mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-05 13:09:10 +00:00
a606d955de
MachineRegisterInfo doesn't have to confusingly allocate an extra entry. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106296 91177308-0d34-0410-b5e6-96231b3b80d8
335 lines
12 KiB
C++
335 lines
12 KiB
C++
//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This tablegen backend is responsible for emitting a description of the target
|
|
// instruction set for the code generator.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "InstrInfoEmitter.h"
|
|
#include "CodeGenTarget.h"
|
|
#include "Record.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include <algorithm>
|
|
using namespace llvm;
|
|
|
|
static void PrintDefList(const std::vector<Record*> &Uses,
|
|
unsigned Num, raw_ostream &OS) {
|
|
OS << "static const unsigned ImplicitList" << Num << "[] = { ";
|
|
for (unsigned i = 0, e = Uses.size(); i != e; ++i)
|
|
OS << getQualifiedName(Uses[i]) << ", ";
|
|
OS << "0 };\n";
|
|
}
|
|
|
|
static void PrintBarriers(std::vector<Record*> &Barriers,
|
|
unsigned Num, raw_ostream &OS) {
|
|
OS << "static const TargetRegisterClass* Barriers" << Num << "[] = { ";
|
|
for (unsigned i = 0, e = Barriers.size(); i != e; ++i)
|
|
OS << "&" << getQualifiedName(Barriers[i]) << "RegClass, ";
|
|
OS << "NULL };\n";
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Instruction Itinerary Information.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void InstrInfoEmitter::GatherItinClasses() {
|
|
std::vector<Record*> DefList =
|
|
Records.getAllDerivedDefinitions("InstrItinClass");
|
|
std::sort(DefList.begin(), DefList.end(), LessRecord());
|
|
|
|
for (unsigned i = 0, N = DefList.size(); i < N; i++)
|
|
ItinClassMap[DefList[i]->getName()] = i;
|
|
}
|
|
|
|
unsigned InstrInfoEmitter::getItinClassNumber(const Record *InstRec) {
|
|
return ItinClassMap[InstRec->getValueAsDef("Itinerary")->getName()];
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Operand Info Emission.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
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) {
|
|
// Handle aggregate operands and normal operands the same way by expanding
|
|
// either case into a list of operands for this op.
|
|
std::vector<CodeGenInstruction::OperandInfo> OperandList;
|
|
|
|
// 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;
|
|
|
|
if (!MIOI || MIOI->getNumArgs() == 0) {
|
|
// Single, anonymous, operand.
|
|
OperandList.push_back(Inst.OperandList[i]);
|
|
} else {
|
|
for (unsigned j = 0, e = Inst.OperandList[i].MINumOperands; j != e; ++j) {
|
|
OperandList.push_back(Inst.OperandList[i]);
|
|
|
|
Record *OpR = dynamic_cast<DefInit*>(MIOI->getArg(j))->getDef();
|
|
OperandList.back().Rec = OpR;
|
|
}
|
|
}
|
|
|
|
for (unsigned j = 0, e = OperandList.size(); j != e; ++j) {
|
|
Record *OpR = OperandList[j].Rec;
|
|
std::string Res;
|
|
|
|
if (OpR->isSubClassOf("RegisterClass"))
|
|
Res += getQualifiedName(OpR) + "RegClassID, ";
|
|
else if (OpR->isSubClassOf("PointerLikeRegClass"))
|
|
Res += utostr(OpR->getValueAsInt("RegClassKind")) + ", ";
|
|
else
|
|
// -1 means the operand does not have a fixed register class.
|
|
Res += "-1, ";
|
|
|
|
// Fill in applicable flags.
|
|
Res += "0";
|
|
|
|
// Ptr value whose register class is resolved via callback.
|
|
if (OpR->isSubClassOf("PointerLikeRegClass"))
|
|
Res += "|(1<<TOI::LookupPtrRegClass)";
|
|
|
|
// Predicate operands. Check to see if the original unexpanded operand
|
|
// was of type PredicateOperand.
