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Target: Allow target specific operand types

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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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225661 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2015-01-12 19:33:09 +00:00
parent 2211d38267
commit b461e8304c
4 changed files with 15 additions and 8 deletions
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11
include/llvm/MC/MCInstrDesc.h
View File

@ -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
};
}

3
include/llvm/Target/Target.td
View File

@ -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 {

7
utils/TableGen/CodeGenInstruction.cpp
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@ -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;
}

2
utils/TableGen/InstrInfoEmitter.cpp
View File

@ -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;