Target: Allow target specific operand types

This adds two new fields to the RegisterOperand TableGen class:

string OperandNamespace = "MCOI";
string OperandType = "OPERAND_REGISTER";

These fields can be used to specify a target specific operand type,
which will be stored in the OperandType member of the MCOperandInfo
object.

This can be useful for targets that need to store some extra information
about operands that cannot be expressed using the target independent
types.  For example, in the R600 backend, there are operands which
can take either registers or immediates and it is convenient to be able
to specify this in the TableGen definitions.

llvm-svn: 225661

llvm/include/llvm/MC/MCInstrDesc.h

@@ -44,11 +44,12 @@ namespace MCOI {
 
   /// Operand Type - Operands are tagged with one of the values of this enum.
   enum OperandType {
-    OPERAND_UNKNOWN,
-    OPERAND_IMMEDIATE,
-    OPERAND_REGISTER,
-    OPERAND_MEMORY,
-    OPERAND_PCREL
+    OPERAND_UNKNOWN      = 0,
+    OPERAND_IMMEDIATE    = 1,
+    OPERAND_REGISTER     = 2,
+    OPERAND_MEMORY       = 3,
+    OPERAND_PCREL        = 4,
+    OPERAND_FIRST_TARGET = 5
   };
 }
 

llvm/include/llvm/Target/Target.td

@@ -624,6 +624,9 @@ class RegisterOperand<RegisterClass regclass, string pm = "printOperand">
   // can match a subset of some other class, in which case the AsmOperandClass
   // should declare the other operand as one of its super classes.
   AsmOperandClass ParserMatchClass;
+
+  string OperandNamespace = "MCOI";
+  string OperandType = "OPERAND_REGISTER";
 }
 
 let OperandType = "OPERAND_IMMEDIATE" in {

llvm/utils/TableGen/CodeGenInstruction.cpp

@@ -68,10 +68,13 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
     std::string PrintMethod = "printOperand";
     std::string EncoderMethod;
     std::string OperandType = "OPERAND_UNKNOWN";
+    std::string OperandNamespace = "MCOI";
     unsigned NumOps = 1;
     DagInit *MIOpInfo = nullptr;
     if (Rec->isSubClassOf("RegisterOperand")) {
       PrintMethod = Rec->getValueAsString("PrintMethod");
+      OperandType = Rec->getValueAsString("OperandType");
+      OperandNamespace = Rec->getValueAsString("OperandNamespace");
     } else if (Rec->isSubClassOf("Operand")) {
       PrintMethod = Rec->getValueAsString("PrintMethod");
       OperandType = Rec->getValueAsString("OperandType");
@@ -113,8 +116,8 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
                       Twine(i) + " has the same name as a previous operand!");
 
     OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod,
-                                      OperandType, MIOperandNo, NumOps,
-                                      MIOpInfo));
+                                      OperandNamespace + "::" + OperandType,
+				      MIOperandNo, NumOps, MIOpInfo));
     MIOperandNo += NumOps;
   }
 

llvm/utils/TableGen/InstrInfoEmitter.cpp

@@ -143,7 +143,7 @@ InstrInfoEmitter::GetOperandInfo(const CodeGenInstruction &Inst) {
         Res += "|(1<<MCOI::OptionalDef)";
 
       // Fill in operand type.
-      Res += ", MCOI::";
+      Res += ", ";
       assert(!Op.OperandType.empty() && "Invalid operand type.");
       Res += Op.OperandType;