|
|
if (Inst.OperandList[i].Rec->isSubClassOf("PredicateOperand"))
|
|
Res += "|(1<<TOI::Predicate)";
|
|
|
|
// Optional def operands. Check to see if the original unexpanded operand
|
|
// was of type OptionalDefOperand.
|
|
if (Inst.OperandList[i].Rec->isSubClassOf("OptionalDefOperand"))
|
|
Res += "|(1<<TOI::OptionalDef)";
|
|
|
|
// Fill in constraint info.
|
|
Res += ", ";
|
|
|
|
const CodeGenInstruction::ConstraintInfo &Constraint =
|
|
Inst.OperandList[i].Constraints[j];
|
|
if (Constraint.isNone())
|
|
Res += "0";
|
|
else if (Constraint.isEarlyClobber())
|
|
Res += "(1 << TOI::EARLY_CLOBBER)";
|
|
else {
|
|
assert(Constraint.isTied());
|
|
Res += "((" + utostr(Constraint.getTiedOperand()) +
|
|
" << 16) | (1 << TOI::TIED_TO))";
|
|
}
|
|
|
|
Result.push_back(Res);
|
|
}
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
void InstrInfoEmitter::EmitOperandInfo(raw_ostream &OS,
|
|
OperandInfoMapTy &OperandInfoIDs) {
|
|
// ID #0 is for no operand info.
|
|
unsigned OperandListNum = 0;
|
|
OperandInfoIDs[std::vector<std::string>()] = ++OperandListNum;
|
|
|
|
OS << "\n";
|
|
const CodeGenTarget &Target = CDP.getTargetInfo();
|
|
for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
|
|
E = Target.inst_end(); II != E; ++II) {
|
|
std::vector<std::string> OperandInfo = GetOperandInfo(**II);
|
|
unsigned &N = OperandInfoIDs[OperandInfo];
|
|
if (N != 0) continue;
|
|
|
|
N = ++OperandListNum;
|
|
OS << "static const TargetOperandInfo OperandInfo" << N << "[] = { ";
|
|
for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i)
|
|
OS << "{ " << OperandInfo[i] << " }, ";
|
|
OS << "};\n";
|
|
}
|
|
}
|
|
|
|
void InstrInfoEmitter::DetectRegisterClassBarriers(std::vector<Record*> &Defs,
|
|
const std::vector<CodeGenRegisterClass> &RCs,
|
|
std::vector<Record*> &Barriers) {
|
|
std::set<Record*> DefSet;
|
|
unsigned NumDefs = Defs.size();
|
|
for (unsigned i = 0; i < NumDefs; ++i)
|
|
DefSet.insert(Defs[i]);
|
|
|
|
for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
|
|
const CodeGenRegisterClass &RC = RCs[i];
|
|
unsigned NumRegs = RC.Elements.size();
|
|
if (NumRegs > NumDefs)
|
|
continue; // Can't possibly clobber this RC.
|
|
|
|
bool Clobber = true;
|
|
for (unsigned j = 0; j < NumRegs; ++j) {
|
|
Record *Reg = RC.Elements[j];
|
|
if (!DefSet.count(Reg)) {
|
|
Clobber = false;
|
|
break;
|
|
}
|
|
}
|
|
if (Clobber)
|
|
Barriers.push_back(RC.TheDef);
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Main Output.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// run - Emit the main instruction description records for the target...
|
|
void InstrInfoEmitter::run(raw_ostream &OS) {
|
|
GatherItinClasses();
|
|
|
|
EmitSourceFileHeader("Target Instruction Descriptors", OS);
|
|
OS << "namespace llvm {\n\n";
|
|
|
|
CodeGenTarget &Target = CDP.getTargetInfo();
|
|
const std::string &TargetName = Target.getName();
|
|
Record *InstrInfo = Target.getInstructionSet();
|
|
const std::vector<CodeGenRegisterClass> &RCs = Target.getRegisterClasses();
|
|
|
|
// Keep track of all of the def lists we have emitted already.
