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simplify the way operand flags and constraints are handled, making it easier

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to extend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31481 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-11-06 23:49:51 +00:00
parent a818e92f8b
commit a0cca4ae26
4 changed files with 79 additions and 70 deletions
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11
utils/TableGen/CodeGenInstruction.h
View File

@ -60,6 +60,9 @@ namespace llvm {
/// MIOperandInfo - Default MI operand type. Note an operand may be made
/// up of multiple MI operands.
DagInit *MIOperandInfo;
/// Constraint info for this operand.
std::string Constraint;
OperandInfo(Record *R, const std::string &N, const std::string &PMN,
unsigned MION, unsigned MINO, DagInit *MIOI)
@ -71,14 +74,6 @@ namespace llvm {
/// type (which is a record).
std::vector<OperandInfo> OperandList;
/// ConstraintStr - The operand constraints string.
///
std::string ConstraintStr;
/// ConstraintsList - List of constraints, encoded into one unsigned int per
/// operand.
std::vector<unsigned> ConstraintsList;
// Various boolean values we track for the instruction.
bool isReturn;
bool isBranch;

51
utils/TableGen/CodeGenTarget.cpp
View File

@ -19,7 +19,6 @@
#include "Record.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetInstrInfo.h"
#include <set>
#include <algorithm>
using namespace llvm;
@ -274,8 +273,8 @@ bool CodeGenTarget::isLittleEndianEncoding() const {
return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
}
static std::pair<unsigned, unsigned> parseConstraint(const std::string &CStr,
CodeGenInstruction *I) {
static std::string ParseConstraint(const std::string &CStr,
CodeGenInstruction *I, unsigned &DestOp) {
const std::string ops("="); // FIXME: Only supports TIED_TO for now.
std::string::size_type pos = CStr.find_first_of(ops);
assert(pos != std::string::npos && "Unrecognized constraint");
@ -286,26 +285,24 @@ static std::pair<unsigned, unsigned> parseConstraint(const std::string &CStr,
std::string::size_type wpos = Name.find_first_of(delims);
if (wpos != std::string::npos)
Name = Name.substr(0, wpos);
unsigned FIdx = I->getOperandNamed(Name);
DestOp = I->getOperandNamed(Name);
Name = CStr.substr(pos+1);
wpos = Name.find_first_not_of(delims);
if (wpos != std::string::npos)
Name = Name.substr(wpos+1);
unsigned TIdx = I->getOperandNamed(Name);
if (TIdx >= FIdx)
if (TIdx >= DestOp)
throw "Illegal tied-to operand constraint '" + CStr + "'";
return std::make_pair(FIdx, (TIdx << 16) |
(1 << (unsigned)TargetInstrInfo::TIED_TO));
// Build the string.
return "((" + utostr(TIdx) + " << 16) | TargetInstrInfo::TIED_TO)";
}
static std::vector<unsigned> parseConstraints(const std::string &CStr,
CodeGenInstruction *I) {
unsigned NumOps = I->OperandList.size();
std::vector<unsigned> Res(NumOps, 0);
if (CStr == "")
return Res;
static void ParseConstraints(const std::string &CStr, CodeGenInstruction *I) {
if (CStr.empty()) return;
const std::string delims(",");
std::string::size_type bidx, eidx;
@ -314,13 +311,16 @@ static std::vector<unsigned> parseConstraints(const std::string &CStr,
eidx = CStr.find_first_of(delims, bidx);
if (eidx == std::string::npos)
eidx = CStr.length();
std::pair<unsigned, unsigned> C =
parseConstraint(CStr.substr(bidx, eidx), I);
Res[C.first] = C.second;
unsigned OpNo;
std::string Constr = ParseConstraint(CStr.substr(bidx, eidx), I, OpNo);
assert(OpNo < I->OperandList.size() && "Invalid operand no?");
if (!I->OperandList[OpNo].Constraint.empty())
throw "Operand #" + utostr(OpNo) + " cannot have multiple constraints!";
I->OperandList[OpNo].Constraint = Constr;
bidx = CStr.find_first_not_of(delims, eidx);
}
return Res;
}
CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
@ -403,8 +403,17 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
MIOperandNo += NumOps;
}
ConstraintStr = R->getValueAsString("Constraints");
ConstraintsList = parseConstraints(ConstraintStr, this);
ParseConstraints(R->getValueAsString("Constraints"), this);
// For backward compatibility: isTwoAddress means operand 1 is tied to
// operand 0.
if (isTwoAddress && OperandList[1].Constraint.empty())
OperandList[1].Constraint = "((0 << 16) | TargetInstrInfo::TIED_TO)";
// Any operands with unset constraints get 0 as their constraint.
for (unsigned op = 0, e = OperandList.size(); op != e; ++op)
if (OperandList[op].Constraint.empty())
OperandList[op].Constraint = "0";
}

