// allocation used by the register allocator.
//
list<Register> MemberList = regList;
+
+ // SubClassList - Specify which register classes correspond to subregisters
+ // of this class. The order should be by subregister set index.
+ list<RegisterClass> SubRegClassList = [];
// MethodProtos/MethodBodies - These members can be used to insert arbitrary
// code into a generated register class. The normal usage of this is to
string Name = ""; // The opcode string for this instruction
string Namespace = "";
- dag OperandList; // An dag containing the MI operand list.
+ dag OutOperandList; // An dag containing the MI def operand list.
+ dag InOperandList; // An dag containing the MI use operand list.
string AsmString = ""; // The .s format to print the instruction with.
// Pattern - Set to the DAG pattern for this instruction, if we know of one,
bit hasDelaySlot = 0; // Does this instruction have an delay slot?
bit usesCustomDAGSchedInserter = 0; // Pseudo instr needing special help.
bit hasCtrlDep = 0; // Does this instruction r/w ctrl-flow chains?
- bit noResults = 0; // Does this instruction produce no results?
+ bit isNotDuplicable = 0; // Is it unsafe to duplicate this instruction?
InstrItinClass Itinerary = NoItinerary;// Execution steps used for scheduling.
}
/// ops definition - This is just a simple marker used to identify the operands
-/// list for an instruction. This should be used like this:
-/// (ops R32:$dst, R32:$src) or something similar.
+/// list for an instruction. outs and ins are identical both syntatically and
+/// semantically, they are used to define def operands and use operands to
+/// improve readibility. This should be used like this:
+/// (outs R32:$dst), (ins R32:$src1, R32:$src2) or something similar.
def ops;
+def outs;
+def ins;
/// variable_ops definition - Mark this instruction as taking a variable number
/// of operands.
def i32imm : Operand<i32>;
def i64imm : Operand<i64>;
+/// zero_reg definition - Special node to stand for the zero register.
+///
+def zero_reg;
/// PredicateOperand - This can be used to define a predicate operand for an
/// instruction. OpTypes specifies the MIOperandInfo for the operand, and
/// AlwaysVal specifies the value of this predicate when set to "always
/// execute".
-class PredicateOperand<ValueType ty, dag OpTypes, dag AlwaysVal> : Operand<ty> {
+class PredicateOperand<ValueType ty, dag OpTypes, dag AlwaysVal>
+ : Operand<ty> {
let MIOperandInfo = OpTypes;
- dag ExecuteAlways = AlwaysVal;
+ dag DefaultOps = AlwaysVal;
+}
+
+/// OptionalDefOperand - This is used to define a optional definition operand
+/// for an instruction. DefaultOps is the register the operand represents if none
+/// is supplied, e.g. zero_reg.
+class OptionalDefOperand<ValueType ty, dag OpTypes, dag defaultops>
+ : Operand<ty> {
+ let MIOperandInfo = OpTypes;
+ dag DefaultOps = defaultops;
}
// Standard Instructions.
def PHI : Instruction {
- let OperandList = (ops variable_ops);
+ let OutOperandList = (ops);
+ let InOperandList = (ops variable_ops);
let AsmString = "PHINODE";
let Namespace = "TargetInstrInfo";
}
def INLINEASM : Instruction {
- let OperandList = (ops variable_ops);
+ let OutOperandList = (ops);
+ let InOperandList = (ops variable_ops);
let AsmString = "";
let Namespace = "TargetInstrInfo";
}
def LABEL : Instruction {
- let OperandList = (ops i32imm:$id);
+ let OutOperandList = (ops);
+ let InOperandList = (ops i32imm:$id);
let AsmString = "";
let Namespace = "TargetInstrInfo";
let hasCtrlDep = 1;
}
+def EXTRACT_SUBREG : Instruction {
+ let OutOperandList = (ops variable_ops);
+ let InOperandList = (ops variable_ops);
+ let AsmString = "";
+ let Namespace = "TargetInstrInfo";
+}
+def INSERT_SUBREG : Instruction {
+ let OutOperandList = (ops variable_ops);
+ let InOperandList = (ops variable_ops);
+ let AsmString = "";
+ let Namespace = "TargetInstrInfo";
+}
//===----------------------------------------------------------------------===//
// AsmWriter - This class can be implemented by targets that need to customize