|
|
std::map<std::vector<Record*>, unsigned> EmittedLists;
|
|
unsigned ListNumber = 0;
|
|
std::map<std::vector<Record*>, unsigned> EmittedBarriers;
|
|
unsigned BarrierNumber = 0;
|
|
std::map<Record*, unsigned> BarriersMap;
|
|
|
|
// Emit all of the instruction's implicit uses and defs.
|
|
for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
|
|
E = Target.inst_end(); II != E; ++II) {
|
|
Record *Inst = (*II)->TheDef;
|
|
std::vector<Record*> Uses = Inst->getValueAsListOfDefs("Uses");
|
|
if (!Uses.empty()) {
|
|
unsigned &IL = EmittedLists[Uses];
|
|
if (!IL) PrintDefList(Uses, IL = ++ListNumber, OS);
|
|
}
|
|
std::vector<Record*> Defs = Inst->getValueAsListOfDefs("Defs");
|
|
if (!Defs.empty()) {
|
|
std::vector<Record*> RCBarriers;
|
|
DetectRegisterClassBarriers(Defs, RCs, RCBarriers);
|
|
if (!RCBarriers.empty()) {
|
|
unsigned &IB = EmittedBarriers[RCBarriers];
|
|
if (!IB) PrintBarriers(RCBarriers, IB = ++BarrierNumber, OS);
|
|
BarriersMap.insert(std::make_pair(Inst, IB));
|
|
}
|
|
|
|
unsigned &IL = EmittedLists[Defs];
|
|
if (!IL) PrintDefList(Defs, IL = ++ListNumber, OS);
|
|
}
|
|
}
|
|
|
|
OperandInfoMapTy OperandInfoIDs;
|
|
|
|
// Emit all of the operand info records.
|
|
EmitOperandInfo(OS, OperandInfoIDs);
|
|
|
|
// Emit all of the TargetInstrDesc records in their ENUM ordering.
|
|
//
|
|
OS << "\nstatic const TargetInstrDesc " << TargetName
|
|
<< "Insts[] = {\n";
|
|
const std::vector<const CodeGenInstruction*> &NumberedInstructions =
|
|
Target.getInstructionsByEnumValue();
|
|
|
|
for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i)
|
|
emitRecord(*NumberedInstructions[i], i, InstrInfo, EmittedLists,
|
|
BarriersMap, OperandInfoIDs, OS);
|
|
OS << "};\n";
|
|
OS << "} // End llvm namespace \n";
|
|
}
|
|
|
|
void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
|
|
Record *InstrInfo,
|
|
std::map<std::vector<Record*>, unsigned> &EmittedLists,
|
|
std::map<Record*, unsigned> &BarriersMap,
|
|
const OperandInfoMapTy &OpInfo,
|
|
raw_ostream &OS) {
|
|
int MinOperands = 0;
|
|
if (!Inst.OperandList.empty())
|
|
// Each logical operand can be multiple MI operands.
|
|
MinOperands = Inst.OperandList.back().MIOperandNo +
|
|
Inst.OperandList.back().MINumOperands;
|
|
|
|
OS << " { ";
|
|
OS << Num << ",\t" << MinOperands << ",\t"
|
|
<< Inst.NumDefs << ",\t" << getItinClassNumber(Inst.TheDef)
|
|
<< ",\t\"" << Inst.TheDef->getName() << "\", 0";
|
|
|
|
// Emit all of the target indepedent flags...