84
utils/TableGen/InstrInfoEmitter.cpp
View File

@ -63,35 +63,52 @@ void InstrInfoEmitter::printDefList(const std::vector<Record*> &Uses,
OS << "0 };\n";
}
static std::vector<std::pair<Record*, unsigned> >
GetOperandInfo(const CodeGenInstruction &Inst) {
std::vector<std::pair<Record*, unsigned> > Result;
std::vector<std::string>
InstrInfoEmitter::GetOperandInfo(const CodeGenInstruction &Inst) {
std::vector<std::string> Result;
for (unsigned i = 0, e = Inst.OperandList.size(); i != e; ++i) {
if (Inst.OperandList[i].Rec->isSubClassOf("RegisterClass")) {
Result.push_back(std::make_pair(Inst.OperandList[i].Rec,
Inst.ConstraintsList[i]));
std::string OpStr = getQualifiedName(Inst.OperandList[i].Rec);
OpStr += "RegClassID, 0, ";
OpStr += Inst.OperandList[i].Constraint;
Result.push_back(OpStr);
} else {
// This might be a multiple operand thing.
// Targets like X86 have registers in their multi-operand operands.
// This might be a multiple operand thing. Targets like X86 have
// registers in their multi-operand operands. It may also be an anonymous
// operand, which has a single operand, but no declared class for the
// operand.
DagInit *MIOI = Inst.OperandList[i].MIOperandInfo;
unsigned NumDefs = MIOI->getNumArgs();
for (unsigned j = 0, e = Inst.OperandList[i].MINumOperands; j != e; ++j) {
if (NumDefs <= j) {
Result.push_back(std::make_pair((Record*)0, Inst.ConstraintsList[i]));
} else {
DefInit *Def = dynamic_cast<DefInit*>(MIOI->getArg(j));
Result.push_back(std::make_pair(Def ? Def->getDef() : 0,
Inst.ConstraintsList[i]));
}
Record *OpR = 0;
if (MIOI && j < MIOI->getNumArgs())
if (DefInit *Def = dynamic_cast<DefInit*>(MIOI->getArg(j)))
OpR = Def->getDef();
std::string Res;
if (OpR && OpR->isSubClassOf("RegisterClass"))
Res += getQualifiedName(OpR) + "RegClassID, ";
else
Res += "0, ";
// Fill in applicable flags.
Res += "0";
// Ptr value whose register class is resolved via callback.
if (OpR && OpR->getName() == "ptr_rc")
Res += "|M_LOOK_UP_PTR_REG_CLASS";
// fill in constraint info.
Res += ", " + Inst.OperandList[i].Constraint;
Result.push_back(Res);
}
}
}
// For backward compatibility: isTwoAddress means operand 1 is tied to
// operand 0.
if (Inst.isTwoAddress)
Result[1].second |= (0 << 16) | (1 << (unsigned)TargetInstrInfo::TIED_TO);
return Result;
}
@ -127,34 +144,21 @@ void InstrInfoEmitter::run(std::ostream &OS) {
}
}
std::map<std::vector<std::pair<Record*, unsigned> >, unsigned>
OperandInfosEmitted;
std::map<std::vector<std::string>, unsigned> OperandInfosEmitted;
unsigned OperandListNum = 0;
OperandInfosEmitted[std::vector<std::pair<Record*, unsigned> >()] =
++OperandListNum;
OperandInfosEmitted[std::vector<std::string>()] = ++OperandListNum;
// Emit all of the operand info records.
OS << "\n";
for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
E = Target.inst_end(); II != E; ++II) {
std::vector<std::pair<Record*, unsigned> > OperandInfo =
GetOperandInfo(II->second);
std::vector<std::string> OperandInfo = GetOperandInfo(II->second);
unsigned &N = OperandInfosEmitted[OperandInfo];
if (N == 0) {
N = ++OperandListNum;
OS << "static const TargetOperandInfo OperandInfo" << N << "[] = { ";
for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i) {
Record *RC = OperandInfo[i].first;
// FIXME: We only care about register operands for now.
if (RC && RC->isSubClassOf("RegisterClass"))
OS << "{ " << getQualifiedName(RC) << "RegClassID, 0, ";
else if (RC && RC->getName() == "ptr_rc")
// Ptr value whose register class is resolved via callback.
OS << "{ 0, 1, ";
else
OS << "{ 0, 0, ";
OS << OperandInfo[i].second << " }, ";
}
for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i)
OS << "{ " << OperandInfo[i] << " }, ";
OS << "};\n";
}
}
@ -176,7 +180,7 @@ void InstrInfoEmitter::run(std::ostream &OS) {
void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
Record *InstrInfo,
std::map<std::vector<Record*>, unsigned> &EmittedLists,
std::map<std::vector<std::pair<Record*,unsigned> >, unsigned> &OpInfo,
std::map<std::vector<std::string>, unsigned> &OpInfo,
std::ostream &OS) {
int MinOperands;
if (!Inst.OperandList.empty())
@ -262,7 +266,7 @@ void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
OS << "ImplicitList" << EmittedLists[DefList] << ", ";
// Emit the operand info.
std::vector<std::pair<Record*,unsigned> > OperandInfo = GetOperandInfo(Inst);
std::vector<std::string> OperandInfo = GetOperandInfo(Inst);
if (OperandInfo.empty())
OS << "0";
else

3
utils/TableGen/InstrInfoEmitter.h
View File

@ -45,12 +45,13 @@ private:
void emitRecord(const CodeGenInstruction &Inst, unsigned Num,
Record *InstrInfo,
std::map<std::vector<Record*>, unsigned> &EL,
std::map<std::vector<std::pair<Record*,unsigned> >, unsigned> &OpInfo,
std::map<std::vector<std::string>, unsigned> &OpInfo,
std::ostream &OS);
void GatherItinClasses();
unsigned ItinClassNumber(std::string ItinName);
void emitShiftedValue(Record *R, StringInit *Val, IntInit *Shift,
std::ostream &OS);
std::vector<std::string> GetOperandInfo(const CodeGenInstruction &Inst);
};
} // End llvm namespace