defines the default allocation order of
 // registers by register allocators.
 //
 class RegisterClass<string namespace, list<ValueType> regTypes, int alignment,
-                    dag regList, RegAltNameIndex idx = NoRegAltName> {
+                    dag regList, RegAltNameIndex idx = NoRegAltName>
+  : DAGOperand {
   string Namespace = namespace;
 
   // RegType - Specify the list ValueType of the registers in this register
@@ -537,7 +544,7 @@
 /// Operand Types - These provide the built-in operand types that may be used
 /// by a target.  Targets can optionally provide their own operand types as
 /// needed, though this should not be needed for RISC targets.
-class Operand<ValueType ty> {
+class Operand<ValueType ty> : DAGOperand {
   ValueType Type = ty;
   string PrintMethod = "printOperand";
   string EncoderMethod = "";