|
|
if (Inst.isReturn) OS << "|(1<<TID::Return)";
|
|
if (Inst.isBranch) OS << "|(1<<TID::Branch)";
|
|
if (Inst.isIndirectBranch) OS << "|(1<<TID::IndirectBranch)";
|
|
if (Inst.isBarrier) OS << "|(1<<TID::Barrier)";
|
|
if (Inst.hasDelaySlot) OS << "|(1<<TID::DelaySlot)";
|
|
if (Inst.isCall) OS << "|(1<<TID::Call)";
|
|
if (Inst.canFoldAsLoad) OS << "|(1<<TID::FoldableAsLoad)";
|
|
if (Inst.mayLoad) OS << "|(1<<TID::MayLoad)";
|
|
if (Inst.mayStore) OS << "|(1<<TID::MayStore)";
|
|
if (Inst.isPredicable) OS << "|(1<<TID::Predicable)";
|
|
if (Inst.isConvertibleToThreeAddress) OS << "|(1<<TID::ConvertibleTo3Addr)";
|
|
if (Inst.isCommutable) OS << "|(1<<TID::Commutable)";
|
|
if (Inst.isTerminator) OS << "|(1<<TID::Terminator)";
|
|
if (Inst.isReMaterializable) OS << "|(1<<TID::Rematerializable)";
|
|
if (Inst.isNotDuplicable) OS << "|(1<<TID::NotDuplicable)";
|
|
if (Inst.hasOptionalDef) OS << "|(1<<TID::HasOptionalDef)";
|
|
if (Inst.usesCustomInserter) OS << "|(1<<TID::UsesCustomInserter)";
|
|
if (Inst.isVariadic) OS << "|(1<<TID::Variadic)";
|
|
if (Inst.hasSideEffects) OS << "|(1<<TID::UnmodeledSideEffects)";
|
|
if (Inst.isAsCheapAsAMove) OS << "|(1<<TID::CheapAsAMove)";
|
|
if (Inst.hasExtraSrcRegAllocReq) OS << "|(1<<TID::ExtraSrcRegAllocReq)";
|
|
if (Inst.hasExtraDefRegAllocReq) OS << "|(1<<TID::ExtraDefRegAllocReq)";
|
|
|
|
// Emit all of the target-specific flags...
|
|
BitsInit *TSF = Inst.TheDef->getValueAsBitsInit("TSFlags");
|
|
if (!TSF) throw "no TSFlags?";
|
|
uint64_t Value = 0;
|
|
for (unsigned i = 0, e = TSF->getNumBits(); i != e; ++i) {
|
|
if (BitInit *Bit = dynamic_cast<BitInit*>(TSF->getBit(i)))
|
|
Value |= uint64_t(Bit->getValue()) << i;
|
|
else
|
|
throw "Invalid TSFlags bit in " + Inst.TheDef->getName();
|
|
}
|
|
OS << ", 0x";
|
|
OS.write_hex(Value);
|
|
OS << "ULL, ";
|
|
|
|
// Emit the implicit uses and defs lists...
|
|
std::vector<Record*> UseList = Inst.TheDef->getValueAsListOfDefs("Uses");
|
|
if (UseList.empty())
|
|
OS << "NULL, ";
|
|
else
|
|
OS << "ImplicitList" << EmittedLists[UseList] << ", ";
|
|
|
|
std::vector<Record*> DefList = Inst.TheDef->getValueAsListOfDefs("Defs");
|
|
if (DefList.empty())
|
|
OS << "NULL, ";
|
|
else
|
|
OS << "ImplicitList" << EmittedLists[DefList] << ", ";
|
|
|
|
std::map<Record*, unsigned>::iterator BI = BarriersMap.find(Inst.TheDef);
|
|
if (BI == BarriersMap.end())
|
|
OS << "NULL, ";
|
|
else
|
|
OS << "Barriers" << BI->second << ", ";
|
|
|
|
// Emit the operand info.
|
|
std::vector<std::string> OperandInfo = GetOperandInfo(Inst);
|
|
if (OperandInfo.empty())
|
|
OS << "0";
|
|
else
|
|
OS << "OperandInfo" << OpInfo.find(OperandInfo)->second;
|
|
|
|
OS << " }, // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
|
|
}
|